./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/chl-chromosome-trans.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/chl-chromosome-trans.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 f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:39:26,385 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:39:26,425 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:39:26,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:39:26,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:39:26,454 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:39:26,454 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:39:26,455 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:39:26,464 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:39:26,468 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:39:26,468 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:39:26,469 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:39:26,469 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:39:26,469 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:39:26,469 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:39:26,470 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:39:26,470 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:39:26,470 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:39:26,471 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:39:26,472 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:39:26,472 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:39:26,472 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:39:26,472 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:39:26,472 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:39:26,473 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:39:26,473 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:39:26,473 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:39:26,473 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:39:26,473 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:39:26,474 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:39:26,474 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:39:26,474 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:39:26,474 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:39:26,474 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:39:26,474 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:39:26,474 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:39:26,475 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:39:26,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:39:26,475 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:39:26,475 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:39:26,475 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:39:26,476 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:39:26,476 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f36f5593156fc25b34b4c706b0d898a2d66ee8bab5f6d91cd69ff9cf3c129193 [2024-11-20 17:39:26,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:39:26,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:39:26,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:39:26,670 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:39:26,670 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:39:26,671 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-20 17:39:27,937 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:39:28,083 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:39:28,084 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-trans.wvr.c [2024-11-20 17:39:28,091 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/696006566/52e50728181f40829a53e4cfa71a1d4f/FLAGed4ad513a [2024-11-20 17:39:28,108 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/696006566/52e50728181f40829a53e4cfa71a1d4f [2024-11-20 17:39:28,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:39:28,113 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:39:28,114 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:39:28,114 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:39:28,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:39:28,120 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,121 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b837ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28, skipping insertion in model container [2024-11-20 17:39:28,121 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,144 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:39:28,327 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 17:39:28,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:39:28,343 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:39:28,371 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:39:28,388 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:39:28,388 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28 WrapperNode [2024-11-20 17:39:28,388 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:39:28,389 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:39:28,389 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:39:28,389 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:39:28,394 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,401 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,426 INFO L138 Inliner]: procedures = 25, calls = 32, calls flagged for inlining = 17, calls inlined = 25, statements flattened = 269 [2024-11-20 17:39:28,426 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:39:28,427 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:39:28,427 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:39:28,427 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:39:28,435 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,435 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,438 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,450 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-20 17:39:28,451 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,451 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,461 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,469 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,471 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,472 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,474 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:39:28,475 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:39:28,475 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:39:28,475 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:39:28,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (1/1) ... [2024-11-20 17:39:28,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:39:28,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:28,503 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 17:39:28,505 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 17:39:28,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:39:28,538 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:39:28,538 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:39:28,539 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:39:28,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:39:28,539 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 17:39:28,539 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 17:39:28,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:39:28,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:39:28,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:39:28,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:39:28,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:39:28,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:39:28,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:39:28,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:39:28,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:39:28,541 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 17:39:28,620 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:39:28,621 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:39:28,999 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:39:29,000 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:39:29,313 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:39:29,313 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-20 17:39:29,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:39:29 BoogieIcfgContainer [2024-11-20 17:39:29,313 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:39:29,315 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:39:29,316 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:39:29,318 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:39:29,318 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:39:28" (1/3) ... [2024-11-20 17:39:29,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2b7062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:39:29, skipping insertion in model container [2024-11-20 17:39:29,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:28" (2/3) ... [2024-11-20 17:39:29,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2b7062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:39:29, skipping insertion in model container [2024-11-20 17:39:29,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:39:29" (3/3) ... [2024-11-20 17:39:29,320 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2024-11-20 17:39:29,333 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:39:29,333 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-20 17:39:29,334 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:39:29,386 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:39:29,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-11-20 17:39:29,436 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-11-20 17:39:29,436 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:39:29,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 150 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-11-20 17:39:29,439 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-11-20 17:39:29,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-11-20 17:39:29,450 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:39:29,455 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@144a125b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:39:29,455 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-20 17:39:29,457 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:39:29,457 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:39:29,457 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:39:29,458 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:29,458 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:39:29,458 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:29,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:29,462 INFO L85 PathProgramCache]: Analyzing trace with hash 867015, now seen corresponding path program 1 times [2024-11-20 17:39:29,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:29,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553474330] [2024-11-20 17:39:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:29,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:29,647 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 17:39:29,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:29,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553474330] [2024-11-20 17:39:29,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553474330] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:29,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:29,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:39:29,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921387913] [2024-11-20 17:39:29,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:29,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:39:29,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:29,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:39:29,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:39:29,718 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:39:29,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 17:39:29,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:29,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:39:29,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:29,848 INFO L124 PetriNetUnfolderBase]: 202/443 cut-off events. [2024-11-20 17:39:29,848 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-20 17:39:29,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 443 events. 202/443 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2067 event pairs, 124 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 672. Up to 293 conditions per place. [2024-11-20 17:39:29,855 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-20 17:39:29,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 178 flow [2024-11-20 17:39:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:39:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:39:29,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-11-20 17:39:29,865 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-20 17:39:29,866 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2024-11-20 17:39:29,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 178 flow [2024-11-20 17:39:29,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:29,873 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-11-20 17:39:29,875 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-11-20 17:39:29,879 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-20 17:39:29,879 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-11-20 17:39:29,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 17:39:29,879 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:29,880 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:39:29,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:39:29,880 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:29,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:29,881 INFO L85 PathProgramCache]: Analyzing trace with hash 867016, now seen corresponding path program 1 times [2024-11-20 17:39:29,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:29,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178466663] [2024-11-20 17:39:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:29,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:30,068 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 17:39:30,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:30,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178466663] [2024-11-20 17:39:30,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178466663] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:30,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:30,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:39:30,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794352268] [2024-11-20 17:39:30,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:30,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:30,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:30,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:30,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:30,122 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:39:30,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 17:39:30,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:30,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:39:30,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:30,252 INFO L124 PetriNetUnfolderBase]: 202/449 cut-off events. [2024-11-20 17:39:30,253 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:39:30,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 449 events. 202/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2068 event pairs, 124 based on Foata normal form. 1/364 useless extension candidates. Maximal degree in co-relation 734. Up to 305 conditions per place. [2024-11-20 17:39:30,255 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 32 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2024-11-20 17:39:30,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 200 flow [2024-11-20 17:39:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:39:30,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:39:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-11-20 17:39:30,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-11-20 17:39:30,259 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2024-11-20 17:39:30,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 200 flow [2024-11-20 17:39:30,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:30,261 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 146 flow [2024-11-20 17:39:30,261 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2024-11-20 17:39:30,262 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-20 17:39:30,263 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 146 flow [2024-11-20 17:39:30,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 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 17:39:30,263 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:30,263 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:39:30,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:39:30,264 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:30,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:30,265 INFO L85 PathProgramCache]: Analyzing trace with hash 833230439, now seen corresponding path program 1 times [2024-11-20 17:39:30,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:30,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484410497] [2024-11-20 17:39:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:30,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:30,409 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 17:39:30,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:30,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484410497] [2024-11-20 17:39:30,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484410497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:30,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964119597] [2024-11-20 17:39:30,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:30,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:30,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:30,414 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 17:39:30,425 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 17:39:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:30,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 17:39:30,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:30,524 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 6 treesize of output 5 [2024-11-20 17:39:30,564 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 17:39:30,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:30,616 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 17:39:30,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964119597] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:30,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:30,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-20 17:39:30,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189466164] [2024-11-20 17:39:30,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:30,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 17:39:30,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 17:39:30,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-20 17:39:30,776 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:39:30,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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 17:39:30,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:30,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:39:30,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:30,996 INFO L124 PetriNetUnfolderBase]: 211/476 cut-off events. [2024-11-20 17:39:30,996 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:39:30,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864 conditions, 476 events. 211/476 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2191 event pairs, 124 based on Foata normal form. 0/392 useless extension candidates. Maximal degree in co-relation 769. Up to 308 conditions per place. [2024-11-20 17:39:31,001 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 41 selfloop transitions, 24 changer transitions 0/84 dead transitions. [2024-11-20 17:39:31,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 378 flow [2024-11-20 17:39:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-11-20 17:39:31,003 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-20 17:39:31,003 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 146 flow. Second operand 6 states and 230 transitions. [2024-11-20 17:39:31,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 378 flow [2024-11-20 17:39:31,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 84 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:39:31,007 INFO L231 Difference]: Finished difference. Result has 59 places, 72 transitions, 313 flow [2024-11-20 17:39:31,007 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=313, PETRI_PLACES=59, PETRI_TRANSITIONS=72} [2024-11-20 17:39:31,008 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-11-20 17:39:31,008 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 72 transitions, 313 flow [2024-11-20 17:39:31,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 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 17:39:31,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:31,008 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-20 17:39:31,016 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 17:39:31,209 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 17:39:31,209 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:31,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash -431889724, now seen corresponding path program 2 times [2024-11-20 17:39:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:31,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56195903] [2024-11-20 17:39:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:31,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:31,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:31,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56195903] [2024-11-20 17:39:31,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56195903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:31,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570658528] [2024-11-20 17:39:31,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:39:31,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:31,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:31,501 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 17:39:31,503 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 17:39:31,562 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:39:31,562 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:39:31,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:39:31,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:31,571 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 6 treesize of output 5 [2024-11-20 17:39:31,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:31,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:31,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570658528] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:31,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:31,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-20 17:39:31,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417592377] [2024-11-20 17:39:31,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:31,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:39:31,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:31,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:39:31,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:39:32,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:39:32,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 72 transitions, 313 flow. Second operand has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 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 17:39:32,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:32,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:39:32,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:33,143 INFO L124 PetriNetUnfolderBase]: 214/485 cut-off events. [2024-11-20 17:39:33,144 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-20 17:39:33,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 485 events. 214/485 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2263 event pairs, 124 based on Foata normal form. 3/407 useless extension candidates. Maximal degree in co-relation 813. Up to 309 conditions per place. [2024-11-20 17:39:33,146 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 44 selfloop transitions, 30 changer transitions 0/93 dead transitions. [2024-11-20 17:39:33,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 93 transitions, 527 flow [2024-11-20 17:39:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:39:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:39:33,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 259 transitions. [2024-11-20 17:39:33,148 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-20 17:39:33,148 INFO L175 Difference]: Start difference. First operand has 59 places, 72 transitions, 313 flow. Second operand 7 states and 259 transitions. [2024-11-20 17:39:33,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 93 transitions, 527 flow [2024-11-20 17:39:33,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 93 transitions, 489 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-20 17:39:33,153 INFO L231 Difference]: Finished difference. Result has 65 places, 78 transitions, 394 flow [2024-11-20 17:39:33,154 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=394, PETRI_PLACES=65, PETRI_TRANSITIONS=78} [2024-11-20 17:39:33,154 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2024-11-20 17:39:33,155 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 78 transitions, 394 flow [2024-11-20 17:39:33,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 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 17:39:33,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:33,156 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1] [2024-11-20 17:39:33,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:33,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-20 17:39:33,360 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:33,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:33,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1565831011, now seen corresponding path program 3 times [2024-11-20 17:39:33,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:33,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403534227] [2024-11-20 17:39:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:33,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:33,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:33,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403534227] [2024-11-20 17:39:33,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403534227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:33,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625619458] [2024-11-20 17:39:33,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:39:33,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:33,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:33,479 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 17:39:33,480 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 17:39:33,537 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:39:33,537 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:39:33,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:39:33,539 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:33,553 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 6 treesize of output 5 [2024-11-20 17:39:33,646 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-20 17:39:33,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-20 17:39:33,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625619458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:33,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:33,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 13 [2024-11-20 17:39:33,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074179627] [2024-11-20 17:39:33,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:33,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:39:33,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:33,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:39:33,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:39:33,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:39:33,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 394 flow. Second operand has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 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 17:39:33,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:33,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:39:33,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:34,339 INFO L124 PetriNetUnfolderBase]: 208/473 cut-off events. [2024-11-20 17:39:34,340 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-20 17:39:34,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 473 events. 208/473 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2139 event pairs, 124 based on Foata normal form. 6/398 useless extension candidates. Maximal degree in co-relation 837. Up to 296 conditions per place. [2024-11-20 17:39:34,343 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 25 selfloop transitions, 37 changer transitions 0/81 dead transitions. [2024-11-20 17:39:34,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 459 flow [2024-11-20 17:39:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 17:39:34,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 17:39:34,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 354 transitions. [2024-11-20 17:39:34,345 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-11-20 17:39:34,345 INFO L175 Difference]: Start difference. First operand has 65 places, 78 transitions, 394 flow. Second operand 11 states and 354 transitions. [2024-11-20 17:39:34,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 459 flow [2024-11-20 17:39:34,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 81 transitions, 369 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-20 17:39:34,348 INFO L231 Difference]: Finished difference. Result has 64 places, 81 transitions, 331 flow [2024-11-20 17:39:34,349 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=331, PETRI_PLACES=64, PETRI_TRANSITIONS=81} [2024-11-20 17:39:34,349 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 4 predicate places. [2024-11-20 17:39:34,350 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 81 transitions, 331 flow [2024-11-20 17:39:34,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 27.785714285714285) internal successors, (389), 14 states have internal predecessors, (389), 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 17:39:34,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:34,350 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:34,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:34,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:34,551 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:34,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:34,552 INFO L85 PathProgramCache]: Analyzing trace with hash -590761488, now seen corresponding path program 1 times [2024-11-20 17:39:34,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:34,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243813695] [2024-11-20 17:39:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:34,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:39:34,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:34,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243813695] [2024-11-20 17:39:34,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243813695] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:34,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694608610] [2024-11-20 17:39:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:34,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:34,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:34,651 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 17:39:34,652 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 17:39:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:34,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:39:34,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:39:34,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:39:34,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694608610] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:34,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:34,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-20 17:39:34,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650339011] [2024-11-20 17:39:34,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:34,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:39:34,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:34,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:39:34,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:39:34,829 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-20 17:39:34,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 81 transitions, 331 flow. Second operand has 10 states, 10 states have (on average 31.6) internal successors, (316), 10 states have internal predecessors, (316), 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 17:39:34,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:34,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-20 17:39:34,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:34,960 INFO L124 PetriNetUnfolderBase]: 199/464 cut-off events. [2024-11-20 17:39:34,961 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-20 17:39:34,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 464 events. 199/464 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2056 event pairs, 124 based on Foata normal form. 9/392 useless extension candidates. Maximal degree in co-relation 739. Up to 296 conditions per place. [2024-11-20 17:39:34,963 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 35 selfloop transitions, 18 changer transitions 0/72 dead transitions. [2024-11-20 17:39:34,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 72 transitions, 376 flow [2024-11-20 17:39:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:39:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:39:34,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 265 transitions. [2024-11-20 17:39:34,964 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-20 17:39:34,964 INFO L175 Difference]: Start difference. First operand has 64 places, 81 transitions, 331 flow. Second operand 7 states and 265 transitions. [2024-11-20 17:39:34,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 72 transitions, 376 flow [2024-11-20 17:39:34,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 322 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-11-20 17:39:34,968 INFO L231 Difference]: Finished difference. Result has 61 places, 72 transitions, 252 flow [2024-11-20 17:39:34,968 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=61, PETRI_TRANSITIONS=72} [2024-11-20 17:39:34,969 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-20 17:39:34,969 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 72 transitions, 252 flow [2024-11-20 17:39:34,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.6) internal successors, (316), 10 states have internal predecessors, (316), 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 17:39:34,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:34,969 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:34,981 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 17:39:35,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:35,170 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:35,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:35,171 INFO L85 PathProgramCache]: Analyzing trace with hash -929484259, now seen corresponding path program 2 times [2024-11-20 17:39:35,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:35,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607572615] [2024-11-20 17:39:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:35,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 17:39:35,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:35,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607572615] [2024-11-20 17:39:35,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607572615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:35,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:35,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:39:35,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523007848] [2024-11-20 17:39:35,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:35,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:35,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:35,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:35,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-20 17:39:35,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 72 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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 17:39:35,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:35,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-20 17:39:35,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:35,510 INFO L124 PetriNetUnfolderBase]: 325/634 cut-off events. [2024-11-20 17:39:35,510 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-20 17:39:35,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 634 events. 325/634 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2770 event pairs, 221 based on Foata normal form. 0/587 useless extension candidates. Maximal degree in co-relation 1090. Up to 472 conditions per place. [2024-11-20 17:39:35,514 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 52 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-11-20 17:39:35,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 358 flow [2024-11-20 17:39:35,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-20 17:39:35,515 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-11-20 17:39:35,515 INFO L175 Difference]: Start difference. First operand has 61 places, 72 transitions, 252 flow. Second operand 5 states and 143 transitions. [2024-11-20 17:39:35,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 358 flow [2024-11-20 17:39:35,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 322 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:35,517 INFO L231 Difference]: Finished difference. Result has 57 places, 70 transitions, 218 flow [2024-11-20 17:39:35,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=57, PETRI_TRANSITIONS=70} [2024-11-20 17:39:35,518 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -3 predicate places. [2024-11-20 17:39:35,518 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 70 transitions, 218 flow [2024-11-20 17:39:35,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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 17:39:35,518 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:35,519 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:35,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:39:35,519 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:35,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:35,519 INFO L85 PathProgramCache]: Analyzing trace with hash -929484258, now seen corresponding path program 1 times [2024-11-20 17:39:35,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:35,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898229463] [2024-11-20 17:39:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:35,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-20 17:39:36,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:36,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898229463] [2024-11-20 17:39:36,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898229463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:36,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224810270] [2024-11-20 17:39:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:36,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:36,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:36,007 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 17:39:36,007 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 17:39:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:36,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-20 17:39:36,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:36,114 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 17:39:36,119 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 6 treesize of output 5 [2024-11-20 17:39:36,223 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-20 17:39:36,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-20 17:39:36,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 17:39:36,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:39:36,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:39:36,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-20 17:39:36,556 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-20 17:39:36,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-20 17:39:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:36,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:37,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224810270] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:37,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:39:37,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 25 [2024-11-20 17:39:37,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215735083] [2024-11-20 17:39:37,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:37,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:39:37,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:37,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:39:37,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-20 17:39:37,968 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:39:37,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 70 transitions, 218 flow. Second operand has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 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 17:39:37,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:37,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:39:37,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:38,344 INFO L124 PetriNetUnfolderBase]: 575/1059 cut-off events. [2024-11-20 17:39:38,344 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:39:38,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1996 conditions, 1059 events. 575/1059 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5215 event pairs, 221 based on Foata normal form. 0/951 useless extension candidates. Maximal degree in co-relation 1889. Up to 440 conditions per place. [2024-11-20 17:39:38,349 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 67 selfloop transitions, 7 changer transitions 0/88 dead transitions. [2024-11-20 17:39:38,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 407 flow [2024-11-20 17:39:38,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:39:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:39:38,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-11-20 17:39:38,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-11-20 17:39:38,350 INFO L175 Difference]: Start difference. First operand has 57 places, 70 transitions, 218 flow. Second operand 7 states and 233 transitions. [2024-11-20 17:39:38,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 407 flow [2024-11-20 17:39:38,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 88 transitions, 402 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:39:38,352 INFO L231 Difference]: Finished difference. Result has 62 places, 71 transitions, 240 flow [2024-11-20 17:39:38,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=62, PETRI_TRANSITIONS=71} [2024-11-20 17:39:38,353 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2024-11-20 17:39:38,353 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 71 transitions, 240 flow [2024-11-20 17:39:38,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 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 17:39:38,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:38,353 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:38,360 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 17:39:38,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:38,558 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:38,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:38,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1250759900, now seen corresponding path program 1 times [2024-11-20 17:39:38,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:38,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640332255] [2024-11-20 17:39:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:38,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:38,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:38,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640332255] [2024-11-20 17:39:38,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640332255] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:38,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455080616] [2024-11-20 17:39:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:38,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:38,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:38,954 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 17:39:38,954 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 17:39:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:39,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-20 17:39:39,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:39,058 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 6 treesize of output 5 [2024-11-20 17:39:39,064 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 17:39:39,125 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:39:39,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-20 17:39:39,135 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:39,136 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 11 treesize of output 11 [2024-11-20 17:39:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:39,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:39,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455080616] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:39,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:39:39,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-20 17:39:39,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794808401] [2024-11-20 17:39:39,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:39,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:39:39,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:39,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:39:39,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-20 17:39:39,933 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-20 17:39:39,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 71 transitions, 240 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 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 17:39:39,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:39,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-20 17:39:39,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:40,100 INFO L124 PetriNetUnfolderBase]: 397/811 cut-off events. [2024-11-20 17:39:40,100 INFO L125 PetriNetUnfolderBase]: For 171/171 co-relation queries the response was YES. [2024-11-20 17:39:40,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1682 conditions, 811 events. 397/811 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3976 event pairs, 169 based on Foata normal form. 26/761 useless extension candidates. Maximal degree in co-relation 1571. Up to 377 conditions per place. [2024-11-20 17:39:40,104 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 66 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2024-11-20 17:39:40,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 88 transitions, 425 flow [2024-11-20 17:39:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:40,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-11-20 17:39:40,105 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-20 17:39:40,105 INFO L175 Difference]: Start difference. First operand has 62 places, 71 transitions, 240 flow. Second operand 6 states and 216 transitions. [2024-11-20 17:39:40,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 88 transitions, 425 flow [2024-11-20 17:39:40,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 88 transitions, 414 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:40,107 INFO L231 Difference]: Finished difference. Result has 63 places, 72 transitions, 251 flow [2024-11-20 17:39:40,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=251, PETRI_PLACES=63, PETRI_TRANSITIONS=72} [2024-11-20 17:39:40,108 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2024-11-20 17:39:40,108 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 72 transitions, 251 flow [2024-11-20 17:39:40,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 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 17:39:40,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:40,108 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:40,115 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 17:39:40,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:40,309 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:40,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:40,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1250759899, now seen corresponding path program 1 times [2024-11-20 17:39:40,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:40,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442613512] [2024-11-20 17:39:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:40,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 17:39:40,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:40,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442613512] [2024-11-20 17:39:40,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442613512] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:40,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:40,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:39:40,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541080306] [2024-11-20 17:39:40,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:40,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:40,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:40,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:40,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:40,514 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-20 17:39:40,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 72 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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 17:39:40,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:40,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-20 17:39:40,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:40,621 INFO L124 PetriNetUnfolderBase]: 445/917 cut-off events. [2024-11-20 17:39:40,621 INFO L125 PetriNetUnfolderBase]: For 539/594 co-relation queries the response was YES. [2024-11-20 17:39:40,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1984 conditions, 917 events. 445/917 cut-off events. For 539/594 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4910 event pairs, 315 based on Foata normal form. 62/875 useless extension candidates. Maximal degree in co-relation 1872. Up to 650 conditions per place. [2024-11-20 17:39:40,625 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 52 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-11-20 17:39:40,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 70 transitions, 357 flow [2024-11-20 17:39:40,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:40,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-11-20 17:39:40,626 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-11-20 17:39:40,626 INFO L175 Difference]: Start difference. First operand has 63 places, 72 transitions, 251 flow. Second operand 5 states and 147 transitions. [2024-11-20 17:39:40,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 70 transitions, 357 flow [2024-11-20 17:39:40,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 70 transitions, 349 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:39:40,628 INFO L231 Difference]: Finished difference. Result has 61 places, 70 transitions, 245 flow [2024-11-20 17:39:40,628 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=61, PETRI_TRANSITIONS=70} [2024-11-20 17:39:40,628 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-20 17:39:40,629 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 70 transitions, 245 flow [2024-11-20 17:39:40,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 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 17:39:40,629 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:40,629 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:40,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 17:39:40,629 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:40,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:40,630 INFO L85 PathProgramCache]: Analyzing trace with hash 69792213, now seen corresponding path program 1 times [2024-11-20 17:39:40,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:40,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629472795] [2024-11-20 17:39:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:40,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:40,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:40,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629472795] [2024-11-20 17:39:40,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629472795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:40,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445370474] [2024-11-20 17:39:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:40,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:40,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:40,983 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 17:39:40,983 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 17:39:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:41,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-20 17:39:41,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:41,093 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 6 treesize of output 5 [2024-11-20 17:39:41,100 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 17:39:41,157 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:41,157 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 11 treesize of output 11 [2024-11-20 17:39:41,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 17:39:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:41,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:41,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445370474] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:41,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:39:41,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-20 17:39:41,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597736483] [2024-11-20 17:39:41,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:41,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:39:41,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:41,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:39:41,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-20 17:39:41,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-20 17:39:41,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 70 transitions, 245 flow. Second operand has 10 states, 10 states have (on average 29.3) internal successors, (293), 10 states have internal predecessors, (293), 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 17:39:41,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:41,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-20 17:39:41,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:42,092 INFO L124 PetriNetUnfolderBase]: 772/1467 cut-off events. [2024-11-20 17:39:42,093 INFO L125 PetriNetUnfolderBase]: For 712/815 co-relation queries the response was YES. [2024-11-20 17:39:42,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3182 conditions, 1467 events. 772/1467 cut-off events. For 712/815 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8295 event pairs, 315 based on Foata normal form. 0/1278 useless extension candidates. Maximal degree in co-relation 3070. Up to 604 conditions per place. [2024-11-20 17:39:42,101 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 66 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2024-11-20 17:39:42,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 86 transitions, 440 flow [2024-11-20 17:39:42,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:42,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:42,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-11-20 17:39:42,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-11-20 17:39:42,103 INFO L175 Difference]: Start difference. First operand has 61 places, 70 transitions, 245 flow. Second operand 6 states and 209 transitions. [2024-11-20 17:39:42,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 86 transitions, 440 flow [2024-11-20 17:39:42,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 435 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:39:42,104 INFO L231 Difference]: Finished difference. Result has 65 places, 71 transitions, 265 flow [2024-11-20 17:39:42,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=65, PETRI_TRANSITIONS=71} [2024-11-20 17:39:42,105 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2024-11-20 17:39:42,106 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 71 transitions, 265 flow [2024-11-20 17:39:42,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.3) internal successors, (293), 10 states have internal predecessors, (293), 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 17:39:42,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:42,106 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:42,112 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 17:39:42,310 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 17:39:42,311 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:42,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:42,311 INFO L85 PathProgramCache]: Analyzing trace with hash -2131407859, now seen corresponding path program 1 times [2024-11-20 17:39:42,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:42,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288883946] [2024-11-20 17:39:42,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:42,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-20 17:39:42,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:42,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288883946] [2024-11-20 17:39:42,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288883946] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:42,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:42,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:39:42,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753497528] [2024-11-20 17:39:42,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:42,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:42,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:42,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:42,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:42,419 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-20 17:39:42,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 71 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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 17:39:42,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:42,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-20 17:39:42,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:42,530 INFO L124 PetriNetUnfolderBase]: 517/1052 cut-off events. [2024-11-20 17:39:42,530 INFO L125 PetriNetUnfolderBase]: For 751/853 co-relation queries the response was YES. [2024-11-20 17:39:42,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2484 conditions, 1052 events. 517/1052 cut-off events. For 751/853 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5713 event pairs, 406 based on Foata normal form. 36/1012 useless extension candidates. Maximal degree in co-relation 2369. Up to 773 conditions per place. [2024-11-20 17:39:42,535 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 52 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2024-11-20 17:39:42,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 69 transitions, 369 flow [2024-11-20 17:39:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:39:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:39:42,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-20 17:39:42,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-11-20 17:39:42,537 INFO L175 Difference]: Start difference. First operand has 65 places, 71 transitions, 265 flow. Second operand 4 states and 127 transitions. [2024-11-20 17:39:42,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 69 transitions, 369 flow [2024-11-20 17:39:42,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 361 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:39:42,538 INFO L231 Difference]: Finished difference. Result has 62 places, 69 transitions, 257 flow [2024-11-20 17:39:42,538 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=257, PETRI_PLACES=62, PETRI_TRANSITIONS=69} [2024-11-20 17:39:42,540 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2024-11-20 17:39:42,540 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 69 transitions, 257 flow [2024-11-20 17:39:42,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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 17:39:42,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:42,540 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:42,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 17:39:42,541 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:42,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:42,541 INFO L85 PathProgramCache]: Analyzing trace with hash -2131407858, now seen corresponding path program 1 times [2024-11-20 17:39:42,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:42,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715344443] [2024-11-20 17:39:42,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:42,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:42,806 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:42,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:42,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715344443] [2024-11-20 17:39:42,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715344443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:42,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815184220] [2024-11-20 17:39:42,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:42,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:42,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:42,810 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 17:39:42,811 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 17:39:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:42,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 17:39:42,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:43,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:43,087 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 17:39:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:43,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815184220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:43,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:43,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-20 17:39:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212665410] [2024-11-20 17:39:43,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:43,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 17:39:43,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:43,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 17:39:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-20 17:39:43,620 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-20 17:39:43,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 69 transitions, 257 flow. Second operand has 25 states, 25 states have (on average 30.24) internal successors, (756), 25 states have internal predecessors, (756), 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 17:39:43,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:43,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-20 17:39:43,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:44,071 INFO L124 PetriNetUnfolderBase]: 885/1710 cut-off events. [2024-11-20 17:39:44,071 INFO L125 PetriNetUnfolderBase]: For 1030/1149 co-relation queries the response was YES. [2024-11-20 17:39:44,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4136 conditions, 1710 events. 885/1710 cut-off events. For 1030/1149 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9824 event pairs, 315 based on Foata normal form. 92/1720 useless extension candidates. Maximal degree in co-relation 4021. Up to 650 conditions per place. [2024-11-20 17:39:44,082 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 68 selfloop transitions, 19 changer transitions 0/101 dead transitions. [2024-11-20 17:39:44,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 539 flow [2024-11-20 17:39:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:39:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:39:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 366 transitions. [2024-11-20 17:39:44,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-11-20 17:39:44,083 INFO L175 Difference]: Start difference. First operand has 62 places, 69 transitions, 257 flow. Second operand 10 states and 366 transitions. [2024-11-20 17:39:44,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 539 flow [2024-11-20 17:39:44,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 101 transitions, 536 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:44,085 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 312 flow [2024-11-20 17:39:44,086 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=312, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-11-20 17:39:44,086 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 11 predicate places. [2024-11-20 17:39:44,086 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 312 flow [2024-11-20 17:39:44,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.24) internal successors, (756), 25 states have internal predecessors, (756), 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 17:39:44,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:44,088 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:44,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:44,291 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,SelfDestructingSolverStorable12 [2024-11-20 17:39:44,291 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:44,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:44,292 INFO L85 PathProgramCache]: Analyzing trace with hash -610549791, now seen corresponding path program 1 times [2024-11-20 17:39:44,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:44,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55271409] [2024-11-20 17:39:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:44,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-20 17:39:44,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:44,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55271409] [2024-11-20 17:39:44,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55271409] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:44,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583230686] [2024-11-20 17:39:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:44,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:44,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:44,915 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 17:39:44,916 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 17:39:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:45,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-20 17:39:45,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:45,036 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 6 treesize of output 5 [2024-11-20 17:39:45,040 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 17:39:45,097 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 17:39:45,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-20 17:39:45,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 17:39:45,181 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:39:45,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-20 17:39:45,192 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:45,193 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 11 treesize of output 11 [2024-11-20 17:39:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:45,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:45,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583230686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:45,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:45,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 33 [2024-11-20 17:39:45,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178827605] [2024-11-20 17:39:45,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:45,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-20 17:39:45,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:45,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-20 17:39:45,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2024-11-20 17:39:47,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-11-20 17:39:47,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 312 flow. Second operand has 35 states, 35 states have (on average 20.057142857142857) internal successors, (702), 35 states have internal predecessors, (702), 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 17:39:47,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:47,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-11-20 17:39:47,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:48,042 INFO L124 PetriNetUnfolderBase]: 3231/5492 cut-off events. [2024-11-20 17:39:48,042 INFO L125 PetriNetUnfolderBase]: For 6162/6327 co-relation queries the response was YES. [2024-11-20 17:39:48,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14868 conditions, 5492 events. 3231/5492 cut-off events. For 6162/6327 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 34952 event pairs, 567 based on Foata normal form. 216/5661 useless extension candidates. Maximal degree in co-relation 14736. Up to 1084 conditions per place. [2024-11-20 17:39:48,073 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 137 selfloop transitions, 19 changer transitions 0/167 dead transitions. [2024-11-20 17:39:48,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 167 transitions, 982 flow [2024-11-20 17:39:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 17:39:48,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 17:39:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 391 transitions. [2024-11-20 17:39:48,077 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4654761904761905 [2024-11-20 17:39:48,077 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 312 flow. Second operand 14 states and 391 transitions. [2024-11-20 17:39:48,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 167 transitions, 982 flow [2024-11-20 17:39:48,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 167 transitions, 951 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:48,082 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 364 flow [2024-11-20 17:39:48,082 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=364, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2024-11-20 17:39:48,082 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 22 predicate places. [2024-11-20 17:39:48,083 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 364 flow [2024-11-20 17:39:48,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 20.057142857142857) internal successors, (702), 35 states have internal predecessors, (702), 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 17:39:48,083 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:48,083 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:48,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 17:39:48,283 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,SelfDestructingSolverStorable13 [2024-11-20 17:39:48,284 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:48,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:48,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1681778331, now seen corresponding path program 1 times [2024-11-20 17:39:48,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:48,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686076037] [2024-11-20 17:39:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:48,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-20 17:39:48,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:48,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686076037] [2024-11-20 17:39:48,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686076037] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:48,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336024573] [2024-11-20 17:39:48,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:48,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:48,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:48,773 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 17:39:48,775 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 17:39:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:48,873 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-20 17:39:48,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:48,880 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 17:39:48,889 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 6 treesize of output 5 [2024-11-20 17:39:48,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:39:48,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 17:39:48,957 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-20 17:39:48,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-20 17:39:49,079 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-20 17:39:49,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-20 17:39:49,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 17:39:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:49,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:49,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336024573] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:49,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:39:49,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 28 [2024-11-20 17:39:49,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513808830] [2024-11-20 17:39:49,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:49,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:39:49,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:49,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:39:49,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2024-11-20 17:39:50,153 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:39:50,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 364 flow. Second operand has 11 states, 11 states have (on average 28.272727272727273) internal successors, (311), 11 states have internal predecessors, (311), 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 17:39:50,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:50,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:39:50,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:51,066 INFO L124 PetriNetUnfolderBase]: 4996/8536 cut-off events. [2024-11-20 17:39:51,066 INFO L125 PetriNetUnfolderBase]: For 15497/15966 co-relation queries the response was YES. [2024-11-20 17:39:51,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24564 conditions, 8536 events. 4996/8536 cut-off events. For 15497/15966 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 59204 event pairs, 2535 based on Foata normal form. 0/8222 useless extension candidates. Maximal degree in co-relation 24431. Up to 4170 conditions per place. [2024-11-20 17:39:51,110 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 79 selfloop transitions, 7 changer transitions 0/97 dead transitions. [2024-11-20 17:39:51,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 97 transitions, 671 flow [2024-11-20 17:39:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:39:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:39:51,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-20 17:39:51,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5452380952380952 [2024-11-20 17:39:51,114 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 364 flow. Second operand 7 states and 229 transitions. [2024-11-20 17:39:51,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 97 transitions, 671 flow [2024-11-20 17:39:51,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 97 transitions, 664 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:39:51,122 INFO L231 Difference]: Finished difference. Result has 87 places, 76 transitions, 386 flow [2024-11-20 17:39:51,122 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=386, PETRI_PLACES=87, PETRI_TRANSITIONS=76} [2024-11-20 17:39:51,122 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 27 predicate places. [2024-11-20 17:39:51,122 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 76 transitions, 386 flow [2024-11-20 17:39:51,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.272727272727273) internal successors, (311), 11 states have internal predecessors, (311), 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 17:39:51,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:51,123 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:51,130 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 17:39:51,323 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,SelfDestructingSolverStorable14 [2024-11-20 17:39:51,323 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:51,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:51,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1747173511, now seen corresponding path program 1 times [2024-11-20 17:39:51,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:51,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659565194] [2024-11-20 17:39:51,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:51,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:51,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659565194] [2024-11-20 17:39:51,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659565194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:51,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024664141] [2024-11-20 17:39:51,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:51,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:51,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:51,690 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 17:39:51,690 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 17:39:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:51,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-20 17:39:51,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:51,802 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 6 treesize of output 5 [2024-11-20 17:39:51,805 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 17:39:51,851 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:51,851 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 11 treesize of output 11 [2024-11-20 17:39:51,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-20 17:39:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:52,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:52,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024664141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:52,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:52,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-11-20 17:39:52,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317698880] [2024-11-20 17:39:52,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:52,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 17:39:52,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:52,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 17:39:52,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-20 17:39:53,072 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-20 17:39:53,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 76 transitions, 386 flow. Second operand has 28 states, 28 states have (on average 24.142857142857142) internal successors, (676), 28 states have internal predecessors, (676), 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 17:39:53,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:53,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-20 17:39:53,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:53,887 INFO L124 PetriNetUnfolderBase]: 2710/5074 cut-off events. [2024-11-20 17:39:53,887 INFO L125 PetriNetUnfolderBase]: For 9798/10078 co-relation queries the response was YES. [2024-11-20 17:39:53,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15502 conditions, 5074 events. 2710/5074 cut-off events. For 9798/10078 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 35294 event pairs, 701 based on Foata normal form. 258/5253 useless extension candidates. Maximal degree in co-relation 15364. Up to 1247 conditions per place. [2024-11-20 17:39:53,914 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 111 selfloop transitions, 21 changer transitions 0/148 dead transitions. [2024-11-20 17:39:53,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 148 transitions, 942 flow [2024-11-20 17:39:53,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 17:39:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 17:39:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 499 transitions. [2024-11-20 17:39:53,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4892156862745098 [2024-11-20 17:39:53,916 INFO L175 Difference]: Start difference. First operand has 87 places, 76 transitions, 386 flow. Second operand 17 states and 499 transitions. [2024-11-20 17:39:53,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 148 transitions, 942 flow [2024-11-20 17:39:53,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 148 transitions, 918 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:53,926 INFO L231 Difference]: Finished difference. Result has 101 places, 76 transitions, 424 flow [2024-11-20 17:39:53,926 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=424, PETRI_PLACES=101, PETRI_TRANSITIONS=76} [2024-11-20 17:39:53,927 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 41 predicate places. [2024-11-20 17:39:53,927 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 76 transitions, 424 flow [2024-11-20 17:39:53,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 24.142857142857142) internal successors, (676), 28 states have internal predecessors, (676), 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 17:39:53,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:53,927 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:53,933 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 17:39:54,131 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,SelfDestructingSolverStorable15 [2024-11-20 17:39:54,132 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:54,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash -595519865, now seen corresponding path program 1 times [2024-11-20 17:39:54,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:54,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700991188] [2024-11-20 17:39:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:54,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:54,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:54,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700991188] [2024-11-20 17:39:54,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700991188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:54,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767701175] [2024-11-20 17:39:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:54,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:54,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:54,424 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 17:39:54,425 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 17:39:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:54,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 17:39:54,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:54,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:54,745 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 17:39:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:54,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767701175] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:54,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:54,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-20 17:39:54,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075226883] [2024-11-20 17:39:54,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:54,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 17:39:54,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:54,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 17:39:54,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-20 17:39:55,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-20 17:39:55,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 76 transitions, 424 flow. Second operand has 25 states, 25 states have (on average 30.48) internal successors, (762), 25 states have internal predecessors, (762), 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 17:39:55,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:55,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-20 17:39:55,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:56,150 INFO L124 PetriNetUnfolderBase]: 4091/7772 cut-off events. [2024-11-20 17:39:56,150 INFO L125 PetriNetUnfolderBase]: For 16811/17360 co-relation queries the response was YES. [2024-11-20 17:39:56,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23570 conditions, 7772 events. 4091/7772 cut-off events. For 16811/17360 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 59181 event pairs, 1805 based on Foata normal form. 408/8029 useless extension candidates. Maximal degree in co-relation 23416. Up to 3234 conditions per place. [2024-11-20 17:39:56,191 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 79 selfloop transitions, 19 changer transitions 0/114 dead transitions. [2024-11-20 17:39:56,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 114 transitions, 874 flow [2024-11-20 17:39:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:39:56,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:39:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 362 transitions. [2024-11-20 17:39:56,193 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-11-20 17:39:56,193 INFO L175 Difference]: Start difference. First operand has 101 places, 76 transitions, 424 flow. Second operand 10 states and 362 transitions. [2024-11-20 17:39:56,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 114 transitions, 874 flow [2024-11-20 17:39:56,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 842 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:56,204 INFO L231 Difference]: Finished difference. Result has 106 places, 78 transitions, 470 flow [2024-11-20 17:39:56,204 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=470, PETRI_PLACES=106, PETRI_TRANSITIONS=78} [2024-11-20 17:39:56,205 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 46 predicate places. [2024-11-20 17:39:56,205 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 78 transitions, 470 flow [2024-11-20 17:39:56,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.48) internal successors, (762), 25 states have internal predecessors, (762), 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 17:39:56,205 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:56,205 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:56,212 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 17:39:56,406 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 17:39:56,406 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:56,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:56,406 INFO L85 PathProgramCache]: Analyzing trace with hash 416478131, now seen corresponding path program 1 times [2024-11-20 17:39:56,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:56,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989082580] [2024-11-20 17:39:56,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:56,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:56,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:56,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989082580] [2024-11-20 17:39:56,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989082580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:56,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771094022] [2024-11-20 17:39:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:56,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:56,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:56,690 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 17:39:56,690 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 17:39:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:56,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-20 17:39:56,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:56,813 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 6 treesize of output 5 [2024-11-20 17:39:56,817 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 17:39:56,882 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:39:56,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-20 17:39:56,894 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:56,895 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 11 treesize of output 11 [2024-11-20 17:39:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:57,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:57,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771094022] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:57,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:57,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-11-20 17:39:57,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563105799] [2024-11-20 17:39:57,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:57,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 17:39:57,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:57,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 17:39:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-20 17:39:57,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-20 17:39:57,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 78 transitions, 470 flow. Second operand has 28 states, 28 states have (on average 23.464285714285715) internal successors, (657), 28 states have internal predecessors, (657), 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 17:39:57,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:57,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-20 17:39:57,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:59,669 INFO L124 PetriNetUnfolderBase]: 8182/14209 cut-off events. [2024-11-20 17:39:59,669 INFO L125 PetriNetUnfolderBase]: For 31251/32312 co-relation queries the response was YES. [2024-11-20 17:39:59,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45378 conditions, 14209 events. 8182/14209 cut-off events. For 31251/32312 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 106647 event pairs, 1615 based on Foata normal form. 633/14655 useless extension candidates. Maximal degree in co-relation 45207. Up to 2775 conditions per place. [2024-11-20 17:39:59,747 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 126 selfloop transitions, 22 changer transitions 0/162 dead transitions. [2024-11-20 17:39:59,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 162 transitions, 1256 flow [2024-11-20 17:39:59,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 17:39:59,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 17:39:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 478 transitions. [2024-11-20 17:39:59,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46862745098039216 [2024-11-20 17:39:59,749 INFO L175 Difference]: Start difference. First operand has 106 places, 78 transitions, 470 flow. Second operand 17 states and 478 transitions. [2024-11-20 17:39:59,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 162 transitions, 1256 flow [2024-11-20 17:39:59,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 162 transitions, 1225 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:59,777 INFO L231 Difference]: Finished difference. Result has 120 places, 80 transitions, 514 flow [2024-11-20 17:39:59,778 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=514, PETRI_PLACES=120, PETRI_TRANSITIONS=80} [2024-11-20 17:39:59,778 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 60 predicate places. [2024-11-20 17:39:59,778 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 80 transitions, 514 flow [2024-11-20 17:39:59,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 23.464285714285715) internal successors, (657), 28 states have internal predecessors, (657), 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 17:39:59,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:59,779 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:59,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-20 17:39:59,982 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 17:39:59,983 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:39:59,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:59,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1063910132, now seen corresponding path program 1 times [2024-11-20 17:39:59,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:59,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140491412] [2024-11-20 17:39:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:59,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-20 17:40:00,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:00,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140491412] [2024-11-20 17:40:00,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140491412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:00,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615239396] [2024-11-20 17:40:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:00,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:00,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:00,727 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 17:40:00,728 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 17:40:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:00,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-20 17:40:00,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:00,839 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 6 treesize of output 5 [2024-11-20 17:40:00,884 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-20 17:40:00,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-20 17:40:00,949 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-20 17:40:00,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2024-11-20 17:40:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:01,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:01,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615239396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:01,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:01,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 33 [2024-11-20 17:40:01,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799025063] [2024-11-20 17:40:01,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:01,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-20 17:40:01,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:01,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-20 17:40:01,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2024-11-20 17:40:02,642 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-20 17:40:02,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 80 transitions, 514 flow. Second operand has 35 states, 35 states have (on average 23.4) internal successors, (819), 35 states have internal predecessors, (819), 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 17:40:02,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:02,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-20 17:40:02,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:05,422 INFO L124 PetriNetUnfolderBase]: 11915/20202 cut-off events. [2024-11-20 17:40:05,422 INFO L125 PetriNetUnfolderBase]: For 59389/61297 co-relation queries the response was YES. [2024-11-20 17:40:05,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67966 conditions, 20202 events. 11915/20202 cut-off events. For 59389/61297 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 156056 event pairs, 2903 based on Foata normal form. 966/21065 useless extension candidates. Maximal degree in co-relation 67790. Up to 4618 conditions per place. [2024-11-20 17:40:05,580 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 120 selfloop transitions, 25 changer transitions 0/160 dead transitions. [2024-11-20 17:40:05,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 160 transitions, 1374 flow [2024-11-20 17:40:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 17:40:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 17:40:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 512 transitions. [2024-11-20 17:40:05,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44912280701754387 [2024-11-20 17:40:05,583 INFO L175 Difference]: Start difference. First operand has 120 places, 80 transitions, 514 flow. Second operand 19 states and 512 transitions. [2024-11-20 17:40:05,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 160 transitions, 1374 flow [2024-11-20 17:40:05,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 160 transitions, 1292 flow, removed 10 selfloop flow, removed 14 redundant places. [2024-11-20 17:40:05,647 INFO L231 Difference]: Finished difference. Result has 128 places, 82 transitions, 553 flow [2024-11-20 17:40:05,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=553, PETRI_PLACES=128, PETRI_TRANSITIONS=82} [2024-11-20 17:40:05,648 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 68 predicate places. [2024-11-20 17:40:05,648 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 82 transitions, 553 flow [2024-11-20 17:40:05,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 23.4) internal successors, (819), 35 states have internal predecessors, (819), 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 17:40:05,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:05,649 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:05,659 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 17:40:05,849 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 17:40:05,849 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:40:05,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:05,850 INFO L85 PathProgramCache]: Analyzing trace with hash -880449330, now seen corresponding path program 1 times [2024-11-20 17:40:05,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:05,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830595492] [2024-11-20 17:40:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:05,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:06,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830595492] [2024-11-20 17:40:06,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830595492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702236738] [2024-11-20 17:40:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:06,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:06,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:06,369 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 17:40:06,370 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 17:40:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:06,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 17:40:06,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:06,631 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:06,718 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 17:40:06,811 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:06,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702236738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:06,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:06,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-20 17:40:06,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616429945] [2024-11-20 17:40:06,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:06,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-20 17:40:06,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-20 17:40:06,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-20 17:40:07,507 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-20 17:40:07,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 82 transitions, 553 flow. Second operand has 32 states, 32 states have (on average 29.96875) internal successors, (959), 32 states have internal predecessors, (959), 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 17:40:07,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:07,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-20 17:40:07,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:09,922 INFO L124 PetriNetUnfolderBase]: 10637/20330 cut-off events. [2024-11-20 17:40:09,923 INFO L125 PetriNetUnfolderBase]: For 63671/65179 co-relation queries the response was YES. [2024-11-20 17:40:10,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70736 conditions, 20330 events. 10637/20330 cut-off events. For 63671/65179 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 176476 event pairs, 2584 based on Foata normal form. 957/20955 useless extension candidates. Maximal degree in co-relation 70553. Up to 4405 conditions per place. [2024-11-20 17:40:10,234 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 149 selfloop transitions, 22 changer transitions 0/189 dead transitions. [2024-11-20 17:40:10,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 189 transitions, 1623 flow [2024-11-20 17:40:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:40:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:40:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 496 transitions. [2024-11-20 17:40:10,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6358974358974359 [2024-11-20 17:40:10,236 INFO L175 Difference]: Start difference. First operand has 128 places, 82 transitions, 553 flow. Second operand 13 states and 496 transitions. [2024-11-20 17:40:10,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 189 transitions, 1623 flow [2024-11-20 17:40:10,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 189 transitions, 1535 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-11-20 17:40:10,350 INFO L231 Difference]: Finished difference. Result has 133 places, 84 transitions, 591 flow [2024-11-20 17:40:10,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=591, PETRI_PLACES=133, PETRI_TRANSITIONS=84} [2024-11-20 17:40:10,352 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 73 predicate places. [2024-11-20 17:40:10,352 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 84 transitions, 591 flow [2024-11-20 17:40:10,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 29.96875) internal successors, (959), 32 states have internal predecessors, (959), 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 17:40:10,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:10,353 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:10,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-20 17:40:10,553 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 17:40:10,554 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:40:10,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:10,558 INFO L85 PathProgramCache]: Analyzing trace with hash -834510873, now seen corresponding path program 1 times [2024-11-20 17:40:10,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:10,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137264921] [2024-11-20 17:40:10,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:10,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:10,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:10,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137264921] [2024-11-20 17:40:10,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137264921] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:10,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298462495] [2024-11-20 17:40:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:10,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:10,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:10,912 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 17:40:10,913 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 17:40:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:11,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 17:40:11,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:11,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:11,300 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 17:40:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:11,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298462495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:11,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:11,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-20 17:40:11,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577877714] [2024-11-20 17:40:11,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:11,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-20 17:40:11,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:11,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-20 17:40:11,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-20 17:40:12,130 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-20 17:40:12,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 84 transitions, 591 flow. Second operand has 32 states, 32 states have (on average 30.15625) internal successors, (965), 32 states have internal predecessors, (965), 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 17:40:12,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:12,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-20 17:40:12,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:15,067 INFO L124 PetriNetUnfolderBase]: 12845/24464 cut-off events. [2024-11-20 17:40:15,067 INFO L125 PetriNetUnfolderBase]: For 86423/88271 co-relation queries the response was YES. [2024-11-20 17:40:15,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88386 conditions, 24464 events. 12845/24464 cut-off events. For 86423/88271 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 215358 event pairs, 3452 based on Foata normal form. 1143/25330 useless extension candidates. Maximal degree in co-relation 88198. Up to 5988 conditions per place. [2024-11-20 17:40:15,271 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 151 selfloop transitions, 22 changer transitions 0/191 dead transitions. [2024-11-20 17:40:15,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 191 transitions, 1780 flow [2024-11-20 17:40:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:40:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:40:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 486 transitions. [2024-11-20 17:40:15,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-11-20 17:40:15,272 INFO L175 Difference]: Start difference. First operand has 133 places, 84 transitions, 591 flow. Second operand 13 states and 486 transitions. [2024-11-20 17:40:15,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 191 transitions, 1780 flow [2024-11-20 17:40:15,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 191 transitions, 1713 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-20 17:40:15,400 INFO L231 Difference]: Finished difference. Result has 139 places, 86 transitions, 630 flow [2024-11-20 17:40:15,400 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=630, PETRI_PLACES=139, PETRI_TRANSITIONS=86} [2024-11-20 17:40:15,400 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 79 predicate places. [2024-11-20 17:40:15,400 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 86 transitions, 630 flow [2024-11-20 17:40:15,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 30.15625) internal successors, (965), 32 states have internal predecessors, (965), 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 17:40:15,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:15,401 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:15,408 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 17:40:15,602 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 17:40:15,602 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:40:15,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:15,603 INFO L85 PathProgramCache]: Analyzing trace with hash 734782558, now seen corresponding path program 2 times [2024-11-20 17:40:15,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:15,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100866244] [2024-11-20 17:40:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:15,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 39 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-20 17:40:16,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:16,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100866244] [2024-11-20 17:40:16,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100866244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:16,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658718223] [2024-11-20 17:40:16,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:40:16,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:16,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:16,515 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 17:40:16,516 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 17:40:16,649 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:40:16,649 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:40:16,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-20 17:40:16,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:16,657 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 17:40:16,659 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 6 treesize of output 5 [2024-11-20 17:40:16,723 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:40:16,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-20 17:40:16,738 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-20 17:40:16,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-20 17:40:17,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:40:17,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:40:17,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-20 17:40:17,016 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-20 17:40:17,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-20 17:40:17,360 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:17,361 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:18,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658718223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:18,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:18,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2024-11-20 17:40:18,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649641528] [2024-11-20 17:40:18,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:18,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-20 17:40:18,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:18,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-20 17:40:18,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1406, Unknown=0, NotChecked=0, Total=1722 [2024-11-20 17:40:20,104 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-20 17:40:20,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 86 transitions, 630 flow. Second operand has 42 states, 42 states have (on average 23.142857142857142) internal successors, (972), 42 states have internal predecessors, (972), 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 17:40:20,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:20,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-20 17:40:20,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:26,561 INFO L124 PetriNetUnfolderBase]: 29429/47243 cut-off events. [2024-11-20 17:40:26,561 INFO L125 PetriNetUnfolderBase]: For 200081/203641 co-relation queries the response was YES. [2024-11-20 17:40:26,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184587 conditions, 47243 events. 29429/47243 cut-off events. For 200081/203641 co-relation queries the response was YES. Maximal size of possible extension queue 1155. Compared 377109 event pairs, 4941 based on Foata normal form. 522/47673 useless extension candidates. Maximal degree in co-relation 184395. Up to 8287 conditions per place. [2024-11-20 17:40:27,128 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 227 selfloop transitions, 20 changer transitions 0/259 dead transitions. [2024-11-20 17:40:27,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 259 transitions, 2421 flow [2024-11-20 17:40:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 17:40:27,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 17:40:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 471 transitions. [2024-11-20 17:40:27,130 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5233333333333333 [2024-11-20 17:40:27,130 INFO L175 Difference]: Start difference. First operand has 139 places, 86 transitions, 630 flow. Second operand 15 states and 471 transitions. [2024-11-20 17:40:27,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 259 transitions, 2421 flow [2024-11-20 17:40:27,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 259 transitions, 2348 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-20 17:40:27,505 INFO L231 Difference]: Finished difference. Result has 146 places, 88 transitions, 662 flow [2024-11-20 17:40:27,505 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=662, PETRI_PLACES=146, PETRI_TRANSITIONS=88} [2024-11-20 17:40:27,505 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 86 predicate places. [2024-11-20 17:40:27,505 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 88 transitions, 662 flow [2024-11-20 17:40:27,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 23.142857142857142) internal successors, (972), 42 states have internal predecessors, (972), 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 17:40:27,506 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:27,506 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:27,513 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 17:40:27,706 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 17:40:27,706 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:40:27,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:27,707 INFO L85 PathProgramCache]: Analyzing trace with hash -264484294, now seen corresponding path program 1 times [2024-11-20 17:40:27,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:27,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577655536] [2024-11-20 17:40:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:27,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-20 17:40:27,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:27,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577655536] [2024-11-20 17:40:27,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577655536] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:40:27,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:40:27,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:40:27,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817595243] [2024-11-20 17:40:27,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:40:27,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:40:27,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:27,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:40:27,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:40:27,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-20 17:40:27,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 88 transitions, 662 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 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 17:40:27,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:27,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-20 17:40:27,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:31,239 INFO L124 PetriNetUnfolderBase]: 14184/26752 cut-off events. [2024-11-20 17:40:31,239 INFO L125 PetriNetUnfolderBase]: For 113226/115815 co-relation queries the response was YES. [2024-11-20 17:40:31,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103112 conditions, 26752 events. 14184/26752 cut-off events. For 113226/115815 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 236696 event pairs, 10966 based on Foata normal form. 36/26224 useless extension candidates. Maximal degree in co-relation 102921. Up to 17841 conditions per place. [2024-11-20 17:40:31,472 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 86 selfloop transitions, 2 changer transitions 1/109 dead transitions. [2024-11-20 17:40:31,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 109 transitions, 1026 flow [2024-11-20 17:40:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:40:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:40:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-11-20 17:40:31,474 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7166666666666667 [2024-11-20 17:40:31,474 INFO L175 Difference]: Start difference. First operand has 146 places, 88 transitions, 662 flow. Second operand 3 states and 129 transitions. [2024-11-20 17:40:31,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 109 transitions, 1026 flow [2024-11-20 17:40:31,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 109 transitions, 987 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-20 17:40:31,843 INFO L231 Difference]: Finished difference. Result has 138 places, 88 transitions, 639 flow [2024-11-20 17:40:31,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=639, PETRI_PLACES=138, PETRI_TRANSITIONS=88} [2024-11-20 17:40:31,844 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 78 predicate places. [2024-11-20 17:40:31,844 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 88 transitions, 639 flow [2024-11-20 17:40:31,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 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 17:40:31,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:31,844 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:31,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-20 17:40:31,844 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:40:31,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1303423644, now seen corresponding path program 2 times [2024-11-20 17:40:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:31,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096831563] [2024-11-20 17:40:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:32,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096831563] [2024-11-20 17:40:32,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096831563] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:32,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253207772] [2024-11-20 17:40:32,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:40:32,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:32,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:32,353 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 17:40:32,354 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 17:40:32,475 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:40:32,475 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:40:32,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-20 17:40:32,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:32,483 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 17:40:32,485 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 6 treesize of output 5 [2024-11-20 17:40:32,548 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:40:32,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-20 17:40:32,565 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-20 17:40:32,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-20 17:40:32,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:40:32,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:40:32,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-20 17:40:32,708 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-20 17:40:32,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-20 17:40:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-20 17:40:32,920 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-20 17:40:34,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253207772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:34,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:34,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 21 [2024-11-20 17:40:34,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440055648] [2024-11-20 17:40:34,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:34,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 17:40:34,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:34,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 17:40:34,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-11-20 17:40:35,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-20 17:40:35,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 88 transitions, 639 flow. Second operand has 22 states, 22 states have (on average 24.818181818181817) internal successors, (546), 22 states have internal predecessors, (546), 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 17:40:35,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:35,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-20 17:40:35,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:40:40,749 INFO L124 PetriNetUnfolderBase]: 19578/32030 cut-off events. [2024-11-20 17:40:40,749 INFO L125 PetriNetUnfolderBase]: For 137140/139508 co-relation queries the response was YES. [2024-11-20 17:40:40,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127578 conditions, 32030 events. 19578/32030 cut-off events. For 137140/139508 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 249005 event pairs, 2570 based on Foata normal form. 732/32361 useless extension candidates. Maximal degree in co-relation 127397. Up to 4526 conditions per place. [2024-11-20 17:40:41,044 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 301 selfloop transitions, 29 changer transitions 0/345 dead transitions. [2024-11-20 17:40:41,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 345 transitions, 3358 flow [2024-11-20 17:40:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-20 17:40:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-20 17:40:41,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 850 transitions. [2024-11-20 17:40:41,047 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4885057471264368 [2024-11-20 17:40:41,047 INFO L175 Difference]: Start difference. First operand has 138 places, 88 transitions, 639 flow. Second operand 29 states and 850 transitions. [2024-11-20 17:40:41,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 345 transitions, 3358 flow [2024-11-20 17:40:41,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 345 transitions, 3298 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-20 17:40:41,298 INFO L231 Difference]: Finished difference. Result has 159 places, 89 transitions, 685 flow [2024-11-20 17:40:41,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=685, PETRI_PLACES=159, PETRI_TRANSITIONS=89} [2024-11-20 17:40:41,298 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 99 predicate places. [2024-11-20 17:40:41,298 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 89 transitions, 685 flow [2024-11-20 17:40:41,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 24.818181818181817) internal successors, (546), 22 states have internal predecessors, (546), 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 17:40:41,299 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:40:41,299 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:40:41,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-20 17:40:41,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:41,499 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:40:41,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:40:41,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1417275307, now seen corresponding path program 2 times [2024-11-20 17:40:41,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:40:41,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987960715] [2024-11-20 17:40:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:40:41,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:40:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:40:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:42,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:40:42,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987960715] [2024-11-20 17:40:42,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987960715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:40:42,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89226460] [2024-11-20 17:40:42,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:40:42,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:40:42,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:40:42,057 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 17:40:42,058 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 17:40:42,221 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:40:42,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:40:42,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-20 17:40:42,230 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:40:42,235 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 6 treesize of output 5 [2024-11-20 17:40:42,364 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:40:42,365 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 11 treesize of output 11 [2024-11-20 17:40:42,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:40:42,600 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:42,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:42,814 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 52 treesize of output 48 [2024-11-20 17:40:43,051 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:43,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89226460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:43,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:43,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 38 [2024-11-20 17:40:43,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699058646] [2024-11-20 17:40:43,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:43,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-20 17:40:43,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:43,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-20 17:40:43,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2024-11-20 17:40:44,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-20 17:40:44,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 89 transitions, 685 flow. Second operand has 39 states, 39 states have (on average 25.615384615384617) internal successors, (999), 39 states have internal predecessors, (999), 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 17:40:44,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:44,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-20 17:40:44,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand