./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-theta/unwind2-nondet.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3061b6dc 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/unwind2-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 797a9e1bf9dc9387a2e0877719131f75c1f5b0797aa4bcc7c94038568bc56c2d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:57:53,733 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:57:53,830 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:57:53,837 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:57:53,837 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:57:53,876 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:57:53,879 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:57:53,879 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:57:53,880 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:57:53,881 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:57:53,881 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:57:53,885 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:57:53,886 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:57:53,886 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:57:53,886 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:57:53,886 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:57:53,887 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:57:53,887 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:57:53,887 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:57:53,887 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:57:53,888 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:57:53,891 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:57:53,894 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:57:53,894 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:57:53,895 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:57:53,895 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:57:53,895 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:57:53,895 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:57:53,895 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:57:53,896 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:57:53,896 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:57:53,896 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:57:53,896 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:57:53,897 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:57:53,897 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:57:53,897 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:57:53,903 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:57:53,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:57:53,904 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:57:53,904 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:57:53,904 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:57:53,904 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:57:53,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 797a9e1bf9dc9387a2e0877719131f75c1f5b0797aa4bcc7c94038568bc56c2d [2024-11-19 01:57:54,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:57:54,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:57:54,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:57:54,293 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:57:54,294 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:57:54,296 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/unwind2-nondet.i [2024-11-19 01:57:56,095 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:57:56,526 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:57:56,531 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind2-nondet.i [2024-11-19 01:57:56,558 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8df964371/bbf69f23a4044634a3b3c74ff2947629/FLAG63b14a982 [2024-11-19 01:57:56,706 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8df964371/bbf69f23a4044634a3b3c74ff2947629 [2024-11-19 01:57:56,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:57:56,709 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:57:56,712 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:57:56,712 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:57:56,717 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:57:56,717 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:57:56" (1/1) ... [2024-11-19 01:57:56,719 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31f02534 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:56, skipping insertion in model container [2024-11-19 01:57:56,720 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:57:56" (1/1) ... [2024-11-19 01:57:56,774 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:57:57,172 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/unwind2-nondet.i[33026,33039] [2024-11-19 01:57:57,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:57:57,197 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:57:57,235 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/unwind2-nondet.i[33026,33039] [2024-11-19 01:57:57,248 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:57:57,283 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:57:57,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57 WrapperNode [2024-11-19 01:57:57,284 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:57:57,284 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:57:57,285 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:57:57,285 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:57:57,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (1/1) ... [2024-11-19 01:57:57,303 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (1/1) ... [2024-11-19 01:57:57,319 INFO L138 Inliner]: procedures = 169, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 84 [2024-11-19 01:57:57,319 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:57:57,320 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:57:57,320 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:57:57,320 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:57:57,329 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (1/1) ... [2024-11-19 01:57:57,329 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (1/1) ... [2024-11-19 01:57:57,332 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (1/1) ... [2024-11-19 01:57:57,344 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]. [2024-11-19 01:57:57,345 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (1/1) ... [2024-11-19 01:57:57,345 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (1/1) ... [2024-11-19 01:57:57,348 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (1/1) ... [2024-11-19 01:57:57,350 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (1/1) ... [2024-11-19 01:57:57,352 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (1/1) ... [2024-11-19 01:57:57,353 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (1/1) ... [2024-11-19 01:57:57,354 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:57:57,355 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:57:57,355 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:57:57,355 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:57:57,356 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (1/1) ... [2024-11-19 01:57:57,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:57:57,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:57,400 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) [2024-11-19 01:57:57,409 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 [2024-11-19 01:57:57,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:57:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-19 01:57:57,474 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-19 01:57:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-19 01:57:57,474 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-19 01:57:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:57:57,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:57:57,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:57:57,476 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:57:57,622 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:57:57,624 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:57:57,853 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:57:57,853 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:57:58,060 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:57:58,063 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-19 01:57:58,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:57:58 BoogieIcfgContainer [2024-11-19 01:57:58,065 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:57:58,067 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:57:58,067 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:57:58,070 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:57:58,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:57:56" (1/3) ... [2024-11-19 01:57:58,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff549fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:57:58, skipping insertion in model container [2024-11-19 01:57:58,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:57" (2/3) ... [2024-11-19 01:57:58,077 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff549fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:57:58, skipping insertion in model container [2024-11-19 01:57:58,077 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:57:58" (3/3) ... [2024-11-19 01:57:58,079 INFO L112 eAbstractionObserver]: Analyzing ICFG unwind2-nondet.i [2024-11-19 01:57:58,110 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:57:58,110 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-19 01:57:58,110 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:57:58,189 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 01:57:58,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 30 transitions, 74 flow [2024-11-19 01:57:58,265 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2024-11-19 01:57:58,265 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:57:58,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 28 events. 4/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-11-19 01:57:58,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 30 transitions, 74 flow [2024-11-19 01:57:58,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 26 transitions, 61 flow [2024-11-19 01:57:58,294 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:57:58,300 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;@3ca13986, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:57:58,301 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-19 01:57:58,313 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:57:58,317 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-11-19 01:57:58,317 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:57:58,318 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:58,320 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:58,321 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-19 01:57:58,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:58,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1153795071, now seen corresponding path program 1 times [2024-11-19 01:57:58,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:58,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915065537] [2024-11-19 01:57:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:58,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:58,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:58,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915065537] [2024-11-19 01:57:58,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915065537] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:57:58,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:57:58,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 01:57:58,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038905566] [2024-11-19 01:57:58,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:57:58,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:57:58,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:57:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:57:59,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-11-19 01:57:59,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 61 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-11-19 01:57:59,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:59,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-11-19 01:57:59,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:59,626 INFO L124 PetriNetUnfolderBase]: 381/717 cut-off events. [2024-11-19 01:57:59,627 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-11-19 01:57:59,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1417 conditions, 717 events. 381/717 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3571 event pairs, 32 based on Foata normal form. 70/658 useless extension candidates. Maximal degree in co-relation 1304. Up to 185 conditions per place. [2024-11-19 01:57:59,642 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 75 selfloop transitions, 18 changer transitions 4/101 dead transitions. [2024-11-19 01:57:59,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 101 transitions, 429 flow [2024-11-19 01:57:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 01:57:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 01:57:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-11-19 01:57:59,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-19 01:57:59,671 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 61 flow. Second operand 11 states and 176 transitions. [2024-11-19 01:57:59,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 101 transitions, 429 flow [2024-11-19 01:57:59,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 101 transitions, 413 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 01:57:59,685 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 167 flow [2024-11-19 01:57:59,687 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=167, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-11-19 01:57:59,694 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2024-11-19 01:57:59,694 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 167 flow [2024-11-19 01:57:59,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 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) [2024-11-19 01:57:59,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:59,695 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:59,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:57:59,695 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-19 01:57:59,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:59,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1407939420, now seen corresponding path program 1 times [2024-11-19 01:57:59,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:59,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297040917] [2024-11-19 01:57:59,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:59,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:59,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:59,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297040917] [2024-11-19 01:57:59,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297040917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:57:59,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506258624] [2024-11-19 01:57:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:59,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:59,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:59,836 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) [2024-11-19 01:57:59,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:57:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:59,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:57:59,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:59,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:59,998 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:57:59,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506258624] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:57:59,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 01:57:59,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2024-11-19 01:57:59,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486121091] [2024-11-19 01:57:59,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:00,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 01:58:00,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:00,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 01:58:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-19 01:58:00,017 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 30 [2024-11-19 01:58:00,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 167 flow. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 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) [2024-11-19 01:58:00,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:00,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 30 [2024-11-19 01:58:00,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:00,243 INFO L124 PetriNetUnfolderBase]: 345/702 cut-off events. [2024-11-19 01:58:00,243 INFO L125 PetriNetUnfolderBase]: For 318/318 co-relation queries the response was YES. [2024-11-19 01:58:00,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1811 conditions, 702 events. 345/702 cut-off events. For 318/318 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3711 event pairs, 68 based on Foata normal form. 22/623 useless extension candidates. Maximal degree in co-relation 1636. Up to 167 conditions per place. [2024-11-19 01:58:00,251 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 72 selfloop transitions, 14 changer transitions 4/97 dead transitions. [2024-11-19 01:58:00,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 97 transitions, 502 flow [2024-11-19 01:58:00,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 01:58:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 01:58:00,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-11-19 01:58:00,254 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2024-11-19 01:58:00,254 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 167 flow. Second operand 9 states and 152 transitions. [2024-11-19 01:58:00,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 97 transitions, 502 flow [2024-11-19 01:58:00,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 97 transitions, 501 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:58:00,264 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 239 flow [2024-11-19 01:58:00,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=239, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-11-19 01:58:00,265 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2024-11-19 01:58:00,265 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 239 flow [2024-11-19 01:58:00,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 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) [2024-11-19 01:58:00,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:00,266 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:00,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 01:58:00,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:58:00,467 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-19 01:58:00,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:00,467 INFO L85 PathProgramCache]: Analyzing trace with hash 142621241, now seen corresponding path program 1 times [2024-11-19 01:58:00,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:00,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649193365] [2024-11-19 01:58:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:00,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:58:00,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:00,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649193365] [2024-11-19 01:58:00,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649193365] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:58:00,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:58:00,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 01:58:00,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794947445] [2024-11-19 01:58:00,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:00,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 01:58:00,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:00,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 01:58:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 01:58:00,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-19 01:58:00,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 239 flow. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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) [2024-11-19 01:58:00,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:00,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-19 01:58:00,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:00,701 INFO L124 PetriNetUnfolderBase]: 396/836 cut-off events. [2024-11-19 01:58:00,701 INFO L125 PetriNetUnfolderBase]: For 946/948 co-relation queries the response was YES. [2024-11-19 01:58:00,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2275 conditions, 836 events. 396/836 cut-off events. For 946/948 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4700 event pairs, 87 based on Foata normal form. 2/753 useless extension candidates. Maximal degree in co-relation 2090. Up to 290 conditions per place. [2024-11-19 01:58:00,705 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 64 selfloop transitions, 15 changer transitions 1/88 dead transitions. [2024-11-19 01:58:00,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 88 transitions, 640 flow [2024-11-19 01:58:00,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 01:58:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 01:58:00,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-11-19 01:58:00,707 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-19 01:58:00,707 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 239 flow. Second operand 7 states and 112 transitions. [2024-11-19 01:58:00,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 88 transitions, 640 flow [2024-11-19 01:58:00,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 628 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:58:00,713 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 314 flow [2024-11-19 01:58:00,714 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-11-19 01:58:00,714 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 29 predicate places. [2024-11-19 01:58:00,714 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 314 flow [2024-11-19 01:58:00,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 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) [2024-11-19 01:58:00,714 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:00,714 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:00,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 01:58:00,715 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-19 01:58:00,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:00,715 INFO L85 PathProgramCache]: Analyzing trace with hash 126260598, now seen corresponding path program 1 times [2024-11-19 01:58:00,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:00,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135373372] [2024-11-19 01:58:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:00,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:58:00,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:00,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135373372] [2024-11-19 01:58:00,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135373372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:58:00,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795967983] [2024-11-19 01:58:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:00,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:58:00,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:58:00,878 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:58:00,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:58:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:00,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:58:00,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:58:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:58:01,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:58:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:58:01,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795967983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:58:01,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:58:01,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-19 01:58:01,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227593049] [2024-11-19 01:58:01,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:58:01,228 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-19 01:58:01,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:01,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-19 01:58:01,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-19 01:58:01,242 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-11-19 01:58:01,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 314 flow. Second operand has 15 states, 15 states have (on average 7.533333333333333) internal successors, (113), 15 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:01,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:01,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-11-19 01:58:01,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:01,777 INFO L124 PetriNetUnfolderBase]: 774/1416 cut-off events. [2024-11-19 01:58:01,777 INFO L125 PetriNetUnfolderBase]: For 2064/2080 co-relation queries the response was YES. [2024-11-19 01:58:01,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4643 conditions, 1416 events. 774/1416 cut-off events. For 2064/2080 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7879 event pairs, 99 based on Foata normal form. 2/1281 useless extension candidates. Maximal degree in co-relation 4326. Up to 357 conditions per place. [2024-11-19 01:58:01,794 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 99 selfloop transitions, 22 changer transitions 37/164 dead transitions. [2024-11-19 01:58:01,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 164 transitions, 1300 flow [2024-11-19 01:58:01,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 01:58:01,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 01:58:01,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 188 transitions. [2024-11-19 01:58:01,799 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48205128205128206 [2024-11-19 01:58:01,799 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 314 flow. Second operand 13 states and 188 transitions. [2024-11-19 01:58:01,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 164 transitions, 1300 flow [2024-11-19 01:58:01,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 164 transitions, 1279 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 01:58:01,827 INFO L231 Difference]: Finished difference. Result has 73 places, 55 transitions, 422 flow [2024-11-19 01:58:01,827 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=422, PETRI_PLACES=73, PETRI_TRANSITIONS=55} [2024-11-19 01:58:01,828 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2024-11-19 01:58:01,828 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 55 transitions, 422 flow [2024-11-19 01:58:01,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.533333333333333) internal successors, (113), 15 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:58:01,828 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:01,828 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:01,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 01:58:02,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-19 01:58:02,031 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting f1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-19 01:58:02,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:02,035 INFO L85 PathProgramCache]: Analyzing trace with hash -921986964, now seen corresponding path program 1 times [2024-11-19 01:58:02,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:02,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487391081] [2024-11-19 01:58:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:02,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:58:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:58:02,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:58:02,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487391081] [2024-11-19 01:58:02,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487391081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:58:02,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:58:02,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 01:58:02,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708337897] [2024-11-19 01:58:02,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:58:02,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 01:58:02,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:58:02,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 01:58:02,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-19 01:58:02,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2024-11-19 01:58:02,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 55 transitions, 422 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2024-11-19 01:58:02,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:58:02,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2024-11-19 01:58:02,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:58:02,448 INFO L124 PetriNetUnfolderBase]: 552/1173 cut-off events. [2024-11-19 01:58:02,451 INFO L125 PetriNetUnfolderBase]: For 2539/2541 co-relation queries the response was YES. [2024-11-19 01:58:02,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4530 conditions, 1173 events. 552/1173 cut-off events. For 2539/2541 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7170 event pairs, 101 based on Foata normal form. 18/1142 useless extension candidates. Maximal degree in co-relation 4357. Up to 558 conditions per place. [2024-11-19 01:58:02,467 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 58 selfloop transitions, 15 changer transitions 0/82 dead transitions. [2024-11-19 01:58:02,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 82 transitions, 750 flow [2024-11-19 01:58:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:58:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:58:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-11-19 01:58:02,468 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-11-19 01:58:02,468 INFO L175 Difference]: Start difference. First operand has 73 places, 55 transitions, 422 flow. Second operand 6 states and 92 transitions. [2024-11-19 01:58:02,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 82 transitions, 750 flow [2024-11-19 01:58:02,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 693 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-11-19 01:58:02,498 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 419 flow [2024-11-19 01:58:02,499 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=419, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2024-11-19 01:58:02,499 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2024-11-19 01:58:02,500 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 419 flow [2024-11-19 01:58:02,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 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) [2024-11-19 01:58:02,501 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:58:02,501 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:58:02,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 01:58:02,501 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-11-19 01:58:02,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:58:02,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1504686646, now seen corresponding path program 1 times [2024-11-19 01:58:02,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:58:02,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631576981] [2024-11-19 01:58:02,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:58:02,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:58:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:02,519 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:58:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:58:02,560 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:58:02,561 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:58:02,562 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2024-11-19 01:58:02,566 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 6 remaining) [2024-11-19 01:58:02,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2024-11-19 01:58:02,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-11-19 01:58:02,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-11-19 01:58:02,567 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-11-19 01:58:02,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 01:58:02,567 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-19 01:58:02,607 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-19 01:58:02,607 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-19 01:58:02,611 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 01:58:02 BasicIcfg [2024-11-19 01:58:02,612 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-19 01:58:02,612 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-19 01:58:02,612 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-19 01:58:02,612 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-19 01:58:02,613 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:57:58" (3/4) ... [2024-11-19 01:58:02,613 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-19 01:58:02,663 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-19 01:58:02,663 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-19 01:58:02,664 INFO L158 Benchmark]: Toolchain (without parser) took 5955.44ms. Allocated memory was 205.5MB in the beginning and 306.2MB in the end (delta: 100.7MB). Free memory was 135.1MB in the beginning and 232.1MB in the end (delta: -97.0MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2024-11-19 01:58:02,666 INFO L158 Benchmark]: CDTParser took 0.60ms. Allocated memory is still 205.5MB. Free memory is still 163.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-19 01:58:02,666 INFO L158 Benchmark]: CACSL2BoogieTranslator took 571.93ms. Allocated memory is still 205.5MB. Free memory was 134.8MB in the beginning and 112.1MB in the end (delta: 22.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-11-19 01:58:02,667 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.73ms. Allocated memory is still 205.5MB. Free memory was 112.1MB in the beginning and 110.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-19 01:58:02,667 INFO L158 Benchmark]: Boogie Preprocessor took 34.70ms. Allocated memory is still 205.5MB. Free memory was 110.3MB in the beginning and 107.9MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-19 01:58:02,667 INFO L158 Benchmark]: RCFGBuilder took 710.19ms. Allocated memory is still 205.5MB. Free memory was 107.9MB in the beginning and 168.0MB in the end (delta: -60.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-11-19 01:58:02,667 INFO L158 Benchmark]: TraceAbstraction took 4544.65ms. Allocated memory was 205.5MB in the beginning and 306.2MB in the end (delta: 100.7MB). Free memory was 167.0MB in the beginning and 235.3MB in the end (delta: -68.3MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. [2024-11-19 01:58:02,668 INFO L158 Benchmark]: Witness Printer took 51.44ms. Allocated memory is still 306.2MB. Free memory was 235.3MB in the beginning and 232.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-19 01:58:02,669 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60ms. Allocated memory is still 205.5MB. Free memory is still 163.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 571.93ms. Allocated memory is still 205.5MB. Free memory was 134.8MB in the beginning and 112.1MB in the end (delta: 22.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.73ms. Allocated memory is still 205.5MB. Free memory was 112.1MB in the beginning and 110.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.70ms. Allocated memory is still 205.5MB. Free memory was 110.3MB in the beginning and 107.9MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 710.19ms. Allocated memory is still 205.5MB. Free memory was 107.9MB in the beginning and 168.0MB in the end (delta: -60.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 4544.65ms. Allocated memory was 205.5MB in the beginning and 306.2MB in the end (delta: 100.7MB). Free memory was 167.0MB in the beginning and 235.3MB in the end (delta: -68.3MB). Peak memory consumption was 35.5MB. Max. memory is 16.1GB. * Witness Printer took 51.44ms. Allocated memory is still 306.2MB. Free memory was 235.3MB in the beginning and 232.1MB 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; [L775] 0 _N = __VERIFIER_nondet_int() [L776] CALL 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L750] COND FALSE 0 !(!cond) [L776] RET 0 assume_abort_if_not(0 <= _N && _N <= 0x7fffffff - 1) [L777] 0 pthread_t t1, t2; [L778] FCALL, FORK 0 pthread_create(&t1, 0, f1, 0) VAL [_N=0, limit=0, t1=-1] [L757] 1 int i, bound; [L758] 1 int lim = _N; VAL [\old(arg)={0:0}, _N=0, arg={0:0}, lim=0, limit=0] [L779] FCALL, FORK 0 pthread_create(&t2, 0, f2, 0) VAL [_N=0, limit=0, t1=-1, t2=0] [L766] 2 int i, bound; [L767] 2 int lim = _N + 1; VAL [\old(arg)={0:0}, _N=0, arg={0:0}, lim=1, limit=0] [L768] 2 limit = lim VAL [\old(arg)={0:0}, _N=0, arg={0:0}, lim=1, limit=1] [L759] 1 limit = lim VAL [\old(arg)={0:0}, _N=0, arg={0:0}, lim=0, limit=0] [L769] 2 bound = limit [L770] 2 i = 0 VAL [\old(arg)={0:0}, _N=0, arg={0:0}, bound=0, i=0, lim=1, limit=0] [L770] COND FALSE 2 !(i < bound) [L771] CALL 2 __VERIFIER_assert(i == lim) [L753] COND TRUE 2 !expression VAL [\old(expression)=0, _N=0, expression=0, limit=0] [L753] 2 reach_error() VAL [\old(expression)=0, _N=0, expression=0, limit=0] - UnprovableResult [Line: 778]: 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: 779]: 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: 753]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 47 locations, 6 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: 4.3s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 492 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 484 mSDsluCounter, 144 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 120 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 967 IncrementalHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 24 mSDtfsCounter, 967 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=422occurred in iteration=4, InterpolantAutomatonStates: 46, 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, 1.3s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 320 SizeOfPredicates, 11 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 1/5 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! [2024-11-19 01:58:02,699 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