./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/fib_unsafe-7.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-7.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 7399a2144dae504b22d3bd9a68ebd91d200de1e145cd9c7db720353ffec7d306 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:24:20,724 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:24:20,794 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:24:20,798 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:24:20,799 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:24:20,822 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:24:20,823 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:24:20,823 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:24:20,824 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:24:20,824 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:24:20,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:24:20,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:24:20,826 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:24:20,826 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:24:20,827 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:24:20,827 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:24:20,827 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:24:20,828 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:24:20,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:24:20,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:24:20,829 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:24:20,830 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:24:20,830 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:24:20,830 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:24:20,831 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:24:20,831 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:24:20,831 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:24:20,832 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:24:20,832 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:24:20,833 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:24:20,833 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:24:20,833 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:24:20,834 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:24:20,834 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:24:20,835 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:24:20,835 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:24:20,835 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:24:20,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:24:20,836 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:24:20,836 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:24:20,836 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:24:20,839 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:24:20,840 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7399a2144dae504b22d3bd9a68ebd91d200de1e145cd9c7db720353ffec7d306 [2024-10-11 19:24:21,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:24:21,122 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:24:21,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:24:21,126 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:24:21,126 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:24:21,128 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-7.i [2024-10-11 19:24:22,536 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:24:22,801 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:24:22,801 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-7.i [2024-10-11 19:24:22,818 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/ec106575a/4091ca46c6bb4c9a9bb825b58d839e2a/FLAGfff77e619 [2024-10-11 19:24:22,832 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/ec106575a/4091ca46c6bb4c9a9bb825b58d839e2a [2024-10-11 19:24:22,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:24:22,836 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:24:22,837 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:24:22,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:24:22,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:24:22,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:24:22" (1/1) ... [2024-10-11 19:24:22,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@213c9718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:22, skipping insertion in model container [2024-10-11 19:24:22,843 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:24:22" (1/1) ... [2024-10-11 19:24:22,885 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:24:23,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:24:23,245 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:24:23,286 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:24:23,326 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:24:23,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23 WrapperNode [2024-10-11 19:24:23,327 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:24:23,328 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:24:23,328 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:24:23,328 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:24:23,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (1/1) ... [2024-10-11 19:24:23,349 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (1/1) ... [2024-10-11 19:24:23,372 INFO L138 Inliner]: procedures = 164, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 68 [2024-10-11 19:24:23,373 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:24:23,375 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:24:23,375 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:24:23,376 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:24:23,385 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (1/1) ... [2024-10-11 19:24:23,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (1/1) ... [2024-10-11 19:24:23,388 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (1/1) ... [2024-10-11 19:24:23,407 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-11 19:24:23,408 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (1/1) ... [2024-10-11 19:24:23,408 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (1/1) ... [2024-10-11 19:24:23,413 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (1/1) ... [2024-10-11 19:24:23,420 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (1/1) ... [2024-10-11 19:24:23,424 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (1/1) ... [2024-10-11 19:24:23,425 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (1/1) ... [2024-10-11 19:24:23,431 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:24:23,432 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:24:23,435 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:24:23,436 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:24:23,437 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (1/1) ... [2024-10-11 19:24:23,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:24:23,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:24:23,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:24:23,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:24:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-11 19:24:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-11 19:24:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-11 19:24:23,531 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-11 19:24:23,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 19:24:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:24:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:24:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 19:24:23,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:24:23,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:24:23,534 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:24:23,679 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:24:23,682 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:24:23,857 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:24:23,857 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:24:24,001 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:24:24,001 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 19:24:24,001 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:24:24 BoogieIcfgContainer [2024-10-11 19:24:24,002 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:24:24,004 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:24:24,004 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:24:24,011 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:24:24,011 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:24:22" (1/3) ... [2024-10-11 19:24:24,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8a4b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:24:24, skipping insertion in model container [2024-10-11 19:24:24,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:23" (2/3) ... [2024-10-11 19:24:24,012 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8a4b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:24:24, skipping insertion in model container [2024-10-11 19:24:24,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:24:24" (3/3) ... [2024-10-11 19:24:24,014 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2024-10-11 19:24:24,030 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:24:24,031 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-11 19:24:24,031 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:24:24,076 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:24:24,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 76 flow [2024-10-11 19:24:24,144 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-10-11 19:24:24,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:24:24,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 32 events. 5/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 37 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-10-11 19:24:24,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 76 flow [2024-10-11 19:24:24,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 32 transitions, 70 flow [2024-10-11 19:24:24,165 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:24:24,172 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;@4e58ec21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:24:24,174 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 19:24:24,190 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:24:24,194 INFO L124 PetriNetUnfolderBase]: 5/29 cut-off events. [2024-10-11 19:24:24,194 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:24:24,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:24,195 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:24,196 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)] === [2024-10-11 19:24:24,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:24,202 INFO L85 PathProgramCache]: Analyzing trace with hash 563650960, now seen corresponding path program 1 times [2024-10-11 19:24:24,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:24,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793516560] [2024-10-11 19:24:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:24,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:24,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:24,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793516560] [2024-10-11 19:24:24,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793516560] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:24,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:24,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:24:24,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74417547] [2024-10-11 19:24:24,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:24,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:24:24,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:24,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:24:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:24:24,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 34 [2024-10-11 19:24:24,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:24,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:24,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 34 [2024-10-11 19:24:24,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:24,706 INFO L124 PetriNetUnfolderBase]: 151/292 cut-off events. [2024-10-11 19:24:24,706 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 19:24:24,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 292 events. 151/292 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 993 event pairs, 20 based on Foata normal form. 18/296 useless extension candidates. Maximal degree in co-relation 521. Up to 172 conditions per place. [2024-10-11 19:24:24,713 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 22 selfloop transitions, 2 changer transitions 1/36 dead transitions. [2024-10-11 19:24:24,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 36 transitions, 128 flow [2024-10-11 19:24:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:24:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:24:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-10-11 19:24:24,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-10-11 19:24:24,727 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 67 transitions. [2024-10-11 19:24:24,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 36 transitions, 128 flow [2024-10-11 19:24:24,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:24:24,734 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 72 flow [2024-10-11 19:24:24,737 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2024-10-11 19:24:24,741 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2024-10-11 19:24:24,741 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 72 flow [2024-10-11 19:24:24,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:24,742 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:24,742 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:24,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:24:24,742 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 19:24:24,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:24,743 INFO L85 PathProgramCache]: Analyzing trace with hash -488978942, now seen corresponding path program 1 times [2024-10-11 19:24:24,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:24,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2852186] [2024-10-11 19:24:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:24,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:24,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:24,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2852186] [2024-10-11 19:24:24,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2852186] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:24:24,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160768110] [2024-10-11 19:24:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:24,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:24:24,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:24:24,902 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:24:24,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:24:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:25,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-11 19:24:25,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:24:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:24:25,052 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:24:25,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160768110] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:25,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 19:24:25,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-10-11 19:24:25,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791557516] [2024-10-11 19:24:25,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:25,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:24:25,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:25,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:24:25,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:24:25,058 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 34 [2024-10-11 19:24:25,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:25,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:25,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 34 [2024-10-11 19:24:25,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:25,141 INFO L124 PetriNetUnfolderBase]: 133/256 cut-off events. [2024-10-11 19:24:25,141 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-11 19:24:25,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509 conditions, 256 events. 133/256 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 816 event pairs, 80 based on Foata normal form. 9/248 useless extension candidates. Maximal degree in co-relation 494. Up to 204 conditions per place. [2024-10-11 19:24:25,144 INFO L140 encePairwiseOnDemand]: 32/34 looper letters, 16 selfloop transitions, 1 changer transitions 1/28 dead transitions. [2024-10-11 19:24:25,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 106 flow [2024-10-11 19:24:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:24:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:24:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-10-11 19:24:25,146 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2024-10-11 19:24:25,146 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 72 flow. Second operand 3 states and 54 transitions. [2024-10-11 19:24:25,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 106 flow [2024-10-11 19:24:25,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:24:25,147 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 68 flow [2024-10-11 19:24:25,147 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-10-11 19:24:25,148 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, -1 predicate places. [2024-10-11 19:24:25,149 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 68 flow [2024-10-11 19:24:25,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:25,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:25,151 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:25,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 19:24:25,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:24:25,352 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)] === [2024-10-11 19:24:25,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:25,353 INFO L85 PathProgramCache]: Analyzing trace with hash -488977835, now seen corresponding path program 1 times [2024-10-11 19:24:25,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:25,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731917268] [2024-10-11 19:24:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:25,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:25,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731917268] [2024-10-11 19:24:25,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731917268] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:24:25,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811700883] [2024-10-11 19:24:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:25,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:24:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:24:25,431 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:24:25,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 19:24:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:25,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:24:25,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:24:25,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:25,557 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:24:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:25,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811700883] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:24:25,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:24:25,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-11 19:24:25,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173542] [2024-10-11 19:24:25,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:24:25,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 19:24:25,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 19:24:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 19:24:25,583 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 34 [2024-10-11 19:24:25,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 68 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:25,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:25,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 34 [2024-10-11 19:24:25,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:25,770 INFO L124 PetriNetUnfolderBase]: 169/310 cut-off events. [2024-10-11 19:24:25,771 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-11 19:24:25,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 310 events. 169/310 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 926 event pairs, 20 based on Foata normal form. 0/299 useless extension candidates. Maximal degree in co-relation 628. Up to 118 conditions per place. [2024-10-11 19:24:25,777 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 39 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-10-11 19:24:25,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 54 transitions, 216 flow [2024-10-11 19:24:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:24:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:24:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-10-11 19:24:25,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6127450980392157 [2024-10-11 19:24:25,781 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 68 flow. Second operand 6 states and 125 transitions. [2024-10-11 19:24:25,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 54 transitions, 216 flow [2024-10-11 19:24:25,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:24:25,785 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 103 flow [2024-10-11 19:24:25,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2024-10-11 19:24:25,786 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2024-10-11 19:24:25,786 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 103 flow [2024-10-11 19:24:25,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:25,787 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:25,787 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:25,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 19:24:25,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:24:25,991 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)] === [2024-10-11 19:24:25,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:25,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1932997219, now seen corresponding path program 2 times [2024-10-11 19:24:25,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:25,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544573582] [2024-10-11 19:24:25,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:25,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:26,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:26,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544573582] [2024-10-11 19:24:26,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544573582] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:24:26,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546756966] [2024-10-11 19:24:26,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:24:26,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:24:26,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:24:26,146 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:24:26,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 19:24:26,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:24:26,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:24:26,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:24:26,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:24:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:26,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:24:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:26,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546756966] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:24:26,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:24:26,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-10-11 19:24:26,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017740226] [2024-10-11 19:24:26,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:24:26,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 19:24:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:26,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 19:24:26,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-11 19:24:26,315 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 34 [2024-10-11 19:24:26,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 103 flow. Second operand has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 13 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:26,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:26,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 34 [2024-10-11 19:24:26,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:26,477 INFO L124 PetriNetUnfolderBase]: 277/472 cut-off events. [2024-10-11 19:24:26,477 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2024-10-11 19:24:26,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 472 events. 277/472 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1325 event pairs, 20 based on Foata normal form. 54/524 useless extension candidates. Maximal degree in co-relation 1159. Up to 118 conditions per place. [2024-10-11 19:24:26,481 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 75 selfloop transitions, 11 changer transitions 0/96 dead transitions. [2024-10-11 19:24:26,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 96 transitions, 431 flow [2024-10-11 19:24:26,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:24:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:24:26,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-10-11 19:24:26,484 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-10-11 19:24:26,484 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 103 flow. Second operand 12 states and 248 transitions. [2024-10-11 19:24:26,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 96 transitions, 431 flow [2024-10-11 19:24:26,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 96 transitions, 417 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 19:24:26,489 INFO L231 Difference]: Finished difference. Result has 55 places, 36 transitions, 173 flow [2024-10-11 19:24:26,489 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=36} [2024-10-11 19:24:26,490 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2024-10-11 19:24:26,490 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 36 transitions, 173 flow [2024-10-11 19:24:26,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.615384615384615) internal successors, (190), 13 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:26,491 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:26,491 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:26,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 19:24:26,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:24:26,692 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 19:24:26,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:26,693 INFO L85 PathProgramCache]: Analyzing trace with hash 749587747, now seen corresponding path program 3 times [2024-10-11 19:24:26,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:26,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346113225] [2024-10-11 19:24:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:26,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:26,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:26,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:26,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346113225] [2024-10-11 19:24:26,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346113225] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:24:26,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535584630] [2024-10-11 19:24:26,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:24:26,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:24:26,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:24:26,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:24:26,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 19:24:27,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-10-11 19:24:27,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:24:27,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:24:27,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:24:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:27,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:24:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:27,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535584630] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:24:27,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:24:27,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2024-10-11 19:24:27,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967008802] [2024-10-11 19:24:27,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:24:27,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 19:24:27,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:27,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 19:24:27,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2024-10-11 19:24:27,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 34 [2024-10-11 19:24:27,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 36 transitions, 173 flow. Second operand has 19 states, 19 states have (on average 14.473684210526315) internal successors, (275), 19 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:27,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:27,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 34 [2024-10-11 19:24:27,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:27,468 INFO L124 PetriNetUnfolderBase]: 385/634 cut-off events. [2024-10-11 19:24:27,468 INFO L125 PetriNetUnfolderBase]: For 2268/2268 co-relation queries the response was YES. [2024-10-11 19:24:27,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 634 events. 385/634 cut-off events. For 2268/2268 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1724 event pairs, 20 based on Foata normal form. 54/686 useless extension candidates. Maximal degree in co-relation 1798. Up to 136 conditions per place. [2024-10-11 19:24:27,475 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 111 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-10-11 19:24:27,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 138 transitions, 669 flow [2024-10-11 19:24:27,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 19:24:27,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-11 19:24:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 368 transitions. [2024-10-11 19:24:27,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6013071895424836 [2024-10-11 19:24:27,480 INFO L175 Difference]: Start difference. First operand has 55 places, 36 transitions, 173 flow. Second operand 18 states and 368 transitions. [2024-10-11 19:24:27,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 138 transitions, 669 flow [2024-10-11 19:24:27,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 138 transitions, 609 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-10-11 19:24:27,493 INFO L231 Difference]: Finished difference. Result has 73 places, 42 transitions, 221 flow [2024-10-11 19:24:27,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=221, PETRI_PLACES=73, PETRI_TRANSITIONS=42} [2024-10-11 19:24:27,494 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2024-10-11 19:24:27,495 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 42 transitions, 221 flow [2024-10-11 19:24:27,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.473684210526315) internal successors, (275), 19 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:27,496 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:27,496 INFO L204 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:27,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 19:24:27,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:24:27,701 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 19:24:27,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1577756701, now seen corresponding path program 4 times [2024-10-11 19:24:27,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:27,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574379914] [2024-10-11 19:24:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:27,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:28,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:28,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574379914] [2024-10-11 19:24:28,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574379914] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:24:28,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634870241] [2024-10-11 19:24:28,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 19:24:28,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:24:28,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:24:28,965 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:24:28,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 19:24:29,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 19:24:29,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:24:29,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-11 19:24:29,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:24:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:30,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:24:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:31,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634870241] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:24:31,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:24:31,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 66 [2024-10-11 19:24:31,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693971696] [2024-10-11 19:24:31,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:24:31,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-10-11 19:24:31,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-10-11 19:24:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=3817, Unknown=0, NotChecked=0, Total=4422 [2024-10-11 19:24:31,807 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-11 19:24:31,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 42 transitions, 221 flow. Second operand has 67 states, 67 states have (on average 8.253731343283581) internal successors, (553), 67 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:31,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:31,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-11 19:24:31,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:54,599 INFO L124 PetriNetUnfolderBase]: 18955/31219 cut-off events. [2024-10-11 19:24:54,599 INFO L125 PetriNetUnfolderBase]: For 79708/79708 co-relation queries the response was YES. [2024-10-11 19:24:54,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84496 conditions, 31219 events. 18955/31219 cut-off events. For 79708/79708 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 206557 event pairs, 258 based on Foata normal form. 0/30852 useless extension candidates. Maximal degree in co-relation 84471. Up to 3960 conditions per place. [2024-10-11 19:24:54,852 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 643 selfloop transitions, 721 changer transitions 789/2157 dead transitions. [2024-10-11 19:24:54,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 2157 transitions, 13376 flow [2024-10-11 19:24:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2024-10-11 19:24:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2024-10-11 19:24:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 3025 transitions. [2024-10-11 19:24:54,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4516273514481935 [2024-10-11 19:24:54,868 INFO L175 Difference]: Start difference. First operand has 73 places, 42 transitions, 221 flow. Second operand 197 states and 3025 transitions. [2024-10-11 19:24:54,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 2157 transitions, 13376 flow [2024-10-11 19:24:55,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 2157 transitions, 11210 flow, removed 722 selfloop flow, removed 11 redundant places. [2024-10-11 19:24:55,093 INFO L231 Difference]: Finished difference. Result has 336 places, 823 transitions, 4971 flow [2024-10-11 19:24:55,093 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=197, PETRI_FLOW=4971, PETRI_PLACES=336, PETRI_TRANSITIONS=823} [2024-10-11 19:24:55,094 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 302 predicate places. [2024-10-11 19:24:55,094 INFO L471 AbstractCegarLoop]: Abstraction has has 336 places, 823 transitions, 4971 flow [2024-10-11 19:24:55,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 8.253731343283581) internal successors, (553), 67 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:55,095 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:55,095 INFO L204 CegarLoopForPetriNet]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:55,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 19:24:55,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:24:55,302 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-11 19:24:55,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:55,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1898895103, now seen corresponding path program 1 times [2024-10-11 19:24:55,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:55,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222281952] [2024-10-11 19:24:55,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:55,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:56,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:56,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222281952] [2024-10-11 19:24:56,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222281952] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:24:56,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682177014] [2024-10-11 19:24:56,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:56,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:24:56,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:24:56,559 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:24:56,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 19:24:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:56,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-10-11 19:24:56,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:24:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 105 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:57,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:24:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:58,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682177014] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:24:58,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:24:58,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2024-10-11 19:24:58,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983149121] [2024-10-11 19:24:58,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:24:58,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-10-11 19:24:58,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:58,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-10-11 19:24:58,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=4750, Unknown=0, NotChecked=0, Total=5402 [2024-10-11 19:24:59,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-11 19:24:59,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 823 transitions, 4971 flow. Second operand has 74 states, 74 states have (on average 8.297297297297296) internal successors, (614), 74 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:59,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:59,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-11 19:24:59,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand