./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/rfi002_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/rfi002_tso.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 48e6a57243e80a87d178da358ff4ad1dd63b86003507ef0dec3764d15038130a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:25:29,372 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:25:29,438 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:25:29,443 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:25:29,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:25:29,471 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:25:29,473 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:25:29,473 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:25:29,474 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:25:29,474 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:25:29,474 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:25:29,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:25:29,475 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:25:29,476 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:25:29,477 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:25:29,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:25:29,478 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:25:29,478 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:25:29,478 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:25:29,479 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:25:29,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:25:29,479 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:25:29,480 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:25:29,483 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:25:29,483 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:25:29,483 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:25:29,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:25:29,484 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:25:29,484 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:25:29,484 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:25:29,484 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:25:29,484 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:25:29,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:25:29,485 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:25:29,485 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:25:29,485 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:25:29,485 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:25:29,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:25:29,486 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:25:29,486 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:25:29,486 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:25:29,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:25:29,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 48e6a57243e80a87d178da358ff4ad1dd63b86003507ef0dec3764d15038130a [2024-11-20 09:25:29,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:25:29,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:25:29,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:25:29,705 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:25:29,706 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:25:29,707 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/rfi002_tso.i [2024-11-20 09:25:31,237 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:25:31,607 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:25:31,608 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/rfi002_tso.i [2024-11-20 09:25:31,637 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/823fa9876/bbba6df41ba0491084cfa63368d4fbb1/FLAG4708560a5 [2024-11-20 09:25:31,820 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/823fa9876/bbba6df41ba0491084cfa63368d4fbb1 [2024-11-20 09:25:31,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:25:31,827 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:25:31,829 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:25:31,830 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:25:31,838 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:25:31,843 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:25:31" (1/1) ... [2024-11-20 09:25:31,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f66a27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:31, skipping insertion in model container [2024-11-20 09:25:31,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:25:31" (1/1) ... [2024-11-20 09:25:31,880 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:25:32,093 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/rfi002_tso.i[987,1000] [2024-11-20 09:25:32,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:25:32,388 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:25:32,409 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/rfi002_tso.i[987,1000] [2024-11-20 09:25:32,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:25:32,591 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:25:32,591 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32 WrapperNode [2024-11-20 09:25:32,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:25:32,592 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:25:32,594 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:25:32,594 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:25:32,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (1/1) ... [2024-11-20 09:25:32,629 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (1/1) ... [2024-11-20 09:25:32,751 INFO L138 Inliner]: procedures = 174, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 206 [2024-11-20 09:25:32,781 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:25:32,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:25:32,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:25:32,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:25:32,808 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (1/1) ... [2024-11-20 09:25:32,809 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (1/1) ... [2024-11-20 09:25:32,814 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (1/1) ... [2024-11-20 09:25:32,868 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-20 09:25:32,872 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (1/1) ... [2024-11-20 09:25:32,872 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (1/1) ... [2024-11-20 09:25:32,891 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (1/1) ... [2024-11-20 09:25:32,897 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (1/1) ... [2024-11-20 09:25:32,902 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (1/1) ... [2024-11-20 09:25:32,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (1/1) ... [2024-11-20 09:25:32,920 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:25:32,921 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:25:32,921 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:25:32,921 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:25:32,922 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (1/1) ... [2024-11-20 09:25:32,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:25:32,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:25:32,985 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 09:25:32,987 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 09:25:33,068 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 09:25:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:25:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-11-20 09:25:33,072 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-11-20 09:25:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-11-20 09:25:33,073 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-11-20 09:25:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:25:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 09:25:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:25:33,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:25:33,075 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 09:25:33,297 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:25:33,302 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:25:33,926 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:25:33,930 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:25:34,481 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:25:34,481 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-20 09:25:34,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:25:34 BoogieIcfgContainer [2024-11-20 09:25:34,482 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:25:34,484 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:25:34,484 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:25:34,491 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:25:34,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:25:31" (1/3) ... [2024-11-20 09:25:34,492 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2081a9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:25:34, skipping insertion in model container [2024-11-20 09:25:34,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:32" (2/3) ... [2024-11-20 09:25:34,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2081a9f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:25:34, skipping insertion in model container [2024-11-20 09:25:34,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:25:34" (3/3) ... [2024-11-20 09:25:34,498 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi002_tso.i [2024-11-20 09:25:34,527 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:25:34,530 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-11-20 09:25:34,530 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:25:34,655 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-20 09:25:34,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 40 places, 34 transitions, 76 flow [2024-11-20 09:25:34,778 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2024-11-20 09:25:34,778 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 09:25:34,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 32 events. 1/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2024-11-20 09:25:34,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 34 transitions, 76 flow [2024-11-20 09:25:34,793 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 32 transitions, 70 flow [2024-11-20 09:25:34,810 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:25:34,823 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=LoopHeads, 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;@57862ddd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:25:34,825 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-11-20 09:25:34,834 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:25:34,838 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2024-11-20 09:25:34,839 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 09:25:34,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:25:34,839 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 09:25:34,840 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-20 09:25:34,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:25:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1507080655, now seen corresponding path program 1 times [2024-11-20 09:25:34,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:25:34,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521874847] [2024-11-20 09:25:34,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:25:34,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:25:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:25:35,568 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 09:25:35,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:25:35,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521874847] [2024-11-20 09:25:35,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521874847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:25:35,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:25:35,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 09:25:35,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580075301] [2024-11-20 09:25:35,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:25:35,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:25:35,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:25:35,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:25:35,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:25:35,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-11-20 09:25:35,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 09:25:35,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:25:35,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-11-20 09:25:35,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:25:36,057 INFO L124 PetriNetUnfolderBase]: 438/790 cut-off events. [2024-11-20 09:25:36,057 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 09:25:36,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1535 conditions, 790 events. 438/790 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4143 event pairs, 32 based on Foata normal form. 40/785 useless extension candidates. Maximal degree in co-relation 1525. Up to 652 conditions per place. [2024-11-20 09:25:36,071 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 29 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-20 09:25:36,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 40 transitions, 148 flow [2024-11-20 09:25:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:25:36,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:25:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-20 09:25:36,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6568627450980392 [2024-11-20 09:25:36,096 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 70 flow. Second operand 3 states and 67 transitions. [2024-11-20 09:25:36,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 40 transitions, 148 flow [2024-11-20 09:25:36,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 09:25:36,108 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 68 flow [2024-11-20 09:25:36,110 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2024-11-20 09:25:36,122 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2024-11-20 09:25:36,122 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 68 flow [2024-11-20 09:25:36,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 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 09:25:36,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:25:36,123 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:25:36,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:25:36,123 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err1ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-20 09:25:36,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:25:36,127 INFO L85 PathProgramCache]: Analyzing trace with hash 525140496, now seen corresponding path program 1 times [2024-11-20 09:25:36,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:25:36,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48522634] [2024-11-20 09:25:36,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:25:36,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:25:36,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:25:36,351 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 09:25:36,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:25:36,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48522634] [2024-11-20 09:25:36,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48522634] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:25:36,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:25:36,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 09:25:36,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469222702] [2024-11-20 09:25:36,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:25:36,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:25:36,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:25:36,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:25:36,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:25:36,358 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2024-11-20 09:25:36,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:25:36,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:25:36,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2024-11-20 09:25:36,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:25:36,624 INFO L124 PetriNetUnfolderBase]: 380/717 cut-off events. [2024-11-20 09:25:36,624 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-20 09:25:36,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404 conditions, 717 events. 380/717 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3813 event pairs, 90 based on Foata normal form. 0/701 useless extension candidates. Maximal degree in co-relation 1394. Up to 466 conditions per place. [2024-11-20 09:25:36,630 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 26 selfloop transitions, 2 changer transitions 2/39 dead transitions. [2024-11-20 09:25:36,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 39 transitions, 146 flow [2024-11-20 09:25:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:25:36,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:25:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-20 09:25:36,633 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6274509803921569 [2024-11-20 09:25:36,633 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 68 flow. Second operand 3 states and 64 transitions. [2024-11-20 09:25:36,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 39 transitions, 146 flow [2024-11-20 09:25:36,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 39 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 09:25:36,634 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 64 flow [2024-11-20 09:25:36,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2024-11-20 09:25:36,635 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2024-11-20 09:25:36,636 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 64 flow [2024-11-20 09:25:36,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:25:36,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:25:36,636 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:25:36,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:25:36,637 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-20 09:25:36,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:25:36,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1548852309, now seen corresponding path program 1 times [2024-11-20 09:25:36,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:25:36,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64546554] [2024-11-20 09:25:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:25:36,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:25:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:25:36,951 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 09:25:36,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:25:36,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64546554] [2024-11-20 09:25:36,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64546554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:25:36,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:25:36,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 09:25:36,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234990045] [2024-11-20 09:25:36,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:25:36,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:25:36,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:25:36,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:25:36,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 09:25:36,960 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-11-20 09:25:36,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 09:25:36,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:25:36,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-11-20 09:25:36,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:25:37,210 INFO L124 PetriNetUnfolderBase]: 355/708 cut-off events. [2024-11-20 09:25:37,210 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-20 09:25:37,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1386 conditions, 708 events. 355/708 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3362 event pairs, 103 based on Foata normal form. 48/728 useless extension candidates. Maximal degree in co-relation 1376. Up to 291 conditions per place. [2024-11-20 09:25:37,214 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 43 selfloop transitions, 4 changer transitions 1/54 dead transitions. [2024-11-20 09:25:37,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 54 transitions, 218 flow [2024-11-20 09:25:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:25:37,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:25:37,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2024-11-20 09:25:37,216 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6029411764705882 [2024-11-20 09:25:37,216 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 64 flow. Second operand 4 states and 82 transitions. [2024-11-20 09:25:37,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 54 transitions, 218 flow [2024-11-20 09:25:37,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 54 transitions, 210 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 09:25:37,218 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 86 flow [2024-11-20 09:25:37,218 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2024-11-20 09:25:37,218 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2024-11-20 09:25:37,219 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 86 flow [2024-11-20 09:25:37,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 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 09:25:37,219 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:25:37,219 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:25:37,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:25:37,220 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-20 09:25:37,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:25:37,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1858141452, now seen corresponding path program 1 times [2024-11-20 09:25:37,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:25:37,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938607242] [2024-11-20 09:25:37,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:25:37,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:25:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:25:37,669 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 09:25:37,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:25:37,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938607242] [2024-11-20 09:25:37,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938607242] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:25:37,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:25:37,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:25:37,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380363782] [2024-11-20 09:25:37,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:25:37,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:25:37,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:25:37,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:25:37,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:25:37,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-11-20 09:25:37,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 09:25:37,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:25:37,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-11-20 09:25:37,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:25:37,874 INFO L124 PetriNetUnfolderBase]: 177/346 cut-off events. [2024-11-20 09:25:37,875 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-20 09:25:37,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 808 conditions, 346 events. 177/346 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1207 event pairs, 69 based on Foata normal form. 24/362 useless extension candidates. Maximal degree in co-relation 796. Up to 146 conditions per place. [2024-11-20 09:25:37,877 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 34 selfloop transitions, 6 changer transitions 1/47 dead transitions. [2024-11-20 09:25:37,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 207 flow [2024-11-20 09:25:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:25:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:25:37,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-11-20 09:25:37,878 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48823529411764705 [2024-11-20 09:25:37,878 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 86 flow. Second operand 5 states and 83 transitions. [2024-11-20 09:25:37,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 207 flow [2024-11-20 09:25:37,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 47 transitions, 198 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-20 09:25:37,881 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 102 flow [2024-11-20 09:25:37,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2024-11-20 09:25:37,888 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2024-11-20 09:25:37,889 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 102 flow [2024-11-20 09:25:37,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 09:25:37,893 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:25:37,893 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:25:37,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:25:37,894 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-20 09:25:37,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:25:37,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1985805631, now seen corresponding path program 1 times [2024-11-20 09:25:37,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:25:37,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303377819] [2024-11-20 09:25:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:25:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:25:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:25:40,555 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 09:25:40,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:25:40,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303377819] [2024-11-20 09:25:40,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303377819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:25:40,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:25:40,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-20 09:25:40,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805539540] [2024-11-20 09:25:40,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:25:40,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 09:25:40,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:25:40,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 09:25:40,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-20 09:25:40,576 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-20 09:25:40,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 102 flow. Second operand has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 11 states have internal predecessors, (118), 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 09:25:40,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:25:40,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-20 09:25:40,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:25:41,241 INFO L124 PetriNetUnfolderBase]: 263/557 cut-off events. [2024-11-20 09:25:41,241 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2024-11-20 09:25:41,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1263 conditions, 557 events. 263/557 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2514 event pairs, 40 based on Foata normal form. 4/551 useless extension candidates. Maximal degree in co-relation 1249. Up to 166 conditions per place. [2024-11-20 09:25:41,247 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 28 selfloop transitions, 5 changer transitions 31/73 dead transitions. [2024-11-20 09:25:41,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 73 transitions, 330 flow [2024-11-20 09:25:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:25:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:25:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-11-20 09:25:41,254 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.477124183006536 [2024-11-20 09:25:41,254 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 102 flow. Second operand 9 states and 146 transitions. [2024-11-20 09:25:41,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 73 transitions, 330 flow [2024-11-20 09:25:41,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 73 transitions, 290 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-11-20 09:25:41,256 INFO L231 Difference]: Finished difference. Result has 50 places, 33 transitions, 112 flow [2024-11-20 09:25:41,260 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=112, PETRI_PLACES=50, PETRI_TRANSITIONS=33} [2024-11-20 09:25:41,261 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2024-11-20 09:25:41,261 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 33 transitions, 112 flow [2024-11-20 09:25:41,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.727272727272727) internal successors, (118), 11 states have internal predecessors, (118), 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 09:25:41,261 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:25:41,262 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:25:41,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 09:25:41,262 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-20 09:25:41,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:25:41,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1415734003, now seen corresponding path program 2 times [2024-11-20 09:25:41,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:25:41,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724935832] [2024-11-20 09:25:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:25:41,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:25:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:25:42,500 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 09:25:42,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:25:42,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724935832] [2024-11-20 09:25:42,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724935832] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:25:42,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:25:42,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 09:25:42,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851751793] [2024-11-20 09:25:42,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:25:42,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:25:42,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:25:42,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:25:42,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:25:42,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-11-20 09:25:42,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 33 transitions, 112 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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 09:25:42,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:25:42,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-11-20 09:25:42,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:25:42,964 INFO L124 PetriNetUnfolderBase]: 194/437 cut-off events. [2024-11-20 09:25:42,964 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-20 09:25:42,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 437 events. 194/437 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1946 event pairs, 111 based on Foata normal form. 4/430 useless extension candidates. Maximal degree in co-relation 983. Up to 183 conditions per place. [2024-11-20 09:25:42,966 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 21 selfloop transitions, 2 changer transitions 20/53 dead transitions. [2024-11-20 09:25:42,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 251 flow [2024-11-20 09:25:42,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:25:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:25:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-11-20 09:25:42,967 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4950980392156863 [2024-11-20 09:25:42,968 INFO L175 Difference]: Start difference. First operand has 50 places, 33 transitions, 112 flow. Second operand 6 states and 101 transitions. [2024-11-20 09:25:42,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 251 flow [2024-11-20 09:25:42,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 53 transitions, 228 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-20 09:25:42,970 INFO L231 Difference]: Finished difference. Result has 47 places, 30 transitions, 98 flow [2024-11-20 09:25:42,970 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=98, PETRI_PLACES=47, PETRI_TRANSITIONS=30} [2024-11-20 09:25:42,971 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 9 predicate places. [2024-11-20 09:25:42,972 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 30 transitions, 98 flow [2024-11-20 09:25:42,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 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 09:25:42,972 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:25:42,972 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:25:42,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 09:25:42,973 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-11-20 09:25:42,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:25:42,973 INFO L85 PathProgramCache]: Analyzing trace with hash -299630815, now seen corresponding path program 3 times [2024-11-20 09:25:42,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:25:42,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7720317] [2024-11-20 09:25:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:25:42,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:25:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:25:46,239 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 09:25:46,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:25:46,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7720317] [2024-11-20 09:25:46,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7720317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:25:46,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:25:46,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-20 09:25:46,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016875318] [2024-11-20 09:25:46,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:25:46,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 09:25:46,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:25:46,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 09:25:46,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:25:46,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 34 [2024-11-20 09:25:46,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 30 transitions, 98 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 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 09:25:46,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:25:46,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 34 [2024-11-20 09:25:46,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:25:46,740 INFO L124 PetriNetUnfolderBase]: 90/202 cut-off events. [2024-11-20 09:25:46,740 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-11-20 09:25:46,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 202 events. 90/202 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 589 event pairs, 11 based on Foata normal form. 4/202 useless extension candidates. Maximal degree in co-relation 464. Up to 73 conditions per place. [2024-11-20 09:25:46,741 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 0 selfloop transitions, 0 changer transitions 41/41 dead transitions. [2024-11-20 09:25:46,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 186 flow [2024-11-20 09:25:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 09:25:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 09:25:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-11-20 09:25:46,742 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3897058823529412 [2024-11-20 09:25:46,742 INFO L175 Difference]: Start difference. First operand has 47 places, 30 transitions, 98 flow. Second operand 8 states and 106 transitions. [2024-11-20 09:25:46,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 186 flow [2024-11-20 09:25:46,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 41 transitions, 176 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-20 09:25:46,743 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2024-11-20 09:25:46,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2024-11-20 09:25:46,744 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2024-11-20 09:25:46,747 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2024-11-20 09:25:46,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 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 09:25:46,750 INFO L782 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2024-11-20 09:25:46,751 INFO L782 garLoopResultBuilder]: Registering result SAFE for location P1Err1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-11-20 09:25:46,755 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-11-20 09:25:46,755 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2024-11-20 09:25:46,755 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2024-11-20 09:25:46,756 INFO L782 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-11-20 09:25:46,756 INFO L782 garLoopResultBuilder]: Registering result SAFE for location P1Err1ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-11-20 09:25:46,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 09:25:46,756 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1] [2024-11-20 09:25:46,761 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-20 09:25:46,764 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-20 09:25:46,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:25:46 BasicIcfg [2024-11-20 09:25:46,776 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-20 09:25:46,777 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-20 09:25:46,777 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-20 09:25:46,777 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-20 09:25:46,777 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:25:34" (3/4) ... [2024-11-20 09:25:46,783 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-20 09:25:46,785 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2024-11-20 09:25:46,786 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2024-11-20 09:25:46,793 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 93 nodes and edges [2024-11-20 09:25:46,797 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2024-11-20 09:25:46,797 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-11-20 09:25:46,798 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-11-20 09:25:46,937 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-20 09:25:46,938 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-11-20 09:25:46,938 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-20 09:25:46,938 INFO L158 Benchmark]: Toolchain (without parser) took 15111.24ms. Allocated memory was 157.3MB in the beginning and 664.8MB in the end (delta: 507.5MB). Free memory was 100.4MB in the beginning and 401.6MB in the end (delta: -301.2MB). Peak memory consumption was 208.1MB. Max. memory is 16.1GB. [2024-11-20 09:25:46,942 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 157.3MB. Free memory is still 116.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-20 09:25:46,942 INFO L158 Benchmark]: CACSL2BoogieTranslator took 762.51ms. Allocated memory is still 157.3MB. Free memory was 100.0MB in the beginning and 69.3MB in the end (delta: 30.7MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-11-20 09:25:46,943 INFO L158 Benchmark]: Boogie Procedure Inliner took 188.89ms. Allocated memory is still 157.3MB. Free memory was 68.9MB in the beginning and 124.3MB in the end (delta: -55.4MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. [2024-11-20 09:25:46,943 INFO L158 Benchmark]: Boogie Preprocessor took 132.69ms. Allocated memory is still 157.3MB. Free memory was 124.3MB in the beginning and 118.8MB in the end (delta: 5.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-20 09:25:46,943 INFO L158 Benchmark]: RCFGBuilder took 1560.77ms. Allocated memory was 157.3MB in the beginning and 234.9MB in the end (delta: 77.6MB). Free memory was 118.8MB in the beginning and 175.4MB in the end (delta: -56.6MB). Peak memory consumption was 89.1MB. Max. memory is 16.1GB. [2024-11-20 09:25:46,943 INFO L158 Benchmark]: TraceAbstraction took 12292.58ms. Allocated memory was 234.9MB in the beginning and 664.8MB in the end (delta: 429.9MB). Free memory was 174.3MB in the beginning and 406.8MB in the end (delta: -232.5MB). Peak memory consumption was 197.5MB. Max. memory is 16.1GB. [2024-11-20 09:25:46,943 INFO L158 Benchmark]: Witness Printer took 161.17ms. Allocated memory is still 664.8MB. Free memory was 406.8MB in the beginning and 401.6MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-11-20 09:25:46,945 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 157.3MB. Free memory is still 116.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 762.51ms. Allocated memory is still 157.3MB. Free memory was 100.0MB in the beginning and 69.3MB in the end (delta: 30.7MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 188.89ms. Allocated memory is still 157.3MB. Free memory was 68.9MB in the beginning and 124.3MB in the end (delta: -55.4MB). Peak memory consumption was 5.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 132.69ms. Allocated memory is still 157.3MB. Free memory was 124.3MB in the beginning and 118.8MB in the end (delta: 5.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1560.77ms. Allocated memory was 157.3MB in the beginning and 234.9MB in the end (delta: 77.6MB). Free memory was 118.8MB in the beginning and 175.4MB in the end (delta: -56.6MB). Peak memory consumption was 89.1MB. Max. memory is 16.1GB. * TraceAbstraction took 12292.58ms. Allocated memory was 234.9MB in the beginning and 664.8MB in the end (delta: 429.9MB). Free memory was 174.3MB in the beginning and 406.8MB in the end (delta: -232.5MB). Peak memory consumption was 197.5MB. Max. memory is 16.1GB. * Witness Printer took 161.17ms. Allocated memory is still 664.8MB. Free memory was 406.8MB in the beginning and 401.6MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 19]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 19]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 55 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 12.0s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 254 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 244 mSDsluCounter, 138 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 127 mSDsCounter, 57 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 778 IncrementalHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 57 mSolverCounterUnsat, 11 mSDtfsCounter, 778 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=5, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 7.6s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 878 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-20 09:25:46,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE