./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 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/weaver/popl20-bad-threaded-sum-2.wvr.c -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 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:20:11,472 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:20:11,532 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:20:11,539 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:20:11,540 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:20:11,565 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:20:11,567 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:20:11,567 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:20:11,568 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:20:11,569 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:20:11,569 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:20:11,570 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:20:11,570 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:20:11,571 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:20:11,572 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:20:11,572 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:20:11,573 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:20:11,573 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:20:11,573 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:20:11,573 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:20:11,574 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:20:11,576 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:20:11,576 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:20:11,576 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:20:11,576 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:20:11,577 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:20:11,577 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:20:11,577 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:20:11,577 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:20:11,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:20:11,578 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:20:11,578 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:20:11,578 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:20:11,578 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:20:11,578 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:20:11,578 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:20:11,579 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:20:11,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:20:11,579 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:20:11,581 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:20:11,581 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:20:11,581 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:20:11,581 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b30bad195dde021066febd52c7985271e0448c265b66e6efcbd9c3306420e73 [2024-10-24 19:20:11,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:20:11,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:20:11,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:20:11,829 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:20:11,833 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:20:11,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-10-24 19:20:13,067 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:20:13,291 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:20:13,291 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-threaded-sum-2.wvr.c [2024-10-24 19:20:13,298 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b206da26/158efea6a9724265956cecae125794eb/FLAG42b98dc11 [2024-10-24 19:20:13,634 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b206da26/158efea6a9724265956cecae125794eb [2024-10-24 19:20:13,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:20:13,638 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:20:13,644 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:20:13,644 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:20:13,649 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:20:13,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,651 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e94a5a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13, skipping insertion in model container [2024-10-24 19:20:13,651 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,668 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:20:13,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:20:13,860 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:20:13,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:20:13,895 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:20:13,896 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13 WrapperNode [2024-10-24 19:20:13,896 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:20:13,897 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:20:13,897 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:20:13,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:20:13,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,908 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,922 INFO L138 Inliner]: procedures = 20, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 50 [2024-10-24 19:20:13,922 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:20:13,923 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:20:13,924 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:20:13,924 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:20:13,931 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,933 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,968 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-24 19:20:13,968 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,968 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,977 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,984 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,988 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,989 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:20:13,989 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:20:13,990 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:20:13,990 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:20:13,992 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (1/1) ... [2024-10-24 19:20:13,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:20:14,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:20:14,053 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) [2024-10-24 19:20:14,056 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 [2024-10-24 19:20:14,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:20:14,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:20:14,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:20:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:20:14,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:20:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 19:20:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 19:20:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 19:20:14,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:20:14,093 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:20:14,094 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:20:14,178 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:20:14,180 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:20:14,328 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:20:14,332 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:20:14,426 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:20:14,426 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 19:20:14,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:20:14 BoogieIcfgContainer [2024-10-24 19:20:14,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:20:14,427 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:20:14,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:20:14,430 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:20:14,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:20:13" (1/3) ... [2024-10-24 19:20:14,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0ba053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:20:14, skipping insertion in model container [2024-10-24 19:20:14,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:13" (2/3) ... [2024-10-24 19:20:14,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0ba053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:20:14, skipping insertion in model container [2024-10-24 19:20:14,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:20:14" (3/3) ... [2024-10-24 19:20:14,432 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-threaded-sum-2.wvr.c [2024-10-24 19:20:14,445 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:20:14,445 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-24 19:20:14,445 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:20:14,484 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 19:20:14,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 27 transitions, 68 flow [2024-10-24 19:20:14,535 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-10-24 19:20:14,536 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:20:14,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 2/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-10-24 19:20:14,538 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 27 transitions, 68 flow [2024-10-24 19:20:14,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 60 flow [2024-10-24 19:20:14,548 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:20:14,553 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;@4d000b48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:20:14,554 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-24 19:20:14,561 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:20:14,561 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2024-10-24 19:20:14,561 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:20:14,561 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:14,562 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:14,562 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 19:20:14,566 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:14,567 INFO L85 PathProgramCache]: Analyzing trace with hash -234913753, now seen corresponding path program 1 times [2024-10-24 19:20:14,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:20:14,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790049253] [2024-10-24 19:20:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:14,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:20:14,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:14,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:20:14,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790049253] [2024-10-24 19:20:14,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790049253] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:14,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:14,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:20:15,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255189865] [2024-10-24 19:20:15,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:15,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:20:15,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:20:15,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:20:15,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:20:15,044 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 27 [2024-10-24 19:20:15,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2024-10-24 19:20:15,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:15,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 27 [2024-10-24 19:20:15,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:15,175 INFO L124 PetriNetUnfolderBase]: 104/206 cut-off events. [2024-10-24 19:20:15,177 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-24 19:20:15,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 206 events. 104/206 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 764 event pairs, 8 based on Foata normal form. 13/214 useless extension candidates. Maximal degree in co-relation 366. Up to 117 conditions per place. [2024-10-24 19:20:15,181 INFO L140 encePairwiseOnDemand]: 20/27 looper letters, 29 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2024-10-24 19:20:15,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 42 transitions, 175 flow [2024-10-24 19:20:15,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:20:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:20:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-10-24 19:20:15,192 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6518518518518519 [2024-10-24 19:20:15,193 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 5 states and 88 transitions. [2024-10-24 19:20:15,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 42 transitions, 175 flow [2024-10-24 19:20:15,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 42 transitions, 161 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:20:15,197 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 93 flow [2024-10-24 19:20:15,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2024-10-24 19:20:15,203 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2024-10-24 19:20:15,204 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 93 flow [2024-10-24 19:20:15,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2024-10-24 19:20:15,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:15,204 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:15,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 19:20:15,205 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 19:20:15,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash 188808021, now seen corresponding path program 1 times [2024-10-24 19:20:15,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:20:15,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390087789] [2024-10-24 19:20:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:15,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:20:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:20:15,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:20:15,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390087789] [2024-10-24 19:20:15,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390087789] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:15,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:15,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:20:15,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615360784] [2024-10-24 19:20:15,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:15,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:20:15,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:20:15,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:20:15,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:20:15,439 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 27 [2024-10-24 19:20:15,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:15,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:15,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 27 [2024-10-24 19:20:15,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:15,511 INFO L124 PetriNetUnfolderBase]: 116/238 cut-off events. [2024-10-24 19:20:15,512 INFO L125 PetriNetUnfolderBase]: For 194/203 co-relation queries the response was YES. [2024-10-24 19:20:15,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 238 events. 116/238 cut-off events. For 194/203 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1029 event pairs, 11 based on Foata normal form. 18/243 useless extension candidates. Maximal degree in co-relation 234. Up to 124 conditions per place. [2024-10-24 19:20:15,515 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 26 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2024-10-24 19:20:15,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 195 flow [2024-10-24 19:20:15,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:20:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:20:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-10-24 19:20:15,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-10-24 19:20:15,518 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 93 flow. Second operand 4 states and 66 transitions. [2024-10-24 19:20:15,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 195 flow [2024-10-24 19:20:15,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 192 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:20:15,521 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 104 flow [2024-10-24 19:20:15,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-10-24 19:20:15,523 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2024-10-24 19:20:15,523 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 104 flow [2024-10-24 19:20:15,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:15,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:15,524 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:15,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 19:20:15,524 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 19:20:15,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:15,524 INFO L85 PathProgramCache]: Analyzing trace with hash 44148424, now seen corresponding path program 1 times [2024-10-24 19:20:15,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:20:15,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201286307] [2024-10-24 19:20:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:15,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:20:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:15,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:20:15,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201286307] [2024-10-24 19:20:15,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201286307] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:15,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:15,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:20:15,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436183929] [2024-10-24 19:20:15,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:15,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:20:15,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:20:15,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:20:15,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:20:15,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 27 [2024-10-24 19:20:15,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2024-10-24 19:20:15,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:15,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 27 [2024-10-24 19:20:15,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:15,800 INFO L124 PetriNetUnfolderBase]: 116/241 cut-off events. [2024-10-24 19:20:15,800 INFO L125 PetriNetUnfolderBase]: For 180/207 co-relation queries the response was YES. [2024-10-24 19:20:15,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 241 events. 116/241 cut-off events. For 180/207 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 983 event pairs, 15 based on Foata normal form. 23/260 useless extension candidates. Maximal degree in co-relation 298. Up to 83 conditions per place. [2024-10-24 19:20:15,827 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 30 selfloop transitions, 7 changer transitions 0/44 dead transitions. [2024-10-24 19:20:15,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 44 transitions, 238 flow [2024-10-24 19:20:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:20:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:20:15,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-10-24 19:20:15,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-10-24 19:20:15,829 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 104 flow. Second operand 5 states and 84 transitions. [2024-10-24 19:20:15,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 44 transitions, 238 flow [2024-10-24 19:20:15,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 44 transitions, 233 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:20:15,832 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 150 flow [2024-10-24 19:20:15,832 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=150, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-10-24 19:20:15,833 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2024-10-24 19:20:15,833 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 150 flow [2024-10-24 19:20:15,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 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) [2024-10-24 19:20:15,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:15,833 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:15,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 19:20:15,834 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 19:20:15,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:15,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1872370852, now seen corresponding path program 2 times [2024-10-24 19:20:15,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:20:15,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847702306] [2024-10-24 19:20:15,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:15,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:20:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:16,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:20:16,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847702306] [2024-10-24 19:20:16,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847702306] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:20:16,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838220988] [2024-10-24 19:20:16,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:20:16,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:20:16,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:20:16,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:20:16,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 19:20:16,442 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:20:16,442 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:20:16,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 19:20:16,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:16,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:20:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:16,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838220988] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:20:16,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:20:16,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-10-24 19:20:16,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194138535] [2024-10-24 19:20:16,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:20:16,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 19:20:16,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:20:16,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 19:20:16,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-10-24 19:20:16,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-10-24 19:20:16,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 150 flow. Second operand has 18 states, 18 states have (on average 9.5) internal successors, (171), 18 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:16,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:16,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-10-24 19:20:16,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:19,260 INFO L124 PetriNetUnfolderBase]: 811/1459 cut-off events. [2024-10-24 19:20:19,260 INFO L125 PetriNetUnfolderBase]: For 1446/1446 co-relation queries the response was YES. [2024-10-24 19:20:19,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4266 conditions, 1459 events. 811/1459 cut-off events. For 1446/1446 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7447 event pairs, 11 based on Foata normal form. 4/1462 useless extension candidates. Maximal degree in co-relation 1745. Up to 346 conditions per place. [2024-10-24 19:20:19,269 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 135 selfloop transitions, 85 changer transitions 40/264 dead transitions. [2024-10-24 19:20:19,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 264 transitions, 1607 flow [2024-10-24 19:20:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-24 19:20:19,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-10-24 19:20:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 549 transitions. [2024-10-24 19:20:19,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-10-24 19:20:19,273 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 150 flow. Second operand 43 states and 549 transitions. [2024-10-24 19:20:19,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 264 transitions, 1607 flow [2024-10-24 19:20:19,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 264 transitions, 1595 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:20:19,279 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 957 flow [2024-10-24 19:20:19,280 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=957, PETRI_PLACES=110, PETRI_TRANSITIONS=115} [2024-10-24 19:20:19,280 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 81 predicate places. [2024-10-24 19:20:19,280 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 957 flow [2024-10-24 19:20:19,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.5) internal successors, (171), 18 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:19,281 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:19,281 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:19,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 19:20:19,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:20:19,482 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 19:20:19,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:19,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1287349269, now seen corresponding path program 3 times [2024-10-24 19:20:19,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:20:19,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834684611] [2024-10-24 19:20:19,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:19,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:20:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:19,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:20:19,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834684611] [2024-10-24 19:20:19,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834684611] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:19,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:19,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 19:20:19,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770671374] [2024-10-24 19:20:19,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:19,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:20:19,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:20:19,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:20:19,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:20:19,721 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-10-24 19:20:19,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 115 transitions, 957 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2024-10-24 19:20:19,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:19,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-10-24 19:20:19,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:20,091 INFO L124 PetriNetUnfolderBase]: 881/1555 cut-off events. [2024-10-24 19:20:20,092 INFO L125 PetriNetUnfolderBase]: For 14288/14430 co-relation queries the response was YES. [2024-10-24 19:20:20,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7789 conditions, 1555 events. 881/1555 cut-off events. For 14288/14430 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7884 event pairs, 0 based on Foata normal form. 26/1580 useless extension candidates. Maximal degree in co-relation 7728. Up to 440 conditions per place. [2024-10-24 19:20:20,124 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 146 selfloop transitions, 68 changer transitions 0/223 dead transitions. [2024-10-24 19:20:20,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 223 transitions, 2311 flow [2024-10-24 19:20:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 19:20:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 19:20:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 120 transitions. [2024-10-24 19:20:20,130 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-10-24 19:20:20,130 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 957 flow. Second operand 9 states and 120 transitions. [2024-10-24 19:20:20,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 223 transitions, 2311 flow [2024-10-24 19:20:20,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 223 transitions, 1982 flow, removed 153 selfloop flow, removed 10 redundant places. [2024-10-24 19:20:20,215 INFO L231 Difference]: Finished difference. Result has 108 places, 151 transitions, 1370 flow [2024-10-24 19:20:20,220 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1370, PETRI_PLACES=108, PETRI_TRANSITIONS=151} [2024-10-24 19:20:20,221 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 79 predicate places. [2024-10-24 19:20:20,221 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 151 transitions, 1370 flow [2024-10-24 19:20:20,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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) [2024-10-24 19:20:20,222 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:20,222 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:20,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 19:20:20,222 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 19:20:20,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:20,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1918132206, now seen corresponding path program 1 times [2024-10-24 19:20:20,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:20:20,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394901852] [2024-10-24 19:20:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:20,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:20:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:21,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:20:21,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394901852] [2024-10-24 19:20:21,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394901852] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:20:21,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476262697] [2024-10-24 19:20:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:21,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:20:21,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:20:21,099 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:20:21,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 19:20:21,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:21,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-24 19:20:21,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:21,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:21,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:20:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:22,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476262697] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:20:22,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:20:22,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2024-10-24 19:20:22,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950510557] [2024-10-24 19:20:22,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:20:22,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 19:20:22,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:20:22,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 19:20:22,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2024-10-24 19:20:22,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-10-24 19:20:22,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 151 transitions, 1370 flow. Second operand has 25 states, 25 states have (on average 9.2) internal successors, (230), 25 states have internal predecessors, (230), 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) [2024-10-24 19:20:22,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:22,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-10-24 19:20:22,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:36,769 WARN L286 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 49 DAG size of output: 47 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-10-24 19:20:41,411 INFO L124 PetriNetUnfolderBase]: 2389/4325 cut-off events. [2024-10-24 19:20:41,411 INFO L125 PetriNetUnfolderBase]: For 43086/43112 co-relation queries the response was YES. [2024-10-24 19:20:41,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23535 conditions, 4325 events. 2389/4325 cut-off events. For 43086/43112 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 27588 event pairs, 31 based on Foata normal form. 41/4358 useless extension candidates. Maximal degree in co-relation 19412. Up to 1089 conditions per place. [2024-10-24 19:20:41,448 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 327 selfloop transitions, 309 changer transitions 113/755 dead transitions. [2024-10-24 19:20:41,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 755 transitions, 8673 flow [2024-10-24 19:20:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-10-24 19:20:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2024-10-24 19:20:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 1166 transitions. [2024-10-24 19:20:41,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4452080946926308 [2024-10-24 19:20:41,453 INFO L175 Difference]: Start difference. First operand has 108 places, 151 transitions, 1370 flow. Second operand 97 states and 1166 transitions. [2024-10-24 19:20:41,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 755 transitions, 8673 flow [2024-10-24 19:20:41,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 755 transitions, 8455 flow, removed 106 selfloop flow, removed 2 redundant places. [2024-10-24 19:20:41,570 INFO L231 Difference]: Finished difference. Result has 259 places, 436 transitions, 5753 flow [2024-10-24 19:20:41,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=5753, PETRI_PLACES=259, PETRI_TRANSITIONS=436} [2024-10-24 19:20:41,571 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 230 predicate places. [2024-10-24 19:20:41,571 INFO L471 AbstractCegarLoop]: Abstraction has has 259 places, 436 transitions, 5753 flow [2024-10-24 19:20:41,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.2) internal successors, (230), 25 states have internal predecessors, (230), 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) [2024-10-24 19:20:41,572 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:41,572 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:41,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 19:20:41,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-24 19:20:41,776 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-24 19:20:41,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:41,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1843514614, now seen corresponding path program 2 times [2024-10-24 19:20:41,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:20:41,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039906700] [2024-10-24 19:20:41,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:41,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:20:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:50,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:20:50,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039906700] [2024-10-24 19:20:50,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039906700] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:20:50,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420128048] [2024-10-24 19:20:50,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:20:50,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:20:50,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:20:50,315 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:20:50,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 19:20:50,364 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:20:50,364 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:20:50,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-24 19:20:50,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:21:15,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:21:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:21:16,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420128048] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:21:16,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:21:16,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-10-24 19:21:16,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10649366] [2024-10-24 19:21:16,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:21:16,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 19:21:16,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:21:16,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 19:21:16,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=467, Unknown=8, NotChecked=0, Total=600 [2024-10-24 19:21:20,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:24,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:24,271 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 27 [2024-10-24 19:21:24,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 436 transitions, 5753 flow. Second operand has 25 states, 25 states have (on average 9.4) internal successors, (235), 25 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:24,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:24,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 27 [2024-10-24 19:21:24,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:28,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:32,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:36,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:40,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:44,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:48,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:52,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-10-24 19:21:56,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers []