./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-theta/exponential-nondet.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 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-theta/exponential-nondet.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 f87ddde6d61a5d434f69c49dc65eaf95f54327ebb0ef5acca382e4d4744605ae --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:52:44,187 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:52:44,244 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:52:44,249 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:52:44,249 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:52:44,271 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:52:44,271 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:52:44,271 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:52:44,272 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:52:44,272 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:52:44,272 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:52:44,273 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:52:44,273 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:52:44,273 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:52:44,273 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:52:44,274 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:52:44,274 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:52:44,274 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:52:44,274 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:52:44,275 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:52:44,275 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:52:44,278 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:52:44,278 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:52:44,279 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:52:44,279 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:52:44,279 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:52:44,279 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:52:44,279 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:52:44,279 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:52:44,279 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:52:44,279 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:52:44,280 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:52:44,280 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:52:44,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:52:44,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:52:44,280 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:52:44,280 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:52:44,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:52:44,280 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:52:44,281 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:52:44,281 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:52:44,283 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:52:44,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f87ddde6d61a5d434f69c49dc65eaf95f54327ebb0ef5acca382e4d4744605ae [2024-11-20 17:52:44,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:52:44,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:52:44,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:52:44,487 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:52:44,487 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:52:44,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/exponential-nondet.i [2024-11-20 17:52:45,682 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:52:45,904 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:52:45,904 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/exponential-nondet.i [2024-11-20 17:52:45,919 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c23922806/17fce824319542ceab5c681309911e69/FLAG8df7992b4 [2024-11-20 17:52:45,932 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c23922806/17fce824319542ceab5c681309911e69 [2024-11-20 17:52:45,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:52:45,935 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:52:45,936 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:52:45,937 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:52:45,940 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:52:45,941 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:52:45" (1/1) ... [2024-11-20 17:52:45,941 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@746350ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:45, skipping insertion in model container [2024-11-20 17:52:45,941 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:52:45" (1/1) ... [2024-11-20 17:52:45,974 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:52:46,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:52:46,223 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:52:46,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:52:46,303 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:52:46,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46 WrapperNode [2024-11-20 17:52:46,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:52:46,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:52:46,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:52:46,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:52:46,310 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (1/1) ... [2024-11-20 17:52:46,324 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (1/1) ... [2024-11-20 17:52:46,340 INFO L138 Inliner]: procedures = 169, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-11-20 17:52:46,340 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:52:46,341 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:52:46,341 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:52:46,341 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:52:46,349 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (1/1) ... [2024-11-20 17:52:46,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (1/1) ... [2024-11-20 17:52:46,351 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (1/1) ... [2024-11-20 17:52:46,361 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]. [2024-11-20 17:52:46,361 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (1/1) ... [2024-11-20 17:52:46,361 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (1/1) ... [2024-11-20 17:52:46,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (1/1) ... [2024-11-20 17:52:46,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (1/1) ... [2024-11-20 17:52:46,367 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (1/1) ... [2024-11-20 17:52:46,368 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (1/1) ... [2024-11-20 17:52:46,369 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:52:46,370 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:52:46,370 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:52:46,370 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:52:46,374 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (1/1) ... [2024-11-20 17:52:46,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:52:46,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:52:46,405 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) [2024-11-20 17:52:46,410 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 [2024-11-20 17:52:46,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:52:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-20 17:52:46,444 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-20 17:52:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-20 17:52:46,445 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-20 17:52:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:52:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:52:46,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:52:46,446 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:52:46,553 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:52:46,555 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:52:46,685 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:52:46,685 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:52:46,845 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:52:46,845 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-20 17:52:46,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:52:46 BoogieIcfgContainer [2024-11-20 17:52:46,846 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:52:46,848 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:52:46,848 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:52:46,850 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:52:46,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:52:45" (1/3) ... [2024-11-20 17:52:46,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2d8373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:52:46, skipping insertion in model container [2024-11-20 17:52:46,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:52:46" (2/3) ... [2024-11-20 17:52:46,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2d8373 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:52:46, skipping insertion in model container [2024-11-20 17:52:46,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:52:46" (3/3) ... [2024-11-20 17:52:46,853 INFO L112 eAbstractionObserver]: Analyzing ICFG exponential-nondet.i [2024-11-20 17:52:46,866 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:52:46,866 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-20 17:52:46,866 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:52:46,890 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:52:46,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 62 flow [2024-11-20 17:52:46,934 INFO L124 PetriNetUnfolderBase]: 6/40 cut-off events. [2024-11-20 17:52:46,935 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:52:46,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 40 events. 6/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 25. Up to 4 conditions per place. [2024-11-20 17:52:46,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 62 flow [2024-11-20 17:52:46,939 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 25 transitions, 57 flow [2024-11-20 17:52:46,945 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:52:46,950 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;@27e99349, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:52:46,950 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-20 17:52:46,955 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:52:46,955 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-20 17:52:46,956 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:52:46,956 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:46,956 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:52:46,956 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:46,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:46,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1636255911, now seen corresponding path program 1 times [2024-11-20 17:52:46,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:46,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002382143] [2024-11-20 17:52:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:46,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:47,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:47,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002382143] [2024-11-20 17:52:47,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002382143] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:52:47,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:52:47,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:52:47,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219109027] [2024-11-20 17:52:47,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:52:47,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:52:47,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:47,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:52:47,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:52:47,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-11-20 17:52:47,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:47,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:47,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-11-20 17:52:47,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:47,204 INFO L124 PetriNetUnfolderBase]: 32/95 cut-off events. [2024-11-20 17:52:47,205 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:52:47,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 95 events. 32/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 393 event pairs, 27 based on Foata normal form. 15/92 useless extension candidates. Maximal degree in co-relation 146. Up to 70 conditions per place. [2024-11-20 17:52:47,208 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 11 selfloop transitions, 1 changer transitions 1/21 dead transitions. [2024-11-20 17:52:47,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 21 transitions, 75 flow [2024-11-20 17:52:47,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:52:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:52:47,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-11-20 17:52:47,217 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5308641975308642 [2024-11-20 17:52:47,218 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 57 flow. Second operand 3 states and 43 transitions. [2024-11-20 17:52:47,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 21 transitions, 75 flow [2024-11-20 17:52:47,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 21 transitions, 74 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:52:47,222 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 48 flow [2024-11-20 17:52:47,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2024-11-20 17:52:47,228 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2024-11-20 17:52:47,229 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 48 flow [2024-11-20 17:52:47,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:47,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:47,229 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:52:47,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:52:47,230 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:47,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:47,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1636255272, now seen corresponding path program 1 times [2024-11-20 17:52:47,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:47,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000631854] [2024-11-20 17:52:47,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:47,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-20 17:52:47,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606538078] [2024-11-20 17:52:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:47,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:47,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:52:47,270 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) [2024-11-20 17:52:47,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:52:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:47,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 17:52:47,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:52:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:47,360 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:52:47,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:47,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000631854] [2024-11-20 17:52:47,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-20 17:52:47,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606538078] [2024-11-20 17:52:47,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606538078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:52:47,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:52:47,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:52:47,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871067453] [2024-11-20 17:52:47,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:52:47,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:52:47,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:47,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:52:47,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:52:47,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 27 [2024-11-20 17:52:47,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2024-11-20 17:52:47,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:47,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 27 [2024-11-20 17:52:47,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:47,445 INFO L124 PetriNetUnfolderBase]: 45/113 cut-off events. [2024-11-20 17:52:47,446 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:52:47,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 113 events. 45/113 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 423 event pairs, 7 based on Foata normal form. 7/102 useless extension candidates. Maximal degree in co-relation 212. Up to 65 conditions per place. [2024-11-20 17:52:47,447 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 18 selfloop transitions, 2 changer transitions 5/32 dead transitions. [2024-11-20 17:52:47,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 124 flow [2024-11-20 17:52:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:52:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:52:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 72 transitions. [2024-11-20 17:52:47,449 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-20 17:52:47,450 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 48 flow. Second operand 5 states and 72 transitions. [2024-11-20 17:52:47,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 124 flow [2024-11-20 17:52:47,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:52:47,451 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 59 flow [2024-11-20 17:52:47,451 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=59, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2024-11-20 17:52:47,452 INFO L277 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2024-11-20 17:52:47,452 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 59 flow [2024-11-20 17:52:47,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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) [2024-11-20 17:52:47,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:47,453 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:52:47,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 17:52:47,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:47,658 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:47,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:47,658 INFO L85 PathProgramCache]: Analyzing trace with hash -635828590, now seen corresponding path program 1 times [2024-11-20 17:52:47,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:47,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942763801] [2024-11-20 17:52:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:47,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:52:47,683 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:52:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:52:47,708 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:52:47,709 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:52:47,713 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-20 17:52:47,715 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (2 of 4 remaining) [2024-11-20 17:52:47,715 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 4 remaining) [2024-11-20 17:52:47,715 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-11-20 17:52:47,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:52:47,715 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-20 17:52:47,717 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:52:47,720 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-20 17:52:47,741 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:52:47,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 35 transitions, 90 flow [2024-11-20 17:52:47,751 INFO L124 PetriNetUnfolderBase]: 9/64 cut-off events. [2024-11-20 17:52:47,751 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:52:47,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 64 events. 9/64 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 144 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 53. Up to 6 conditions per place. [2024-11-20 17:52:47,752 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 35 transitions, 90 flow [2024-11-20 17:52:47,752 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 33 transitions, 84 flow [2024-11-20 17:52:47,753 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:52:47,755 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;@27e99349, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:52:47,755 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-20 17:52:47,758 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:52:47,758 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-20 17:52:47,758 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:52:47,758 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:47,758 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:52:47,760 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:47,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:47,760 INFO L85 PathProgramCache]: Analyzing trace with hash -600834951, now seen corresponding path program 1 times [2024-11-20 17:52:47,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:47,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442298727] [2024-11-20 17:52:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:47,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:47,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:47,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442298727] [2024-11-20 17:52:47,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442298727] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:52:47,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:52:47,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:52:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661439789] [2024-11-20 17:52:47,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:52:47,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:52:47,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:47,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:52:47,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:52:47,811 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2024-11-20 17:52:47,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-11-20 17:52:47,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:47,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2024-11-20 17:52:47,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:47,904 INFO L124 PetriNetUnfolderBase]: 284/559 cut-off events. [2024-11-20 17:52:47,904 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-20 17:52:47,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 559 events. 284/559 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3203 event pairs, 263 based on Foata normal form. 63/540 useless extension candidates. Maximal degree in co-relation 434. Up to 450 conditions per place. [2024-11-20 17:52:47,908 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 15 selfloop transitions, 1 changer transitions 1/29 dead transitions. [2024-11-20 17:52:47,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 29 transitions, 110 flow [2024-11-20 17:52:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:52:47,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:52:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-11-20 17:52:47,910 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-11-20 17:52:47,910 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 84 flow. Second operand 3 states and 59 transitions. [2024-11-20 17:52:47,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 29 transitions, 110 flow [2024-11-20 17:52:47,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 29 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:52:47,912 INFO L231 Difference]: Finished difference. Result has 39 places, 28 transitions, 75 flow [2024-11-20 17:52:47,912 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=39, PETRI_TRANSITIONS=28} [2024-11-20 17:52:47,913 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2024-11-20 17:52:47,914 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 28 transitions, 75 flow [2024-11-20 17:52:47,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-11-20 17:52:47,914 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:47,914 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:52:47,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:52:47,915 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:47,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:47,916 INFO L85 PathProgramCache]: Analyzing trace with hash -600834312, now seen corresponding path program 1 times [2024-11-20 17:52:47,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:47,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74428083] [2024-11-20 17:52:47,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:47,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-20 17:52:47,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285967438] [2024-11-20 17:52:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:47,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:47,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:52:47,941 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) [2024-11-20 17:52:47,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:52:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:47,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 17:52:47,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:52:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:48,021 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:52:48,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:48,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74428083] [2024-11-20 17:52:48,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-20 17:52:48,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285967438] [2024-11-20 17:52:48,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285967438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:52:48,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:52:48,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:52:48,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002722336] [2024-11-20 17:52:48,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:52:48,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:52:48,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:48,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:52:48,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:52:48,038 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2024-11-20 17:52:48,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 28 transitions, 75 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) [2024-11-20 17:52:48,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:48,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2024-11-20 17:52:48,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:48,166 INFO L124 PetriNetUnfolderBase]: 649/1085 cut-off events. [2024-11-20 17:52:48,168 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-20 17:52:48,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2149 conditions, 1085 events. 649/1085 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5827 event pairs, 135 based on Foata normal form. 43/1028 useless extension candidates. Maximal degree in co-relation 2140. Up to 821 conditions per place. [2024-11-20 17:52:48,177 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 27 selfloop transitions, 3 changer transitions 11/51 dead transitions. [2024-11-20 17:52:48,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 215 flow [2024-11-20 17:52:48,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:52:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:52:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-11-20 17:52:48,180 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5885714285714285 [2024-11-20 17:52:48,180 INFO L175 Difference]: Start difference. First operand has 39 places, 28 transitions, 75 flow. Second operand 5 states and 103 transitions. [2024-11-20 17:52:48,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 215 flow [2024-11-20 17:52:48,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:52:48,181 INFO L231 Difference]: Finished difference. Result has 44 places, 30 transitions, 101 flow [2024-11-20 17:52:48,181 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=44, PETRI_TRANSITIONS=30} [2024-11-20 17:52:48,182 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 4 predicate places. [2024-11-20 17:52:48,182 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 30 transitions, 101 flow [2024-11-20 17:52:48,184 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) [2024-11-20 17:52:48,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:48,184 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:52:48,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:52:48,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:48,389 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:48,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:48,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1640172159, now seen corresponding path program 1 times [2024-11-20 17:52:48,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:48,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728494751] [2024-11-20 17:52:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:48,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:52:48,409 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:52:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:52:48,423 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:52:48,426 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:52:48,426 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-20 17:52:48,426 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (2 of 4 remaining) [2024-11-20 17:52:48,427 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 4 remaining) [2024-11-20 17:52:48,427 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-11-20 17:52:48,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:52:48,427 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-20 17:52:48,427 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:52:48,428 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-20 17:52:48,447 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:52:48,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 43 transitions, 122 flow [2024-11-20 17:52:48,453 INFO L124 PetriNetUnfolderBase]: 12/88 cut-off events. [2024-11-20 17:52:48,453 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-20 17:52:48,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 88 events. 12/88 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 208 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 85. Up to 8 conditions per place. [2024-11-20 17:52:48,453 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 43 transitions, 122 flow [2024-11-20 17:52:48,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 41 transitions, 115 flow [2024-11-20 17:52:48,455 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:52:48,455 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;@27e99349, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:52:48,455 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-20 17:52:48,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:52:48,457 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-20 17:52:48,457 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:52:48,457 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:48,457 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:52:48,457 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:48,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:48,458 INFO L85 PathProgramCache]: Analyzing trace with hash 671253657, now seen corresponding path program 1 times [2024-11-20 17:52:48,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:48,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842648734] [2024-11-20 17:52:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:48,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:48,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:48,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842648734] [2024-11-20 17:52:48,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842648734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:52:48,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:52:48,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:52:48,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284771725] [2024-11-20 17:52:48,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:52:48,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:52:48,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:48,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:52:48,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:52:48,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-20 17:52:48,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2024-11-20 17:52:48,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:48,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-20 17:52:48,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:48,687 INFO L124 PetriNetUnfolderBase]: 1804/2927 cut-off events. [2024-11-20 17:52:48,687 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2024-11-20 17:52:48,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5651 conditions, 2927 events. 1804/2927 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18321 event pairs, 1719 based on Foata normal form. 255/2845 useless extension candidates. Maximal degree in co-relation 2474. Up to 2482 conditions per place. [2024-11-20 17:52:48,702 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 19 selfloop transitions, 1 changer transitions 1/37 dead transitions. [2024-11-20 17:52:48,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 37 transitions, 149 flow [2024-11-20 17:52:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:52:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:52:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-11-20 17:52:48,704 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-11-20 17:52:48,704 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 115 flow. Second operand 3 states and 75 transitions. [2024-11-20 17:52:48,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 37 transitions, 149 flow [2024-11-20 17:52:48,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 37 transitions, 144 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-20 17:52:48,707 INFO L231 Difference]: Finished difference. Result has 51 places, 36 transitions, 102 flow [2024-11-20 17:52:48,707 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2024-11-20 17:52:48,709 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-11-20 17:52:48,710 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 102 flow [2024-11-20 17:52:48,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2024-11-20 17:52:48,710 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:48,710 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:52:48,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:52:48,711 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:48,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:48,711 INFO L85 PathProgramCache]: Analyzing trace with hash 671254296, now seen corresponding path program 1 times [2024-11-20 17:52:48,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:48,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124174002] [2024-11-20 17:52:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:48,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-20 17:52:48,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1008203530] [2024-11-20 17:52:48,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:48,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:48,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:52:48,724 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) [2024-11-20 17:52:48,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:52:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:48,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 17:52:48,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:52:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:48,785 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:52:48,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:48,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124174002] [2024-11-20 17:52:48,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-20 17:52:48,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008203530] [2024-11-20 17:52:48,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008203530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:52:48,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:52:48,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:52:48,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135909354] [2024-11-20 17:52:48,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:52:48,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:52:48,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:48,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:52:48,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:52:48,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 43 [2024-11-20 17:52:48,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:48,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:48,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 43 [2024-11-20 17:52:48,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:49,414 INFO L124 PetriNetUnfolderBase]: 6345/8523 cut-off events. [2024-11-20 17:52:49,415 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2024-11-20 17:52:49,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17429 conditions, 8523 events. 6345/8523 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 42833 event pairs, 3873 based on Foata normal form. 259/8234 useless extension candidates. Maximal degree in co-relation 17418. Up to 7365 conditions per place. [2024-11-20 17:52:49,450 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 35 selfloop transitions, 4 changer transitions 16/68 dead transitions. [2024-11-20 17:52:49,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 68 transitions, 298 flow [2024-11-20 17:52:49,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:52:49,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:52:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-20 17:52:49,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6139534883720931 [2024-11-20 17:52:49,451 INFO L175 Difference]: Start difference. First operand has 51 places, 36 transitions, 102 flow. Second operand 5 states and 132 transitions. [2024-11-20 17:52:49,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 68 transitions, 298 flow [2024-11-20 17:52:49,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 68 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:52:49,453 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 137 flow [2024-11-20 17:52:49,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2024-11-20 17:52:49,453 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2024-11-20 17:52:49,453 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 137 flow [2024-11-20 17:52:49,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:49,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:49,454 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:52:49,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-20 17:52:49,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:49,659 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:49,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1328448685, now seen corresponding path program 1 times [2024-11-20 17:52:49,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:49,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682004127] [2024-11-20 17:52:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:49,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:49,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:49,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682004127] [2024-11-20 17:52:49,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682004127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:52:49,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820581735] [2024-11-20 17:52:49,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:49,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:49,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:52:49,715 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:52:49,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:52:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:49,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 17:52:49,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:52:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:49,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:52:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:49,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820581735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:52:49,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:52:49,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-20 17:52:49,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739101593] [2024-11-20 17:52:49,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:52:49,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:52:49,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:49,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:52:49,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:52:49,811 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-20 17:52:49,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 137 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 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) [2024-11-20 17:52:49,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:49,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-20 17:52:49,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:50,257 INFO L124 PetriNetUnfolderBase]: 3536/5651 cut-off events. [2024-11-20 17:52:50,258 INFO L125 PetriNetUnfolderBase]: For 1228/1368 co-relation queries the response was YES. [2024-11-20 17:52:50,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12051 conditions, 5651 events. 3536/5651 cut-off events. For 1228/1368 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 39359 event pairs, 2825 based on Foata normal form. 156/5105 useless extension candidates. Maximal degree in co-relation 12036. Up to 3866 conditions per place. [2024-11-20 17:52:50,303 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 24 selfloop transitions, 4 changer transitions 2/49 dead transitions. [2024-11-20 17:52:50,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 217 flow [2024-11-20 17:52:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:52:50,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:52:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-11-20 17:52:50,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5627906976744186 [2024-11-20 17:52:50,307 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 137 flow. Second operand 5 states and 121 transitions. [2024-11-20 17:52:50,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 217 flow [2024-11-20 17:52:50,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 211 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-20 17:52:50,323 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 153 flow [2024-11-20 17:52:50,323 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2024-11-20 17:52:50,324 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 6 predicate places. [2024-11-20 17:52:50,324 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 153 flow [2024-11-20 17:52:50,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 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) [2024-11-20 17:52:50,324 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:50,325 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:52:50,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:52:50,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:50,529 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:50,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash -2050149900, now seen corresponding path program 1 times [2024-11-20 17:52:50,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:50,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522156269] [2024-11-20 17:52:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:50,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-20 17:52:50,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071723279] [2024-11-20 17:52:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:50,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:50,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:52:50,557 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:52:50,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:52:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:50,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-20 17:52:50,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:52:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:52:50,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:52:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:52:50,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:50,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522156269] [2024-11-20 17:52:50,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-20 17:52:50,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071723279] [2024-11-20 17:52:50,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071723279] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:52:50,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:52:50,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-11-20 17:52:50,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378822505] [2024-11-20 17:52:50,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:52:50,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:52:50,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:52:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-20 17:52:50,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-20 17:52:50,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2024-11-20 17:52:50,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:50,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-20 17:52:50,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:51,093 INFO L124 PetriNetUnfolderBase]: 2883/4393 cut-off events. [2024-11-20 17:52:51,093 INFO L125 PetriNetUnfolderBase]: For 916/1104 co-relation queries the response was YES. [2024-11-20 17:52:51,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10136 conditions, 4393 events. 2883/4393 cut-off events. For 916/1104 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 28636 event pairs, 1513 based on Foata normal form. 264/4092 useless extension candidates. Maximal degree in co-relation 10119. Up to 1892 conditions per place. [2024-11-20 17:52:51,116 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 25 selfloop transitions, 1 changer transitions 8/50 dead transitions. [2024-11-20 17:52:51,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 50 transitions, 235 flow [2024-11-20 17:52:51,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:52:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:52:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-20 17:52:51,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2024-11-20 17:52:51,118 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 153 flow. Second operand 4 states and 104 transitions. [2024-11-20 17:52:51,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 50 transitions, 235 flow [2024-11-20 17:52:51,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 50 transitions, 226 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-20 17:52:51,128 INFO L231 Difference]: Finished difference. Result has 56 places, 36 transitions, 130 flow [2024-11-20 17:52:51,128 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=56, PETRI_TRANSITIONS=36} [2024-11-20 17:52:51,128 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2024-11-20 17:52:51,128 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 36 transitions, 130 flow [2024-11-20 17:52:51,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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) [2024-11-20 17:52:51,129 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:51,129 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:52:51,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 17:52:51,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-20 17:52:51,334 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:51,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:51,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1627166722, now seen corresponding path program 1 times [2024-11-20 17:52:51,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:51,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969049990] [2024-11-20 17:52:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:51,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:52:51,343 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:52:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:52:51,350 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:52:51,350 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:52:51,351 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-20 17:52:51,351 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (2 of 4 remaining) [2024-11-20 17:52:51,351 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 4 remaining) [2024-11-20 17:52:51,351 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-11-20 17:52:51,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 17:52:51,351 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-20 17:52:51,352 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:52:51,352 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-20 17:52:51,367 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:52:51,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 51 transitions, 158 flow [2024-11-20 17:52:51,373 INFO L124 PetriNetUnfolderBase]: 15/112 cut-off events. [2024-11-20 17:52:51,373 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-20 17:52:51,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 112 events. 15/112 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 295 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 119. Up to 10 conditions per place. [2024-11-20 17:52:51,373 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 51 transitions, 158 flow [2024-11-20 17:52:51,374 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 64 places, 49 transitions, 150 flow [2024-11-20 17:52:51,375 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:52:51,375 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;@27e99349, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:52:51,375 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-20 17:52:51,376 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:52:51,376 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-20 17:52:51,376 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:52:51,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:51,376 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:52:51,377 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:51,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:51,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2114957383, now seen corresponding path program 1 times [2024-11-20 17:52:51,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:51,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732750964] [2024-11-20 17:52:51,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:51,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:51,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:51,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732750964] [2024-11-20 17:52:51,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732750964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:52:51,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:52:51,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:52:51,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069930212] [2024-11-20 17:52:51,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:52:51,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:52:51,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:51,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:52:51,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:52:51,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 51 [2024-11-20 17:52:51,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:51,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:51,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 51 [2024-11-20 17:52:51,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:52,399 INFO L124 PetriNetUnfolderBase]: 9932/14447 cut-off events. [2024-11-20 17:52:52,399 INFO L125 PetriNetUnfolderBase]: For 2844/2844 co-relation queries the response was YES. [2024-11-20 17:52:52,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28309 conditions, 14447 events. 9932/14447 cut-off events. For 2844/2844 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 94154 event pairs, 9591 based on Foata normal form. 1023/14108 useless extension candidates. Maximal degree in co-relation 12778. Up to 12658 conditions per place. [2024-11-20 17:52:52,497 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 23 selfloop transitions, 1 changer transitions 1/45 dead transitions. [2024-11-20 17:52:52,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 45 transitions, 192 flow [2024-11-20 17:52:52,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:52:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:52:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-11-20 17:52:52,499 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2024-11-20 17:52:52,499 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 150 flow. Second operand 3 states and 91 transitions. [2024-11-20 17:52:52,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 45 transitions, 192 flow [2024-11-20 17:52:52,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 45 transitions, 179 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-20 17:52:52,508 INFO L231 Difference]: Finished difference. Result has 63 places, 44 transitions, 129 flow [2024-11-20 17:52:52,508 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=63, PETRI_TRANSITIONS=44} [2024-11-20 17:52:52,509 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, -1 predicate places. [2024-11-20 17:52:52,510 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 44 transitions, 129 flow [2024-11-20 17:52:52,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:52,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:52,511 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:52:52,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 17:52:52,511 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:52,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:52,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2114956744, now seen corresponding path program 1 times [2024-11-20 17:52:52,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:52,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120206629] [2024-11-20 17:52:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:52,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-20 17:52:52,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980535064] [2024-11-20 17:52:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:52,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:52,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:52:52,522 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:52:52,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:52:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:52,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 17:52:52,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:52:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:52,710 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:52:52,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:52,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120206629] [2024-11-20 17:52:52,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-20 17:52:52,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980535064] [2024-11-20 17:52:52,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980535064] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:52:52,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:52:52,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:52:52,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318706958] [2024-11-20 17:52:52,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:52:52,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:52:52,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:52,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:52:52,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:52:52,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-11-20 17:52:52,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 44 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:52,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:52,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-11-20 17:52:52,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:56,270 INFO L124 PetriNetUnfolderBase]: 52825/65437 cut-off events. [2024-11-20 17:52:56,270 INFO L125 PetriNetUnfolderBase]: For 1850/1850 co-relation queries the response was YES. [2024-11-20 17:52:56,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133753 conditions, 65437 events. 52825/65437 cut-off events. For 1850/1850 co-relation queries the response was YES. Maximal size of possible extension queue 2931. Compared 331481 event pairs, 36233 based on Foata normal form. 1555/63816 useless extension candidates. Maximal degree in co-relation 133740. Up to 57877 conditions per place. [2024-11-20 17:52:56,730 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 43 selfloop transitions, 5 changer transitions 21/85 dead transitions. [2024-11-20 17:52:56,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 85 transitions, 381 flow [2024-11-20 17:52:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:52:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:52:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-11-20 17:52:56,731 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6313725490196078 [2024-11-20 17:52:56,731 INFO L175 Difference]: Start difference. First operand has 63 places, 44 transitions, 129 flow. Second operand 5 states and 161 transitions. [2024-11-20 17:52:56,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 85 transitions, 381 flow [2024-11-20 17:52:56,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 85 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:52:56,733 INFO L231 Difference]: Finished difference. Result has 68 places, 48 transitions, 173 flow [2024-11-20 17:52:56,733 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=68, PETRI_TRANSITIONS=48} [2024-11-20 17:52:56,733 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 4 predicate places. [2024-11-20 17:52:56,733 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 48 transitions, 173 flow [2024-11-20 17:52:56,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:52:56,733 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:52:56,733 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:52:56,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 17:52:56,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:56,938 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:52:56,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:52:56,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1076071401, now seen corresponding path program 1 times [2024-11-20 17:52:56,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:52:56,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441849458] [2024-11-20 17:52:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:56,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:52:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:56,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:52:56,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441849458] [2024-11-20 17:52:56,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441849458] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:52:56,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327015501] [2024-11-20 17:52:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:52:56,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:52:56,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:52:56,994 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:52:56,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:52:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:52:57,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 17:52:57,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:52:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:57,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:52:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:52:57,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327015501] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:52:57,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:52:57,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-20 17:52:57,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641940657] [2024-11-20 17:52:57,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:52:57,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:52:57,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:52:57,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:52:57,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:52:57,090 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 51 [2024-11-20 17:52:57,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 173 flow. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 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) [2024-11-20 17:52:57,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:52:57,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 51 [2024-11-20 17:52:57,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:52:59,794 INFO L124 PetriNetUnfolderBase]: 27624/39291 cut-off events. [2024-11-20 17:52:59,794 INFO L125 PetriNetUnfolderBase]: For 10206/12488 co-relation queries the response was YES. [2024-11-20 17:52:59,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85517 conditions, 39291 events. 27624/39291 cut-off events. For 10206/12488 co-relation queries the response was YES. Maximal size of possible extension queue 2394. Compared 290263 event pairs, 22409 based on Foata normal form. 1024/35116 useless extension candidates. Maximal degree in co-relation 85500. Up to 27474 conditions per place. [2024-11-20 17:53:00,104 INFO L140 encePairwiseOnDemand]: 46/51 looper letters, 30 selfloop transitions, 4 changer transitions 2/60 dead transitions. [2024-11-20 17:53:00,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 60 transitions, 269 flow [2024-11-20 17:53:00,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:53:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:53:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-11-20 17:53:00,105 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5764705882352941 [2024-11-20 17:53:00,105 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 173 flow. Second operand 5 states and 147 transitions. [2024-11-20 17:53:00,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 60 transitions, 269 flow [2024-11-20 17:53:00,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 60 transitions, 262 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-20 17:53:00,264 INFO L231 Difference]: Finished difference. Result has 70 places, 50 transitions, 188 flow [2024-11-20 17:53:00,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=70, PETRI_TRANSITIONS=50} [2024-11-20 17:53:00,265 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 6 predicate places. [2024-11-20 17:53:00,265 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 50 transitions, 188 flow [2024-11-20 17:53:00,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 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) [2024-11-20 17:53:00,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:53:00,265 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:53:00,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 17:53:00,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:53:00,466 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:53:00,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:53:00,466 INFO L85 PathProgramCache]: Analyzing trace with hash -695222809, now seen corresponding path program 1 times [2024-11-20 17:53:00,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:53:00,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957220658] [2024-11-20 17:53:00,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:53:00,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:53:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-20 17:53:00,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206328523] [2024-11-20 17:53:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:53:00,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:53:00,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:53:00,486 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:53:00,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:53:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:53:00,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-20 17:53:00,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:53:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:53:00,571 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:53:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:53:00,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:53:00,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957220658] [2024-11-20 17:53:00,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-20 17:53:00,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206328523] [2024-11-20 17:53:00,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206328523] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:53:00,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:53:00,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2024-11-20 17:53:00,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443346570] [2024-11-20 17:53:00,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:53:00,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:53:00,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:53:00,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:53:00,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-20 17:53:00,614 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 51 [2024-11-20 17:53:00,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 50 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 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) [2024-11-20 17:53:00,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:53:00,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 51 [2024-11-20 17:53:00,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:53:03,081 INFO L124 PetriNetUnfolderBase]: 23051/31665 cut-off events. [2024-11-20 17:53:03,081 INFO L125 PetriNetUnfolderBase]: For 8458/11502 co-relation queries the response was YES. [2024-11-20 17:53:03,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72682 conditions, 31665 events. 23051/31665 cut-off events. For 8458/11502 co-relation queries the response was YES. Maximal size of possible extension queue 2091. Compared 219360 event pairs, 13017 based on Foata normal form. 1756/29015 useless extension candidates. Maximal degree in co-relation 72663. Up to 14300 conditions per place. [2024-11-20 17:53:03,255 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 31 selfloop transitions, 1 changer transitions 10/63 dead transitions. [2024-11-20 17:53:03,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 294 flow [2024-11-20 17:53:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:53:03,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:53:03,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-11-20 17:53:03,257 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-11-20 17:53:03,257 INFO L175 Difference]: Start difference. First operand has 70 places, 50 transitions, 188 flow. Second operand 4 states and 128 transitions. [2024-11-20 17:53:03,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 63 transitions, 294 flow [2024-11-20 17:53:03,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 63 transitions, 283 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-20 17:53:03,413 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 163 flow [2024-11-20 17:53:03,413 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2024-11-20 17:53:03,413 INFO L277 CegarLoopForPetriNet]: 64 programPoint places, 4 predicate places. [2024-11-20 17:53:03,413 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 163 flow [2024-11-20 17:53:03,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 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) [2024-11-20 17:53:03,414 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:53:03,414 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:53:03,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 17:53:03,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-20 17:53:03,614 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:53:03,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:53:03,615 INFO L85 PathProgramCache]: Analyzing trace with hash 355549737, now seen corresponding path program 1 times [2024-11-20 17:53:03,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:53:03,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260665558] [2024-11-20 17:53:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:53:03,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:53:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:53:03,623 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-20 17:53:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-20 17:53:03,633 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-20 17:53:03,634 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-20 17:53:03,634 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-11-20 17:53:03,634 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (2 of 4 remaining) [2024-11-20 17:53:03,634 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 4 remaining) [2024-11-20 17:53:03,634 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-11-20 17:53:03,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-20 17:53:03,635 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-20 17:53:03,635 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-20 17:53:03,635 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-20 17:53:03,657 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 17:53:03,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 59 transitions, 198 flow [2024-11-20 17:53:03,665 INFO L124 PetriNetUnfolderBase]: 18/136 cut-off events. [2024-11-20 17:53:03,665 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-20 17:53:03,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 136 events. 18/136 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 350 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 155. Up to 12 conditions per place. [2024-11-20 17:53:03,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 59 transitions, 198 flow [2024-11-20 17:53:03,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 57 transitions, 189 flow [2024-11-20 17:53:03,667 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:53:03,667 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;@27e99349, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:53:03,667 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-20 17:53:03,668 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:53:03,669 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-20 17:53:03,669 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:53:03,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:53:03,669 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:53:03,669 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:53:03,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:53:03,669 INFO L85 PathProgramCache]: Analyzing trace with hash -369533479, now seen corresponding path program 1 times [2024-11-20 17:53:03,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:53:03,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093861439] [2024-11-20 17:53:03,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:53:03,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:53:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:53:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:53:03,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:53:03,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093861439] [2024-11-20 17:53:03,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093861439] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:53:03,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:53:03,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:53:03,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752667259] [2024-11-20 17:53:03,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:53:03,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:53:03,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:53:03,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:53:03,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:53:03,691 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-11-20 17:53:03,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 57 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:53:03,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:53:03,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-11-20 17:53:03,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:53:08,350 INFO L124 PetriNetUnfolderBase]: 50636/68719 cut-off events. [2024-11-20 17:53:08,350 INFO L125 PetriNetUnfolderBase]: For 19228/19228 co-relation queries the response was YES. [2024-11-20 17:53:08,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136087 conditions, 68719 events. 50636/68719 cut-off events. For 19228/19228 co-relation queries the response was YES. Maximal size of possible extension queue 2679. Compared 456401 event pairs, 49271 based on Foata normal form. 4095/67357 useless extension candidates. Maximal degree in co-relation 62570. Up to 61554 conditions per place. [2024-11-20 17:53:08,780 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 27 selfloop transitions, 1 changer transitions 1/53 dead transitions. [2024-11-20 17:53:08,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 53 transitions, 239 flow [2024-11-20 17:53:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:53:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:53:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-11-20 17:53:08,785 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6045197740112994 [2024-11-20 17:53:08,785 INFO L175 Difference]: Start difference. First operand has 76 places, 57 transitions, 189 flow. Second operand 3 states and 107 transitions. [2024-11-20 17:53:08,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 53 transitions, 239 flow [2024-11-20 17:53:08,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 53 transitions, 214 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-20 17:53:08,848 INFO L231 Difference]: Finished difference. Result has 75 places, 52 transitions, 156 flow [2024-11-20 17:53:08,849 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=52} [2024-11-20 17:53:08,849 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, -1 predicate places. [2024-11-20 17:53:08,849 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 52 transitions, 156 flow [2024-11-20 17:53:08,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:53:08,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:53:08,849 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:53:08,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 17:53:08,850 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 17:53:08,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:53:08,850 INFO L85 PathProgramCache]: Analyzing trace with hash -369532840, now seen corresponding path program 1 times [2024-11-20 17:53:08,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:53:08,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233345829] [2024-11-20 17:53:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:53:08,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:53:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-20 17:53:08,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542466997] [2024-11-20 17:53:08,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:53:08,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:53:08,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:53:08,857 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:53:08,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:53:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:53:08,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-20 17:53:08,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:53:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:53:08,924 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:53:08,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:53:08,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233345829] [2024-11-20 17:53:08,924 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-20 17:53:08,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542466997] [2024-11-20 17:53:08,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542466997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:53:08,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:53:08,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:53:08,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076044936] [2024-11-20 17:53:08,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:53:08,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:53:08,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:53:08,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:53:08,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:53:08,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 59 [2024-11-20 17:53:08,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 52 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2024-11-20 17:53:08,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:53:08,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 59 [2024-11-20 17:53:08,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand