./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-theta/exponential-nondet.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f 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/exponential-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 f87ddde6d61a5d434f69c49dc65eaf95f54327ebb0ef5acca382e4d4744605ae --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:39:25,088 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:39:25,142 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:39:25,148 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:39:25,149 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:39:25,170 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:39:25,170 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:39:25,170 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:39:25,171 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:39:25,174 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:39:25,175 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:39:25,175 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:39:25,175 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:39:25,175 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:39:25,175 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:39:25,176 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:39:25,176 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:39:25,176 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:39:25,176 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:39:25,176 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:39:25,177 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:39:25,177 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:39:25,177 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:39:25,177 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:39:25,177 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:39:25,178 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:39:25,178 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:39:25,178 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:39:25,178 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:39:25,178 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:39:25,178 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:39:25,179 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:39:25,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:39:25,179 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:39:25,179 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:39:25,179 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:39:25,179 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:39:25,180 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:39:25,180 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:39:25,180 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:39:25,182 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:39:25,182 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:39:25,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f87ddde6d61a5d434f69c49dc65eaf95f54327ebb0ef5acca382e4d4744605ae [2024-11-10 10:39:25,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:39:25,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:39:25,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:39:25,383 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:39:25,383 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:39:25,384 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/exponential-nondet.i [2024-11-10 10:39:26,522 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:39:26,727 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:39:26,732 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/exponential-nondet.i [2024-11-10 10:39:26,747 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b870342c/3ab9420f38bb4a92b7c521b79ba35609/FLAGbfde0f7b1 [2024-11-10 10:39:27,099 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b870342c/3ab9420f38bb4a92b7c521b79ba35609 [2024-11-10 10:39:27,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:39:27,102 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:39:27,103 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:39:27,103 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:39:27,107 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:39:27,107 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,108 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2750ca2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27, skipping insertion in model container [2024-11-10 10:39:27,108 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,142 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:39:27,396 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/exponential-nondet.i[33030,33043] [2024-11-10 10:39:27,418 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:39:27,425 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:39:27,462 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/exponential-nondet.i[33030,33043] [2024-11-10 10:39:27,466 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:39:27,502 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:39:27,503 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27 WrapperNode [2024-11-10 10:39:27,503 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:39:27,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:39:27,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:39:27,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:39:27,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,528 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,546 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2024-11-10 10:39:27,547 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:39:27,547 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:39:27,547 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:39:27,547 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:39:27,556 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,562 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,577 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]. [2024-11-10 10:39:27,579 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,579 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,582 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,585 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,586 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,587 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,588 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:39:27,589 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:39:27,589 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:39:27,589 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:39:27,590 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (1/1) ... [2024-11-10 10:39:27,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:39:27,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:39:27,622 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) [2024-11-10 10:39:27,624 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 [2024-11-10 10:39:27,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:39:27,659 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-10 10:39:27,659 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-10 10:39:27,659 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-10 10:39:27,659 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-10 10:39:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:39:27,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:39:27,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:39:27,662 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:39:27,759 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:39:27,761 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:39:27,946 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:39:27,946 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:39:28,041 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:39:28,042 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:39:28,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:39:28 BoogieIcfgContainer [2024-11-10 10:39:28,042 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:39:28,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:39:28,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:39:28,047 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:39:28,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:39:27" (1/3) ... [2024-11-10 10:39:28,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1f43ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:39:28, skipping insertion in model container [2024-11-10 10:39:28,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:39:27" (2/3) ... [2024-11-10 10:39:28,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1f43ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:39:28, skipping insertion in model container [2024-11-10 10:39:28,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:39:28" (3/3) ... [2024-11-10 10:39:28,051 INFO L112 eAbstractionObserver]: Analyzing ICFG exponential-nondet.i [2024-11-10 10:39:28,064 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:39:28,064 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:39:28,064 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:39:28,095 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:39:28,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 64 flow [2024-11-10 10:39:28,142 INFO L124 PetriNetUnfolderBase]: 8/42 cut-off events. [2024-11-10 10:39:28,143 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:39:28,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 42 events. 8/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2024-11-10 10:39:28,145 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 64 flow [2024-11-10 10:39:28,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 55 flow [2024-11-10 10:39:28,158 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:39:28,165 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;@4036dc0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:39:28,165 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:39:28,172 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:39:28,175 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-10 10:39:28,175 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:39:28,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:28,176 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:28,176 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:28,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:28,182 INFO L85 PathProgramCache]: Analyzing trace with hash -453424119, now seen corresponding path program 1 times [2024-11-10 10:39:28,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:28,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998932011] [2024-11-10 10:39:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:28,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:39:28,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:39:28,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:39:28,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998932011] [2024-11-10 10:39:28,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998932011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:39:28,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:39:28,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:39:28,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445646621] [2024-11-10 10:39:28,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:39:28,364 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:39:28,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:39:28,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:39:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:39:28,391 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 28 [2024-11-10 10:39:28,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 55 flow. Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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) [2024-11-10 10:39:28,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:39:28,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 28 [2024-11-10 10:39:28,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:39:28,468 INFO L124 PetriNetUnfolderBase]: 78/187 cut-off events. [2024-11-10 10:39:28,468 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-10 10:39:28,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 187 events. 78/187 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 760 event pairs, 68 based on Foata normal form. 20/200 useless extension candidates. Maximal degree in co-relation 311. Up to 144 conditions per place. [2024-11-10 10:39:28,475 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 14 selfloop transitions, 0 changer transitions 0/22 dead transitions. [2024-11-10 10:39:28,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 22 transitions, 79 flow [2024-11-10 10:39:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:39:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:39:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 36 transitions. [2024-11-10 10:39:28,492 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-10 10:39:28,494 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 55 flow. Second operand 2 states and 36 transitions. [2024-11-10 10:39:28,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 22 transitions, 79 flow [2024-11-10 10:39:28,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 22 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:39:28,498 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 50 flow [2024-11-10 10:39:28,499 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2024-11-10 10:39:28,507 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-11-10 10:39:28,507 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 50 flow [2024-11-10 10:39:28,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 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) [2024-11-10 10:39:28,508 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:28,508 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:28,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:39:28,508 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:28,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:28,509 INFO L85 PathProgramCache]: Analyzing trace with hash -624919507, now seen corresponding path program 1 times [2024-11-10 10:39:28,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:28,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067180560] [2024-11-10 10:39:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:28,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-10 10:39:28,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241645307] [2024-11-10 10:39:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:28,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:39:28,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:39:28,583 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) [2024-11-10 10:39:28,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:39:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:39:28,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 10:39:28,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:39:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:39:28,684 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:39:28,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:39:28,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067180560] [2024-11-10 10:39:28,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-10 10:39:28,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241645307] [2024-11-10 10:39:28,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241645307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:39:28,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:39:28,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:39:28,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162126148] [2024-11-10 10:39:28,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:39:28,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:39:28,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:39:28,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:39:28,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:39:28,690 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 28 [2024-11-10 10:39:28,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 50 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:39:28,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:39:28,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 28 [2024-11-10 10:39:28,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:39:28,783 INFO L124 PetriNetUnfolderBase]: 74/163 cut-off events. [2024-11-10 10:39:28,783 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:39:28,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 163 events. 74/163 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 580 event pairs, 12 based on Foata normal form. 10/171 useless extension candidates. Maximal degree in co-relation 312. Up to 99 conditions per place. [2024-11-10 10:39:28,785 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 20 selfloop transitions, 2 changer transitions 7/37 dead transitions. [2024-11-10 10:39:28,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 37 transitions, 140 flow [2024-11-10 10:39:28,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:39:28,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:39:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-11-10 10:39:28,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-11-10 10:39:28,788 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 50 flow. Second operand 5 states and 81 transitions. [2024-11-10 10:39:28,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 37 transitions, 140 flow [2024-11-10 10:39:28,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 37 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:39:28,790 INFO L231 Difference]: Finished difference. Result has 34 places, 22 transitions, 62 flow [2024-11-10 10:39:28,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=62, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2024-11-10 10:39:28,792 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2024-11-10 10:39:28,792 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions, 62 flow [2024-11-10 10:39:28,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:39:28,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:28,793 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:28,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 10:39:28,996 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 [2024-11-10 10:39:28,997 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:28,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:28,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1521901777, now seen corresponding path program 1 times [2024-11-10 10:39:28,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:28,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006449287] [2024-11-10 10:39:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:28,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:39:29,011 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:39:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:39:29,035 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:39:29,036 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:39:29,037 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-10 10:39:29,039 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-10 10:39:29,039 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-10 10:39:29,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:39:29,040 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-10 10:39:29,042 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:39:29,042 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-10 10:39:29,062 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:39:29,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 36 transitions, 92 flow [2024-11-10 10:39:29,072 INFO L124 PetriNetUnfolderBase]: 12/67 cut-off events. [2024-11-10 10:39:29,072 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 10:39:29,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 67 events. 12/67 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 55. Up to 6 conditions per place. [2024-11-10 10:39:29,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 36 transitions, 92 flow [2024-11-10 10:39:29,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 32 transitions, 82 flow [2024-11-10 10:39:29,075 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:39:29,076 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;@4036dc0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:39:29,076 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:39:29,078 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:39:29,078 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-10 10:39:29,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:39:29,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:29,079 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:29,079 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:29,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:29,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1798025555, now seen corresponding path program 1 times [2024-11-10 10:39:29,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:29,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921587869] [2024-11-10 10:39:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:29,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:39:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:39:29,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:39:29,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921587869] [2024-11-10 10:39:29,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921587869] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:39:29,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:39:29,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:39:29,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348771686] [2024-11-10 10:39:29,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:39:29,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:39:29,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:39:29,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:39:29,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:39:29,110 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-11-10 10:39:29,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2024-11-10 10:39:29,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:39:29,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-11-10 10:39:29,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:39:29,316 INFO L124 PetriNetUnfolderBase]: 1491/2369 cut-off events. [2024-11-10 10:39:29,317 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-11-10 10:39:29,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4587 conditions, 2369 events. 1491/2369 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13100 event pairs, 1400 based on Foata normal form. 182/2443 useless extension candidates. Maximal degree in co-relation 1256. Up to 2097 conditions per place. [2024-11-10 10:39:29,333 INFO L140 encePairwiseOnDemand]: 34/36 looper letters, 20 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2024-11-10 10:39:29,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 118 flow [2024-11-10 10:39:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:39:29,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:39:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 46 transitions. [2024-11-10 10:39:29,335 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-10 10:39:29,335 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 82 flow. Second operand 2 states and 46 transitions. [2024-11-10 10:39:29,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 118 flow [2024-11-10 10:39:29,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 30 transitions, 117 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:39:29,339 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 77 flow [2024-11-10 10:39:29,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=77, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2024-11-10 10:39:29,340 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2024-11-10 10:39:29,340 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 77 flow [2024-11-10 10:39:29,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 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) [2024-11-10 10:39:29,340 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:29,341 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:29,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 10:39:29,341 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:29,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:29,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1742255, now seen corresponding path program 1 times [2024-11-10 10:39:29,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:29,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115408299] [2024-11-10 10:39:29,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:29,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-10 10:39:29,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625806572] [2024-11-10 10:39:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:29,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:39:29,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:39:29,373 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) [2024-11-10 10:39:29,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:39:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:39:29,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 10:39:29,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:39:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:39:29,435 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:39:29,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:39:29,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115408299] [2024-11-10 10:39:29,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-10 10:39:29,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625806572] [2024-11-10 10:39:29,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625806572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:39:29,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:39:29,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:39:29,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006284738] [2024-11-10 10:39:29,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:39:29,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:39:29,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:39:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:39:29,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:39:29,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 36 [2024-11-10 10:39:29,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2024-11-10 10:39:29,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:39:29,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 36 [2024-11-10 10:39:29,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:39:29,639 INFO L124 PetriNetUnfolderBase]: 1571/2369 cut-off events. [2024-11-10 10:39:29,640 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-10 10:39:29,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4732 conditions, 2369 events. 1571/2369 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11906 event pairs, 304 based on Foata normal form. 91/2445 useless extension candidates. Maximal degree in co-relation 4726. Up to 1877 conditions per place. [2024-11-10 10:39:29,653 INFO L140 encePairwiseOnDemand]: 31/36 looper letters, 31 selfloop transitions, 3 changer transitions 15/59 dead transitions. [2024-11-10 10:39:29,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 59 transitions, 245 flow [2024-11-10 10:39:29,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:39:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:39:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-11-10 10:39:29,658 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-10 10:39:29,658 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 77 flow. Second operand 5 states and 111 transitions. [2024-11-10 10:39:29,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 59 transitions, 245 flow [2024-11-10 10:39:29,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:39:29,661 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 104 flow [2024-11-10 10:39:29,661 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2024-11-10 10:39:29,662 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2024-11-10 10:39:29,662 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 104 flow [2024-11-10 10:39:29,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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) [2024-11-10 10:39:29,662 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:29,662 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:29,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 10:39:29,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:39:29,863 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:29,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:29,864 INFO L85 PathProgramCache]: Analyzing trace with hash 754953820, now seen corresponding path program 1 times [2024-11-10 10:39:29,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:29,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164852644] [2024-11-10 10:39:29,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:29,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:39:29,876 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:39:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:39:29,889 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:39:29,889 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:39:29,890 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-10 10:39:29,890 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-10 10:39:29,890 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-10 10:39:29,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 10:39:29,890 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-10 10:39:29,890 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:39:29,891 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-10 10:39:29,907 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:39:29,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 124 flow [2024-11-10 10:39:29,917 INFO L124 PetriNetUnfolderBase]: 16/92 cut-off events. [2024-11-10 10:39:29,917 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-10 10:39:29,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 92 events. 16/92 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 190 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 88. Up to 8 conditions per place. [2024-11-10 10:39:29,918 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 124 flow [2024-11-10 10:39:29,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 40 transitions, 113 flow [2024-11-10 10:39:29,920 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:39:29,921 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;@4036dc0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:39:29,921 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:39:29,923 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:39:29,923 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-10 10:39:29,923 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:39:29,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:29,923 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:29,923 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:29,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:29,924 INFO L85 PathProgramCache]: Analyzing trace with hash -100897191, now seen corresponding path program 1 times [2024-11-10 10:39:29,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:29,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099688083] [2024-11-10 10:39:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:29,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:39:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:39:29,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:39:29,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099688083] [2024-11-10 10:39:29,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099688083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:39:29,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:39:29,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:39:29,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715534077] [2024-11-10 10:39:29,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:39:29,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:39:29,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:39:29,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:39:29,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:39:29,947 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-11-10 10:39:29,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 113 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 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) [2024-11-10 10:39:29,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:39:29,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-11-10 10:39:29,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:39:32,030 INFO L124 PetriNetUnfolderBase]: 20688/28585 cut-off events. [2024-11-10 10:39:32,030 INFO L125 PetriNetUnfolderBase]: For 2383/2383 co-relation queries the response was YES. [2024-11-10 10:39:32,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56158 conditions, 28585 events. 20688/28585 cut-off events. For 2383/2383 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 176544 event pairs, 19868 based on Foata normal form. 1640/29228 useless extension candidates. Maximal degree in co-relation 16283. Up to 26154 conditions per place. [2024-11-10 10:39:32,225 INFO L140 encePairwiseOnDemand]: 42/44 looper letters, 26 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2024-11-10 10:39:32,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 38 transitions, 161 flow [2024-11-10 10:39:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:39:32,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:39:32,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 56 transitions. [2024-11-10 10:39:32,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-10 10:39:32,226 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 113 flow. Second operand 2 states and 56 transitions. [2024-11-10 10:39:32,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 38 transitions, 161 flow [2024-11-10 10:39:32,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 38 transitions, 156 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-10 10:39:32,239 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 104 flow [2024-11-10 10:39:32,239 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=104, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2024-11-10 10:39:32,239 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-11-10 10:39:32,240 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 104 flow [2024-11-10 10:39:32,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 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) [2024-11-10 10:39:32,240 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:32,240 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:32,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 10:39:32,240 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:32,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:32,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1148955523, now seen corresponding path program 1 times [2024-11-10 10:39:32,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:32,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024862830] [2024-11-10 10:39:32,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:32,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-10 10:39:32,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523437750] [2024-11-10 10:39:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:32,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:39:32,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:39:32,251 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:39:32,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:39:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:39:32,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 10:39:32,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:39:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:39:32,330 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:39:32,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:39:32,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024862830] [2024-11-10 10:39:32,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-10 10:39:32,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523437750] [2024-11-10 10:39:32,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523437750] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:39:32,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:39:32,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:39:32,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031157702] [2024-11-10 10:39:32,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:39:32,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:39:32,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:39:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:39:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:39:32,335 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-11-10 10:39:32,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2024-11-10 10:39:32,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:39:32,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-11-10 10:39:32,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:39:33,942 INFO L124 PetriNetUnfolderBase]: 22712/29390 cut-off events. [2024-11-10 10:39:33,943 INFO L125 PetriNetUnfolderBase]: For 619/619 co-relation queries the response was YES. [2024-11-10 10:39:34,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59403 conditions, 29390 events. 22712/29390 cut-off events. For 619/619 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 154838 event pairs, 5494 based on Foata normal form. 820/30160 useless extension candidates. Maximal degree in co-relation 59395. Up to 25235 conditions per place. [2024-11-10 10:39:34,110 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 41 selfloop transitions, 4 changer transitions 22/79 dead transitions. [2024-11-10 10:39:34,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 79 transitions, 342 flow [2024-11-10 10:39:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:39:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:39:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-11-10 10:39:34,111 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6318181818181818 [2024-11-10 10:39:34,112 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 104 flow. Second operand 5 states and 139 transitions. [2024-11-10 10:39:34,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 79 transitions, 342 flow [2024-11-10 10:39:34,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 79 transitions, 342 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:39:34,113 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 140 flow [2024-11-10 10:39:34,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2024-11-10 10:39:34,114 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2024-11-10 10:39:34,114 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 140 flow [2024-11-10 10:39:34,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2024-11-10 10:39:34,114 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:34,114 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:34,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 10:39:34,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:39:34,319 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:34,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:34,319 INFO L85 PathProgramCache]: Analyzing trace with hash -592571143, now seen corresponding path program 1 times [2024-11-10 10:39:34,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:34,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072815909] [2024-11-10 10:39:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:34,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:39:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:39:34,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:39:34,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072815909] [2024-11-10 10:39:34,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072815909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:39:34,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480668893] [2024-11-10 10:39:34,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:34,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:39:34,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:39:34,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:39:34,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:39:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:39:34,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 10:39:34,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:39:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:39:34,506 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:39:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:39:34,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480668893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:39:34,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:39:34,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-10 10:39:34,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883912745] [2024-11-10 10:39:34,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:39:34,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 10:39:34,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:39:34,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 10:39:34,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-10 10:39:34,544 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-11-10 10:39:34,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 140 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 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) [2024-11-10 10:39:34,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:39:34,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-11-10 10:39:34,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:39:37,212 INFO L124 PetriNetUnfolderBase]: 29780/40161 cut-off events. [2024-11-10 10:39:37,212 INFO L125 PetriNetUnfolderBase]: For 22323/22323 co-relation queries the response was YES. [2024-11-10 10:39:37,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96014 conditions, 40161 events. 29780/40161 cut-off events. For 22323/22323 co-relation queries the response was YES. Maximal size of possible extension queue 1319. Compared 243572 event pairs, 23320 based on Foata normal form. 0/38250 useless extension candidates. Maximal degree in co-relation 96002. Up to 33656 conditions per place. [2024-11-10 10:39:37,555 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 44 selfloop transitions, 4 changer transitions 4/62 dead transitions. [2024-11-10 10:39:37,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 62 transitions, 307 flow [2024-11-10 10:39:37,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:39:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:39:37,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-11-10 10:39:37,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-11-10 10:39:37,558 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 140 flow. Second operand 5 states and 107 transitions. [2024-11-10 10:39:37,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 62 transitions, 307 flow [2024-11-10 10:39:37,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 298 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-10 10:39:37,630 INFO L231 Difference]: Finished difference. Result has 60 places, 43 transitions, 156 flow [2024-11-10 10:39:37,631 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=60, PETRI_TRANSITIONS=43} [2024-11-10 10:39:37,631 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2024-11-10 10:39:37,631 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 43 transitions, 156 flow [2024-11-10 10:39:37,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 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) [2024-11-10 10:39:37,632 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:37,632 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:37,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 10:39:37,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:39:37,832 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:37,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:37,833 INFO L85 PathProgramCache]: Analyzing trace with hash -639317850, now seen corresponding path program 1 times [2024-11-10 10:39:37,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:37,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787127046] [2024-11-10 10:39:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:37,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-10 10:39:37,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178618013] [2024-11-10 10:39:37,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:37,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:39:37,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:39:37,869 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:39:37,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:39:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:39:37,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-10 10:39:37,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:39:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:39:38,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:39:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:39:38,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:39:38,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787127046] [2024-11-10 10:39:38,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-10 10:39:38,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178618013] [2024-11-10 10:39:38,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178618013] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 10:39:38,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:39:38,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-10 10:39:38,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334157397] [2024-11-10 10:39:38,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:39:38,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:39:38,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:39:38,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:39:38,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:39:38,103 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-11-10 10:39:38,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 43 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2024-11-10 10:39:38,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:39:38,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-11-10 10:39:38,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:39:41,040 INFO L124 PetriNetUnfolderBase]: 33973/45149 cut-off events. [2024-11-10 10:39:41,041 INFO L125 PetriNetUnfolderBase]: For 23609/24402 co-relation queries the response was YES. [2024-11-10 10:39:41,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114485 conditions, 45149 events. 33973/45149 cut-off events. For 23609/24402 co-relation queries the response was YES. Maximal size of possible extension queue 1585. Compared 262783 event pairs, 8570 based on Foata normal form. 1382/46228 useless extension candidates. Maximal degree in co-relation 114472. Up to 29679 conditions per place. [2024-11-10 10:39:41,337 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 46 selfloop transitions, 8 changer transitions 25/91 dead transitions. [2024-11-10 10:39:41,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 91 transitions, 480 flow [2024-11-10 10:39:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:39:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:39:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-11-10 10:39:41,338 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2024-11-10 10:39:41,338 INFO L175 Difference]: Start difference. First operand has 60 places, 43 transitions, 156 flow. Second operand 5 states and 145 transitions. [2024-11-10 10:39:41,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 91 transitions, 480 flow [2024-11-10 10:39:41,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 91 transitions, 479 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:39:41,366 INFO L231 Difference]: Finished difference. Result has 67 places, 47 transitions, 230 flow [2024-11-10 10:39:41,366 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=67, PETRI_TRANSITIONS=47} [2024-11-10 10:39:41,367 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2024-11-10 10:39:41,367 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 47 transitions, 230 flow [2024-11-10 10:39:41,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2024-11-10 10:39:41,367 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:41,367 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:41,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 10:39:41,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-10 10:39:41,568 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:41,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash -97965314, now seen corresponding path program 2 times [2024-11-10 10:39:41,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:41,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986133145] [2024-11-10 10:39:41,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:41,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-10 10:39:41,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108241597] [2024-11-10 10:39:41,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:39:41,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:39:41,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:39:41,592 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:39:41,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 10:39:41,643 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:39:41,643 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:39:41,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-10 10:39:41,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:39:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:39:41,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:39:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:39:41,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:39:41,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986133145] [2024-11-10 10:39:41,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-10 10:39:41,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108241597] [2024-11-10 10:39:41,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108241597] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 10:39:41,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:39:41,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-10 10:39:41,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214268027] [2024-11-10 10:39:41,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:39:41,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:39:41,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:39:41,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:39:41,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-10 10:39:41,731 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-11-10 10:39:41,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 47 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2024-11-10 10:39:41,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:39:41,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-11-10 10:39:41,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:39:44,242 INFO L124 PetriNetUnfolderBase]: 26465/37236 cut-off events. [2024-11-10 10:39:44,242 INFO L125 PetriNetUnfolderBase]: For 63779/64559 co-relation queries the response was YES. [2024-11-10 10:39:44,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107653 conditions, 37236 events. 26465/37236 cut-off events. For 63779/64559 co-relation queries the response was YES. Maximal size of possible extension queue 1490. Compared 242018 event pairs, 10268 based on Foata normal form. 780/37382 useless extension candidates. Maximal degree in co-relation 107637. Up to 16253 conditions per place. [2024-11-10 10:39:44,441 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 26 selfloop transitions, 0 changer transitions 37/72 dead transitions. [2024-11-10 10:39:44,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 462 flow [2024-11-10 10:39:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:39:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:39:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-11-10 10:39:44,443 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-11-10 10:39:44,443 INFO L175 Difference]: Start difference. First operand has 67 places, 47 transitions, 230 flow. Second operand 4 states and 106 transitions. [2024-11-10 10:39:44,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 462 flow [2024-11-10 10:39:45,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 378 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-11-10 10:39:45,695 INFO L231 Difference]: Finished difference. Result has 62 places, 35 transitions, 127 flow [2024-11-10 10:39:45,695 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=62, PETRI_TRANSITIONS=35} [2024-11-10 10:39:45,696 INFO L277 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2024-11-10 10:39:45,696 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 35 transitions, 127 flow [2024-11-10 10:39:45,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 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) [2024-11-10 10:39:45,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:45,696 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:45,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 10:39:45,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:39:45,900 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:45,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:45,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1835032963, now seen corresponding path program 1 times [2024-11-10 10:39:45,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:45,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111924643] [2024-11-10 10:39:45,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:45,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:39:45,918 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-10 10:39:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-10 10:39:45,933 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-10 10:39:45,933 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-10 10:39:45,933 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-10 10:39:45,933 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-10 10:39:45,933 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-10 10:39:45,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-10 10:39:45,934 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2024-11-10 10:39:45,934 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-10 10:39:45,934 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-10 10:39:45,952 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:39:45,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 52 transitions, 160 flow [2024-11-10 10:39:45,962 INFO L124 PetriNetUnfolderBase]: 20/117 cut-off events. [2024-11-10 10:39:45,962 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-10 10:39:45,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 117 events. 20/117 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 228 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 123. Up to 10 conditions per place. [2024-11-10 10:39:45,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 52 transitions, 160 flow [2024-11-10 10:39:45,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 48 transitions, 148 flow [2024-11-10 10:39:45,964 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:39:45,964 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;@4036dc0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:39:45,965 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:39:45,966 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:39:45,966 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-10 10:39:45,966 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:39:45,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:39:45,966 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:39:45,966 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:39:45,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:39:45,967 INFO L85 PathProgramCache]: Analyzing trace with hash 342993677, now seen corresponding path program 1 times [2024-11-10 10:39:45,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:39:45,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097282867] [2024-11-10 10:39:45,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:39:45,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:39:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:39:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:39:45,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:39:45,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097282867] [2024-11-10 10:39:45,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097282867] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:39:45,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:39:45,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:39:45,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838047191] [2024-11-10 10:39:45,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:39:45,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:39:45,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:39:45,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:39:45,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:39:45,978 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-11-10 10:39:45,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 148 flow. Second operand has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:39:45,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:39:45,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-11-10 10:39:45,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand