./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi000_tso.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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 ../../../trunk/examples/svcomp/pthread-wmm/rfi000_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 5128c539cd3051e20c09e1924eb0951d5be697be251e10d3c281464ed4c436cd --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:22:03,344 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:22:03,420 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:22:03,425 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:22:03,425 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:22:03,451 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:22:03,452 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:22:03,453 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:22:03,453 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:22:03,456 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:22:03,456 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:22:03,457 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:22:03,457 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:22:03,458 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:22:03,459 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:22:03,459 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:22:03,459 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:22:03,459 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:22:03,459 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:22:03,460 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:22:03,460 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:22:03,460 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:22:03,460 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:22:03,460 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:22:03,461 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:22:03,461 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:22:03,461 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:22:03,461 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:22:03,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:22:03,462 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:22:03,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:22:03,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:22:03,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:22:03,463 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:22:03,463 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:22:03,464 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:22:03,464 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:22:03,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:22:03,464 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:22:03,464 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:22:03,464 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:22:03,465 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:22:03,465 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:22:03,465 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5128c539cd3051e20c09e1924eb0951d5be697be251e10d3c281464ed4c436cd [2024-06-27 16:22:03,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:22:03,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:22:03,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:22:03,704 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:22:03,704 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:22:03,705 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi000_tso.i [2024-06-27 16:22:04,775 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:22:04,970 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:22:04,970 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi000_tso.i [2024-06-27 16:22:04,988 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f3b05adf/0bbf90438dd44ae9b19354271d260af5/FLAG581729ebf [2024-06-27 16:22:05,001 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f3b05adf/0bbf90438dd44ae9b19354271d260af5 [2024-06-27 16:22:05,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:22:05,004 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:22:05,006 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:22:05,006 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:22:05,010 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:22:05,011 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,012 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1779ea73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05, skipping insertion in model container [2024-06-27 16:22:05,012 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,079 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:22:05,201 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi000_tso.i[944,957] [2024-06-27 16:22:05,392 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:22:05,401 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:22:05,413 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi000_tso.i[944,957] [2024-06-27 16:22:05,470 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:22:05,516 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:22:05,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05 WrapperNode [2024-06-27 16:22:05,516 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:22:05,517 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:22:05,517 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:22:05,517 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:22:05,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,551 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,583 INFO L138 Inliner]: procedures = 174, calls = 37, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 167 [2024-06-27 16:22:05,584 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:22:05,585 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:22:05,585 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:22:05,585 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:22:05,594 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,609 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,632 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]. [2024-06-27 16:22:05,633 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,633 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,638 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,649 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,651 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,656 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:22:05,660 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:22:05,660 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:22:05,660 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:22:05,661 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (1/1) ... [2024-06-27 16:22:05,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:22:05,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:22:05,693 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) [2024-06-27 16:22:05,705 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 [2024-06-27 16:22:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 16:22:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:22:05,747 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 16:22:05,747 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 16:22:05,748 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 16:22:05,748 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 16:22:05,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:22:05,750 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 16:22:05,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:22:05,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:22:05,751 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:22:05,892 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:22:05,894 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:22:06,140 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:22:06,141 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:22:06,329 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:22:06,329 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 16:22:06,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:22:06 BoogieIcfgContainer [2024-06-27 16:22:06,330 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:22:06,332 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:22:06,333 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:22:06,335 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:22:06,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:22:05" (1/3) ... [2024-06-27 16:22:06,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57edb087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:22:06, skipping insertion in model container [2024-06-27 16:22:06,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:22:05" (2/3) ... [2024-06-27 16:22:06,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57edb087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:22:06, skipping insertion in model container [2024-06-27 16:22:06,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:22:06" (3/3) ... [2024-06-27 16:22:06,341 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi000_tso.i [2024-06-27 16:22:06,349 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:22:06,356 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:22:06,357 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-27 16:22:06,357 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:22:06,393 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 16:22:06,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 32 transitions, 72 flow [2024-06-27 16:22:06,451 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2024-06-27 16:22:06,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:22:06,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 1/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 48 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2024-06-27 16:22:06,457 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 32 transitions, 72 flow [2024-06-27 16:22:06,460 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 30 transitions, 66 flow [2024-06-27 16:22:06,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:22:06,480 INFO L357 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, mHoare=true, 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;@7e62eb9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:22:06,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-06-27 16:22:06,490 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:22:06,491 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2024-06-27 16:22:06,491 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:22:06,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:22:06,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:22:06,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:22:06,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:22:06,496 INFO L85 PathProgramCache]: Analyzing trace with hash -710585529, now seen corresponding path program 1 times [2024-06-27 16:22:06,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:22:06,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894053043] [2024-06-27 16:22:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:22:06,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:22:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:22:06,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:22:06,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:22:06,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894053043] [2024-06-27 16:22:06,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894053043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:22:06,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:22:06,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 16:22:06,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628756418] [2024-06-27 16:22:06,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:22:06,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 16:22:06,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:22:06,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 16:22:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 16:22:06,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 32 [2024-06-27 16:22:06,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-06-27 16:22:06,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:22:06,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 32 [2024-06-27 16:22:06,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:22:07,104 INFO L124 PetriNetUnfolderBase]: 176/352 cut-off events. [2024-06-27 16:22:07,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 16:22:07,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673 conditions, 352 events. 176/352 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1764 event pairs, 16 based on Foata normal form. 18/361 useless extension candidates. Maximal degree in co-relation 663. Up to 266 conditions per place. [2024-06-27 16:22:07,111 INFO L140 encePairwiseOnDemand]: 28/32 looper letters, 21 selfloop transitions, 2 changer transitions 2/36 dead transitions. [2024-06-27 16:22:07,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 128 flow [2024-06-27 16:22:07,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 16:22:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 16:22:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-06-27 16:22:07,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6979166666666666 [2024-06-27 16:22:07,125 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 66 flow. Second operand 3 states and 67 transitions. [2024-06-27 16:22:07,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 128 flow [2024-06-27 16:22:07,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:22:07,130 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 62 flow [2024-06-27 16:22:07,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, 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=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2024-06-27 16:22:07,135 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2024-06-27 16:22:07,136 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 62 flow [2024-06-27 16:22:07,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2024-06-27 16:22:07,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:22:07,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:22:07,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:22:07,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:22:07,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:22:07,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1753067114, now seen corresponding path program 1 times [2024-06-27 16:22:07,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:22:07,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644528954] [2024-06-27 16:22:07,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:22:07,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:22:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:22:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:22:07,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:22:07,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644528954] [2024-06-27 16:22:07,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644528954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:22:07,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:22:07,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:22:07,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706992861] [2024-06-27 16:22:07,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:22:07,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:22:07,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:22:07,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:22:07,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:22:07,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 16:22:07,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2024-06-27 16:22:07,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:22:07,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 16:22:07,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:22:07,548 INFO L124 PetriNetUnfolderBase]: 221/465 cut-off events. [2024-06-27 16:22:07,549 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-27 16:22:07,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 905 conditions, 465 events. 221/465 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2249 event pairs, 38 based on Foata normal form. 28/471 useless extension candidates. Maximal degree in co-relation 895. Up to 216 conditions per place. [2024-06-27 16:22:07,554 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 34 selfloop transitions, 4 changer transitions 1/47 dead transitions. [2024-06-27 16:22:07,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 47 transitions, 186 flow [2024-06-27 16:22:07,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:22:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:22:07,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-06-27 16:22:07,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6328125 [2024-06-27 16:22:07,558 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 62 flow. Second operand 4 states and 81 transitions. [2024-06-27 16:22:07,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 47 transitions, 186 flow [2024-06-27 16:22:07,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 16:22:07,563 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 84 flow [2024-06-27 16:22:07,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-06-27 16:22:07,564 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-06-27 16:22:07,565 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 84 flow [2024-06-27 16:22:07,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 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) [2024-06-27 16:22:07,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:22:07,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:22:07,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 16:22:07,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:22:07,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:22:07,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1039214016, now seen corresponding path program 1 times [2024-06-27 16:22:07,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:22:07,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708223379] [2024-06-27 16:22:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:22:07,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:22:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:22:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:22:07,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:22:07,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708223379] [2024-06-27 16:22:07,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708223379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:22:07,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:22:07,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:22:07,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253908403] [2024-06-27 16:22:07,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:22:07,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:22:07,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:22:07,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:22:07,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:22:07,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 32 [2024-06-27 16:22:07,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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) [2024-06-27 16:22:07,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:22:07,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 32 [2024-06-27 16:22:07,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:22:07,906 INFO L124 PetriNetUnfolderBase]: 110/232 cut-off events. [2024-06-27 16:22:07,906 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-06-27 16:22:07,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 232 events. 110/232 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 809 event pairs, 26 based on Foata normal form. 18/242 useless extension candidates. Maximal degree in co-relation 537. Up to 101 conditions per place. [2024-06-27 16:22:07,908 INFO L140 encePairwiseOnDemand]: 27/32 looper letters, 28 selfloop transitions, 6 changer transitions 1/43 dead transitions. [2024-06-27 16:22:07,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 187 flow [2024-06-27 16:22:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:22:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:22:07,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-27 16:22:07,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-27 16:22:07,911 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 84 flow. Second operand 5 states and 87 transitions. [2024-06-27 16:22:07,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 187 flow [2024-06-27 16:22:07,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 43 transitions, 178 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-27 16:22:07,914 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 100 flow [2024-06-27 16:22:07,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2024-06-27 16:22:07,915 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2024-06-27 16:22:07,915 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 100 flow [2024-06-27 16:22:07,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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) [2024-06-27 16:22:07,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:22:07,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:22:07,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:22:07,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:22:07,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:22:07,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1541160680, now seen corresponding path program 1 times [2024-06-27 16:22:07,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:22:07,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561738223] [2024-06-27 16:22:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:22:07,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:22:08,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:22:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:22:09,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:22:09,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561738223] [2024-06-27 16:22:09,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561738223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:22:09,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:22:09,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 16:22:09,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670165112] [2024-06-27 16:22:09,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:22:09,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 16:22:09,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:22:09,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 16:22:09,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:22:09,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 32 [2024-06-27 16:22:09,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 100 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:22:09,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:22:09,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 32 [2024-06-27 16:22:09,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:22:09,396 INFO L124 PetriNetUnfolderBase]: 127/305 cut-off events. [2024-06-27 16:22:09,396 INFO L125 PetriNetUnfolderBase]: For 107/107 co-relation queries the response was YES. [2024-06-27 16:22:09,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 305 events. 127/305 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1235 event pairs, 37 based on Foata normal form. 4/299 useless extension candidates. Maximal degree in co-relation 676. Up to 106 conditions per place. [2024-06-27 16:22:09,398 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 23 selfloop transitions, 12 changer transitions 14/60 dead transitions. [2024-06-27 16:22:09,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 60 transitions, 266 flow [2024-06-27 16:22:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:22:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:22:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 16:22:09,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-06-27 16:22:09,399 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 100 flow. Second operand 9 states and 149 transitions. [2024-06-27 16:22:09,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 60 transitions, 266 flow [2024-06-27 16:22:09,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 60 transitions, 232 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 16:22:09,402 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 144 flow [2024-06-27 16:22:09,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=144, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2024-06-27 16:22:09,403 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2024-06-27 16:22:09,403 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 144 flow [2024-06-27 16:22:09,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:22:09,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:22:09,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:22:09,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 16:22:09,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:22:09,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:22:09,404 INFO L85 PathProgramCache]: Analyzing trace with hash 795090600, now seen corresponding path program 2 times [2024-06-27 16:22:09,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:22:09,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718980852] [2024-06-27 16:22:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:22:09,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:22:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:22:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:22:10,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:22:10,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718980852] [2024-06-27 16:22:10,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718980852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:22:10,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:22:10,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 16:22:10,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435744066] [2024-06-27 16:22:10,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:22:10,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 16:22:10,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:22:10,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 16:22:10,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 16:22:10,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 32 [2024-06-27 16:22:10,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 144 flow. Second operand has 12 states, 12 states have (on average 12.333333333333334) internal successors, (148), 12 states have internal predecessors, (148), 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) [2024-06-27 16:22:10,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:22:10,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 32 [2024-06-27 16:22:10,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:22:11,419 INFO L124 PetriNetUnfolderBase]: 124/304 cut-off events. [2024-06-27 16:22:11,419 INFO L125 PetriNetUnfolderBase]: For 35/38 co-relation queries the response was YES. [2024-06-27 16:22:11,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733 conditions, 304 events. 124/304 cut-off events. For 35/38 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1278 event pairs, 34 based on Foata normal form. 4/299 useless extension candidates. Maximal degree in co-relation 717. Up to 143 conditions per place. [2024-06-27 16:22:11,422 INFO L140 encePairwiseOnDemand]: 23/32 looper letters, 31 selfloop transitions, 8 changer transitions 18/68 dead transitions. [2024-06-27 16:22:11,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 68 transitions, 354 flow [2024-06-27 16:22:11,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 16:22:11,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 16:22:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 16:22:11,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034722222222222 [2024-06-27 16:22:11,424 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 144 flow. Second operand 9 states and 145 transitions. [2024-06-27 16:22:11,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 68 transitions, 354 flow [2024-06-27 16:22:11,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 341 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 16:22:11,428 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 196 flow [2024-06-27 16:22:11,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=196, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2024-06-27 16:22:11,429 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2024-06-27 16:22:11,429 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 196 flow [2024-06-27 16:22:11,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.333333333333334) internal successors, (148), 12 states have internal predecessors, (148), 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) [2024-06-27 16:22:11,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:22:11,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:22:11,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:22:11,430 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:22:11,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:22:11,431 INFO L85 PathProgramCache]: Analyzing trace with hash 791937438, now seen corresponding path program 3 times [2024-06-27 16:22:11,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:22:11,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706316645] [2024-06-27 16:22:11,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:22:11,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:22:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:22:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:22:12,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:22:12,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706316645] [2024-06-27 16:22:12,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706316645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:22:12,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:22:12,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 16:22:12,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626066238] [2024-06-27 16:22:12,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:22:12,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 16:22:12,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:22:12,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 16:22:12,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 16:22:12,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 32 [2024-06-27 16:22:12,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 196 flow. Second operand has 12 states, 12 states have (on average 12.333333333333334) internal successors, (148), 12 states have internal predecessors, (148), 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) [2024-06-27 16:22:12,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:22:12,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 32 [2024-06-27 16:22:12,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:22:12,636 INFO L124 PetriNetUnfolderBase]: 118/288 cut-off events. [2024-06-27 16:22:12,637 INFO L125 PetriNetUnfolderBase]: For 95/101 co-relation queries the response was YES. [2024-06-27 16:22:12,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 288 events. 118/288 cut-off events. For 95/101 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1153 event pairs, 34 based on Foata normal form. 6/285 useless extension candidates. Maximal degree in co-relation 715. Up to 106 conditions per place. [2024-06-27 16:22:12,639 INFO L140 encePairwiseOnDemand]: 22/32 looper letters, 22 selfloop transitions, 13 changer transitions 21/67 dead transitions. [2024-06-27 16:22:12,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 368 flow [2024-06-27 16:22:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 16:22:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 16:22:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 175 transitions. [2024-06-27 16:22:12,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971590909090909 [2024-06-27 16:22:12,640 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 196 flow. Second operand 11 states and 175 transitions. [2024-06-27 16:22:12,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 368 flow [2024-06-27 16:22:12,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 343 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 16:22:12,643 INFO L231 Difference]: Finished difference. Result has 63 places, 39 transitions, 200 flow [2024-06-27 16:22:12,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=200, PETRI_PLACES=63, PETRI_TRANSITIONS=39} [2024-06-27 16:22:12,643 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2024-06-27 16:22:12,643 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 39 transitions, 200 flow [2024-06-27 16:22:12,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.333333333333334) internal successors, (148), 12 states have internal predecessors, (148), 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) [2024-06-27 16:22:12,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:22:12,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:22:12,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 16:22:12,644 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-06-27 16:22:12,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:22:12,645 INFO L85 PathProgramCache]: Analyzing trace with hash 14549970, now seen corresponding path program 4 times [2024-06-27 16:22:12,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:22:12,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536915056] [2024-06-27 16:22:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:22:12,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:22:12,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:22:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:22:13,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:22:13,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536915056] [2024-06-27 16:22:13,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536915056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:22:13,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:22:13,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 16:22:13,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648445500] [2024-06-27 16:22:13,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:22:13,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:22:13,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:22:13,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:22:13,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 16:22:13,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 32 [2024-06-27 16:22:13,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 39 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 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) [2024-06-27 16:22:13,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:22:13,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 32 [2024-06-27 16:22:13,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:22:13,202 INFO L124 PetriNetUnfolderBase]: 95/209 cut-off events. [2024-06-27 16:22:13,203 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2024-06-27 16:22:13,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 209 events. 95/209 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 713 event pairs, 12 based on Foata normal form. 4/209 useless extension candidates. Maximal degree in co-relation 616. Up to 110 conditions per place. [2024-06-27 16:22:13,205 INFO L140 encePairwiseOnDemand]: 26/32 looper letters, 0 selfloop transitions, 0 changer transitions 49/49 dead transitions. [2024-06-27 16:22:13,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 49 transitions, 333 flow [2024-06-27 16:22:13,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:22:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:22:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-06-27 16:22:13,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 16:22:13,207 INFO L175 Difference]: Start difference. First operand has 63 places, 39 transitions, 200 flow. Second operand 6 states and 84 transitions. [2024-06-27 16:22:13,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 49 transitions, 333 flow [2024-06-27 16:22:13,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 259 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-06-27 16:22:13,208 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2024-06-27 16:22:13,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2024-06-27 16:22:13,209 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2024-06-27 16:22:13,209 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2024-06-27 16:22:13,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 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) [2024-06-27 16:22:13,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2024-06-27 16:22:13,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-06-27 16:22:13,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2024-06-27 16:22:13,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2024-06-27 16:22:13,213 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-06-27 16:22:13,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 16:22:13,213 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1] [2024-06-27 16:22:13,217 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-27 16:22:13,217 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-27 16:22:13,221 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.06 04:22:13 BasicIcfg [2024-06-27 16:22:13,221 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-27 16:22:13,222 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-06-27 16:22:13,222 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-06-27 16:22:13,232 INFO L274 PluginConnector]: Witness Printer initialized [2024-06-27 16:22:13,233 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:22:06" (3/4) ... [2024-06-27 16:22:13,234 INFO L137 WitnessPrinter]: Generating witness for correct program [2024-06-27 16:22:13,236 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P0 [2024-06-27 16:22:13,236 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure P1 [2024-06-27 16:22:13,242 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 74 nodes and edges [2024-06-27 16:22:13,242 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-06-27 16:22:13,242 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-06-27 16:22:13,242 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-06-27 16:22:13,323 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-06-27 16:22:13,323 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-06-27 16:22:13,323 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-06-27 16:22:13,324 INFO L158 Benchmark]: Toolchain (without parser) took 8319.57ms. Allocated memory was 127.9MB in the beginning and 352.3MB in the end (delta: 224.4MB). Free memory was 55.1MB in the beginning and 156.5MB in the end (delta: -101.3MB). Peak memory consumption was 124.1MB. Max. memory is 16.1GB. [2024-06-27 16:22:13,324 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 127.9MB. Free memory is still 87.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-27 16:22:13,324 INFO L158 Benchmark]: CACSL2BoogieTranslator took 510.33ms. Allocated memory was 127.9MB in the beginning and 184.5MB in the end (delta: 56.6MB). Free memory was 54.9MB in the beginning and 134.3MB in the end (delta: -79.4MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. [2024-06-27 16:22:13,325 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.78ms. Allocated memory is still 184.5MB. Free memory was 134.3MB in the beginning and 131.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-27 16:22:13,325 INFO L158 Benchmark]: Boogie Preprocessor took 74.13ms. Allocated memory is still 184.5MB. Free memory was 131.1MB in the beginning and 126.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 16:22:13,325 INFO L158 Benchmark]: RCFGBuilder took 670.40ms. Allocated memory is still 184.5MB. Free memory was 126.9MB in the beginning and 69.3MB in the end (delta: 57.7MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. [2024-06-27 16:22:13,325 INFO L158 Benchmark]: TraceAbstraction took 6889.06ms. Allocated memory was 184.5MB in the beginning and 352.3MB in the end (delta: 167.8MB). Free memory was 68.2MB in the beginning and 161.7MB in the end (delta: -93.5MB). Peak memory consumption was 75.3MB. Max. memory is 16.1GB. [2024-06-27 16:22:13,326 INFO L158 Benchmark]: Witness Printer took 101.96ms. Allocated memory is still 352.3MB. Free memory was 160.7MB in the beginning and 156.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-27 16:22:13,328 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 127.9MB. Free memory is still 87.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 510.33ms. Allocated memory was 127.9MB in the beginning and 184.5MB in the end (delta: 56.6MB). Free memory was 54.9MB in the beginning and 134.3MB in the end (delta: -79.4MB). Peak memory consumption was 13.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 66.78ms. Allocated memory is still 184.5MB. Free memory was 134.3MB in the beginning and 131.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.13ms. Allocated memory is still 184.5MB. Free memory was 131.1MB in the beginning and 126.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 670.40ms. Allocated memory is still 184.5MB. Free memory was 126.9MB in the beginning and 69.3MB in the end (delta: 57.7MB). Peak memory consumption was 58.7MB. Max. memory is 16.1GB. * TraceAbstraction took 6889.06ms. Allocated memory was 184.5MB in the beginning and 352.3MB in the end (delta: 167.8MB). Free memory was 68.2MB in the beginning and 161.7MB in the end (delta: -93.5MB). Peak memory consumption was 75.3MB. Max. memory is 16.1GB. * Witness Printer took 101.96ms. Allocated memory is still 352.3MB. Free memory was 160.7MB in the beginning and 156.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: 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: 18]: 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, 51 locations, 5 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: 6.8s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 240 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 223 mSDsluCounter, 225 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 208 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 949 IncrementalHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 17 mSDtfsCounter, 949 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=200occurred in iteration=6, InterpolantAutomatonStates: 47, 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, 0.3s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 132 NumberOfCodeBlocks, 132 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 125 ConstructedInterpolants, 0 QuantifiedInterpolants, 1601 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 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-27 16:22:13,362 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