./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/35_double_lock_p3_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d 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/35_double_lock_p3_vs-pthread.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 8f8226cdfe97f42edd1b15fbab303246bf7577cc25c46c21444e4109afadd604 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:11:54,383 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:11:54,458 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:11:54,464 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:11:54,465 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:11:54,491 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:11:54,493 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:11:54,493 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:11:54,494 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:11:54,496 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:11:54,496 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:11:54,496 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:11:54,497 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:11:54,497 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:11:54,499 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:11:54,500 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:11:54,500 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:11:54,500 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:11:54,501 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:11:54,501 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:11:54,503 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:11:54,504 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:11:54,504 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:11:54,504 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:11:54,505 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:11:54,505 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:11:54,505 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:11:54,506 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:11:54,506 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:11:54,506 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:11:54,507 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:11:54,507 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:11:54,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:11:54,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:11:54,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:11:54,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:11:54,511 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:11:54,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:11:54,512 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:11:54,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:11:54,512 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:11:54,513 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:11:54,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f8226cdfe97f42edd1b15fbab303246bf7577cc25c46c21444e4109afadd604 [2024-10-13 12:11:54,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:11:54,807 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:11:54,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:11:54,811 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:11:54,812 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:11:54,813 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i [2024-10-13 12:11:56,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:11:56,536 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:11:56,537 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs-pthread.i [2024-10-13 12:11:56,550 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f7397b1d/f76a3cd59651411fb2cea5dcefe95ef0/FLAG2f47f74fe [2024-10-13 12:11:56,564 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f7397b1d/f76a3cd59651411fb2cea5dcefe95ef0 [2024-10-13 12:11:56,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:11:56,567 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:11:56,571 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:11:56,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:11:56,579 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:11:56,579 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:11:56" (1/1) ... [2024-10-13 12:11:56,580 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ade7e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:56, skipping insertion in model container [2024-10-13 12:11:56,581 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:11:56" (1/1) ... [2024-10-13 12:11:56,625 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:11:57,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:11:57,036 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:11:57,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:11:57,207 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:11:57,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57 WrapperNode [2024-10-13 12:11:57,208 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:11:57,209 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:11:57,209 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:11:57,210 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:11:57,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (1/1) ... [2024-10-13 12:11:57,231 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (1/1) ... [2024-10-13 12:11:57,256 INFO L138 Inliner]: procedures = 164, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 86 [2024-10-13 12:11:57,258 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:11:57,259 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:11:57,259 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:11:57,260 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:11:57,269 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (1/1) ... [2024-10-13 12:11:57,269 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (1/1) ... [2024-10-13 12:11:57,272 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (1/1) ... [2024-10-13 12:11:57,292 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5]. The 0 writes are split as follows [0, 0]. [2024-10-13 12:11:57,292 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (1/1) ... [2024-10-13 12:11:57,293 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (1/1) ... [2024-10-13 12:11:57,297 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (1/1) ... [2024-10-13 12:11:57,304 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (1/1) ... [2024-10-13 12:11:57,305 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (1/1) ... [2024-10-13 12:11:57,307 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (1/1) ... [2024-10-13 12:11:57,309 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:11:57,310 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:11:57,310 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:11:57,310 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:11:57,314 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (1/1) ... [2024-10-13 12:11:57,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:11:57,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:11:57,346 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) [2024-10-13 12:11:57,349 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 [2024-10-13 12:11:57,398 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2024-10-13 12:11:57,398 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2024-10-13 12:11:57,399 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-13 12:11:57,399 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-13 12:11:57,399 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 12:11:57,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:11:57,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:11:57,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:11:57,400 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 12:11:57,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:11:57,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:11:57,402 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:11:57,528 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:11:57,530 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:11:57,685 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:11:57,685 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:11:57,800 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:11:57,801 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-13 12:11:57,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:11:57 BoogieIcfgContainer [2024-10-13 12:11:57,801 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:11:57,804 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:11:57,805 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:11:57,808 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:11:57,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:11:56" (1/3) ... [2024-10-13 12:11:57,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784f403e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:11:57, skipping insertion in model container [2024-10-13 12:11:57,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:11:57" (2/3) ... [2024-10-13 12:11:57,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784f403e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:11:57, skipping insertion in model container [2024-10-13 12:11:57,811 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:11:57" (3/3) ... [2024-10-13 12:11:57,812 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs-pthread.i [2024-10-13 12:11:57,828 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:11:57,828 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-13 12:11:57,829 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:11:57,877 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:11:57,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 82 flow [2024-10-13 12:11:57,942 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-10-13 12:11:57,942 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:11:57,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 40 events. 4/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 102 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2024-10-13 12:11:57,950 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 37 transitions, 82 flow [2024-10-13 12:11:57,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 36 transitions, 79 flow [2024-10-13 12:11:57,964 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:11:57,972 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;@8e880bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:11:57,972 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-13 12:11:57,978 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:11:57,978 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2024-10-13 12:11:57,979 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:11:57,979 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:11:57,981 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:11:57,983 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 12:11:57,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:11:57,988 INFO L85 PathProgramCache]: Analyzing trace with hash 250028329, now seen corresponding path program 1 times [2024-10-13 12:11:57,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:11:57,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684461024] [2024-10-13 12:11:57,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:11:57,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:11:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:11:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:11:58,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:11:58,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684461024] [2024-10-13 12:11:58,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684461024] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:11:58,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:11:58,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:11:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272811812] [2024-10-13 12:11:58,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:11:58,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:11:58,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:11:58,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:11:58,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:11:58,209 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-10-13 12:11:58,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 79 flow. Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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) [2024-10-13 12:11:58,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:11:58,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-10-13 12:11:58,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:11:58,363 INFO L124 PetriNetUnfolderBase]: 198/365 cut-off events. [2024-10-13 12:11:58,364 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:11:58,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 721 conditions, 365 events. 198/365 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1800 event pairs, 185 based on Foata normal form. 106/454 useless extension candidates. Maximal degree in co-relation 711. Up to 343 conditions per place. [2024-10-13 12:11:58,373 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 20 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2024-10-13 12:11:58,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 105 flow [2024-10-13 12:11:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:11:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:11:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 46 transitions. [2024-10-13 12:11:58,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6216216216216216 [2024-10-13 12:11:58,387 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 79 flow. Second operand 2 states and 46 transitions. [2024-10-13 12:11:58,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 105 flow [2024-10-13 12:11:58,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:11:58,392 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 64 flow [2024-10-13 12:11:58,394 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-10-13 12:11:58,402 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-10-13 12:11:58,403 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 64 flow [2024-10-13 12:11:58,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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) [2024-10-13 12:11:58,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:11:58,405 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-13 12:11:58,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:11:58,406 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-13 12:11:58,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:11:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1121329882, now seen corresponding path program 1 times [2024-10-13 12:11:58,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:11:58,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108201412] [2024-10-13 12:11:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:11:58,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:11:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:11:58,474 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:11:58,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:11:58,524 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:11:58,525 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:11:58,530 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-13 12:11:58,534 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (3 of 5 remaining) [2024-10-13 12:11:58,534 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 5 remaining) [2024-10-13 12:11:58,535 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-10-13 12:11:58,538 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 5 remaining) [2024-10-13 12:11:58,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:11:58,539 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-13 12:11:58,545 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:11:58,545 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 12:11:58,617 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:11:58,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 65 transitions, 150 flow [2024-10-13 12:11:58,640 INFO L124 PetriNetUnfolderBase]: 5/58 cut-off events. [2024-10-13 12:11:58,641 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 12:11:58,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 58 events. 5/58 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 161 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 65. Up to 3 conditions per place. [2024-10-13 12:11:58,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 65 transitions, 150 flow [2024-10-13 12:11:58,645 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 49 transitions, 111 flow [2024-10-13 12:11:58,647 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:11:58,649 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;@8e880bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:11:58,649 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-13 12:11:58,652 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:11:58,653 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-10-13 12:11:58,653 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:11:58,654 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:11:58,654 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:11:58,654 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-13 12:11:58,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:11:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash 312862511, now seen corresponding path program 1 times [2024-10-13 12:11:58,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:11:58,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537704838] [2024-10-13 12:11:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:11:58,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:11:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:11:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:11:58,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:11:58,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537704838] [2024-10-13 12:11:58,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537704838] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:11:58,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:11:58,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:11:58,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321622462] [2024-10-13 12:11:58,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:11:58,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:11:58,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:11:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:11:58,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:11:58,721 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 65 [2024-10-13 12:11:58,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 111 flow. Second operand has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 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) [2024-10-13 12:11:58,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:11:58,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 65 [2024-10-13 12:11:58,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:11:59,479 INFO L124 PetriNetUnfolderBase]: 3751/5538 cut-off events. [2024-10-13 12:11:59,480 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2024-10-13 12:11:59,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11032 conditions, 5538 events. 3751/5538 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 32624 event pairs, 3474 based on Foata normal form. 1196/6418 useless extension candidates. Maximal degree in co-relation 11021. Up to 5348 conditions per place. [2024-10-13 12:11:59,534 INFO L140 encePairwiseOnDemand]: 61/65 looper letters, 32 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2024-10-13 12:11:59,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 161 flow [2024-10-13 12:11:59,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:11:59,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:11:59,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 74 transitions. [2024-10-13 12:11:59,540 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-10-13 12:11:59,540 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 111 flow. Second operand 2 states and 74 transitions. [2024-10-13 12:11:59,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 161 flow [2024-10-13 12:11:59,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:11:59,544 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 96 flow [2024-10-13 12:11:59,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-10-13 12:11:59,546 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2024-10-13 12:11:59,548 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 96 flow [2024-10-13 12:11:59,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 21.0) internal successors, (42), 2 states have internal predecessors, (42), 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) [2024-10-13 12:11:59,548 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:11:59,548 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:11:59,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 12:11:59,549 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-13 12:11:59,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:11:59,550 INFO L85 PathProgramCache]: Analyzing trace with hash 153112686, now seen corresponding path program 1 times [2024-10-13 12:11:59,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:11:59,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289624998] [2024-10-13 12:11:59,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:11:59,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:11:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:11:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:11:59,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:11:59,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289624998] [2024-10-13 12:11:59,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289624998] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:11:59,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:11:59,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:11:59,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153872427] [2024-10-13 12:11:59,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:11:59,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:11:59,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:11:59,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:11:59,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:11:59,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 65 [2024-10-13 12:11:59,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2024-10-13 12:11:59,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:11:59,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 65 [2024-10-13 12:11:59,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:12:00,098 INFO L124 PetriNetUnfolderBase]: 2714/4054 cut-off events. [2024-10-13 12:12:00,099 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-10-13 12:12:00,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8077 conditions, 4054 events. 2714/4054 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 23104 event pairs, 2506 based on Foata normal form. 398/4215 useless extension candidates. Maximal degree in co-relation 8072. Up to 3911 conditions per place. [2024-10-13 12:12:00,138 INFO L140 encePairwiseOnDemand]: 63/65 looper letters, 30 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2024-10-13 12:12:00,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 152 flow [2024-10-13 12:12:00,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:12:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:12:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-10-13 12:12:00,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4564102564102564 [2024-10-13 12:12:00,142 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 96 flow. Second operand 3 states and 89 transitions. [2024-10-13 12:12:00,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 152 flow [2024-10-13 12:12:00,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:12:00,144 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 92 flow [2024-10-13 12:12:00,145 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=65, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-10-13 12:12:00,145 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2024-10-13 12:12:00,145 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 92 flow [2024-10-13 12:12:00,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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) [2024-10-13 12:12:00,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:12:00,146 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 12:12:00,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 12:12:00,147 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2024-10-13 12:12:00,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:12:00,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1278669066, now seen corresponding path program 1 times [2024-10-13 12:12:00,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:12:00,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83387388] [2024-10-13 12:12:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:12:00,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:12:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:12:00,166 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:12:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:12:00,189 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:12:00,189 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:12:00,190 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-10-13 12:12:00,190 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2024-10-13 12:12:00,190 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 6 remaining) [2024-10-13 12:12:00,191 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-10-13 12:12:00,191 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2024-10-13 12:12:00,191 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2024-10-13 12:12:00,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 12:12:00,191 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-10-13 12:12:00,192 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:12:00,192 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 12:12:00,237 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:12:00,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 93 transitions, 222 flow [2024-10-13 12:12:00,248 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2024-10-13 12:12:00,249 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-13 12:12:00,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 76 events. 6/76 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 233 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 87. Up to 4 conditions per place. [2024-10-13 12:12:00,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 93 transitions, 222 flow [2024-10-13 12:12:00,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 62 transitions, 145 flow [2024-10-13 12:12:00,253 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:12:00,254 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;@8e880bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:12:00,254 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-13 12:12:00,256 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:12:00,256 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-10-13 12:12:00,256 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:12:00,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:12:00,257 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:12:00,257 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-13 12:12:00,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:12:00,258 INFO L85 PathProgramCache]: Analyzing trace with hash 402417233, now seen corresponding path program 1 times [2024-10-13 12:12:00,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:12:00,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166339428] [2024-10-13 12:12:00,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:12:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:12:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:12:00,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:12:00,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:12:00,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166339428] [2024-10-13 12:12:00,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166339428] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:12:00,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:12:00,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:12:00,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759237365] [2024-10-13 12:12:00,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:12:00,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:12:00,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:12:00,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:12:00,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:12:00,311 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2024-10-13 12:12:00,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 145 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) [2024-10-13 12:12:00,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:12:00,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2024-10-13 12:12:00,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:12:07,295 INFO L124 PetriNetUnfolderBase]: 58806/78313 cut-off events. [2024-10-13 12:12:07,297 INFO L125 PetriNetUnfolderBase]: For 3412/3412 co-relation queries the response was YES. [2024-10-13 12:12:07,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156771 conditions, 78313 events. 58806/78313 cut-off events. For 3412/3412 co-relation queries the response was YES. Maximal size of possible extension queue 2927. Compared 506464 event pairs, 54173 based on Foata normal form. 13175/86404 useless extension candidates. Maximal degree in co-relation 156759. Up to 76375 conditions per place. [2024-10-13 12:12:07,905 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 44 selfloop transitions, 0 changer transitions 0/55 dead transitions. [2024-10-13 12:12:07,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 219 flow [2024-10-13 12:12:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:12:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:12:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 102 transitions. [2024-10-13 12:12:07,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-10-13 12:12:07,909 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 145 flow. Second operand 2 states and 102 transitions. [2024-10-13 12:12:07,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 219 flow [2024-10-13 12:12:07,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 216 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 12:12:07,919 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 128 flow [2024-10-13 12:12:07,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=128, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-10-13 12:12:07,921 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -5 predicate places. [2024-10-13 12:12:07,922 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 128 flow [2024-10-13 12:12:07,922 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) [2024-10-13 12:12:07,922 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:12:07,923 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:12:07,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 12:12:07,923 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-13 12:12:07,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:12:07,925 INFO L85 PathProgramCache]: Analyzing trace with hash 6601770, now seen corresponding path program 1 times [2024-10-13 12:12:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:12:07,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264847815] [2024-10-13 12:12:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:12:07,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:12:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:12:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:12:07,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:12:07,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264847815] [2024-10-13 12:12:07,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264847815] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:12:07,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:12:07,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:12:07,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014914463] [2024-10-13 12:12:07,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:12:07,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:12:07,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:12:07,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:12:07,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:12:08,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2024-10-13 12:12:08,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-10-13 12:12:08,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:12:08,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2024-10-13 12:12:08,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:12:11,587 INFO L124 PetriNetUnfolderBase]: 43007/57637 cut-off events. [2024-10-13 12:12:11,587 INFO L125 PetriNetUnfolderBase]: For 1482/1482 co-relation queries the response was YES. [2024-10-13 12:12:11,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115022 conditions, 57637 events. 43007/57637 cut-off events. For 1482/1482 co-relation queries the response was YES. Maximal size of possible extension queue 2287. Compared 365457 event pairs, 39532 based on Foata normal form. 4391/58215 useless extension candidates. Maximal degree in co-relation 115016. Up to 56183 conditions per place. [2024-10-13 12:12:12,001 INFO L140 encePairwiseOnDemand]: 91/93 looper letters, 42 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2024-10-13 12:12:12,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 208 flow [2024-10-13 12:12:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:12:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:12:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-10-13 12:12:12,007 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44802867383512546 [2024-10-13 12:12:12,009 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 128 flow. Second operand 3 states and 125 transitions. [2024-10-13 12:12:12,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 208 flow [2024-10-13 12:12:12,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:12:12,012 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 124 flow [2024-10-13 12:12:12,013 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2024-10-13 12:12:12,013 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2024-10-13 12:12:12,014 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 124 flow [2024-10-13 12:12:12,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2024-10-13 12:12:12,014 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:12:12,015 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:12:12,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-13 12:12:12,015 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-13 12:12:12,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:12:12,016 INFO L85 PathProgramCache]: Analyzing trace with hash -220161489, now seen corresponding path program 1 times [2024-10-13 12:12:12,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:12:12,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701191397] [2024-10-13 12:12:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:12:12,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:12:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:12:12,035 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:12:12,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:12:12,052 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:12:12,052 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:12:12,053 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-10-13 12:12:12,053 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2024-10-13 12:12:12,053 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (4 of 7 remaining) [2024-10-13 12:12:12,053 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2024-10-13 12:12:12,054 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2024-10-13 12:12:12,054 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-10-13 12:12:12,054 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-10-13 12:12:12,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:12:12,054 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-10-13 12:12:12,055 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:12:12,055 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-13 12:12:12,101 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 12:12:12,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 121 transitions, 298 flow [2024-10-13 12:12:12,116 INFO L124 PetriNetUnfolderBase]: 7/94 cut-off events. [2024-10-13 12:12:12,116 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-13 12:12:12,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 94 events. 7/94 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 308 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 110. Up to 5 conditions per place. [2024-10-13 12:12:12,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 121 transitions, 298 flow [2024-10-13 12:12:12,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 75 transitions, 181 flow [2024-10-13 12:12:12,119 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:12:12,121 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;@8e880bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:12:12,121 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-10-13 12:12:12,123 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:12:12,123 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-10-13 12:12:12,123 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:12:12,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:12:12,123 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:12:12,123 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 5 more)] === [2024-10-13 12:12:12,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:12:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash 518692495, now seen corresponding path program 1 times [2024-10-13 12:12:12,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:12:12,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394356754] [2024-10-13 12:12:12,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:12:12,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:12:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:12:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:12:12,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:12:12,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394356754] [2024-10-13 12:12:12,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394356754] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:12:12,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:12:12,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:12:12,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120549669] [2024-10-13 12:12:12,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:12:12,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:12:12,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:12:12,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:12:12,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:12:12,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 121 [2024-10-13 12:12:12,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 181 flow. Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:12:12,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:12:12,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 121 [2024-10-13 12:12:12,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand