./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-theta/unwind1-nondet.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/pthread-theta/unwind1-nondet.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 591990a0070f9287f734f2988edce5e1b5a43791c74b5c6b7374ff93ddaa2267 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:36:51,570 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:36:51,647 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:36:51,653 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:36:51,655 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:36:51,688 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:36:51,689 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:36:51,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:36:51,690 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:36:51,694 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:36:51,694 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:36:51,695 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:36:51,695 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:36:51,696 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:36:51,696 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:36:51,696 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:36:51,696 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:36:51,697 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:36:51,697 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:36:51,697 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:36:51,697 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:36:51,701 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:36:51,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:36:51,701 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:36:51,701 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:36:51,702 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:36:51,702 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:36:51,702 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:36:51,703 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:36:51,703 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:36:51,703 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:36:51,703 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:36:51,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:36:51,704 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:36:51,705 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:36:51,705 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:36:51,706 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:36:51,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:36:51,706 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:36:51,706 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:36:51,706 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:36:51,707 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:36:51,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 591990a0070f9287f734f2988edce5e1b5a43791c74b5c6b7374ff93ddaa2267 [2024-11-16 19:36:51,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:36:51,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:36:51,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:36:51,994 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:36:51,995 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:36:51,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/unwind1-nondet.i [2024-11-16 19:36:53,545 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:36:53,819 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:36:53,819 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind1-nondet.i [2024-11-16 19:36:53,838 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/858439119/1fe185d41dfd4636a8fb96de0861e88a/FLAGdbf4a947b [2024-11-16 19:36:53,858 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/858439119/1fe185d41dfd4636a8fb96de0861e88a [2024-11-16 19:36:53,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:36:53,861 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:36:53,862 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:36:53,862 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:36:53,869 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:36:53,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:36:53" (1/1) ... [2024-11-16 19:36:53,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d9b624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:53, skipping insertion in model container [2024-11-16 19:36:53,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:36:53" (1/1) ... [2024-11-16 19:36:53,911 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:36:54,271 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-theta/unwind1-nondet.i[33026,33039] [2024-11-16 19:36:54,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:36:54,301 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:36:54,345 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-theta/unwind1-nondet.i[33026,33039] [2024-11-16 19:36:54,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:36:54,394 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:36:54,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54 WrapperNode [2024-11-16 19:36:54,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:36:54,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:36:54,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:36:54,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:36:54,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (1/1) ... [2024-11-16 19:36:54,417 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (1/1) ... [2024-11-16 19:36:54,436 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2024-11-16 19:36:54,437 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:36:54,437 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:36:54,437 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:36:54,438 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:36:54,446 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (1/1) ... [2024-11-16 19:36:54,446 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (1/1) ... [2024-11-16 19:36:54,448 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (1/1) ... [2024-11-16 19:36:54,459 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]. [2024-11-16 19:36:54,460 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (1/1) ... [2024-11-16 19:36:54,460 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (1/1) ... [2024-11-16 19:36:54,464 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (1/1) ... [2024-11-16 19:36:54,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (1/1) ... [2024-11-16 19:36:54,465 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (1/1) ... [2024-11-16 19:36:54,466 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (1/1) ... [2024-11-16 19:36:54,471 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:36:54,473 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:36:54,476 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:36:54,476 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:36:54,477 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (1/1) ... [2024-11-16 19:36:54,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:36:54,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:36:54,506 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) [2024-11-16 19:36:54,508 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 [2024-11-16 19:36:54,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:36:54,549 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-16 19:36:54,549 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-16 19:36:54,549 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-16 19:36:54,549 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-16 19:36:54,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:36:54,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:36:54,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:36:54,551 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:36:54,675 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:36:54,678 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:36:54,902 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:36:54,902 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:36:54,983 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:36:54,983 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:36:54,983 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:36:54 BoogieIcfgContainer [2024-11-16 19:36:54,983 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:36:54,985 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:36:54,985 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:36:54,987 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:36:54,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:36:53" (1/3) ... [2024-11-16 19:36:54,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779ab1d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:36:54, skipping insertion in model container [2024-11-16 19:36:54,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:36:54" (2/3) ... [2024-11-16 19:36:54,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779ab1d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:36:54, skipping insertion in model container [2024-11-16 19:36:54,988 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:36:54" (3/3) ... [2024-11-16 19:36:54,989 INFO L112 eAbstractionObserver]: Analyzing ICFG unwind1-nondet.i [2024-11-16 19:36:55,002 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:36:55,002 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:36:55,002 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:36:55,068 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:36:55,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 27 transitions, 68 flow [2024-11-16 19:36:55,128 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-11-16 19:36:55,129 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:36:55,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 25 events. 4/25 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-11-16 19:36:55,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 27 transitions, 68 flow [2024-11-16 19:36:55,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 23 transitions, 55 flow [2024-11-16 19:36:55,147 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:36:55,152 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;@241b795a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:36:55,153 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-16 19:36:55,160 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:36:55,160 INFO L124 PetriNetUnfolderBase]: 4/21 cut-off events. [2024-11-16 19:36:55,160 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-16 19:36:55,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:36:55,161 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:36:55,162 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:36:55,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:36:55,167 INFO L85 PathProgramCache]: Analyzing trace with hash -930391127, now seen corresponding path program 1 times [2024-11-16 19:36:55,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:36:55,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079006560] [2024-11-16 19:36:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:55,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:36:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:36:55,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:36:55,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079006560] [2024-11-16 19:36:55,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079006560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:36:55,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:36:55,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:36:55,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915092936] [2024-11-16 19:36:55,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:36:55,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:36:55,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:36:55,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:36:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:36:55,410 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-11-16 19:36:55,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 55 flow. Second operand has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 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) [2024-11-16 19:36:55,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:36:55,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-11-16 19:36:55,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:36:55,473 INFO L124 PetriNetUnfolderBase]: 108/228 cut-off events. [2024-11-16 19:36:55,473 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-16 19:36:55,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 228 events. 108/228 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 845 event pairs, 83 based on Foata normal form. 26/235 useless extension candidates. Maximal degree in co-relation 402. Up to 187 conditions per place. [2024-11-16 19:36:55,477 INFO L140 encePairwiseOnDemand]: 25/27 looper letters, 16 selfloop transitions, 0 changer transitions 1/21 dead transitions. [2024-11-16 19:36:55,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 85 flow [2024-11-16 19:36:55,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:36:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:36:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 31 transitions. [2024-11-16 19:36:55,490 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-11-16 19:36:55,492 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 55 flow. Second operand 2 states and 31 transitions. [2024-11-16 19:36:55,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 85 flow [2024-11-16 19:36:55,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 80 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-16 19:36:55,497 INFO L231 Difference]: Finished difference. Result has 24 places, 20 transitions, 44 flow [2024-11-16 19:36:55,502 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=44, PETRI_PLACES=24, PETRI_TRANSITIONS=20} [2024-11-16 19:36:55,505 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, -2 predicate places. [2024-11-16 19:36:55,508 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 20 transitions, 44 flow [2024-11-16 19:36:55,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 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) [2024-11-16 19:36:55,508 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:36:55,508 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:36:55,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:36:55,509 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:36:55,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:36:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1221661225, now seen corresponding path program 1 times [2024-11-16 19:36:55,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:36:55,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605607922] [2024-11-16 19:36:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:55,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:36:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:36:55,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:36:55,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605607922] [2024-11-16 19:36:55,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605607922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:36:55,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:36:55,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 19:36:55,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542344753] [2024-11-16 19:36:55,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:36:55,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:36:55,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:36:55,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:36:55,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:36:55,770 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 27 [2024-11-16 19:36:55,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 44 flow. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2024-11-16 19:36:55,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:36:55,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 27 [2024-11-16 19:36:55,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:36:55,987 INFO L124 PetriNetUnfolderBase]: 165/341 cut-off events. [2024-11-16 19:36:55,990 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-16 19:36:55,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 639 conditions, 341 events. 165/341 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1378 event pairs, 66 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 636. Up to 154 conditions per place. [2024-11-16 19:36:55,996 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 22 selfloop transitions, 3 changer transitions 19/47 dead transitions. [2024-11-16 19:36:55,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 47 transitions, 189 flow [2024-11-16 19:36:55,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:36:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:36:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 75 transitions. [2024-11-16 19:36:56,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-11-16 19:36:56,000 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 44 flow. Second operand 6 states and 75 transitions. [2024-11-16 19:36:56,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 47 transitions, 189 flow [2024-11-16 19:36:56,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 189 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:36:56,005 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 58 flow [2024-11-16 19:36:56,005 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=58, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2024-11-16 19:36:56,006 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 4 predicate places. [2024-11-16 19:36:56,006 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 58 flow [2024-11-16 19:36:56,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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) [2024-11-16 19:36:56,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:36:56,007 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:36:56,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:36:56,008 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:36:56,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:36:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1515183078, now seen corresponding path program 1 times [2024-11-16 19:36:56,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:36:56,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90377575] [2024-11-16 19:36:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:56,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:36:56,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:36:56,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:36:56,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90377575] [2024-11-16 19:36:56,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90377575] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:36:56,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:36:56,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:36:56,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439286926] [2024-11-16 19:36:56,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:36:56,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:36:56,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:36:56,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:36:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:36:56,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 27 [2024-11-16 19:36:56,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2024-11-16 19:36:56,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:36:56,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 27 [2024-11-16 19:36:56,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:36:56,316 INFO L124 PetriNetUnfolderBase]: 58/154 cut-off events. [2024-11-16 19:36:56,316 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2024-11-16 19:36:56,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329 conditions, 154 events. 58/154 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 530 event pairs, 21 based on Foata normal form. 13/160 useless extension candidates. Maximal degree in co-relation 323. Up to 65 conditions per place. [2024-11-16 19:36:56,318 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 17 selfloop transitions, 3 changer transitions 10/33 dead transitions. [2024-11-16 19:36:56,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 150 flow [2024-11-16 19:36:56,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:36:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:36:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-11-16 19:36:56,321 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2024-11-16 19:36:56,322 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 58 flow. Second operand 5 states and 61 transitions. [2024-11-16 19:36:56,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 150 flow [2024-11-16 19:36:56,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 143 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-16 19:36:56,324 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 67 flow [2024-11-16 19:36:56,324 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=67, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2024-11-16 19:36:56,325 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2024-11-16 19:36:56,325 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 67 flow [2024-11-16 19:36:56,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2024-11-16 19:36:56,325 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:36:56,325 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:36:56,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:36:56,326 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:36:56,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:36:56,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1187752464, now seen corresponding path program 1 times [2024-11-16 19:36:56,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:36:56,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847213315] [2024-11-16 19:36:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:56,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:36:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:36:56,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:36:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847213315] [2024-11-16 19:36:56,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847213315] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:36:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963232946] [2024-11-16 19:36:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:56,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:56,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:36:56,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:36:56,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:36:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:36:56,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-16 19:36:56,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:36:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:36:56,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:36:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:36:56,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963232946] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:36:56,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:36:56,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2024-11-16 19:36:56,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880103118] [2024-11-16 19:36:56,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:36:56,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-16 19:36:56,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:36:56,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-16 19:36:56,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-16 19:36:56,721 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-16 19:36:56,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 67 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 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) [2024-11-16 19:36:56,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:36:56,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-16 19:36:56,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:36:56,898 INFO L124 PetriNetUnfolderBase]: 86/199 cut-off events. [2024-11-16 19:36:56,899 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2024-11-16 19:36:56,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 199 events. 86/199 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 684 event pairs, 33 based on Foata normal form. 5/200 useless extension candidates. Maximal degree in co-relation 479. Up to 81 conditions per place. [2024-11-16 19:36:56,904 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 17 selfloop transitions, 2 changer transitions 19/40 dead transitions. [2024-11-16 19:36:56,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 40 transitions, 203 flow [2024-11-16 19:36:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:36:56,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:36:56,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2024-11-16 19:36:56,907 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38271604938271603 [2024-11-16 19:36:56,907 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 67 flow. Second operand 6 states and 62 transitions. [2024-11-16 19:36:56,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 40 transitions, 203 flow [2024-11-16 19:36:56,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 40 transitions, 189 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-16 19:36:56,912 INFO L231 Difference]: Finished difference. Result has 34 places, 18 transitions, 66 flow [2024-11-16 19:36:56,912 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=66, PETRI_PLACES=34, PETRI_TRANSITIONS=18} [2024-11-16 19:36:56,913 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2024-11-16 19:36:56,914 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 18 transitions, 66 flow [2024-11-16 19:36:56,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 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) [2024-11-16 19:36:56,914 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:36:56,914 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:36:56,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:36:57,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:36:57,116 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-16 19:36:57,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:36:57,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1878313938, now seen corresponding path program 1 times [2024-11-16 19:36:57,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:36:57,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646970133] [2024-11-16 19:36:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:36:57,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:36:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:36:57,139 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-16 19:36:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-16 19:36:57,174 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-16 19:36:57,175 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-16 19:36:57,176 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2024-11-16 19:36:57,178 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2024-11-16 19:36:57,178 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-11-16 19:36:57,179 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-16 19:36:57,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:36:57,179 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2024-11-16 19:36:57,221 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-16 19:36:57,222 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-16 19:36:57,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 07:36:57 BasicIcfg [2024-11-16 19:36:57,228 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-16 19:36:57,229 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-16 19:36:57,229 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-16 19:36:57,229 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-16 19:36:57,230 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:36:54" (3/4) ... [2024-11-16 19:36:57,232 INFO L137 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-16 19:36:57,290 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-16 19:36:57,291 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-16 19:36:57,291 INFO L158 Benchmark]: Toolchain (without parser) took 3429.98ms. Allocated memory was 159.4MB in the beginning and 222.3MB in the end (delta: 62.9MB). Free memory was 101.6MB in the beginning and 123.3MB in the end (delta: -21.6MB). Peak memory consumption was 42.1MB. Max. memory is 16.1GB. [2024-11-16 19:36:57,292 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 119.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-16 19:36:57,292 INFO L158 Benchmark]: CACSL2BoogieTranslator took 532.96ms. Allocated memory is still 159.4MB. Free memory was 101.6MB in the beginning and 78.5MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-11-16 19:36:57,296 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.73ms. Allocated memory is still 159.4MB. Free memory was 78.5MB in the beginning and 76.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 19:36:57,297 INFO L158 Benchmark]: Boogie Preprocessor took 34.81ms. Allocated memory is still 159.4MB. Free memory was 76.5MB in the beginning and 74.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 19:36:57,297 INFO L158 Benchmark]: IcfgBuilder took 510.83ms. Allocated memory is still 159.4MB. Free memory was 74.4MB in the beginning and 115.6MB in the end (delta: -41.2MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. [2024-11-16 19:36:57,297 INFO L158 Benchmark]: TraceAbstraction took 2243.68ms. Allocated memory was 159.4MB in the beginning and 222.3MB in the end (delta: 62.9MB). Free memory was 114.8MB in the beginning and 126.4MB in the end (delta: -11.6MB). Peak memory consumption was 54.0MB. Max. memory is 16.1GB. [2024-11-16 19:36:57,298 INFO L158 Benchmark]: Witness Printer took 61.53ms. Allocated memory is still 222.3MB. Free memory was 126.4MB in the beginning and 123.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-16 19:36:57,299 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 119.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 532.96ms. Allocated memory is still 159.4MB. Free memory was 101.6MB in the beginning and 78.5MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.73ms. Allocated memory is still 159.4MB. Free memory was 78.5MB in the beginning and 76.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.81ms. Allocated memory is still 159.4MB. Free memory was 76.5MB in the beginning and 74.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * IcfgBuilder took 510.83ms. Allocated memory is still 159.4MB. Free memory was 74.4MB in the beginning and 115.6MB in the end (delta: -41.2MB). Peak memory consumption was 11.2MB. Max. memory is 16.1GB. * TraceAbstraction took 2243.68ms. Allocated memory was 159.4MB in the beginning and 222.3MB in the end (delta: 62.9MB). Free memory was 114.8MB in the beginning and 126.4MB in the end (delta: -11.6MB). Peak memory consumption was 54.0MB. Max. memory is 16.1GB. * Witness Printer took 61.53ms. Allocated memory is still 222.3MB. Free memory was 126.4MB in the beginning and 123.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 753]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L754] 0 int _N; [L755] 0 atomic_int limit; [L772] 0 _N = __VERIFIER_nondet_int() [L773] CALL 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L750] COND FALSE 0 !(!cond) [L773] RET 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L774] 0 pthread_t t1, t2; [L775] FCALL, FORK 0 pthread_create(&t1, 0, f1, 0) VAL [\old(arg)={0:0}, _N=0, limit=0, t1=-1] [L757] COND FALSE 1 !(__VERIFIER_nondet_int()) [L776] FCALL, FORK 0 pthread_create(&t2, 0, f2, 0) VAL [\old(arg)={0:0}, _N=0, arg={0:0}, limit=0, t1=-1, t2=0] [L760] 1 limit = _N + 1 VAL [\old(arg)={0:0}, _N=0, arg={0:0}, limit=1] [L765] 2 int i, bound; [L766] 2 bound = limit [L767] 2 i = 0 VAL [\old(arg)={0:0}, \old(arg)={0:0}, _N=0, arg={0:0}, arg={0:0}, bound=1, i=0, limit=1] [L767] COND TRUE 2 i < bound [L767] 2 i++ VAL [\old(arg)={0:0}, \old(arg)={0:0}, _N=0, arg={0:0}, arg={0:0}, bound=1, i=1, limit=1] [L767] COND FALSE 2 !(i < bound) VAL [\old(arg)={0:0}, \old(arg)={0:0}, _N=0, arg={0:0}, arg={0:0}, bound=1, i=1, limit=1] [L768] CALL 2 __VERIFIER_assert(i <= _N) [L753] COND TRUE 2 !expression VAL [\old(arg)={0:0}, \old(expression)=0, _N=0, arg={0:0}, expression=0, limit=1] [L753] 2 reach_error() VAL [\old(arg)={0:0}, \old(expression)=0, _N=0, arg={0:0}, expression=0, limit=1] - UnprovableResult [Line: 776]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 775]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 4 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: 2.1s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 91 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 86 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 12 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 293 IncrementalHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 0 mSDtfsCounter, 293 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=3, InterpolantAutomatonStates: 19, 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, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 156 SizeOfPredicates, 6 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 2/8 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 RESULT: Ultimate proved your program to be incorrect! [2024-11-16 19:36:57,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE