./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-symm.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-symm.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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:39:20,972 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:39:21,043 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:39:21,047 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:39:21,048 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:39:21,078 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:39:21,079 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:39:21,080 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:39:21,080 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:39:21,081 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:39:21,081 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:39:21,081 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:39:21,082 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:39:21,082 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:39:21,083 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:39:21,083 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:39:21,083 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:39:21,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:39:21,084 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:39:21,085 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:39:21,085 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:39:21,089 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:39:21,090 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:39:21,090 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:39:21,090 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:39:21,090 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:39:21,090 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:39:21,091 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:39:21,091 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:39:21,091 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:39:21,092 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:39:21,092 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:39:21,092 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:39:21,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:39:21,092 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:39:21,093 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:39:21,093 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:39:21,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:39:21,096 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:39:21,096 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:39:21,096 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:39:21,097 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:39:21,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-11-20 17:39:21,360 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:39:21,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:39:21,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:39:21,395 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:39:21,395 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:39:21,396 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-20 17:39:22,868 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:39:23,072 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:39:23,073 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-20 17:39:23,082 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76dacaa4b/3ddd9254982b4b88ba36cdf5439200a9/FLAG1a73ad234 [2024-11-20 17:39:23,095 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76dacaa4b/3ddd9254982b4b88ba36cdf5439200a9 [2024-11-20 17:39:23,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:39:23,100 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:39:23,112 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:39:23,112 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:39:23,129 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:39:23,130 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,132 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ffd3580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23, skipping insertion in model container [2024-11-20 17:39:23,133 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,178 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:39:23,391 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 17:39:23,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:39:23,402 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:39:23,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:39:23,441 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:39:23,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23 WrapperNode [2024-11-20 17:39:23,441 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:39:23,442 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:39:23,442 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:39:23,442 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:39:23,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,455 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,479 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 193 [2024-11-20 17:39:23,482 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:39:23,482 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:39:23,482 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:39:23,482 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:39:23,491 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,495 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,513 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-20 17:39:23,514 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,514 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,528 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,535 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,537 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,538 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,543 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:39:23,546 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:39:23,546 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:39:23,546 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:39:23,547 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (1/1) ... [2024-11-20 17:39:23,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:39:23,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:23,587 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 17:39:23,594 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 17:39:23,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:39:23,638 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:39:23,638 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:39:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:39:23,639 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:39:23,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:39:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:39:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:39:23,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:39:23,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:39:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:39:23,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:39:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:39:23,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:39:23,643 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 17:39:23,778 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:39:23,780 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:39:24,200 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:39:24,200 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:39:24,517 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:39:24,517 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 17:39:24,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:39:24 BoogieIcfgContainer [2024-11-20 17:39:24,518 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:39:24,521 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:39:24,521 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:39:24,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:39:24,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:39:23" (1/3) ... [2024-11-20 17:39:24,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be9df14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:39:24, skipping insertion in model container [2024-11-20 17:39:24,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:39:23" (2/3) ... [2024-11-20 17:39:24,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be9df14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:39:24, skipping insertion in model container [2024-11-20 17:39:24,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:39:24" (3/3) ... [2024-11-20 17:39:24,528 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-11-20 17:39:24,544 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:39:24,545 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-20 17:39:24,545 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:39:24,606 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 17:39:24,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 98 flow [2024-11-20 17:39:24,669 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-11-20 17:39:24,669 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:39:24,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 40 events. 4/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 80 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-20 17:39:24,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 42 transitions, 98 flow [2024-11-20 17:39:24,676 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 39 transitions, 90 flow [2024-11-20 17:39:24,685 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:39:24,691 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;@7a87cab2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:39:24,692 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-20 17:39:24,694 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:39:24,695 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:39:24,695 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:39:24,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:24,696 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:39:24,696 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:24,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:24,701 INFO L85 PathProgramCache]: Analyzing trace with hash 664973, now seen corresponding path program 1 times [2024-11-20 17:39:24,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:24,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114058753] [2024-11-20 17:39:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:24,967 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 17:39:24,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:24,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114058753] [2024-11-20 17:39:24,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114058753] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:24,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:24,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:39:24,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384694394] [2024-11-20 17:39:24,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:24,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:39:24,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:25,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:39:25,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:39:25,045 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-20 17:39:25,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 17:39:25,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:25,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-20 17:39:25,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:25,160 INFO L124 PetriNetUnfolderBase]: 39/124 cut-off events. [2024-11-20 17:39:25,161 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-20 17:39:25,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 124 events. 39/124 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 488 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 168. Up to 68 conditions per place. [2024-11-20 17:39:25,164 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 18 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-11-20 17:39:25,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 122 flow [2024-11-20 17:39:25,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:39:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:39:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-20 17:39:25,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-20 17:39:25,177 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 90 flow. Second operand 3 states and 77 transitions. [2024-11-20 17:39:25,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 122 flow [2024-11-20 17:39:25,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 114 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:39:25,183 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-11-20 17:39:25,187 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-20 17:39:25,191 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2024-11-20 17:39:25,192 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-11-20 17:39:25,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 17:39:25,194 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:25,194 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:39:25,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:39:25,195 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:25,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:25,196 INFO L85 PathProgramCache]: Analyzing trace with hash 664974, now seen corresponding path program 1 times [2024-11-20 17:39:25,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:25,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479882614] [2024-11-20 17:39:25,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:25,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:25,461 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 17:39:25,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:25,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479882614] [2024-11-20 17:39:25,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479882614] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:25,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:25,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:39:25,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982312821] [2024-11-20 17:39:25,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:25,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:25,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:25,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:25,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:25,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-20 17:39:25,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 17:39:25,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:25,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-20 17:39:25,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:25,624 INFO L124 PetriNetUnfolderBase]: 41/130 cut-off events. [2024-11-20 17:39:25,624 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:39:25,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 130 events. 41/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 507 event pairs, 22 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 185. Up to 77 conditions per place. [2024-11-20 17:39:25,625 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 23 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2024-11-20 17:39:25,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 148 flow [2024-11-20 17:39:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:39:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:39:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-11-20 17:39:25,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-20 17:39:25,630 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 3 states and 84 transitions. [2024-11-20 17:39:25,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 148 flow [2024-11-20 17:39:25,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:25,633 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 114 flow [2024-11-20 17:39:25,633 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2024-11-20 17:39:25,634 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-11-20 17:39:25,634 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 114 flow [2024-11-20 17:39:25,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 17:39:25,635 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:25,635 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:39:25,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:39:25,635 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:25,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:25,636 INFO L85 PathProgramCache]: Analyzing trace with hash 639061118, now seen corresponding path program 1 times [2024-11-20 17:39:25,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:25,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623638662] [2024-11-20 17:39:25,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:25,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:25,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:25,862 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 17:39:25,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:25,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623638662] [2024-11-20 17:39:25,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623638662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:25,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401965556] [2024-11-20 17:39:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:25,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:25,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:25,868 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 17:39:25,869 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 17:39:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:25,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 17:39:25,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:26,005 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 17:39:26,063 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 17:39:26,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:26,141 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 17:39:26,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401965556] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:26,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:26,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-20 17:39:26,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007828850] [2024-11-20 17:39:26,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:26,153 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 17:39:26,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:26,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 17:39:26,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-20 17:39:26,323 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-20 17:39:26,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 114 flow. Second operand has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 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 17:39:26,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:26,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-20 17:39:26,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:26,571 INFO L124 PetriNetUnfolderBase]: 43/144 cut-off events. [2024-11-20 17:39:26,571 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-20 17:39:26,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 144 events. 43/144 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 522 event pairs, 22 based on Foata normal form. 4/118 useless extension candidates. Maximal degree in co-relation 217. Up to 78 conditions per place. [2024-11-20 17:39:26,573 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 28 selfloop transitions, 14 changer transitions 0/55 dead transitions. [2024-11-20 17:39:26,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 248 flow [2024-11-20 17:39:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-11-20 17:39:26,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-11-20 17:39:26,576 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 114 flow. Second operand 6 states and 160 transitions. [2024-11-20 17:39:26,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 248 flow [2024-11-20 17:39:26,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:26,579 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 198 flow [2024-11-20 17:39:26,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2024-11-20 17:39:26,580 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-11-20 17:39:26,580 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 198 flow [2024-11-20 17:39:26,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 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 17:39:26,580 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:26,581 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-20 17:39:26,589 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 17:39:26,781 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 17:39:26,782 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:26,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:26,782 INFO L85 PathProgramCache]: Analyzing trace with hash -425273010, now seen corresponding path program 2 times [2024-11-20 17:39:26,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:26,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260671926] [2024-11-20 17:39:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:26,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:27,142 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 17:39:27,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:27,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260671926] [2024-11-20 17:39:27,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260671926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:27,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527434762] [2024-11-20 17:39:27,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:39:27,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:27,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:27,145 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 17:39:27,147 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 17:39:27,209 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:39:27,209 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:39:27,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:39:27,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:27,220 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 17:39:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:27,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:39:27,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527434762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:27,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:27,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-20 17:39:27,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196562337] [2024-11-20 17:39:27,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:27,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:39:27,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:27,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:39:27,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:39:28,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-20 17:39:28,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 198 flow. Second operand has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 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 17:39:28,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:28,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-20 17:39:28,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:28,667 INFO L124 PetriNetUnfolderBase]: 39/140 cut-off events. [2024-11-20 17:39:28,667 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-20 17:39:28,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 140 events. 39/140 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 481 event pairs, 22 based on Foata normal form. 8/120 useless extension candidates. Maximal degree in co-relation 211. Up to 68 conditions per place. [2024-11-20 17:39:28,670 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 23 selfloop transitions, 15 changer transitions 0/51 dead transitions. [2024-11-20 17:39:28,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 246 flow [2024-11-20 17:39:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:39:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:39:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-11-20 17:39:28,673 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-11-20 17:39:28,673 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 198 flow. Second operand 8 states and 190 transitions. [2024-11-20 17:39:28,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 246 flow [2024-11-20 17:39:28,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 208 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:28,677 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 156 flow [2024-11-20 17:39:28,678 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-11-20 17:39:28,678 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-11-20 17:39:28,678 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 156 flow [2024-11-20 17:39:28,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 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 17:39:28,679 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:28,679 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:28,689 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 17:39:28,883 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 17:39:28,884 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:28,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1693709676, now seen corresponding path program 1 times [2024-11-20 17:39:28,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:28,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298655886] [2024-11-20 17:39:28,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:28,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-20 17:39:29,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:29,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298655886] [2024-11-20 17:39:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298655886] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:29,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:29,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:39:29,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102555491] [2024-11-20 17:39:29,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:29,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:39:29,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:29,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:39:29,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:39:29,188 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-11-20 17:39:29,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 17:39:29,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:29,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-11-20 17:39:29,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:29,261 INFO L124 PetriNetUnfolderBase]: 50/159 cut-off events. [2024-11-20 17:39:29,261 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-20 17:39:29,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 159 events. 50/159 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 570 event pairs, 31 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 224. Up to 86 conditions per place. [2024-11-20 17:39:29,264 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 28 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2024-11-20 17:39:29,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 41 transitions, 214 flow [2024-11-20 17:39:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:39:29,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:39:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-11-20 17:39:29,266 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-20 17:39:29,266 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 156 flow. Second operand 5 states and 98 transitions. [2024-11-20 17:39:29,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 41 transitions, 214 flow [2024-11-20 17:39:29,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 186 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:29,267 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 130 flow [2024-11-20 17:39:29,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2024-11-20 17:39:29,270 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2024-11-20 17:39:29,271 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 130 flow [2024-11-20 17:39:29,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 17:39:29,271 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:29,271 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:29,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:39:29,272 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:29,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:29,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1693709675, now seen corresponding path program 1 times [2024-11-20 17:39:29,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:29,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410395419] [2024-11-20 17:39:29,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:29,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-20 17:39:29,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:29,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410395419] [2024-11-20 17:39:29,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410395419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:29,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304190636] [2024-11-20 17:39:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:29,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:29,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:29,671 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 17:39:29,673 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 17:39:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:29,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-20 17:39:29,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:29,785 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 17:39:29,790 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 17:39:29,894 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:39:29,894 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 17:39:29,911 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:29,911 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 17:39:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:30,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:30,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304190636] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:30,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:39:30,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 21 [2024-11-20 17:39:30,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226300747] [2024-11-20 17:39:30,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:30,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:39:30,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:30,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:39:30,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2024-11-20 17:39:30,901 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-20 17:39:30,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 130 flow. Second operand has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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 17:39:30,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:30,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-20 17:39:30,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:31,052 INFO L124 PetriNetUnfolderBase]: 86/233 cut-off events. [2024-11-20 17:39:31,053 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:39:31,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 233 events. 86/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 919 event pairs, 31 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 366. Up to 78 conditions per place. [2024-11-20 17:39:31,054 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-11-20 17:39:31,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 241 flow [2024-11-20 17:39:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:31,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-11-20 17:39:31,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-11-20 17:39:31,056 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 130 flow. Second operand 6 states and 142 transitions. [2024-11-20 17:39:31,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 241 flow [2024-11-20 17:39:31,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:39:31,058 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 150 flow [2024-11-20 17:39:31,058 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-11-20 17:39:31,059 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-11-20 17:39:31,059 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 150 flow [2024-11-20 17:39:31,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 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 17:39:31,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:31,060 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:31,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:39:31,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:31,261 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:31,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:31,261 INFO L85 PathProgramCache]: Analyzing trace with hash -965391780, now seen corresponding path program 1 times [2024-11-20 17:39:31,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:31,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861709001] [2024-11-20 17:39:31,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:31,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-20 17:39:31,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:31,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861709001] [2024-11-20 17:39:31,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861709001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:31,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:31,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:39:31,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258778305] [2024-11-20 17:39:31,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:31,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:31,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:31,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:31,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:31,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-11-20 17:39:31,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 17:39:31,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:31,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-11-20 17:39:31,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:31,451 INFO L124 PetriNetUnfolderBase]: 73/200 cut-off events. [2024-11-20 17:39:31,451 INFO L125 PetriNetUnfolderBase]: For 67/72 co-relation queries the response was YES. [2024-11-20 17:39:31,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 200 events. 73/200 cut-off events. For 67/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 730 event pairs, 57 based on Foata normal form. 7/204 useless extension candidates. Maximal degree in co-relation 360. Up to 132 conditions per place. [2024-11-20 17:39:31,452 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 29 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-20 17:39:31,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 208 flow [2024-11-20 17:39:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:39:31,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:39:31,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-20 17:39:31,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-11-20 17:39:31,454 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 150 flow. Second operand 4 states and 83 transitions. [2024-11-20 17:39:31,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 208 flow [2024-11-20 17:39:31,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 200 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:39:31,456 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 142 flow [2024-11-20 17:39:31,456 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-20 17:39:31,456 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-11-20 17:39:31,457 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 142 flow [2024-11-20 17:39:31,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 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 17:39:31,457 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:31,457 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:31,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 17:39:31,457 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:31,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:31,458 INFO L85 PathProgramCache]: Analyzing trace with hash -965391779, now seen corresponding path program 1 times [2024-11-20 17:39:31,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:31,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373214427] [2024-11-20 17:39:31,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:31,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 17:39:31,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:31,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373214427] [2024-11-20 17:39:31,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373214427] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:31,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601987450] [2024-11-20 17:39:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:31,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:31,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:31,726 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 17:39:31,728 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 17:39:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:31,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 17:39:31,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:31,982 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:32,055 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 17:39:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:32,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601987450] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:32,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:32,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-11-20 17:39:32,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443843825] [2024-11-20 17:39:32,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:32,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 17:39:32,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:32,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 17:39:32,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-11-20 17:39:32,845 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-20 17:39:32,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 142 flow. Second operand has 21 states, 21 states have (on average 20.904761904761905) internal successors, (439), 21 states have internal predecessors, (439), 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 17:39:32,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:32,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-20 17:39:32,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:33,191 INFO L124 PetriNetUnfolderBase]: 100/275 cut-off events. [2024-11-20 17:39:33,191 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-20 17:39:33,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 275 events. 100/275 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1069 event pairs, 31 based on Foata normal form. 16/274 useless extension candidates. Maximal degree in co-relation 520. Up to 86 conditions per place. [2024-11-20 17:39:33,193 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 14 changer transitions 0/70 dead transitions. [2024-11-20 17:39:33,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 352 flow [2024-11-20 17:39:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:39:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:39:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-11-20 17:39:33,195 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5976190476190476 [2024-11-20 17:39:33,195 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 142 flow. Second operand 10 states and 251 transitions. [2024-11-20 17:39:33,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 352 flow [2024-11-20 17:39:33,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 349 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:33,197 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 187 flow [2024-11-20 17:39:33,197 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=187, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-11-20 17:39:33,198 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-11-20 17:39:33,198 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 187 flow [2024-11-20 17:39:33,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.904761904761905) internal successors, (439), 21 states have internal predecessors, (439), 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 17:39:33,199 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:33,199 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:33,209 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 17:39:33,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:33,403 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:33,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:33,403 INFO L85 PathProgramCache]: Analyzing trace with hash 114216719, now seen corresponding path program 1 times [2024-11-20 17:39:33,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:33,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373159256] [2024-11-20 17:39:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:33,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 17:39:33,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:33,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373159256] [2024-11-20 17:39:33,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373159256] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:33,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969545987] [2024-11-20 17:39:33,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:33,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:33,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:33,693 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 17:39:33,695 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 17:39:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:33,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 17:39:33,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:33,945 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:34,020 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 17:39:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:34,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969545987] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:34,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:34,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-11-20 17:39:34,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360199685] [2024-11-20 17:39:34,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:34,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 17:39:34,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:34,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 17:39:34,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-11-20 17:39:34,475 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-20 17:39:34,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 187 flow. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 17:39:34,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:34,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-20 17:39:34,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:34,841 INFO L124 PetriNetUnfolderBase]: 257/591 cut-off events. [2024-11-20 17:39:34,841 INFO L125 PetriNetUnfolderBase]: For 504/521 co-relation queries the response was YES. [2024-11-20 17:39:34,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1431 conditions, 591 events. 257/591 cut-off events. For 504/521 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2876 event pairs, 84 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 1331. Up to 183 conditions per place. [2024-11-20 17:39:34,845 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2024-11-20 17:39:34,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 447 flow [2024-11-20 17:39:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:39:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:39:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-11-20 17:39:34,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-11-20 17:39:34,847 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 187 flow. Second operand 10 states and 239 transitions. [2024-11-20 17:39:34,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 447 flow [2024-11-20 17:39:34,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 426 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:34,850 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 215 flow [2024-11-20 17:39:34,850 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=215, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-20 17:39:34,851 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-11-20 17:39:34,851 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 215 flow [2024-11-20 17:39:34,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 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 17:39:34,852 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:34,852 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:34,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:35,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:35,053 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:35,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:35,053 INFO L85 PathProgramCache]: Analyzing trace with hash -754248404, now seen corresponding path program 1 times [2024-11-20 17:39:35,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:35,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214137436] [2024-11-20 17:39:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:35,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-20 17:39:35,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:35,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214137436] [2024-11-20 17:39:35,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214137436] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:35,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835190244] [2024-11-20 17:39:35,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:35,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:35,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:35,383 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 17:39:35,384 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 17:39:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:35,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-20 17:39:35,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:35,497 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 17:39:35,557 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-20 17:39:35,557 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 17:39:35,835 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:35,835 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:36,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835190244] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:36,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:39:36,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 22 [2024-11-20 17:39:36,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615624018] [2024-11-20 17:39:36,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:36,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:39:36,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:36,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:39:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2024-11-20 17:39:36,287 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-20 17:39:36,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 215 flow. Second operand has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:36,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:36,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-20 17:39:36,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:36,466 INFO L124 PetriNetUnfolderBase]: 206/514 cut-off events. [2024-11-20 17:39:36,467 INFO L125 PetriNetUnfolderBase]: For 547/560 co-relation queries the response was YES. [2024-11-20 17:39:36,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1396 conditions, 514 events. 206/514 cut-off events. For 547/560 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2498 event pairs, 128 based on Foata normal form. 17/519 useless extension candidates. Maximal degree in co-relation 1292. Up to 271 conditions per place. [2024-11-20 17:39:36,471 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 39 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-11-20 17:39:36,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 349 flow [2024-11-20 17:39:36,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:39:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:39:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-11-20 17:39:36,472 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-11-20 17:39:36,472 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 215 flow. Second operand 6 states and 145 transitions. [2024-11-20 17:39:36,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 349 flow [2024-11-20 17:39:36,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 328 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:39:36,475 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 208 flow [2024-11-20 17:39:36,475 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-20 17:39:36,478 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-11-20 17:39:36,478 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 208 flow [2024-11-20 17:39:36,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:39:36,478 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:36,478 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:36,488 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 17:39:36,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:36,679 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:36,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:36,679 INFO L85 PathProgramCache]: Analyzing trace with hash -28541918, now seen corresponding path program 1 times [2024-11-20 17:39:36,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:36,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770250360] [2024-11-20 17:39:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:36,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:37,088 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-20 17:39:37,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:37,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770250360] [2024-11-20 17:39:37,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770250360] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:37,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634421949] [2024-11-20 17:39:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:37,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:37,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:37,092 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 17:39:37,093 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 17:39:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:37,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-20 17:39:37,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:37,293 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 17:39:37,363 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-20 17:39:37,363 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 17:39:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:37,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:38,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634421949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:38,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:38,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2024-11-20 17:39:38,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169317186] [2024-11-20 17:39:38,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:38,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-20 17:39:38,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:38,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-20 17:39:38,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2024-11-20 17:39:38,692 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-20 17:39:38,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 208 flow. Second operand has 26 states, 26 states have (on average 16.115384615384617) internal successors, (419), 26 states have internal predecessors, (419), 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 17:39:38,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:38,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-20 17:39:38,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:39,595 INFO L124 PetriNetUnfolderBase]: 376/879 cut-off events. [2024-11-20 17:39:39,605 INFO L125 PetriNetUnfolderBase]: For 1183/1208 co-relation queries the response was YES. [2024-11-20 17:39:39,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2461 conditions, 879 events. 376/879 cut-off events. For 1183/1208 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4732 event pairs, 75 based on Foata normal form. 48/917 useless extension candidates. Maximal degree in co-relation 2345. Up to 153 conditions per place. [2024-11-20 17:39:39,617 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 76 selfloop transitions, 21 changer transitions 0/105 dead transitions. [2024-11-20 17:39:39,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 105 transitions, 655 flow [2024-11-20 17:39:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 17:39:39,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 17:39:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 375 transitions. [2024-11-20 17:39:39,630 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-20 17:39:39,630 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 208 flow. Second operand 20 states and 375 transitions. [2024-11-20 17:39:39,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 105 transitions, 655 flow [2024-11-20 17:39:39,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 627 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:39:39,639 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 297 flow [2024-11-20 17:39:39,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=297, PETRI_PLACES=76, PETRI_TRANSITIONS=50} [2024-11-20 17:39:39,640 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-11-20 17:39:39,640 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 297 flow [2024-11-20 17:39:39,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.115384615384617) internal successors, (419), 26 states have internal predecessors, (419), 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 17:39:39,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:39,640 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:39,649 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 17:39:39,844 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 17:39:39,844 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:39,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:39,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1455373354, now seen corresponding path program 1 times [2024-11-20 17:39:39,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:39,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742612878] [2024-11-20 17:39:39,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:39,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-20 17:39:40,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:40,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742612878] [2024-11-20 17:39:40,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742612878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:40,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000605056] [2024-11-20 17:39:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:40,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:40,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:40,199 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 17:39:40,200 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 17:39:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:40,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 17:39:40,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:40,304 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 17:39:40,307 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 17:39:40,405 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:39:40,406 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 17:39:40,416 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:39:40,416 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 17:39:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:40,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:41,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000605056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:41,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:41,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2024-11-20 17:39:41,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683240103] [2024-11-20 17:39:41,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:41,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-20 17:39:41,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:41,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-20 17:39:41,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-11-20 17:39:41,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-11-20 17:39:41,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 50 transitions, 297 flow. Second operand has 26 states, 26 states have (on average 19.23076923076923) internal successors, (500), 26 states have internal predecessors, (500), 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 17:39:41,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:41,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-11-20 17:39:41,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:42,710 INFO L124 PetriNetUnfolderBase]: 458/1266 cut-off events. [2024-11-20 17:39:42,710 INFO L125 PetriNetUnfolderBase]: For 2146/2188 co-relation queries the response was YES. [2024-11-20 17:39:42,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 1266 events. 458/1266 cut-off events. For 2146/2188 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8053 event pairs, 138 based on Foata normal form. 81/1329 useless extension candidates. Maximal degree in co-relation 3532. Up to 306 conditions per place. [2024-11-20 17:39:42,718 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 77 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-11-20 17:39:42,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 101 transitions, 795 flow [2024-11-20 17:39:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:39:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:39:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 289 transitions. [2024-11-20 17:39:42,720 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5293040293040293 [2024-11-20 17:39:42,720 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 297 flow. Second operand 13 states and 289 transitions. [2024-11-20 17:39:42,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 101 transitions, 795 flow [2024-11-20 17:39:42,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 101 transitions, 726 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-20 17:39:42,724 INFO L231 Difference]: Finished difference. Result has 83 places, 53 transitions, 326 flow [2024-11-20 17:39:42,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=326, PETRI_PLACES=83, PETRI_TRANSITIONS=53} [2024-11-20 17:39:42,726 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-11-20 17:39:42,726 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 53 transitions, 326 flow [2024-11-20 17:39:42,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 19.23076923076923) internal successors, (500), 26 states have internal predecessors, (500), 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 17:39:42,727 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:42,727 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:42,737 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 17:39:42,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-20 17:39:42,931 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:42,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:42,932 INFO L85 PathProgramCache]: Analyzing trace with hash -827986563, now seen corresponding path program 1 times [2024-11-20 17:39:42,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:42,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417706501] [2024-11-20 17:39:42,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:42,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 17:39:43,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:43,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417706501] [2024-11-20 17:39:43,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417706501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:43,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624960552] [2024-11-20 17:39:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:43,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:43,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:43,264 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 17:39:43,267 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 17:39:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:43,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 17:39:43,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:43,581 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:43,734 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 17:39:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:43,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624960552] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:43,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:43,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2024-11-20 17:39:43,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139845728] [2024-11-20 17:39:43,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:43,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 17:39:43,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:43,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 17:39:43,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-20 17:39:44,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-20 17:39:44,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 53 transitions, 326 flow. Second operand has 28 states, 28 states have (on average 20.678571428571427) internal successors, (579), 28 states have internal predecessors, (579), 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 17:39:44,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:44,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-20 17:39:44,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:45,617 INFO L124 PetriNetUnfolderBase]: 560/1433 cut-off events. [2024-11-20 17:39:45,618 INFO L125 PetriNetUnfolderBase]: For 3156/3178 co-relation queries the response was YES. [2024-11-20 17:39:45,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4499 conditions, 1433 events. 560/1433 cut-off events. For 3156/3178 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8959 event pairs, 119 based on Foata normal form. 72/1479 useless extension candidates. Maximal degree in co-relation 4376. Up to 270 conditions per place. [2024-11-20 17:39:45,626 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 104 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2024-11-20 17:39:45,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 133 transitions, 995 flow [2024-11-20 17:39:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:39:45,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:39:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 342 transitions. [2024-11-20 17:39:45,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-11-20 17:39:45,628 INFO L175 Difference]: Start difference. First operand has 83 places, 53 transitions, 326 flow. Second operand 13 states and 342 transitions. [2024-11-20 17:39:45,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 133 transitions, 995 flow [2024-11-20 17:39:45,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 968 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-20 17:39:45,635 INFO L231 Difference]: Finished difference. Result has 90 places, 55 transitions, 377 flow [2024-11-20 17:39:45,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=377, PETRI_PLACES=90, PETRI_TRANSITIONS=55} [2024-11-20 17:39:45,636 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-11-20 17:39:45,636 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 55 transitions, 377 flow [2024-11-20 17:39:45,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 20.678571428571427) internal successors, (579), 28 states have internal predecessors, (579), 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 17:39:45,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:45,636 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:45,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:45,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-20 17:39:45,837 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:45,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:45,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1181979473, now seen corresponding path program 1 times [2024-11-20 17:39:45,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:45,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114078197] [2024-11-20 17:39:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:45,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:45,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:45,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114078197] [2024-11-20 17:39:45,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114078197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:45,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:45,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:39:45,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945159476] [2024-11-20 17:39:45,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:45,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:45,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:45,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:45,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:46,009 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-20 17:39:46,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 55 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 17:39:46,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:46,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-20 17:39:46,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:46,279 INFO L124 PetriNetUnfolderBase]: 523/1424 cut-off events. [2024-11-20 17:39:46,279 INFO L125 PetriNetUnfolderBase]: For 3510/3548 co-relation queries the response was YES. [2024-11-20 17:39:46,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4612 conditions, 1424 events. 523/1424 cut-off events. For 3510/3548 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9172 event pairs, 380 based on Foata normal form. 2/1390 useless extension candidates. Maximal degree in co-relation 4482. Up to 825 conditions per place. [2024-11-20 17:39:46,289 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 62 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2024-11-20 17:39:46,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 77 transitions, 687 flow [2024-11-20 17:39:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:39:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:39:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-20 17:39:46,291 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-20 17:39:46,291 INFO L175 Difference]: Start difference. First operand has 90 places, 55 transitions, 377 flow. Second operand 4 states and 114 transitions. [2024-11-20 17:39:46,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 77 transitions, 687 flow [2024-11-20 17:39:46,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 77 transitions, 647 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-20 17:39:46,296 INFO L231 Difference]: Finished difference. Result has 86 places, 56 transitions, 364 flow [2024-11-20 17:39:46,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=86, PETRI_TRANSITIONS=56} [2024-11-20 17:39:46,299 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-11-20 17:39:46,299 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 56 transitions, 364 flow [2024-11-20 17:39:46,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 17:39:46,299 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:46,299 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:46,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-20 17:39:46,299 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:46,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash 595953299, now seen corresponding path program 2 times [2024-11-20 17:39:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:46,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308297912] [2024-11-20 17:39:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:46,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:46,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:46,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308297912] [2024-11-20 17:39:46,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308297912] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:46,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:46,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:39:46,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874294827] [2024-11-20 17:39:46,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:46,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:46,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:46,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:46,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:46,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-20 17:39:46,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 56 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 17:39:46,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:46,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-20 17:39:46,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:46,675 INFO L124 PetriNetUnfolderBase]: 520/1169 cut-off events. [2024-11-20 17:39:46,675 INFO L125 PetriNetUnfolderBase]: For 3590/3616 co-relation queries the response was YES. [2024-11-20 17:39:46,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4230 conditions, 1169 events. 520/1169 cut-off events. For 3590/3616 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6741 event pairs, 388 based on Foata normal form. 3/1070 useless extension candidates. Maximal degree in co-relation 4109. Up to 841 conditions per place. [2024-11-20 17:39:46,684 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 64 selfloop transitions, 3 changer transitions 2/81 dead transitions. [2024-11-20 17:39:46,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 655 flow [2024-11-20 17:39:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:39:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:39:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-20 17:39:46,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-20 17:39:46,686 INFO L175 Difference]: Start difference. First operand has 86 places, 56 transitions, 364 flow. Second operand 4 states and 117 transitions. [2024-11-20 17:39:46,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 655 flow [2024-11-20 17:39:46,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 645 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:46,692 INFO L231 Difference]: Finished difference. Result has 89 places, 57 transitions, 376 flow [2024-11-20 17:39:46,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=376, PETRI_PLACES=89, PETRI_TRANSITIONS=57} [2024-11-20 17:39:46,693 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-11-20 17:39:46,694 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 57 transitions, 376 flow [2024-11-20 17:39:46,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 17:39:46,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:46,695 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:46,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 17:39:46,695 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:46,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:46,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1043574799, now seen corresponding path program 3 times [2024-11-20 17:39:46,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:46,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279717022] [2024-11-20 17:39:46,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:46,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:46,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:46,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:46,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279717022] [2024-11-20 17:39:46,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279717022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:46,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:46,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:39:46,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786913873] [2024-11-20 17:39:46,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:46,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:46,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:46,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:46,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:46,887 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-20 17:39:46,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 57 transitions, 376 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 17:39:46,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:46,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-20 17:39:46,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:47,206 INFO L124 PetriNetUnfolderBase]: 787/1820 cut-off events. [2024-11-20 17:39:47,206 INFO L125 PetriNetUnfolderBase]: For 5707/5765 co-relation queries the response was YES. [2024-11-20 17:39:47,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6588 conditions, 1820 events. 787/1820 cut-off events. For 5707/5765 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11371 event pairs, 552 based on Foata normal form. 30/1838 useless extension candidates. Maximal degree in co-relation 6465. Up to 1133 conditions per place. [2024-11-20 17:39:47,222 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 68 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2024-11-20 17:39:47,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 83 transitions, 733 flow [2024-11-20 17:39:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:39:47,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:39:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-20 17:39:47,223 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-20 17:39:47,223 INFO L175 Difference]: Start difference. First operand has 89 places, 57 transitions, 376 flow. Second operand 4 states and 114 transitions. [2024-11-20 17:39:47,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 83 transitions, 733 flow [2024-11-20 17:39:47,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 83 transitions, 721 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:39:47,230 INFO L231 Difference]: Finished difference. Result has 92 places, 59 transitions, 407 flow [2024-11-20 17:39:47,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=407, PETRI_PLACES=92, PETRI_TRANSITIONS=59} [2024-11-20 17:39:47,231 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-11-20 17:39:47,231 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 59 transitions, 407 flow [2024-11-20 17:39:47,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 17:39:47,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:47,232 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:47,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-20 17:39:47,232 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:47,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:47,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2028777029, now seen corresponding path program 4 times [2024-11-20 17:39:47,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:47,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675353959] [2024-11-20 17:39:47,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:47,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:47,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:47,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675353959] [2024-11-20 17:39:47,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675353959] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:47,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:47,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:39:47,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154303634] [2024-11-20 17:39:47,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:47,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:47,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:47,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:47,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-20 17:39:47,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 59 transitions, 407 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 17:39:47,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:47,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-20 17:39:47,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:47,659 INFO L124 PetriNetUnfolderBase]: 544/1517 cut-off events. [2024-11-20 17:39:47,659 INFO L125 PetriNetUnfolderBase]: For 5707/5732 co-relation queries the response was YES. [2024-11-20 17:39:47,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5798 conditions, 1517 events. 544/1517 cut-off events. For 5707/5732 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10202 event pairs, 18 based on Foata normal form. 30/1533 useless extension candidates. Maximal degree in co-relation 5673. Up to 919 conditions per place. [2024-11-20 17:39:47,672 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 60 selfloop transitions, 6 changer transitions 1/80 dead transitions. [2024-11-20 17:39:47,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 80 transitions, 714 flow [2024-11-20 17:39:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:39:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:39:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-20 17:39:47,674 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-20 17:39:47,674 INFO L175 Difference]: Start difference. First operand has 92 places, 59 transitions, 407 flow. Second operand 4 states and 112 transitions. [2024-11-20 17:39:47,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 80 transitions, 714 flow [2024-11-20 17:39:47,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 80 transitions, 707 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 17:39:47,684 INFO L231 Difference]: Finished difference. Result has 96 places, 60 transitions, 444 flow [2024-11-20 17:39:47,684 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=444, PETRI_PLACES=96, PETRI_TRANSITIONS=60} [2024-11-20 17:39:47,684 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-11-20 17:39:47,685 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 60 transitions, 444 flow [2024-11-20 17:39:47,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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 17:39:47,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:47,685 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:47,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 17:39:47,685 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:47,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:47,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1545523249, now seen corresponding path program 1 times [2024-11-20 17:39:47,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:47,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215958679] [2024-11-20 17:39:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:47,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-20 17:39:48,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:48,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215958679] [2024-11-20 17:39:48,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215958679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:48,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199338736] [2024-11-20 17:39:48,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:48,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:48,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:48,020 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 17:39:48,022 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 17:39:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:48,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 17:39:48,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:48,375 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:48,518 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 17:39:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:48,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199338736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:48,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:48,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2024-11-20 17:39:48,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543264483] [2024-11-20 17:39:48,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:48,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 17:39:48,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:48,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 17:39:48,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-20 17:39:49,661 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-20 17:39:49,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 60 transitions, 444 flow. Second operand has 28 states, 28 states have (on average 20.107142857142858) internal successors, (563), 28 states have internal predecessors, (563), 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 17:39:49,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:49,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-20 17:39:49,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:50,608 INFO L124 PetriNetUnfolderBase]: 947/2069 cut-off events. [2024-11-20 17:39:50,608 INFO L125 PetriNetUnfolderBase]: For 8668/8726 co-relation queries the response was YES. [2024-11-20 17:39:50,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8123 conditions, 2069 events. 947/2069 cut-off events. For 8668/8726 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 12502 event pairs, 170 based on Foata normal form. 96/2125 useless extension candidates. Maximal degree in co-relation 7995. Up to 344 conditions per place. [2024-11-20 17:39:50,633 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 108 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2024-11-20 17:39:50,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 139 transitions, 1297 flow [2024-11-20 17:39:50,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:39:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:39:50,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 321 transitions. [2024-11-20 17:39:50,635 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5879120879120879 [2024-11-20 17:39:50,635 INFO L175 Difference]: Start difference. First operand has 96 places, 60 transitions, 444 flow. Second operand 13 states and 321 transitions. [2024-11-20 17:39:50,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 139 transitions, 1297 flow [2024-11-20 17:39:50,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 1278 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-20 17:39:50,648 INFO L231 Difference]: Finished difference. Result has 107 places, 61 transitions, 498 flow [2024-11-20 17:39:50,649 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=498, PETRI_PLACES=107, PETRI_TRANSITIONS=61} [2024-11-20 17:39:50,649 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-11-20 17:39:50,649 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 61 transitions, 498 flow [2024-11-20 17:39:50,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 20.107142857142858) internal successors, (563), 28 states have internal predecessors, (563), 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 17:39:50,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:50,650 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:50,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-20 17:39:50,850 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,SelfDestructingSolverStorable17 [2024-11-20 17:39:50,850 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:50,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:50,851 INFO L85 PathProgramCache]: Analyzing trace with hash 969379333, now seen corresponding path program 1 times [2024-11-20 17:39:50,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:50,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229981315] [2024-11-20 17:39:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:50,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:51,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:51,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229981315] [2024-11-20 17:39:51,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229981315] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:51,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:51,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:39:51,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378641238] [2024-11-20 17:39:51,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:51,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:51,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:51,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:51,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:51,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-20 17:39:51,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 61 transitions, 498 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 17:39:51,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:51,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-20 17:39:51,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:51,323 INFO L124 PetriNetUnfolderBase]: 908/2209 cut-off events. [2024-11-20 17:39:51,323 INFO L125 PetriNetUnfolderBase]: For 10585/10640 co-relation queries the response was YES. [2024-11-20 17:39:51,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8906 conditions, 2209 events. 908/2209 cut-off events. For 10585/10640 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 14465 event pairs, 611 based on Foata normal form. 22/2215 useless extension candidates. Maximal degree in co-relation 8765. Up to 1328 conditions per place. [2024-11-20 17:39:51,340 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 69 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2024-11-20 17:39:51,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 87 transitions, 866 flow [2024-11-20 17:39:51,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:39:51,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:39:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-20 17:39:51,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-20 17:39:51,342 INFO L175 Difference]: Start difference. First operand has 107 places, 61 transitions, 498 flow. Second operand 4 states and 117 transitions. [2024-11-20 17:39:51,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 87 transitions, 866 flow [2024-11-20 17:39:51,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 87 transitions, 798 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-20 17:39:51,357 INFO L231 Difference]: Finished difference. Result has 101 places, 63 transitions, 498 flow [2024-11-20 17:39:51,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=498, PETRI_PLACES=101, PETRI_TRANSITIONS=63} [2024-11-20 17:39:51,358 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-11-20 17:39:51,358 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 63 transitions, 498 flow [2024-11-20 17:39:51,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 17:39:51,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:51,359 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:51,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-20 17:39:51,359 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:51,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:51,359 INFO L85 PathProgramCache]: Analyzing trace with hash 747439645, now seen corresponding path program 2 times [2024-11-20 17:39:51,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:51,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688742850] [2024-11-20 17:39:51,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:51,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-20 17:39:51,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688742850] [2024-11-20 17:39:51,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688742850] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:39:51,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:39:51,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:39:51,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380045738] [2024-11-20 17:39:51,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:39:51,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:39:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:51,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:39:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:39:51,536 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-20 17:39:51,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 63 transitions, 498 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 17:39:51,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:51,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-20 17:39:51,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:51,786 INFO L124 PetriNetUnfolderBase]: 628/1691 cut-off events. [2024-11-20 17:39:51,786 INFO L125 PetriNetUnfolderBase]: For 9290/9358 co-relation queries the response was YES. [2024-11-20 17:39:51,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7044 conditions, 1691 events. 628/1691 cut-off events. For 9290/9358 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11073 event pairs, 46 based on Foata normal form. 22/1696 useless extension candidates. Maximal degree in co-relation 6912. Up to 952 conditions per place. [2024-11-20 17:39:51,798 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 57 selfloop transitions, 8 changer transitions 1/81 dead transitions. [2024-11-20 17:39:51,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 81 transitions, 806 flow [2024-11-20 17:39:51,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:39:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:39:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-11-20 17:39:51,799 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-11-20 17:39:51,799 INFO L175 Difference]: Start difference. First operand has 101 places, 63 transitions, 498 flow. Second operand 4 states and 110 transitions. [2024-11-20 17:39:51,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 81 transitions, 806 flow [2024-11-20 17:39:51,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 81 transitions, 798 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 17:39:51,813 INFO L231 Difference]: Finished difference. Result has 105 places, 64 transitions, 546 flow [2024-11-20 17:39:51,813 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=546, PETRI_PLACES=105, PETRI_TRANSITIONS=64} [2024-11-20 17:39:51,814 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-11-20 17:39:51,814 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 64 transitions, 546 flow [2024-11-20 17:39:51,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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 17:39:51,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:51,814 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-20 17:39:51,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 17:39:51,815 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:51,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:51,815 INFO L85 PathProgramCache]: Analyzing trace with hash -117255083, now seen corresponding path program 2 times [2024-11-20 17:39:51,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:51,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664140272] [2024-11-20 17:39:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:51,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:52,428 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-20 17:39:52,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:52,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664140272] [2024-11-20 17:39:52,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664140272] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:52,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158721850] [2024-11-20 17:39:52,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:39:52,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:52,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:52,432 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 17:39:52,433 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 17:39:52,565 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:39:52,565 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:39:52,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-20 17:39:52,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:52,578 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 17:39:52,641 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-20 17:39:52,642 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 17:39:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:53,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:39:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-20 17:39:53,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158721850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:39:53,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:39:53,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 35 [2024-11-20 17:39:53,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528683387] [2024-11-20 17:39:53,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:39:53,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-20 17:39:53,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:39:53,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-20 17:39:53,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2024-11-20 17:39:54,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-11-20 17:39:54,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 64 transitions, 546 flow. Second operand has 37 states, 37 states have (on average 17.945945945945947) internal successors, (664), 37 states have internal predecessors, (664), 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 17:39:54,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:39:54,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-11-20 17:39:54,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:39:56,120 INFO L124 PetriNetUnfolderBase]: 928/2016 cut-off events. [2024-11-20 17:39:56,121 INFO L125 PetriNetUnfolderBase]: For 13212/13271 co-relation queries the response was YES. [2024-11-20 17:39:56,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8727 conditions, 2016 events. 928/2016 cut-off events. For 13212/13271 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 12246 event pairs, 143 based on Foata normal form. 28/2002 useless extension candidates. Maximal degree in co-relation 8592. Up to 342 conditions per place. [2024-11-20 17:39:56,144 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 121 selfloop transitions, 26 changer transitions 0/158 dead transitions. [2024-11-20 17:39:56,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 158 transitions, 1554 flow [2024-11-20 17:39:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 17:39:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-20 17:39:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 460 transitions. [2024-11-20 17:39:56,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-11-20 17:39:56,147 INFO L175 Difference]: Start difference. First operand has 105 places, 64 transitions, 546 flow. Second operand 22 states and 460 transitions. [2024-11-20 17:39:56,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 158 transitions, 1554 flow [2024-11-20 17:39:56,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 158 transitions, 1532 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-20 17:39:56,164 INFO L231 Difference]: Finished difference. Result has 123 places, 65 transitions, 604 flow [2024-11-20 17:39:56,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=604, PETRI_PLACES=123, PETRI_TRANSITIONS=65} [2024-11-20 17:39:56,165 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-11-20 17:39:56,165 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 65 transitions, 604 flow [2024-11-20 17:39:56,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 17.945945945945947) internal successors, (664), 37 states have internal predecessors, (664), 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 17:39:56,166 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:39:56,166 INFO L204 CegarLoopForPetriNet]: trace histogram [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 17:39:56,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 17:39:56,367 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,SelfDestructingSolverStorable20 [2024-11-20 17:39:56,367 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-20 17:39:56,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:39:56,369 INFO L85 PathProgramCache]: Analyzing trace with hash -438428342, now seen corresponding path program 1 times [2024-11-20 17:39:56,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:39:56,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934907226] [2024-11-20 17:39:56,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:56,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:39:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:57,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:39:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934907226] [2024-11-20 17:39:57,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934907226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:39:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436421553] [2024-11-20 17:39:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:39:57,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:39:57,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:39:57,718 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 17:39:57,719 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 17:39:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:39:57,841 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-20 17:39:57,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:39:58,080 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:39:58,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 23 [2024-11-20 17:39:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:39:58,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:40:11,511 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-20 17:40:11,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2024-11-20 17:40:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-20 17:40:11,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436421553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:40:11,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:40:11,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-20 17:40:11,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111512953] [2024-11-20 17:40:11,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:40:11,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 17:40:11,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:40:11,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 17:40:11,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=637, Unknown=3, NotChecked=0, Total=756 [2024-11-20 17:40:15,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:19,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:23,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:27,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:31,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:35,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:40,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:44,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:48,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:52,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-20 17:40:52,419 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-11-20 17:40:52,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 65 transitions, 604 flow. Second operand has 28 states, 28 states have (on average 9.107142857142858) internal successors, (255), 28 states have internal predecessors, (255), 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 17:40:52,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:40:52,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-11-20 17:40:52,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand