./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 c7c6ca5d 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-?-c7c6ca5-m [2024-11-09 02:53:34,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 02:53:34,351 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-09 02:53:34,359 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 02:53:34,360 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 02:53:34,378 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 02:53:34,379 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 02:53:34,379 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 02:53:34,379 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 02:53:34,380 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 02:53:34,380 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 02:53:34,380 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 02:53:34,381 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 02:53:34,381 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 02:53:34,381 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 02:53:34,382 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 02:53:34,385 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 02:53:34,385 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 02:53:34,386 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 02:53:34,386 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 02:53:34,386 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 02:53:34,387 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 02:53:34,387 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 02:53:34,387 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 02:53:34,387 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 02:53:34,387 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 02:53:34,388 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 02:53:34,388 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 02:53:34,388 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 02:53:34,388 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 02:53:34,388 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 02:53:34,389 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 02:53:34,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:53:34,389 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 02:53:34,389 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 02:53:34,390 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 02:53:34,390 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 02:53:34,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 02:53:34,394 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 02:53:34,395 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 02:53:34,395 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 02:53:34,395 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 02:53:34,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 591990a0070f9287f734f2988edce5e1b5a43791c74b5c6b7374ff93ddaa2267 [2024-11-09 02:53:34,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 02:53:34,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 02:53:34,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 02:53:34,662 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 02:53:34,663 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 02:53:34,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/unwind1-nondet.i [2024-11-09 02:53:36,026 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 02:53:36,233 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 02:53:36,234 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/unwind1-nondet.i [2024-11-09 02:53:36,255 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e95fcbb3e/4ca934ac3c01418d832e762a17d34307/FLAG94c47d9a3 [2024-11-09 02:53:36,268 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e95fcbb3e/4ca934ac3c01418d832e762a17d34307 [2024-11-09 02:53:36,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 02:53:36,272 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 02:53:36,273 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 02:53:36,274 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 02:53:36,278 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 02:53:36,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,280 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4867b3d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36, skipping insertion in model container [2024-11-09 02:53:36,281 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,322 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 02:53:36,613 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] [2024-11-09 02:53:36,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:53:36,642 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 02:53:36,677 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] [2024-11-09 02:53:36,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 02:53:36,715 INFO L204 MainTranslator]: Completed translation [2024-11-09 02:53:36,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36 WrapperNode [2024-11-09 02:53:36,716 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 02:53:36,717 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 02:53:36,717 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 02:53:36,717 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 02:53:36,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,735 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,753 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2024-11-09 02:53:36,754 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 02:53:36,754 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 02:53:36,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 02:53:36,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 02:53:36,763 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,765 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,781 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]. [2024-11-09 02:53:36,781 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,784 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,788 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,791 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,796 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,797 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,799 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 02:53:36,800 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 02:53:36,800 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 02:53:36,800 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 02:53:36,801 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (1/1) ... [2024-11-09 02:53:36,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 02:53:36,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:53:36,831 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) [2024-11-09 02:53:36,833 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 [2024-11-09 02:53:36,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 02:53:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-09 02:53:36,868 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-09 02:53:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-09 02:53:36,868 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-09 02:53:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 02:53:36,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 02:53:36,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 02:53:36,870 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 02:53:36,969 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 02:53:36,971 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 02:53:37,070 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 02:53:37,070 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 02:53:37,208 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 02:53:37,209 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 02:53:37,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:53:37 BoogieIcfgContainer [2024-11-09 02:53:37,209 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 02:53:37,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 02:53:37,212 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 02:53:37,215 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 02:53:37,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 02:53:36" (1/3) ... [2024-11-09 02:53:37,216 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ff7120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:53:37, skipping insertion in model container [2024-11-09 02:53:37,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 02:53:36" (2/3) ... [2024-11-09 02:53:37,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ff7120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 02:53:37, skipping insertion in model container [2024-11-09 02:53:37,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:53:37" (3/3) ... [2024-11-09 02:53:37,219 INFO L112 eAbstractionObserver]: Analyzing ICFG unwind1-nondet.i [2024-11-09 02:53:37,237 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 02:53:37,237 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 02:53:37,237 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 02:53:37,281 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 02:53:37,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 62 flow [2024-11-09 02:53:37,331 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-11-09 02:53:37,331 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 02:53:37,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 22 events. 3/22 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 25 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-11-09 02:53:37,334 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 62 flow [2024-11-09 02:53:37,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 20 transitions, 49 flow [2024-11-09 02:53:37,346 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 02:53:37,351 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;@7013c3d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 02:53:37,351 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-09 02:53:37,361 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 02:53:37,366 INFO L124 PetriNetUnfolderBase]: 3/17 cut-off events. [2024-11-09 02:53:37,366 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 02:53:37,366 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:53:37,367 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:53:37,367 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-09 02:53:37,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:53:37,372 INFO L85 PathProgramCache]: Analyzing trace with hash 933352434, now seen corresponding path program 1 times [2024-11-09 02:53:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:53:37,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143821524] [2024-11-09 02:53:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:53:37,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:53:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:53:37,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:53:37,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:53:37,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143821524] [2024-11-09 02:53:37,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143821524] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:53:37,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:53:37,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 02:53:37,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532133563] [2024-11-09 02:53:37,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:53:37,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 02:53:37,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:53:37,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 02:53:37,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 02:53:37,772 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-09 02:53:37,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 20 transitions, 49 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) [2024-11-09 02:53:37,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:53:37,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-09 02:53:37,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:53:37,951 INFO L124 PetriNetUnfolderBase]: 151/284 cut-off events. [2024-11-09 02:53:37,952 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-09 02:53:37,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 580 conditions, 284 events. 151/284 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1131 event pairs, 68 based on Foata normal form. 11/239 useless extension candidates. Maximal degree in co-relation 520. Up to 145 conditions per place. [2024-11-09 02:53:37,957 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 25 selfloop transitions, 7 changer transitions 6/41 dead transitions. [2024-11-09 02:53:37,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 176 flow [2024-11-09 02:53:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 02:53:37,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 02:53:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-11-09 02:53:37,969 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-11-09 02:53:37,970 INFO L175 Difference]: Start difference. First operand has 24 places, 20 transitions, 49 flow. Second operand 6 states and 70 transitions. [2024-11-09 02:53:37,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 176 flow [2024-11-09 02:53:37,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 41 transitions, 165 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 02:53:37,975 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 83 flow [2024-11-09 02:53:37,977 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=83, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-11-09 02:53:37,982 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2024-11-09 02:53:37,983 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 83 flow [2024-11-09 02:53:37,983 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) [2024-11-09 02:53:37,983 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:53:37,983 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:53:37,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 02:53:37,983 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-09 02:53:37,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:53:37,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1130876244, now seen corresponding path program 1 times [2024-11-09 02:53:37,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:53:37,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139583395] [2024-11-09 02:53:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:53:37,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:53:37,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:53:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:53:38,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:53:38,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139583395] [2024-11-09 02:53:38,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139583395] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 02:53:38,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 02:53:38,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 02:53:38,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177416517] [2024-11-09 02:53:38,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 02:53:38,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 02:53:38,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:53:38,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 02:53:38,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 02:53:38,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-11-09 02:53:38,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 83 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2024-11-09 02:53:38,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:53:38,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-11-09 02:53:38,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:53:38,204 INFO L124 PetriNetUnfolderBase]: 106/228 cut-off events. [2024-11-09 02:53:38,204 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2024-11-09 02:53:38,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 228 events. 106/228 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 888 event pairs, 27 based on Foata normal form. 13/226 useless extension candidates. Maximal degree in co-relation 355. Up to 85 conditions per place. [2024-11-09 02:53:38,206 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 16 selfloop transitions, 3 changer transitions 18/40 dead transitions. [2024-11-09 02:53:38,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 212 flow [2024-11-09 02:53:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 02:53:38,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 02:53:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 60 transitions. [2024-11-09 02:53:38,210 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-09 02:53:38,211 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 83 flow. Second operand 5 states and 60 transitions. [2024-11-09 02:53:38,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 212 flow [2024-11-09 02:53:38,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 211 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 02:53:38,214 INFO L231 Difference]: Finished difference. Result has 35 places, 19 transitions, 76 flow [2024-11-09 02:53:38,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=19} [2024-11-09 02:53:38,215 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 11 predicate places. [2024-11-09 02:53:38,215 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 19 transitions, 76 flow [2024-11-09 02:53:38,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 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) [2024-11-09 02:53:38,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:53:38,216 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:53:38,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 02:53:38,216 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-09 02:53:38,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:53:38,217 INFO L85 PathProgramCache]: Analyzing trace with hash 468998787, now seen corresponding path program 1 times [2024-11-09 02:53:38,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:53:38,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105738151] [2024-11-09 02:53:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:53:38,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:53:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:53:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:53:38,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 02:53:38,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105738151] [2024-11-09 02:53:38,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105738151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 02:53:38,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697014214] [2024-11-09 02:53:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:53:38,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:53:38,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 02:53:38,362 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) [2024-11-09 02:53:38,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 02:53:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 02:53:38,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 02:53:38,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 02:53:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:53:38,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 02:53:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 02:53:38,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697014214] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 02:53:38,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 02:53:38,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2024-11-09 02:53:38,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441109495] [2024-11-09 02:53:38,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 02:53:38,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 02:53:38,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 02:53:38,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 02:53:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 02:53:38,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2024-11-09 02:53:38,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 19 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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) [2024-11-09 02:53:38,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 02:53:38,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2024-11-09 02:53:38,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 02:53:38,652 INFO L124 PetriNetUnfolderBase]: 76/161 cut-off events. [2024-11-09 02:53:38,652 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-09 02:53:38,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 161 events. 76/161 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 492 event pairs, 27 based on Foata normal form. 5/152 useless extension candidates. Maximal degree in co-relation 437. Up to 61 conditions per place. [2024-11-09 02:53:38,654 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 16 selfloop transitions, 2 changer transitions 22/41 dead transitions. [2024-11-09 02:53:38,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 41 transitions, 228 flow [2024-11-09 02:53:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 02:53:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 02:53:38,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 61 transitions. [2024-11-09 02:53:38,658 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3630952380952381 [2024-11-09 02:53:38,658 INFO L175 Difference]: Start difference. First operand has 35 places, 19 transitions, 76 flow. Second operand 7 states and 61 transitions. [2024-11-09 02:53:38,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 41 transitions, 228 flow [2024-11-09 02:53:38,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 41 transitions, 194 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-11-09 02:53:38,661 INFO L231 Difference]: Finished difference. Result has 34 places, 16 transitions, 60 flow [2024-11-09 02:53:38,664 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=60, PETRI_PLACES=34, PETRI_TRANSITIONS=16} [2024-11-09 02:53:38,665 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 10 predicate places. [2024-11-09 02:53:38,666 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 16 transitions, 60 flow [2024-11-09 02:53:38,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 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) [2024-11-09 02:53:38,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 02:53:38,667 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 02:53:38,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 02:53:38,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 02:53:38,869 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting f2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-09 02:53:38,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 02:53:38,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2054529023, now seen corresponding path program 1 times [2024-11-09 02:53:38,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 02:53:38,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852942514] [2024-11-09 02:53:38,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 02:53:38,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 02:53:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:53:38,886 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 02:53:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 02:53:38,916 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 02:53:38,916 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 02:53:38,917 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2024-11-09 02:53:38,920 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2024-11-09 02:53:38,920 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-11-09 02:53:38,920 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location f2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-11-09 02:53:38,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 02:53:38,921 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-09 02:53:38,946 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-09 02:53:38,946 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 02:53:38,953 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 02:53:38 BasicIcfg [2024-11-09 02:53:38,953 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 02:53:38,954 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 02:53:38,954 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 02:53:38,955 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 02:53:38,955 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 02:53:37" (3/4) ... [2024-11-09 02:53:38,956 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-09 02:53:39,001 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-11-09 02:53:39,001 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 02:53:39,001 INFO L158 Benchmark]: Toolchain (without parser) took 2729.07ms. Allocated memory was 169.9MB in the beginning and 241.2MB in the end (delta: 71.3MB). Free memory was 114.3MB in the beginning and 167.5MB in the end (delta: -53.2MB). Peak memory consumption was 19.6MB. Max. memory is 16.1GB. [2024-11-09 02:53:39,001 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 169.9MB. Free memory is still 133.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 02:53:39,002 INFO L158 Benchmark]: CACSL2BoogieTranslator took 442.53ms. Allocated memory is still 169.9MB. Free memory was 113.9MB in the beginning and 90.8MB in the end (delta: 23.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-11-09 02:53:39,002 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.37ms. Allocated memory is still 169.9MB. Free memory was 90.8MB in the beginning and 88.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 02:53:39,002 INFO L158 Benchmark]: Boogie Preprocessor took 44.51ms. Allocated memory is still 169.9MB. Free memory was 88.7MB in the beginning and 86.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 02:53:39,003 INFO L158 Benchmark]: RCFGBuilder took 409.78ms. Allocated memory is still 169.9MB. Free memory was 86.5MB in the beginning and 131.4MB in the end (delta: -44.9MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. [2024-11-09 02:53:39,003 INFO L158 Benchmark]: TraceAbstraction took 1742.12ms. Allocated memory was 169.9MB in the beginning and 241.2MB in the end (delta: 71.3MB). Free memory was 131.4MB in the beginning and 170.7MB in the end (delta: -39.3MB). Peak memory consumption was 34.9MB. Max. memory is 16.1GB. [2024-11-09 02:53:39,003 INFO L158 Benchmark]: Witness Printer took 46.45ms. Allocated memory is still 241.2MB. Free memory was 170.7MB in the beginning and 167.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 02:53:39,005 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 169.9MB. Free memory is still 133.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 442.53ms. Allocated memory is still 169.9MB. Free memory was 113.9MB in the beginning and 90.8MB in the end (delta: 23.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.37ms. Allocated memory is still 169.9MB. Free memory was 90.8MB in the beginning and 88.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.51ms. Allocated memory is still 169.9MB. Free memory was 88.7MB in the beginning and 86.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 409.78ms. Allocated memory is still 169.9MB. Free memory was 86.5MB in the beginning and 131.4MB in the end (delta: -44.9MB). Peak memory consumption was 18.2MB. Max. memory is 16.1GB. * TraceAbstraction took 1742.12ms. Allocated memory was 169.9MB in the beginning and 241.2MB in the end (delta: 71.3MB). Free memory was 131.4MB in the beginning and 170.7MB in the end (delta: -39.3MB). Peak memory consumption was 34.9MB. Max. memory is 16.1GB. * Witness Printer took 46.45ms. Allocated memory is still 241.2MB. Free memory was 170.7MB in the beginning and 167.5MB 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) [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: 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. - 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 37 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: 1.6s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 107 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 103 mSDsluCounter, 15 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 13 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 244 IncrementalHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 2 mSDtfsCounter, 244 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=1, InterpolantAutomatonStates: 18, 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, 0.5s InterpolantComputationTime, 53 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 102 SizeOfPredicates, 6 NumberOfNonLiveVariables, 80 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 1/4 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! [2024-11-09 02:53:39,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE