./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --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/weaver/popl20-more-min-array.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:46:57,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:46:58,005 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:46:58,012 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:46:58,012 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:46:58,032 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:46:58,033 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:46:58,033 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:46:58,033 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:46:58,034 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:46:58,034 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:46:58,034 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:46:58,035 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:46:58,035 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:46:58,037 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:46:58,037 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:46:58,038 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:46:58,041 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:46:58,042 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:46:58,042 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:46:58,042 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:46:58,042 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:46:58,044 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:46:58,044 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:46:58,044 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:46:58,044 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:46:58,045 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:46:58,045 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:46:58,045 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:46:58,045 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:46:58,046 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:46:58,046 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:46:58,046 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:46:58,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:46:58,047 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:46:58,047 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:46:58,047 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:46:58,048 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:46:58,049 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:46:58,049 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:46:58,049 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:46:58,049 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:46:58,050 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 [2024-11-20 17:46:58,321 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:46:58,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:46:58,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:46:58,350 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:46:58,351 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:46:58,352 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2024-11-20 17:46:59,756 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:46:59,962 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:46:59,963 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2024-11-20 17:46:59,974 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062d34caf/3c9b9cf5bfd649238c274d43908b7c71/FLAG02d7bc858 [2024-11-20 17:46:59,993 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/062d34caf/3c9b9cf5bfd649238c274d43908b7c71 [2024-11-20 17:46:59,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:46:59,997 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:47:00,001 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:47:00,002 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:47:00,008 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:47:00,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f9c6a2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00, skipping insertion in model container [2024-11-20 17:47:00,012 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:46:59" (1/1) ... [2024-11-20 17:47:00,039 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:47:00,334 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:47:00,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:47:00,346 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:47:00,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:47:00,399 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:47:00,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00 WrapperNode [2024-11-20 17:47:00,400 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:47:00,401 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:47:00,401 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:47:00,402 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:47:00,408 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (1/1) ... [2024-11-20 17:47:00,416 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (1/1) ... [2024-11-20 17:47:00,444 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 88 [2024-11-20 17:47:00,445 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:47:00,445 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:47:00,445 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:47:00,446 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:47:00,457 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (1/1) ... [2024-11-20 17:47:00,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (1/1) ... [2024-11-20 17:47:00,460 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (1/1) ... [2024-11-20 17:47:00,482 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-20 17:47:00,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (1/1) ... [2024-11-20 17:47:00,483 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (1/1) ... [2024-11-20 17:47:00,490 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (1/1) ... [2024-11-20 17:47:00,493 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (1/1) ... [2024-11-20 17:47:00,494 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (1/1) ... [2024-11-20 17:47:00,495 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (1/1) ... [2024-11-20 17:47:00,498 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:47:00,499 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:47:00,499 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:47:00,499 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:47:00,500 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (1/1) ... [2024-11-20 17:47:00,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:47:00,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:00,540 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 17:47:00,544 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 17:47:00,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:47:00,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:47:00,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:47:00,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:47:00,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:47:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 17:47:00,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 17:47:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:47:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:47:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:47:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:47:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 17:47:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 17:47:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:47:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:47:00,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:47:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:47:00,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:47:00,593 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 17:47:00,715 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:47:00,717 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:47:01,028 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:47:01,029 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:47:01,271 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:47:01,272 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 17:47:01,272 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:47:01 BoogieIcfgContainer [2024-11-20 17:47:01,273 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:47:01,275 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:47:01,276 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:47:01,279 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:47:01,279 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:46:59" (1/3) ... [2024-11-20 17:47:01,280 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7300af50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:47:01, skipping insertion in model container [2024-11-20 17:47:01,280 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:00" (2/3) ... [2024-11-20 17:47:01,281 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7300af50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:47:01, skipping insertion in model container [2024-11-20 17:47:01,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:47:01" (3/3) ... [2024-11-20 17:47:01,282 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2024-11-20 17:47:01,296 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:47:01,297 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-20 17:47:01,297 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:47:01,404 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:47:01,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 121 flow [2024-11-20 17:47:01,479 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-11-20 17:47:01,481 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:47:01,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 4/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 103 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-20 17:47:01,486 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 121 flow [2024-11-20 17:47:01,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 110 flow [2024-11-20 17:47:01,504 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:47:01,514 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;@4b41c23a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:47:01,515 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-20 17:47:01,520 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:47:01,521 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:47:01,521 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:47:01,521 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:01,522 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:47:01,522 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:01,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:01,528 INFO L85 PathProgramCache]: Analyzing trace with hash 492868, now seen corresponding path program 1 times [2024-11-20 17:47:01,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:01,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412193801] [2024-11-20 17:47:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:01,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:01,818 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 17:47:01,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:01,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412193801] [2024-11-20 17:47:01,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412193801] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:01,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:01,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:47:01,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036296293] [2024-11-20 17:47:01,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:01,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:47:01,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:01,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:47:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:47:01,876 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:01,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 17:47:01,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:01,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:01,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:02,288 INFO L124 PetriNetUnfolderBase]: 1316/1930 cut-off events. [2024-11-20 17:47:02,289 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-20 17:47:02,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1930 events. 1316/1930 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9858 event pairs, 1060 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 3637. Up to 1877 conditions per place. [2024-11-20 17:47:02,325 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-20 17:47:02,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-11-20 17:47:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:47:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:47:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-20 17:47:02,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-11-20 17:47:02,354 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 110 flow. Second operand 3 states and 67 transitions. [2024-11-20 17:47:02,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-11-20 17:47:02,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:02,366 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-11-20 17:47:02,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-20 17:47:02,373 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -13 predicate places. [2024-11-20 17:47:02,373 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-11-20 17:47:02,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 17:47:02,374 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:02,374 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:47:02,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:47:02,374 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:02,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:02,375 INFO L85 PathProgramCache]: Analyzing trace with hash 492869, now seen corresponding path program 1 times [2024-11-20 17:47:02,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:02,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606702009] [2024-11-20 17:47:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:02,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:02,710 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 17:47:02,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:02,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606702009] [2024-11-20 17:47:02,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606702009] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:02,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:02,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:47:02,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634422769] [2024-11-20 17:47:02,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:02,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:47:02,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:47:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:47:02,726 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:02,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 17:47:02,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:02,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:02,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:02,995 INFO L124 PetriNetUnfolderBase]: 1317/1933 cut-off events. [2024-11-20 17:47:02,995 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:47:02,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 1933 events. 1317/1933 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9817 event pairs, 1060 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 3843. Up to 1882 conditions per place. [2024-11-20 17:47:03,007 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-20 17:47:03,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-11-20 17:47:03,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:47:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:47:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-20 17:47:03,011 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-11-20 17:47:03,011 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-11-20 17:47:03,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-11-20 17:47:03,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:03,014 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-11-20 17:47:03,015 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-20 17:47:03,016 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-20 17:47:03,016 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-11-20 17:47:03,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 17:47:03,017 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:03,017 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:47:03,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:47:03,018 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:03,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash 473662361, now seen corresponding path program 1 times [2024-11-20 17:47:03,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:03,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439971689] [2024-11-20 17:47:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:03,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:03,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:03,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439971689] [2024-11-20 17:47:03,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439971689] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:03,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646948503] [2024-11-20 17:47:03,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:03,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:03,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:03,313 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 17:47:03,315 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 17:47:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:03,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:47:03,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:03,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:47:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:03,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:03,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646948503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:03,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:03,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:47:03,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040792665] [2024-11-20 17:47:03,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:03,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:47:03,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:03,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:47:03,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:47:03,770 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:03,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 17:47:03,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:03,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:03,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:04,144 INFO L124 PetriNetUnfolderBase]: 1317/1932 cut-off events. [2024-11-20 17:47:04,144 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:47:04,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1932 events. 1317/1932 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9863 event pairs, 1060 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 3850. Up to 1878 conditions per place. [2024-11-20 17:47:04,156 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-11-20 17:47:04,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2024-11-20 17:47:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:47:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:47:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-20 17:47:04,159 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-11-20 17:47:04,159 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2024-11-20 17:47:04,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2024-11-20 17:47:04,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:47:04,162 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2024-11-20 17:47:04,162 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-20 17:47:04,163 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-20 17:47:04,163 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2024-11-20 17:47:04,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 17:47:04,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:04,164 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:47:04,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:47:04,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:04,365 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:04,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1800714578, now seen corresponding path program 1 times [2024-11-20 17:47:04,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:04,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012056730] [2024-11-20 17:47:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:04,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:04,421 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 17:47:04,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:04,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012056730] [2024-11-20 17:47:04,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012056730] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:04,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:04,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:47:04,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688317789] [2024-11-20 17:47:04,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:04,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:47:04,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:04,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:47:04,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:47:04,432 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:04,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 17:47:04,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:04,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:04,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:04,606 INFO L124 PetriNetUnfolderBase]: 1316/1931 cut-off events. [2024-11-20 17:47:04,607 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:47:04,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3873 conditions, 1931 events. 1316/1931 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9800 event pairs, 1060 based on Foata normal form. 1/1378 useless extension candidates. Maximal degree in co-relation 3851. Up to 1880 conditions per place. [2024-11-20 17:47:04,617 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-20 17:47:04,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 176 flow [2024-11-20 17:47:04,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:47:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:47:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-20 17:47:04,618 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-20 17:47:04,619 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 3 states and 65 transitions. [2024-11-20 17:47:04,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 176 flow [2024-11-20 17:47:04,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 150 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-20 17:47:04,620 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 86 flow [2024-11-20 17:47:04,621 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-20 17:47:04,621 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2024-11-20 17:47:04,621 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 86 flow [2024-11-20 17:47:04,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 17:47:04,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:04,622 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:04,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:47:04,622 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:04,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:04,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1910385278, now seen corresponding path program 1 times [2024-11-20 17:47:04,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:04,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112511519] [2024-11-20 17:47:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:04,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:04,789 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 17:47:04,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112511519] [2024-11-20 17:47:04,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112511519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927940220] [2024-11-20 17:47:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:04,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:04,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:04,793 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 17:47:04,795 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 17:47:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:04,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:47:04,864 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:04,945 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 17:47:04,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:04,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-20 17:47:05,002 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 17:47:05,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927940220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:05,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:05,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-20 17:47:05,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304824682] [2024-11-20 17:47:05,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:05,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:47:05,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:05,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:47:05,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:47:05,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:05,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 86 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 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 17:47:05,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:05,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:05,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:05,462 INFO L124 PetriNetUnfolderBase]: 2020/2971 cut-off events. [2024-11-20 17:47:05,462 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:47:05,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5883 conditions, 2971 events. 2020/2971 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 16225 event pairs, 880 based on Foata normal form. 0/2182 useless extension candidates. Maximal degree in co-relation 5872. Up to 1670 conditions per place. [2024-11-20 17:47:05,483 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 64 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2024-11-20 17:47:05,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 76 transitions, 310 flow [2024-11-20 17:47:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-11-20 17:47:05,484 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4085714285714286 [2024-11-20 17:47:05,484 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 86 flow. Second operand 7 states and 143 transitions. [2024-11-20 17:47:05,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 76 transitions, 310 flow [2024-11-20 17:47:05,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 76 transitions, 306 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:05,486 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 119 flow [2024-11-20 17:47:05,486 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=119, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-11-20 17:47:05,487 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2024-11-20 17:47:05,489 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 119 flow [2024-11-20 17:47:05,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 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 17:47:05,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:05,490 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:05,499 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 17:47:05,693 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 17:47:05,693 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:05,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:05,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1910385277, now seen corresponding path program 1 times [2024-11-20 17:47:05,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:05,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042946514] [2024-11-20 17:47:05,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:05,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:05,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:05,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042946514] [2024-11-20 17:47:05,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042946514] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:05,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:05,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:47:05,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87744403] [2024-11-20 17:47:05,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:05,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:47:05,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:05,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:47:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:47:05,743 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:05,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 17:47:05,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:05,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:05,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:05,900 INFO L124 PetriNetUnfolderBase]: 1148/1674 cut-off events. [2024-11-20 17:47:05,900 INFO L125 PetriNetUnfolderBase]: For 949/949 co-relation queries the response was YES. [2024-11-20 17:47:05,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4088 conditions, 1674 events. 1148/1674 cut-off events. For 949/949 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 7755 event pairs, 858 based on Foata normal form. 123/1590 useless extension candidates. Maximal degree in co-relation 801. Up to 1614 conditions per place. [2024-11-20 17:47:05,911 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-20 17:47:05,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 181 flow [2024-11-20 17:47:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:47:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:47:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-20 17:47:05,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-11-20 17:47:05,913 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 119 flow. Second operand 4 states and 68 transitions. [2024-11-20 17:47:05,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 181 flow [2024-11-20 17:47:05,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 38 transitions, 176 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:05,915 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 112 flow [2024-11-20 17:47:05,915 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2024-11-20 17:47:05,916 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -9 predicate places. [2024-11-20 17:47:05,916 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 112 flow [2024-11-20 17:47:05,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 17:47:05,916 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:05,916 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:05,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:47:05,917 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:05,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:05,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1899684390, now seen corresponding path program 1 times [2024-11-20 17:47:05,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:05,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778435199] [2024-11-20 17:47:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:05,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:06,018 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 17:47:06,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:06,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778435199] [2024-11-20 17:47:06,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778435199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:06,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144779227] [2024-11-20 17:47:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:06,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:06,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:06,022 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 17:47:06,023 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 17:47:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:06,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:47:06,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:06,136 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 17:47:06,136 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:06,185 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 17:47:06,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144779227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:06,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:06,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-20 17:47:06,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635361090] [2024-11-20 17:47:06,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:06,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:47:06,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:06,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:47:06,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:47:06,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:06,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 112 flow. Second operand has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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 17:47:06,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:06,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:06,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:06,634 INFO L124 PetriNetUnfolderBase]: 1981/2890 cut-off events. [2024-11-20 17:47:06,635 INFO L125 PetriNetUnfolderBase]: For 1751/1751 co-relation queries the response was YES. [2024-11-20 17:47:06,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7155 conditions, 2890 events. 1981/2890 cut-off events. For 1751/1751 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 14193 event pairs, 1312 based on Foata normal form. 0/2560 useless extension candidates. Maximal degree in co-relation 4828. Up to 1931 conditions per place. [2024-11-20 17:47:06,652 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 72 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-11-20 17:47:06,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 83 transitions, 422 flow [2024-11-20 17:47:06,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:06,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-20 17:47:06,654 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-11-20 17:47:06,654 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 112 flow. Second operand 7 states and 135 transitions. [2024-11-20 17:47:06,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 83 transitions, 422 flow [2024-11-20 17:47:06,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 83 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:06,657 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 160 flow [2024-11-20 17:47:06,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=160, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-11-20 17:47:06,659 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-11-20 17:47:06,662 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 160 flow [2024-11-20 17:47:06,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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 17:47:06,663 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:06,663 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:06,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:47:06,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:06,864 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:06,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash -323254620, now seen corresponding path program 1 times [2024-11-20 17:47:06,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:06,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166087130] [2024-11-20 17:47:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:06,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:06,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:06,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166087130] [2024-11-20 17:47:06,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166087130] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:06,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934046130] [2024-11-20 17:47:06,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:06,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:06,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:06,966 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 17:47:06,971 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 17:47:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:07,030 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:47:07,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:07,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:07,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934046130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:07,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:07,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:47:07,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758508230] [2024-11-20 17:47:07,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:07,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:47:07,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:07,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:47:07,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:47:07,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:07,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 160 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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 17:47:07,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:07,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:07,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:07,582 INFO L124 PetriNetUnfolderBase]: 1935/2831 cut-off events. [2024-11-20 17:47:07,582 INFO L125 PetriNetUnfolderBase]: For 1659/1761 co-relation queries the response was YES. [2024-11-20 17:47:07,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7305 conditions, 2831 events. 1935/2831 cut-off events. For 1659/1761 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13686 event pairs, 1243 based on Foata normal form. 38/2608 useless extension candidates. Maximal degree in co-relation 5138. Up to 2035 conditions per place. [2024-11-20 17:47:07,598 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 75 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-11-20 17:47:07,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 462 flow [2024-11-20 17:47:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:47:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:47:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-11-20 17:47:07,600 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-20 17:47:07,600 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 160 flow. Second operand 8 states and 155 transitions. [2024-11-20 17:47:07,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 462 flow [2024-11-20 17:47:07,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 88 transitions, 460 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:47:07,604 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 219 flow [2024-11-20 17:47:07,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=219, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2024-11-20 17:47:07,605 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-11-20 17:47:07,605 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 219 flow [2024-11-20 17:47:07,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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 17:47:07,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:07,606 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:07,614 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 17:47:07,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:07,809 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:07,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:07,809 INFO L85 PathProgramCache]: Analyzing trace with hash 200137493, now seen corresponding path program 1 times [2024-11-20 17:47:07,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:07,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041008215] [2024-11-20 17:47:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:07,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:07,989 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 17:47:07,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:07,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041008215] [2024-11-20 17:47:07,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041008215] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:07,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045629980] [2024-11-20 17:47:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:07,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:07,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:07,992 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 17:47:07,994 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 17:47:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:08,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:47:08,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:08,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:47:08,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:08,172 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:47:08,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045629980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:08,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:47:08,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-20 17:47:08,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413960891] [2024-11-20 17:47:08,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:08,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:47:08,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:08,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:47:08,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:47:08,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:08,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:08,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:08,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:08,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:08,541 INFO L124 PetriNetUnfolderBase]: 2208/3335 cut-off events. [2024-11-20 17:47:08,541 INFO L125 PetriNetUnfolderBase]: For 4364/4483 co-relation queries the response was YES. [2024-11-20 17:47:08,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9322 conditions, 3335 events. 2208/3335 cut-off events. For 4364/4483 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17526 event pairs, 1202 based on Foata normal form. 0/3062 useless extension candidates. Maximal degree in co-relation 6311. Up to 2353 conditions per place. [2024-11-20 17:47:08,563 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 62 selfloop transitions, 6 changer transitions 0/72 dead transitions. [2024-11-20 17:47:08,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 481 flow [2024-11-20 17:47:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:47:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:47:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-20 17:47:08,565 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.384 [2024-11-20 17:47:08,565 INFO L175 Difference]: Start difference. First operand has 60 places, 47 transitions, 219 flow. Second operand 5 states and 96 transitions. [2024-11-20 17:47:08,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 481 flow [2024-11-20 17:47:08,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 466 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:08,572 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 231 flow [2024-11-20 17:47:08,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2024-11-20 17:47:08,573 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-11-20 17:47:08,574 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 231 flow [2024-11-20 17:47:08,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:08,575 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:08,575 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:08,583 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 17:47:08,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:08,776 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:08,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:08,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1175444818, now seen corresponding path program 2 times [2024-11-20 17:47:08,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:08,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352479082] [2024-11-20 17:47:08,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:08,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:08,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:08,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352479082] [2024-11-20 17:47:08,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352479082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:08,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385748157] [2024-11-20 17:47:08,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:08,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:08,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:08,927 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 17:47:08,928 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 17:47:08,984 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:47:08,984 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:08,989 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 17:47:08,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:09,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:47:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:09,189 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:47:09,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385748157] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:09,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:47:09,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-20 17:47:09,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339139156] [2024-11-20 17:47:09,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:09,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:47:09,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:09,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:47:09,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:47:09,216 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:09,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 17:47:09,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:09,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:09,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:09,573 INFO L124 PetriNetUnfolderBase]: 2208/3237 cut-off events. [2024-11-20 17:47:09,573 INFO L125 PetriNetUnfolderBase]: For 5037/5095 co-relation queries the response was YES. [2024-11-20 17:47:09,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10123 conditions, 3237 events. 2208/3237 cut-off events. For 5037/5095 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15381 event pairs, 596 based on Foata normal form. 0/3103 useless extension candidates. Maximal degree in co-relation 6898. Up to 1370 conditions per place. [2024-11-20 17:47:09,593 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 78 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2024-11-20 17:47:09,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 613 flow [2024-11-20 17:47:09,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:47:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:47:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-11-20 17:47:09,595 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2024-11-20 17:47:09,595 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 231 flow. Second operand 6 states and 112 transitions. [2024-11-20 17:47:09,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 613 flow [2024-11-20 17:47:09,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 598 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:09,604 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 238 flow [2024-11-20 17:47:09,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2024-11-20 17:47:09,606 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-11-20 17:47:09,606 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 238 flow [2024-11-20 17:47:09,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 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 17:47:09,607 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:09,607 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:09,615 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 17:47:09,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:09,808 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:09,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1299844872, now seen corresponding path program 2 times [2024-11-20 17:47:09,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:09,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234232182] [2024-11-20 17:47:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:09,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:10,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234232182] [2024-11-20 17:47:10,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234232182] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:10,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738127546] [2024-11-20 17:47:10,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:10,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:10,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:10,027 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 17:47:10,028 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 17:47:10,089 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:10,089 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:10,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:47:10,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:10,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:10,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-20 17:47:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:10,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738127546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:10,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:10,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-20 17:47:10,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579009382] [2024-11-20 17:47:10,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:10,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:47:10,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:10,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:47:10,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:47:10,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:10,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 238 flow. Second operand has 20 states, 20 states have (on average 11.65) internal successors, (233), 20 states have internal predecessors, (233), 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 17:47:10,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:10,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:10,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:11,237 INFO L124 PetriNetUnfolderBase]: 2288/3464 cut-off events. [2024-11-20 17:47:11,237 INFO L125 PetriNetUnfolderBase]: For 5238/5422 co-relation queries the response was YES. [2024-11-20 17:47:11,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10977 conditions, 3464 events. 2288/3464 cut-off events. For 5238/5422 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16996 event pairs, 810 based on Foata normal form. 66/3525 useless extension candidates. Maximal degree in co-relation 7638. Up to 1167 conditions per place. [2024-11-20 17:47:11,266 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 113 selfloop transitions, 14 changer transitions 0/131 dead transitions. [2024-11-20 17:47:11,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 131 transitions, 786 flow [2024-11-20 17:47:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:47:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:47:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-11-20 17:47:11,268 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-11-20 17:47:11,268 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 238 flow. Second operand 10 states and 215 transitions. [2024-11-20 17:47:11,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 131 transitions, 786 flow [2024-11-20 17:47:11,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 131 transitions, 746 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:47:11,309 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 290 flow [2024-11-20 17:47:11,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=290, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2024-11-20 17:47:11,309 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2024-11-20 17:47:11,310 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 290 flow [2024-11-20 17:47:11,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.65) internal successors, (233), 20 states have internal predecessors, (233), 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 17:47:11,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:11,310 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:11,318 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 17:47:11,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:11,511 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:11,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:11,512 INFO L85 PathProgramCache]: Analyzing trace with hash 882032767, now seen corresponding path program 1 times [2024-11-20 17:47:11,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:11,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311189957] [2024-11-20 17:47:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:11,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:11,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:11,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311189957] [2024-11-20 17:47:11,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311189957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:11,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684988336] [2024-11-20 17:47:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:11,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:11,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:11,630 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 17:47:11,631 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 17:47:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:11,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 17:47:11,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:11,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:11,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:11,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684988336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:11,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:11,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:47:11,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102408229] [2024-11-20 17:47:11,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:11,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:47:11,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:47:11,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:47:11,928 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:11,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 290 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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 17:47:11,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:11,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:11,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:12,384 INFO L124 PetriNetUnfolderBase]: 2593/3691 cut-off events. [2024-11-20 17:47:12,384 INFO L125 PetriNetUnfolderBase]: For 9487/9781 co-relation queries the response was YES. [2024-11-20 17:47:12,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12508 conditions, 3691 events. 2593/3691 cut-off events. For 9487/9781 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 16277 event pairs, 1665 based on Foata normal form. 34/3719 useless extension candidates. Maximal degree in co-relation 9737. Up to 2894 conditions per place. [2024-11-20 17:47:12,406 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 75 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-11-20 17:47:12,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 88 transitions, 638 flow [2024-11-20 17:47:12,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:47:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:47:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-11-20 17:47:12,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3675 [2024-11-20 17:47:12,408 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 290 flow. Second operand 8 states and 147 transitions. [2024-11-20 17:47:12,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 88 transitions, 638 flow [2024-11-20 17:47:12,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 88 transitions, 589 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:12,415 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 314 flow [2024-11-20 17:47:12,415 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2024-11-20 17:47:12,416 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2024-11-20 17:47:12,416 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 314 flow [2024-11-20 17:47:12,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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 17:47:12,416 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:12,416 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-20 17:47:12,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 17:47:12,620 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,SelfDestructingSolverStorable11 [2024-11-20 17:47:12,621 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:12,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash -252873238, now seen corresponding path program 3 times [2024-11-20 17:47:12,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:12,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221436193] [2024-11-20 17:47:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:12,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:12,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:12,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221436193] [2024-11-20 17:47:12,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221436193] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:12,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169739462] [2024-11-20 17:47:12,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:47:12,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:12,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:12,725 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 17:47:12,726 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 17:47:12,778 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:47:12,779 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:12,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 17:47:12,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:12,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:13,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-20 17:47:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:13,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169739462] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:13,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:13,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2024-11-20 17:47:13,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355924394] [2024-11-20 17:47:13,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:13,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:47:13,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:13,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:47:13,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:47:13,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:13,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 314 flow. Second operand has 20 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 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 17:47:13,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:13,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:13,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:14,361 INFO L124 PetriNetUnfolderBase]: 4150/5944 cut-off events. [2024-11-20 17:47:14,362 INFO L125 PetriNetUnfolderBase]: For 6574/6983 co-relation queries the response was YES. [2024-11-20 17:47:14,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19547 conditions, 5944 events. 4150/5944 cut-off events. For 6574/6983 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 29750 event pairs, 894 based on Foata normal form. 132/6068 useless extension candidates. Maximal degree in co-relation 10487. Up to 1101 conditions per place. [2024-11-20 17:47:14,406 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 206 selfloop transitions, 27 changer transitions 0/236 dead transitions. [2024-11-20 17:47:14,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 236 transitions, 1538 flow [2024-11-20 17:47:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 17:47:14,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 17:47:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 327 transitions. [2024-11-20 17:47:14,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40875 [2024-11-20 17:47:14,408 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 314 flow. Second operand 16 states and 327 transitions. [2024-11-20 17:47:14,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 236 transitions, 1538 flow [2024-11-20 17:47:14,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 236 transitions, 1515 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:14,425 INFO L231 Difference]: Finished difference. Result has 89 places, 66 transitions, 468 flow [2024-11-20 17:47:14,426 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=468, PETRI_PLACES=89, PETRI_TRANSITIONS=66} [2024-11-20 17:47:14,426 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-11-20 17:47:14,426 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 66 transitions, 468 flow [2024-11-20 17:47:14,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 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 17:47:14,427 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:14,427 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:14,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:14,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-20 17:47:14,628 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:14,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:14,629 INFO L85 PathProgramCache]: Analyzing trace with hash -541597485, now seen corresponding path program 2 times [2024-11-20 17:47:14,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:14,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227434801] [2024-11-20 17:47:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:14,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:14,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:14,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227434801] [2024-11-20 17:47:14,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227434801] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:14,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42089086] [2024-11-20 17:47:14,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:14,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:14,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:14,894 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:14,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:47:14,971 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:14,971 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:14,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:47:14,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:15,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:15,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:15,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-20 17:47:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:15,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42089086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:15,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:15,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-20 17:47:15,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370686868] [2024-11-20 17:47:15,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:15,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:47:15,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:15,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:47:15,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:47:15,667 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:15,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 66 transitions, 468 flow. Second operand has 20 states, 20 states have (on average 11.4) internal successors, (228), 20 states have internal predecessors, (228), 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 17:47:15,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:15,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:15,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:16,323 INFO L124 PetriNetUnfolderBase]: 3656/5219 cut-off events. [2024-11-20 17:47:16,323 INFO L125 PetriNetUnfolderBase]: For 17957/18347 co-relation queries the response was YES. [2024-11-20 17:47:16,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19988 conditions, 5219 events. 3656/5219 cut-off events. For 17957/18347 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 25027 event pairs, 781 based on Foata normal form. 130/5344 useless extension candidates. Maximal degree in co-relation 10777. Up to 1731 conditions per place. [2024-11-20 17:47:16,360 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 134 selfloop transitions, 14 changer transitions 0/153 dead transitions. [2024-11-20 17:47:16,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 153 transitions, 1497 flow [2024-11-20 17:47:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:16,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-11-20 17:47:16,362 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3657142857142857 [2024-11-20 17:47:16,362 INFO L175 Difference]: Start difference. First operand has 89 places, 66 transitions, 468 flow. Second operand 7 states and 128 transitions. [2024-11-20 17:47:16,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 153 transitions, 1497 flow [2024-11-20 17:47:16,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 153 transitions, 1341 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:16,384 INFO L231 Difference]: Finished difference. Result has 89 places, 66 transitions, 455 flow [2024-11-20 17:47:16,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=89, PETRI_TRANSITIONS=66} [2024-11-20 17:47:16,385 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-11-20 17:47:16,385 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 66 transitions, 455 flow [2024-11-20 17:47:16,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.4) internal successors, (228), 20 states have internal predecessors, (228), 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 17:47:16,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:16,385 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:16,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 17:47:16,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-20 17:47:16,586 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:16,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:16,586 INFO L85 PathProgramCache]: Analyzing trace with hash 993971891, now seen corresponding path program 1 times [2024-11-20 17:47:16,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:16,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538941944] [2024-11-20 17:47:16,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:16,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:16,674 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 17:47:16,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:16,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538941944] [2024-11-20 17:47:16,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538941944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:16,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772729118] [2024-11-20 17:47:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:16,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:16,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:16,677 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:16,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 17:47:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:16,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:47:16,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:16,775 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 17:47:16,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:16,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772729118] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:16,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:47:16,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-20 17:47:16,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317661647] [2024-11-20 17:47:16,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:16,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:47:16,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:47:16,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:47:16,813 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:16,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 66 transitions, 455 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 17:47:16,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:16,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:16,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:17,169 INFO L124 PetriNetUnfolderBase]: 3554/5207 cut-off events. [2024-11-20 17:47:17,170 INFO L125 PetriNetUnfolderBase]: For 13487/13787 co-relation queries the response was YES. [2024-11-20 17:47:17,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19434 conditions, 5207 events. 3554/5207 cut-off events. For 13487/13787 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 26026 event pairs, 1204 based on Foata normal form. 154/5344 useless extension candidates. Maximal degree in co-relation 11134. Up to 2793 conditions per place. [2024-11-20 17:47:17,198 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 67 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-11-20 17:47:17,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 84 transitions, 704 flow [2024-11-20 17:47:17,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:47:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:47:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-20 17:47:17,199 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.352 [2024-11-20 17:47:17,199 INFO L175 Difference]: Start difference. First operand has 89 places, 66 transitions, 455 flow. Second operand 5 states and 88 transitions. [2024-11-20 17:47:17,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 84 transitions, 704 flow [2024-11-20 17:47:17,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 84 transitions, 642 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-20 17:47:17,219 INFO L231 Difference]: Finished difference. Result has 86 places, 63 transitions, 411 flow [2024-11-20 17:47:17,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=411, PETRI_PLACES=86, PETRI_TRANSITIONS=63} [2024-11-20 17:47:17,219 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-11-20 17:47:17,220 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 63 transitions, 411 flow [2024-11-20 17:47:17,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 17:47:17,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:17,220 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:17,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:17,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-20 17:47:17,420 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:17,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:17,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1776191285, now seen corresponding path program 1 times [2024-11-20 17:47:17,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:17,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028655240] [2024-11-20 17:47:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:17,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:17,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:17,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028655240] [2024-11-20 17:47:17,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028655240] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:17,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:17,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:47:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037688112] [2024-11-20 17:47:17,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:17,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:47:17,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:17,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:47:17,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:47:17,480 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:17,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 63 transitions, 411 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:17,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:17,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:17,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:17,957 INFO L124 PetriNetUnfolderBase]: 3300/4867 cut-off events. [2024-11-20 17:47:17,957 INFO L125 PetriNetUnfolderBase]: For 13626/13940 co-relation queries the response was YES. [2024-11-20 17:47:17,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17544 conditions, 4867 events. 3300/4867 cut-off events. For 13626/13940 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 24950 event pairs, 1116 based on Foata normal form. 164/4896 useless extension candidates. Maximal degree in co-relation 12722. Up to 2577 conditions per place. [2024-11-20 17:47:17,977 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 75 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2024-11-20 17:47:17,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 777 flow [2024-11-20 17:47:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:47:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:47:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-20 17:47:17,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-20 17:47:17,978 INFO L175 Difference]: Start difference. First operand has 86 places, 63 transitions, 411 flow. Second operand 4 states and 76 transitions. [2024-11-20 17:47:17,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 777 flow [2024-11-20 17:47:18,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 733 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:18,005 INFO L231 Difference]: Finished difference. Result has 85 places, 61 transitions, 391 flow [2024-11-20 17:47:18,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=391, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2024-11-20 17:47:18,006 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2024-11-20 17:47:18,006 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 391 flow [2024-11-20 17:47:18,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:18,006 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:18,006 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:18,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-20 17:47:18,007 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:18,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:18,007 INFO L85 PathProgramCache]: Analyzing trace with hash 247241469, now seen corresponding path program 1 times [2024-11-20 17:47:18,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:18,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056752185] [2024-11-20 17:47:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:18,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:18,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056752185] [2024-11-20 17:47:18,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056752185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:18,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936619385] [2024-11-20 17:47:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:18,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:18,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:18,690 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:18,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 17:47:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:18,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-20 17:47:18,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:18,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 17:47:19,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 65 [2024-11-20 17:47:19,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2024-11-20 17:47:19,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-11-20 17:47:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:19,292 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:19,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-11-20 17:47:19,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 127 [2024-11-20 17:47:20,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-11-20 17:47:20,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:20,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 82 [2024-11-20 17:47:20,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2024-11-20 17:47:20,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:47:20,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2024-11-20 17:47:20,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2024-11-20 17:47:20,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:47:20,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2024-11-20 17:47:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:20,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936619385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:20,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:20,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-20 17:47:20,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643888571] [2024-11-20 17:47:20,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:20,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 17:47:20,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:20,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 17:47:20,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-20 17:47:20,970 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:20,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 391 flow. Second operand has 23 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 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 17:47:20,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:20,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:20,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:22,554 INFO L124 PetriNetUnfolderBase]: 2829/4413 cut-off events. [2024-11-20 17:47:22,554 INFO L125 PetriNetUnfolderBase]: For 10441/10703 co-relation queries the response was YES. [2024-11-20 17:47:22,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15853 conditions, 4413 events. 2829/4413 cut-off events. For 10441/10703 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 23566 event pairs, 585 based on Foata normal form. 1/4407 useless extension candidates. Maximal degree in co-relation 11106. Up to 3462 conditions per place. [2024-11-20 17:47:22,570 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 82 selfloop transitions, 18 changer transitions 47/154 dead transitions. [2024-11-20 17:47:22,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 154 transitions, 1126 flow [2024-11-20 17:47:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 17:47:22,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 17:47:22,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 284 transitions. [2024-11-20 17:47:22,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-11-20 17:47:22,572 INFO L175 Difference]: Start difference. First operand has 85 places, 61 transitions, 391 flow. Second operand 16 states and 284 transitions. [2024-11-20 17:47:22,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 154 transitions, 1126 flow [2024-11-20 17:47:22,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 154 transitions, 1096 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:22,593 INFO L231 Difference]: Finished difference. Result has 107 places, 72 transitions, 505 flow [2024-11-20 17:47:22,593 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=505, PETRI_PLACES=107, PETRI_TRANSITIONS=72} [2024-11-20 17:47:22,594 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 55 predicate places. [2024-11-20 17:47:22,594 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 72 transitions, 505 flow [2024-11-20 17:47:22,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 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 17:47:22,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:22,594 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:22,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-20 17:47:22,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-20 17:47:22,798 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:22,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash 613400421, now seen corresponding path program 2 times [2024-11-20 17:47:22,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:22,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118227050] [2024-11-20 17:47:22,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:22,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:23,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:23,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118227050] [2024-11-20 17:47:23,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118227050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:23,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859170059] [2024-11-20 17:47:23,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:23,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:23,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:23,360 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:23,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 17:47:23,436 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:23,436 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:23,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 17:47:23,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:23,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 17:47:23,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2024-11-20 17:47:23,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-20 17:47:23,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-20 17:47:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:23,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:23,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-11-20 17:47:23,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 127 [2024-11-20 17:47:24,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2024-11-20 17:47:24,643 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 17:47:24,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 79 [2024-11-20 17:47:24,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2024-11-20 17:47:24,700 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:24,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2024-11-20 17:47:24,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-11-20 17:47:24,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:24,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 82 [2024-11-20 17:47:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:24,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859170059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:24,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:24,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-20 17:47:24,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419419508] [2024-11-20 17:47:24,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:24,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 17:47:24,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:24,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 17:47:24,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-11-20 17:47:25,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:25,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 72 transitions, 505 flow. Second operand has 22 states, 22 states have (on average 13.0) internal successors, (286), 22 states have internal predecessors, (286), 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 17:47:25,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:25,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:25,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:26,807 INFO L124 PetriNetUnfolderBase]: 2872/4460 cut-off events. [2024-11-20 17:47:26,807 INFO L125 PetriNetUnfolderBase]: For 12485/12751 co-relation queries the response was YES. [2024-11-20 17:47:26,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16895 conditions, 4460 events. 2872/4460 cut-off events. For 12485/12751 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 23763 event pairs, 627 based on Foata normal form. 13/4468 useless extension candidates. Maximal degree in co-relation 16853. Up to 3538 conditions per place. [2024-11-20 17:47:26,830 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 92 selfloop transitions, 26 changer transitions 35/160 dead transitions. [2024-11-20 17:47:26,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 160 transitions, 1352 flow [2024-11-20 17:47:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 17:47:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 17:47:26,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 318 transitions. [2024-11-20 17:47:26,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33473684210526317 [2024-11-20 17:47:26,832 INFO L175 Difference]: Start difference. First operand has 107 places, 72 transitions, 505 flow. Second operand 19 states and 318 transitions. [2024-11-20 17:47:26,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 160 transitions, 1352 flow [2024-11-20 17:47:26,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 160 transitions, 1305 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-11-20 17:47:26,860 INFO L231 Difference]: Finished difference. Result has 118 places, 82 transitions, 667 flow [2024-11-20 17:47:26,860 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=667, PETRI_PLACES=118, PETRI_TRANSITIONS=82} [2024-11-20 17:47:26,861 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 66 predicate places. [2024-11-20 17:47:26,861 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 82 transitions, 667 flow [2024-11-20 17:47:26,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 13.0) internal successors, (286), 22 states have internal predecessors, (286), 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 17:47:26,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:26,861 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:26,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:27,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 17:47:27,062 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:27,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:27,062 INFO L85 PathProgramCache]: Analyzing trace with hash -427067913, now seen corresponding path program 3 times [2024-11-20 17:47:27,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:27,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638023776] [2024-11-20 17:47:27,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:27,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:27,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:27,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:27,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638023776] [2024-11-20 17:47:27,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638023776] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:27,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953846552] [2024-11-20 17:47:27,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:47:27,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:27,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:27,676 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:27,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 17:47:27,748 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-20 17:47:27,749 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:27,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 17:47:27,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:27,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 17:47:28,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2024-11-20 17:47:28,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-20 17:47:28,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-20 17:47:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:28,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:28,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-11-20 17:47:28,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 127 [2024-11-20 17:47:28,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-11-20 17:47:28,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:28,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 82 [2024-11-20 17:47:29,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2024-11-20 17:47:29,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:47:29,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2024-11-20 17:47:29,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2024-11-20 17:47:29,188 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 17:47:29,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 53 [2024-11-20 17:47:29,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:29,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953846552] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:29,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:29,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-20 17:47:29,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855503503] [2024-11-20 17:47:29,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:29,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 17:47:29,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:29,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 17:47:29,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-11-20 17:47:29,606 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:29,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 82 transitions, 667 flow. Second operand has 22 states, 22 states have (on average 12.909090909090908) internal successors, (284), 22 states have internal predecessors, (284), 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 17:47:29,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:29,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:29,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:31,317 INFO L124 PetriNetUnfolderBase]: 2844/4425 cut-off events. [2024-11-20 17:47:31,317 INFO L125 PetriNetUnfolderBase]: For 12803/13083 co-relation queries the response was YES. [2024-11-20 17:47:31,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17019 conditions, 4425 events. 2844/4425 cut-off events. For 12803/13083 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 23678 event pairs, 613 based on Foata normal form. 13/4431 useless extension candidates. Maximal degree in co-relation 16970. Up to 3440 conditions per place. [2024-11-20 17:47:31,336 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 107 selfloop transitions, 23 changer transitions 38/175 dead transitions. [2024-11-20 17:47:31,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 175 transitions, 1536 flow [2024-11-20 17:47:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 17:47:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 17:47:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 338 transitions. [2024-11-20 17:47:31,338 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.338 [2024-11-20 17:47:31,338 INFO L175 Difference]: Start difference. First operand has 118 places, 82 transitions, 667 flow. Second operand 20 states and 338 transitions. [2024-11-20 17:47:31,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 175 transitions, 1536 flow [2024-11-20 17:47:31,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 175 transitions, 1439 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-11-20 17:47:31,364 INFO L231 Difference]: Finished difference. Result has 123 places, 83 transitions, 692 flow [2024-11-20 17:47:31,364 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=692, PETRI_PLACES=123, PETRI_TRANSITIONS=83} [2024-11-20 17:47:31,364 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 71 predicate places. [2024-11-20 17:47:31,364 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 83 transitions, 692 flow [2024-11-20 17:47:31,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.909090909090908) internal successors, (284), 22 states have internal predecessors, (284), 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 17:47:31,365 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:31,365 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:31,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-20 17:47:31,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:31,569 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:31,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:31,570 INFO L85 PathProgramCache]: Analyzing trace with hash -801748669, now seen corresponding path program 4 times [2024-11-20 17:47:31,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:31,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719728336] [2024-11-20 17:47:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:31,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:32,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:32,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719728336] [2024-11-20 17:47:32,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719728336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:32,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108108663] [2024-11-20 17:47:32,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 17:47:32,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:32,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:32,105 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:32,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 17:47:32,178 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 17:47:32,179 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:32,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 17:47:32,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:32,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 17:47:32,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2024-11-20 17:47:32,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-20 17:47:32,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-20 17:47:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:32,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:32,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2024-11-20 17:47:32,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 127 [2024-11-20 17:47:33,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2024-11-20 17:47:33,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:33,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2024-11-20 17:47:33,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2024-11-20 17:47:33,441 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:33,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 82 [2024-11-20 17:47:33,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2024-11-20 17:47:33,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:47:33,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2024-11-20 17:47:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:33,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108108663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:33,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:33,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-11-20 17:47:33,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493876709] [2024-11-20 17:47:33,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:33,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 17:47:33,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:33,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 17:47:33,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2024-11-20 17:47:33,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:33,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 83 transitions, 692 flow. Second operand has 23 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 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 17:47:33,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:33,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:33,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:34,983 INFO L124 PetriNetUnfolderBase]: 2704/4222 cut-off events. [2024-11-20 17:47:34,983 INFO L125 PetriNetUnfolderBase]: For 11373/11646 co-relation queries the response was YES. [2024-11-20 17:47:34,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15983 conditions, 4222 events. 2704/4222 cut-off events. For 11373/11646 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22533 event pairs, 563 based on Foata normal form. 7/4224 useless extension candidates. Maximal degree in co-relation 15941. Up to 3440 conditions per place. [2024-11-20 17:47:35,006 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 80 selfloop transitions, 18 changer transitions 39/144 dead transitions. [2024-11-20 17:47:35,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 144 transitions, 1232 flow [2024-11-20 17:47:35,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 17:47:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 17:47:35,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 257 transitions. [2024-11-20 17:47:35,008 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3426666666666667 [2024-11-20 17:47:35,008 INFO L175 Difference]: Start difference. First operand has 123 places, 83 transitions, 692 flow. Second operand 15 states and 257 transitions. [2024-11-20 17:47:35,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 144 transitions, 1232 flow [2024-11-20 17:47:35,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 144 transitions, 1159 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-11-20 17:47:35,031 INFO L231 Difference]: Finished difference. Result has 121 places, 78 transitions, 604 flow [2024-11-20 17:47:35,031 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=604, PETRI_PLACES=121, PETRI_TRANSITIONS=78} [2024-11-20 17:47:35,031 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 69 predicate places. [2024-11-20 17:47:35,031 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 78 transitions, 604 flow [2024-11-20 17:47:35,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 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 17:47:35,032 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:35,032 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:35,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:35,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:35,232 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:35,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:35,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1236903101, now seen corresponding path program 5 times [2024-11-20 17:47:35,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:35,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994867774] [2024-11-20 17:47:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:35,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:35,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:35,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994867774] [2024-11-20 17:47:35,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994867774] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:35,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610304956] [2024-11-20 17:47:35,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 17:47:35,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:35,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:35,779 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:35,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 17:47:35,857 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:35,857 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:35,859 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-20 17:47:35,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:35,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 17:47:36,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2024-11-20 17:47:36,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-20 17:47:36,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-20 17:47:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:36,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:36,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 124 [2024-11-20 17:47:36,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 120 [2024-11-20 17:47:37,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 113 [2024-11-20 17:47:37,239 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:37,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 157 [2024-11-20 17:47:38,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 93 [2024-11-20 17:47:38,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:38,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 119 [2024-11-20 17:47:38,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:38,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610304956] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:38,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:38,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-11-20 17:47:38,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105191873] [2024-11-20 17:47:38,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:38,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 17:47:38,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:38,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 17:47:38,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-11-20 17:47:38,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:38,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 78 transitions, 604 flow. Second operand has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 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) [2024-11-20 17:47:38,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:38,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:38,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:40,499 INFO L124 PetriNetUnfolderBase]: 3384/5073 cut-off events. [2024-11-20 17:47:40,499 INFO L125 PetriNetUnfolderBase]: For 12547/12881 co-relation queries the response was YES. [2024-11-20 17:47:40,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19137 conditions, 5073 events. 3384/5073 cut-off events. For 12547/12881 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 26258 event pairs, 654 based on Foata normal form. 5/4946 useless extension candidates. Maximal degree in co-relation 19095. Up to 4203 conditions per place. [2024-11-20 17:47:40,520 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 95 selfloop transitions, 25 changer transitions 41/166 dead transitions. [2024-11-20 17:47:40,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 166 transitions, 1349 flow [2024-11-20 17:47:40,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 17:47:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-20 17:47:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 329 transitions. [2024-11-20 17:47:40,521 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31333333333333335 [2024-11-20 17:47:40,521 INFO L175 Difference]: Start difference. First operand has 121 places, 78 transitions, 604 flow. Second operand 21 states and 329 transitions. [2024-11-20 17:47:40,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 166 transitions, 1349 flow [2024-11-20 17:47:40,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 166 transitions, 1282 flow, removed 8 selfloop flow, removed 15 redundant places. [2024-11-20 17:47:40,536 INFO L231 Difference]: Finished difference. Result has 116 places, 76 transitions, 579 flow [2024-11-20 17:47:40,536 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=541, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=579, PETRI_PLACES=116, PETRI_TRANSITIONS=76} [2024-11-20 17:47:40,536 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 64 predicate places. [2024-11-20 17:47:40,536 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 76 transitions, 579 flow [2024-11-20 17:47:40,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 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) [2024-11-20 17:47:40,537 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:40,537 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:40,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-20 17:47:40,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:40,737 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:40,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:40,738 INFO L85 PathProgramCache]: Analyzing trace with hash -633697229, now seen corresponding path program 6 times [2024-11-20 17:47:40,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:40,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470167755] [2024-11-20 17:47:40,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:40,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:41,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:41,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470167755] [2024-11-20 17:47:41,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470167755] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:41,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818834127] [2024-11-20 17:47:41,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 17:47:41,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:41,233 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:41,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 17:47:41,304 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 17:47:41,305 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:41,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 17:47:41,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:41,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 17:47:41,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2024-11-20 17:47:41,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-20 17:47:41,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-20 17:47:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:41,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:41,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 112 [2024-11-20 17:47:41,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 108 [2024-11-20 17:47:42,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2024-11-20 17:47:42,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:42,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 149 [2024-11-20 17:47:43,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 92 [2024-11-20 17:47:43,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:43,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 118 [2024-11-20 17:47:43,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:43,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818834127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:43,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:43,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-11-20 17:47:43,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348671863] [2024-11-20 17:47:43,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:43,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 17:47:43,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:43,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 17:47:43,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2024-11-20 17:47:44,088 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-20 17:47:44,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 76 transitions, 579 flow. Second operand has 23 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 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 17:47:44,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:44,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-20 17:47:44,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:45,414 INFO L124 PetriNetUnfolderBase]: 2531/3931 cut-off events. [2024-11-20 17:47:45,414 INFO L125 PetriNetUnfolderBase]: For 9779/10061 co-relation queries the response was YES. [2024-11-20 17:47:45,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14644 conditions, 3931 events. 2531/3931 cut-off events. For 9779/10061 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 20549 event pairs, 514 based on Foata normal form. 17/3946 useless extension candidates. Maximal degree in co-relation 14610. Up to 3163 conditions per place. [2024-11-20 17:47:45,434 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 54 selfloop transitions, 14 changer transitions 59/134 dead transitions. [2024-11-20 17:47:45,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 134 transitions, 1069 flow [2024-11-20 17:47:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 17:47:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 17:47:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 282 transitions. [2024-11-20 17:47:45,435 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33176470588235296 [2024-11-20 17:47:45,435 INFO L175 Difference]: Start difference. First operand has 116 places, 76 transitions, 579 flow. Second operand 17 states and 282 transitions. [2024-11-20 17:47:45,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 134 transitions, 1069 flow [2024-11-20 17:47:45,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 134 transitions, 1015 flow, removed 2 selfloop flow, removed 15 redundant places. [2024-11-20 17:47:45,452 INFO L231 Difference]: Finished difference. Result has 110 places, 59 transitions, 396 flow [2024-11-20 17:47:45,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=396, PETRI_PLACES=110, PETRI_TRANSITIONS=59} [2024-11-20 17:47:45,453 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 58 predicate places. [2024-11-20 17:47:45,453 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 59 transitions, 396 flow [2024-11-20 17:47:45,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.826086956521738) internal successors, (295), 23 states have internal predecessors, (295), 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 17:47:45,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:45,453 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:45,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:45,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:45,654 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:45,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:45,654 INFO L85 PathProgramCache]: Analyzing trace with hash 628079225, now seen corresponding path program 7 times [2024-11-20 17:47:45,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:45,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225524279] [2024-11-20 17:47:45,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:45,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:47:45,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:45,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225524279] [2024-11-20 17:47:45,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225524279] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:45,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898421071] [2024-11-20 17:47:45,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 17:47:45,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:45,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:45,743 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:45,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 17:47:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:45,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:47:45,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:45,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:47:45,894 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:47:45,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898421071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:45,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:45,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:47:45,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234344515] [2024-11-20 17:47:45,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:45,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:47:45,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:45,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:47:45,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:47:46,004 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-20 17:47:46,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 59 transitions, 396 flow. Second operand has 14 states, 14 states have (on average 12.142857142857142) internal successors, (170), 14 states have internal predecessors, (170), 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 17:47:46,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:46,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-20 17:47:46,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:46,508 INFO L124 PetriNetUnfolderBase]: 2981/4425 cut-off events. [2024-11-20 17:47:46,508 INFO L125 PetriNetUnfolderBase]: For 8024/8396 co-relation queries the response was YES. [2024-11-20 17:47:46,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15580 conditions, 4425 events. 2981/4425 cut-off events. For 8024/8396 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 22444 event pairs, 634 based on Foata normal form. 132/4527 useless extension candidates. Maximal degree in co-relation 15555. Up to 1360 conditions per place. [2024-11-20 17:47:46,540 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 81 selfloop transitions, 15 changer transitions 0/100 dead transitions. [2024-11-20 17:47:46,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 731 flow [2024-11-20 17:47:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:47:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:47:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-11-20 17:47:46,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3488888888888889 [2024-11-20 17:47:46,542 INFO L175 Difference]: Start difference. First operand has 110 places, 59 transitions, 396 flow. Second operand 9 states and 157 transitions. [2024-11-20 17:47:46,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 731 flow [2024-11-20 17:47:46,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 100 transitions, 646 flow, removed 25 selfloop flow, removed 15 redundant places. [2024-11-20 17:47:46,562 INFO L231 Difference]: Finished difference. Result has 81 places, 58 transitions, 367 flow [2024-11-20 17:47:46,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=367, PETRI_PLACES=81, PETRI_TRANSITIONS=58} [2024-11-20 17:47:46,563 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 29 predicate places. [2024-11-20 17:47:46,563 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 58 transitions, 367 flow [2024-11-20 17:47:46,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.142857142857142) internal successors, (170), 14 states have internal predecessors, (170), 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 17:47:46,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:46,563 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:46,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:46,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:46,764 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:46,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:46,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1512827881, now seen corresponding path program 8 times [2024-11-20 17:47:46,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:46,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743478399] [2024-11-20 17:47:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:46,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:46,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:46,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743478399] [2024-11-20 17:47:46,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743478399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:46,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725024148] [2024-11-20 17:47:46,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:46,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:46,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:46,886 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:46,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 17:47:46,954 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:46,954 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:46,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:47:46,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:47,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:47,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:47:47,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725024148] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:47,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:47,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-20 17:47:47,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171705711] [2024-11-20 17:47:47,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:47,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:47:47,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:47,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:47:47,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:47:47,177 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-11-20 17:47:47,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 58 transitions, 367 flow. Second operand has 18 states, 18 states have (on average 10.88888888888889) internal successors, (196), 18 states have internal predecessors, (196), 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 17:47:47,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:47,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-11-20 17:47:47,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:47,917 INFO L124 PetriNetUnfolderBase]: 6411/9357 cut-off events. [2024-11-20 17:47:47,917 INFO L125 PetriNetUnfolderBase]: For 27205/27205 co-relation queries the response was YES. [2024-11-20 17:47:47,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31585 conditions, 9357 events. 6411/9357 cut-off events. For 27205/27205 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 51563 event pairs, 1304 based on Foata normal form. 0/8472 useless extension candidates. Maximal degree in co-relation 31566. Up to 2702 conditions per place. [2024-11-20 17:47:47,961 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 208 selfloop transitions, 26 changer transitions 0/239 dead transitions. [2024-11-20 17:47:47,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 239 transitions, 2191 flow [2024-11-20 17:47:47,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:47:47,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:47:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2024-11-20 17:47:47,962 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3353846153846154 [2024-11-20 17:47:47,962 INFO L175 Difference]: Start difference. First operand has 81 places, 58 transitions, 367 flow. Second operand 13 states and 218 transitions. [2024-11-20 17:47:47,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 239 transitions, 2191 flow [2024-11-20 17:47:47,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 239 transitions, 2091 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-11-20 17:47:47,975 INFO L231 Difference]: Finished difference. Result has 90 places, 76 transitions, 503 flow [2024-11-20 17:47:47,975 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=503, PETRI_PLACES=90, PETRI_TRANSITIONS=76} [2024-11-20 17:47:47,975 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 38 predicate places. [2024-11-20 17:47:47,975 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 76 transitions, 503 flow [2024-11-20 17:47:47,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.88888888888889) internal successors, (196), 18 states have internal predecessors, (196), 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 17:47:47,976 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:47,976 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:47,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:48,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:48,176 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:48,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:48,177 INFO L85 PathProgramCache]: Analyzing trace with hash -248525831, now seen corresponding path program 9 times [2024-11-20 17:47:48,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:48,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474114399] [2024-11-20 17:47:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:48,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:48,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:48,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474114399] [2024-11-20 17:47:48,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474114399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:48,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875285788] [2024-11-20 17:47:48,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:47:48,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:48,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:48,316 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:48,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 17:47:48,442 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-20 17:47:48,442 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:48,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:47:48,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:48,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:48,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875285788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:48,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:48,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-20 17:47:48,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310428486] [2024-11-20 17:47:48,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:48,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 17:47:48,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 17:47:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-20 17:47:48,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-11-20 17:47:48,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 76 transitions, 503 flow. Second operand has 19 states, 19 states have (on average 10.947368421052632) internal successors, (208), 19 states have internal predecessors, (208), 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 17:47:48,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:48,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-11-20 17:47:48,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:49,772 INFO L124 PetriNetUnfolderBase]: 9334/13552 cut-off events. [2024-11-20 17:47:49,773 INFO L125 PetriNetUnfolderBase]: For 42664/42664 co-relation queries the response was YES. [2024-11-20 17:47:49,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51840 conditions, 13552 events. 9334/13552 cut-off events. For 42664/42664 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 77163 event pairs, 995 based on Foata normal form. 32/13573 useless extension candidates. Maximal degree in co-relation 51817. Up to 2203 conditions per place. [2024-11-20 17:47:49,845 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 255 selfloop transitions, 51 changer transitions 0/311 dead transitions. [2024-11-20 17:47:49,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 311 transitions, 2842 flow [2024-11-20 17:47:49,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 17:47:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 17:47:49,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 270 transitions. [2024-11-20 17:47:49,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3375 [2024-11-20 17:47:49,847 INFO L175 Difference]: Start difference. First operand has 90 places, 76 transitions, 503 flow. Second operand 16 states and 270 transitions. [2024-11-20 17:47:49,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 311 transitions, 2842 flow [2024-11-20 17:47:49,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 311 transitions, 2832 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:49,917 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 870 flow [2024-11-20 17:47:49,917 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=870, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2024-11-20 17:47:49,918 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 55 predicate places. [2024-11-20 17:47:49,918 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 870 flow [2024-11-20 17:47:49,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.947368421052632) internal successors, (208), 19 states have internal predecessors, (208), 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 17:47:49,918 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:49,918 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:49,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-20 17:47:50,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-20 17:47:50,119 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:50,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:50,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1859948197, now seen corresponding path program 10 times [2024-11-20 17:47:50,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:50,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962863541] [2024-11-20 17:47:50,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:50,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:50,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:50,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962863541] [2024-11-20 17:47:50,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962863541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:50,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995929055] [2024-11-20 17:47:50,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 17:47:50,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:50,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:50,237 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:50,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 17:47:50,319 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 17:47:50,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:50,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:47:50,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:50,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:50,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995929055] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:50,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:50,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2024-11-20 17:47:50,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624921283] [2024-11-20 17:47:50,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:50,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:47:50,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:50,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:47:50,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:47:50,581 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-11-20 17:47:50,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 870 flow. Second operand has 20 states, 20 states have (on average 10.5) internal successors, (210), 20 states have internal predecessors, (210), 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 17:47:50,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:50,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-11-20 17:47:50,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:55,647 INFO L124 PetriNetUnfolderBase]: 29666/41747 cut-off events. [2024-11-20 17:47:55,647 INFO L125 PetriNetUnfolderBase]: For 171487/171487 co-relation queries the response was YES. [2024-11-20 17:47:55,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182427 conditions, 41747 events. 29666/41747 cut-off events. For 171487/171487 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 245555 event pairs, 1528 based on Foata normal form. 54/41801 useless extension candidates. Maximal degree in co-relation 182398. Up to 5880 conditions per place. [2024-11-20 17:47:55,937 INFO L140 encePairwiseOnDemand]: 33/50 looper letters, 550 selfloop transitions, 596 changer transitions 0/1147 dead transitions. [2024-11-20 17:47:55,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 1147 transitions, 10971 flow [2024-11-20 17:47:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-20 17:47:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-11-20 17:47:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 932 transitions. [2024-11-20 17:47:55,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33285714285714285 [2024-11-20 17:47:55,940 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 870 flow. Second operand 56 states and 932 transitions. [2024-11-20 17:47:55,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 1147 transitions, 10971 flow [2024-11-20 17:47:57,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 1147 transitions, 10747 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-11-20 17:47:57,252 INFO L231 Difference]: Finished difference. Result has 184 places, 691 transitions, 7929 flow [2024-11-20 17:47:57,252 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=7929, PETRI_PLACES=184, PETRI_TRANSITIONS=691} [2024-11-20 17:47:57,253 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 132 predicate places. [2024-11-20 17:47:57,253 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 691 transitions, 7929 flow [2024-11-20 17:47:57,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.5) internal successors, (210), 20 states have internal predecessors, (210), 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 17:47:57,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:57,253 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:57,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-20 17:47:57,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-20 17:47:57,454 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-20 17:47:57,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1375860683, now seen corresponding path program 11 times [2024-11-20 17:47:57,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:57,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397738244] [2024-11-20 17:47:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:57,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:47:57,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:57,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397738244] [2024-11-20 17:47:57,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397738244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:57,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652344489] [2024-11-20 17:47:57,581 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 17:47:57,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:57,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:57,584 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:47:57,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-20 17:47:57,668 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-20 17:47:57,668 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:57,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:47:57,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:57,750 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:57,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652344489] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:57,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:57,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2024-11-20 17:47:57,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550679394] [2024-11-20 17:47:57,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:57,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:47:57,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:47:57,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:47:57,869 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2024-11-20 17:47:57,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 691 transitions, 7929 flow. Second operand has 18 states, 18 states have (on average 9.88888888888889) internal successors, (178), 18 states have internal predecessors, (178), 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 17:47:57,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:57,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2024-11-20 17:47:57,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:10,228 INFO L124 PetriNetUnfolderBase]: 45549/63503 cut-off events. [2024-11-20 17:48:10,229 INFO L125 PetriNetUnfolderBase]: For 643427/643427 co-relation queries the response was YES. [2024-11-20 17:48:10,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355545 conditions, 63503 events. 45549/63503 cut-off events. For 643427/643427 co-relation queries the response was YES. Maximal size of possible extension queue 1458. Compared 385100 event pairs, 1746 based on Foata normal form. 44/63547 useless extension candidates. Maximal degree in co-relation 355489. Up to 8292 conditions per place. [2024-11-20 17:48:10,943 INFO L140 encePairwiseOnDemand]: 34/50 looper letters, 1265 selfloop transitions, 1364 changer transitions 0/2630 dead transitions. [2024-11-20 17:48:10,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 2630 transitions, 34723 flow [2024-11-20 17:48:10,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-11-20 17:48:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2024-11-20 17:48:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 1625 transitions. [2024-11-20 17:48:10,947 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3217821782178218 [2024-11-20 17:48:10,947 INFO L175 Difference]: Start difference. First operand has 184 places, 691 transitions, 7929 flow. Second operand 101 states and 1625 transitions. [2024-11-20 17:48:10,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 2630 transitions, 34723 flow