./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 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-theta/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.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:57:28,602 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:57:28,696 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:57:28,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:57:28,709 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:57:28,748 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:57:28,753 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:57:28,753 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:57:28,754 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:57:28,754 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:57:28,755 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:57:28,755 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:57:28,756 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:57:28,757 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:57:28,758 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:57:28,761 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:57:28,761 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:57:28,762 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:57:28,762 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:57:28,762 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:57:28,762 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:57:28,763 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:57:28,763 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:57:28,763 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:57:28,763 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:57:28,763 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:57:28,764 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:57:28,764 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:57:28,764 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:57:28,764 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:57:28,765 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:57:28,765 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:57:28,765 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:57:28,765 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:57:28,765 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:57:28,766 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:57:28,766 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:57:28,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:57:28,772 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:57:28,772 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:57:28,773 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:57:28,773 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:57:28,773 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f87ddde6d61a5d434f69c49dc65eaf95f54327ebb0ef5acca382e4d4744605ae [2024-11-19 01:57:29,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:57:29,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:57:29,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:57:29,173 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:57:29,173 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:57:29,174 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/exponential-nondet.i [2024-11-19 01:57:30,776 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:57:31,049 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:57:31,051 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-theta/exponential-nondet.i [2024-11-19 01:57:31,067 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5be038f9f/a7b96ee341d64a67bd90274ee8e6ea89/FLAGdc827ad0e [2024-11-19 01:57:31,083 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5be038f9f/a7b96ee341d64a67bd90274ee8e6ea89 [2024-11-19 01:57:31,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:57:31,088 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:57:31,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:57:31,091 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:57:31,095 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:57:31,096 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75106175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31, skipping insertion in model container [2024-11-19 01:57:31,097 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,139 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:57:31,413 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] [2024-11-19 01:57:31,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:57:31,446 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:57:31,488 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] [2024-11-19 01:57:31,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:57:31,521 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:57:31,522 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31 WrapperNode [2024-11-19 01:57:31,522 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:57:31,523 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:57:31,523 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:57:31,523 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:57:31,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,540 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,555 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 64 [2024-11-19 01:57:31,556 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:57:31,557 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:57:31,557 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:57:31,557 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:57:31,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,565 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,567 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,576 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-19 01:57:31,576 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,577 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,580 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,582 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,583 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,584 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,585 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:57:31,586 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:57:31,586 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:57:31,586 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:57:31,587 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (1/1) ... [2024-11-19 01:57:31,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:57:31,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:31,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 01:57:31,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 01:57:31,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:57:31,750 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2024-11-19 01:57:31,750 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2024-11-19 01:57:31,750 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2024-11-19 01:57:31,750 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2024-11-19 01:57:31,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:57:31,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:57:31,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:57:31,753 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 01:57:31,905 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:57:31,907 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:57:32,050 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:57:32,051 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:57:32,158 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:57:32,158 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-19 01:57:32,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:57:32 BoogieIcfgContainer [2024-11-19 01:57:32,159 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:57:32,160 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:57:32,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:57:32,165 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:57:32,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:57:31" (1/3) ... [2024-11-19 01:57:32,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bb9b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:57:32, skipping insertion in model container [2024-11-19 01:57:32,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:57:31" (2/3) ... [2024-11-19 01:57:32,166 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18bb9b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:57:32, skipping insertion in model container [2024-11-19 01:57:32,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:57:32" (3/3) ... [2024-11-19 01:57:32,168 INFO L112 eAbstractionObserver]: Analyzing ICFG exponential-nondet.i [2024-11-19 01:57:32,183 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:57:32,183 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:57:32,184 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:57:32,210 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:57:32,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 22 transitions, 52 flow [2024-11-19 01:57:32,266 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2024-11-19 01:57:32,268 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:57:32,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 4/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 4 conditions per place. [2024-11-19 01:57:32,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 22 transitions, 52 flow [2024-11-19 01:57:32,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 43 flow [2024-11-19 01:57:32,286 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:57:32,294 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;@1880a759, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:57:32,295 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:57:32,300 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:57:32,303 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-11-19 01:57:32,303 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:57:32,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:32,304 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 01:57:32,305 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:32,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash 204275773, now seen corresponding path program 1 times [2024-11-19 01:57:32,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:32,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221226509] [2024-11-19 01:57:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:32,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 01:57:32,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4198282] [2024-11-19 01:57:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:32,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:32,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:32,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:57:32,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 01:57:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:32,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:57:32,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:32,600 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:57:32,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221226509] [2024-11-19 01:57:32,601 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 01:57:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4198282] [2024-11-19 01:57:32,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4198282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:57:32,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:57:32,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:57:32,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709960273] [2024-11-19 01:57:32,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:57:32,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:57:32,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:32,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:57:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:57:32,661 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 22 [2024-11-19 01:57:32,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 43 flow. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:32,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:32,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 22 [2024-11-19 01:57:32,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:32,796 INFO L124 PetriNetUnfolderBase]: 45/102 cut-off events. [2024-11-19 01:57:32,799 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 01:57:32,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 102 events. 45/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 371 event pairs, 7 based on Foata normal form. 7/91 useless extension candidates. Maximal degree in co-relation 187. Up to 65 conditions per place. [2024-11-19 01:57:32,802 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 18 selfloop transitions, 2 changer transitions 5/30 dead transitions. [2024-11-19 01:57:32,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 120 flow [2024-11-19 01:57:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:57:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:57:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-11-19 01:57:32,818 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5636363636363636 [2024-11-19 01:57:32,820 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 43 flow. Second operand 5 states and 62 transitions. [2024-11-19 01:57:32,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 120 flow [2024-11-19 01:57:32,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 118 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:57:32,828 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 54 flow [2024-11-19 01:57:32,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=54, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2024-11-19 01:57:32,834 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2024-11-19 01:57:32,834 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 54 flow [2024-11-19 01:57:32,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:32,835 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:32,835 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:32,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 01:57:33,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-19 01:57:33,036 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:33,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:33,036 INFO L85 PathProgramCache]: Analyzing trace with hash -629516268, now seen corresponding path program 1 times [2024-11-19 01:57:33,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:33,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508498587] [2024-11-19 01:57:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:33,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:57:33,084 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:57:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:57:33,135 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:57:33,139 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:57:33,141 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-19 01:57:33,142 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-19 01:57:33,146 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-19 01:57:33,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 01:57:33,147 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-11-19 01:57:33,149 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 01:57:33,149 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-19 01:57:33,181 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:57:33,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 30 transitions, 80 flow [2024-11-19 01:57:33,201 INFO L124 PetriNetUnfolderBase]: 6/49 cut-off events. [2024-11-19 01:57:33,204 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 01:57:33,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 49 events. 6/49 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 6 conditions per place. [2024-11-19 01:57:33,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 30 transitions, 80 flow [2024-11-19 01:57:33,208 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 26 transitions, 70 flow [2024-11-19 01:57:33,213 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:57:33,213 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;@1880a759, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:57:33,213 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:57:33,217 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:57:33,219 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-11-19 01:57:33,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:57:33,219 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:33,219 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 01:57:33,220 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:33,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:33,220 INFO L85 PathProgramCache]: Analyzing trace with hash 232904923, now seen corresponding path program 1 times [2024-11-19 01:57:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:33,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947787537] [2024-11-19 01:57:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:33,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 01:57:33,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318546353] [2024-11-19 01:57:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:33,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:33,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:33,270 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:57:33,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 01:57:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:33,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:57:33,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:33,337 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:57:33,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:33,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947787537] [2024-11-19 01:57:33,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 01:57:33,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318546353] [2024-11-19 01:57:33,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318546353] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:57:33,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:57:33,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:57:33,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658737579] [2024-11-19 01:57:33,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:57:33,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:57:33,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:33,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:57:33,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:57:33,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-11-19 01:57:33,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 70 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) [2024-11-19 01:57:33,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:33,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-11-19 01:57:33,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:33,528 INFO L124 PetriNetUnfolderBase]: 649/1010 cut-off events. [2024-11-19 01:57:33,528 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-19 01:57:33,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2073 conditions, 1010 events. 649/1010 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 4798 event pairs, 323 based on Foata normal form. 43/954 useless extension candidates. Maximal degree in co-relation 1691. Up to 821 conditions per place. [2024-11-19 01:57:33,540 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 27 selfloop transitions, 3 changer transitions 11/49 dead transitions. [2024-11-19 01:57:33,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 49 transitions, 211 flow [2024-11-19 01:57:33,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:57:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:57:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-11-19 01:57:33,543 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-19 01:57:33,543 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 70 flow. Second operand 5 states and 93 transitions. [2024-11-19 01:57:33,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 49 transitions, 211 flow [2024-11-19 01:57:33,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 49 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:57:33,545 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 96 flow [2024-11-19 01:57:33,546 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2024-11-19 01:57:33,546 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2024-11-19 01:57:33,547 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 96 flow [2024-11-19 01:57:33,547 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) [2024-11-19 01:57:33,547 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:33,547 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:33,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 01:57:33,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-19 01:57:33,749 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:33,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:33,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1741142845, now seen corresponding path program 1 times [2024-11-19 01:57:33,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:33,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355447675] [2024-11-19 01:57:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:33,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:33,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:33,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355447675] [2024-11-19 01:57:33,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355447675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:57:33,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783799205] [2024-11-19 01:57:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:33,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:33,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:33,862 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) [2024-11-19 01:57:33,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 01:57:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:33,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 01:57:33,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:33,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:57:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:33,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783799205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:57:33,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:57:33,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-19 01:57:33,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911148827] [2024-11-19 01:57:33,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:57:33,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:57:33,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:33,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:57:33,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:57:33,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 30 [2024-11-19 01:57:33,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 96 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:33,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:33,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 30 [2024-11-19 01:57:33,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:34,092 INFO L124 PetriNetUnfolderBase]: 340/651 cut-off events. [2024-11-19 01:57:34,093 INFO L125 PetriNetUnfolderBase]: For 100/110 co-relation queries the response was YES. [2024-11-19 01:57:34,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1388 conditions, 651 events. 340/651 cut-off events. For 100/110 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3798 event pairs, 253 based on Foata normal form. 28/590 useless extension candidates. Maximal degree in co-relation 1187. Up to 418 conditions per place. [2024-11-19 01:57:34,099 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 17 selfloop transitions, 4 changer transitions 2/36 dead transitions. [2024-11-19 01:57:34,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 36 transitions, 158 flow [2024-11-19 01:57:34,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:57:34,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:57:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-11-19 01:57:34,102 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-11-19 01:57:34,103 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 96 flow. Second operand 5 states and 89 transitions. [2024-11-19 01:57:34,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 36 transitions, 158 flow [2024-11-19 01:57:34,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 153 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-19 01:57:34,108 INFO L231 Difference]: Finished difference. Result has 43 places, 30 transitions, 113 flow [2024-11-19 01:57:34,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=43, PETRI_TRANSITIONS=30} [2024-11-19 01:57:34,109 INFO L277 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2024-11-19 01:57:34,110 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 30 transitions, 113 flow [2024-11-19 01:57:34,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:34,110 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:34,111 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:34,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 01:57:34,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:34,312 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] === [2024-11-19 01:57:34,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:34,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1948238216, now seen corresponding path program 1 times [2024-11-19 01:57:34,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:34,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363207367] [2024-11-19 01:57:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:34,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:57:34,337 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:57:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:57:34,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:57:34,356 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:57:34,357 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-19 01:57:34,357 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-19 01:57:34,357 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-19 01:57:34,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 01:57:34,357 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-11-19 01:57:34,358 WARN L244 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 01:57:34,360 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-11-19 01:57:34,374 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:57:34,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 38 transitions, 112 flow [2024-11-19 01:57:34,380 INFO L124 PetriNetUnfolderBase]: 8/68 cut-off events. [2024-11-19 01:57:34,381 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-19 01:57:34,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 68 events. 8/68 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 124 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 70. Up to 8 conditions per place. [2024-11-19 01:57:34,382 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 38 transitions, 112 flow [2024-11-19 01:57:34,382 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 34 transitions, 101 flow [2024-11-19 01:57:34,384 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:57:34,384 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;@1880a759, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:57:34,385 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:57:34,386 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:57:34,386 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-11-19 01:57:34,386 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:57:34,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:34,387 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 01:57:34,388 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:34,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:34,388 INFO L85 PathProgramCache]: Analyzing trace with hash 269168513, now seen corresponding path program 1 times [2024-11-19 01:57:34,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:34,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965355162] [2024-11-19 01:57:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:34,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 01:57:34,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39294309] [2024-11-19 01:57:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:34,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:34,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:34,403 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) [2024-11-19 01:57:34,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 01:57:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:34,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:57:34,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:34,480 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:57:34,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:34,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965355162] [2024-11-19 01:57:34,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 01:57:34,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39294309] [2024-11-19 01:57:34,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39294309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:57:34,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:57:34,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:57:34,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476763275] [2024-11-19 01:57:34,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:57:34,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:57:34,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:57:34,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:57:34,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-19 01:57:34,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:34,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:34,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-19 01:57:34,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:35,201 INFO L124 PetriNetUnfolderBase]: 6345/8452 cut-off events. [2024-11-19 01:57:35,201 INFO L125 PetriNetUnfolderBase]: For 930/930 co-relation queries the response was YES. [2024-11-19 01:57:35,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17501 conditions, 8452 events. 6345/8452 cut-off events. For 930/930 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 41986 event pairs, 3873 based on Foata normal form. 259/8162 useless extension candidates. Maximal degree in co-relation 13849. Up to 7365 conditions per place. [2024-11-19 01:57:35,313 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 35 selfloop transitions, 4 changer transitions 16/66 dead transitions. [2024-11-19 01:57:35,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 66 transitions, 302 flow [2024-11-19 01:57:35,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:57:35,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:57:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-11-19 01:57:35,316 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6421052631578947 [2024-11-19 01:57:35,316 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 101 flow. Second operand 5 states and 122 transitions. [2024-11-19 01:57:35,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 66 transitions, 302 flow [2024-11-19 01:57:35,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 292 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-19 01:57:35,318 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 132 flow [2024-11-19 01:57:35,323 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2024-11-19 01:57:35,324 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 6 predicate places. [2024-11-19 01:57:35,324 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 132 flow [2024-11-19 01:57:35,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:35,324 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:35,324 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:35,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 01:57:35,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:35,525 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:35,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash 83570640, now seen corresponding path program 1 times [2024-11-19 01:57:35,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:35,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384821529] [2024-11-19 01:57:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:35,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:35,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:35,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384821529] [2024-11-19 01:57:35,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384821529] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:57:35,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454865896] [2024-11-19 01:57:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:35,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:35,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:35,639 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) [2024-11-19 01:57:35,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 01:57:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:35,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 01:57:35,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:35,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:57:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:35,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454865896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:57:35,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:57:35,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-19 01:57:35,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368416743] [2024-11-19 01:57:35,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:57:35,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:57:35,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:35,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:57:35,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:57:35,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 38 [2024-11-19 01:57:35,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 132 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:35,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:35,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 38 [2024-11-19 01:57:35,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:36,220 INFO L124 PetriNetUnfolderBase]: 3156/4951 cut-off events. [2024-11-19 01:57:36,220 INFO L125 PetriNetUnfolderBase]: For 1026/1204 co-relation queries the response was YES. [2024-11-19 01:57:36,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10726 conditions, 4951 events. 3156/4951 cut-off events. For 1026/1204 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 33808 event pairs, 2445 based on Foata normal form. 168/4420 useless extension candidates. Maximal degree in co-relation 9051. Up to 3242 conditions per place. [2024-11-19 01:57:36,259 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 23 selfloop transitions, 4 changer transitions 2/47 dead transitions. [2024-11-19 01:57:36,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 47 transitions, 210 flow [2024-11-19 01:57:36,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:57:36,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:57:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-11-19 01:57:36,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-11-19 01:57:36,261 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 132 flow. Second operand 5 states and 115 transitions. [2024-11-19 01:57:36,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 47 transitions, 210 flow [2024-11-19 01:57:36,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 204 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-19 01:57:36,277 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 148 flow [2024-11-19 01:57:36,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2024-11-19 01:57:36,278 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 8 predicate places. [2024-11-19 01:57:36,278 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 148 flow [2024-11-19 01:57:36,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:36,279 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:36,279 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:36,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 01:57:36,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:36,480 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:36,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:36,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1960584096, now seen corresponding path program 1 times [2024-11-19 01:57:36,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:36,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894263766] [2024-11-19 01:57:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:36,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 01:57:36,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370486907] [2024-11-19 01:57:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:36,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:36,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:36,503 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) [2024-11-19 01:57:36,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 01:57:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:36,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:57:36,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:57:36,608 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:57:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:57:36,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:36,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894263766] [2024-11-19 01:57:36,667 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 01:57:36,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370486907] [2024-11-19 01:57:36,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370486907] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:57:36,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 01:57:36,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-19 01:57:36,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644622804] [2024-11-19 01:57:36,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:57:36,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:57:36,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:36,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:57:36,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:57:36,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 38 [2024-11-19 01:57:36,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:36,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:36,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 38 [2024-11-19 01:57:36,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:37,030 INFO L124 PetriNetUnfolderBase]: 2883/4253 cut-off events. [2024-11-19 01:57:37,034 INFO L125 PetriNetUnfolderBase]: For 950/1186 co-relation queries the response was YES. [2024-11-19 01:57:37,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9995 conditions, 4253 events. 2883/4253 cut-off events. For 950/1186 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 26904 event pairs, 1513 based on Foata normal form. 276/3967 useless extension candidates. Maximal degree in co-relation 4671. Up to 1892 conditions per place. [2024-11-19 01:57:37,059 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 25 selfloop transitions, 1 changer transitions 7/49 dead transitions. [2024-11-19 01:57:37,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 232 flow [2024-11-19 01:57:37,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:57:37,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:57:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-19 01:57:37,061 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2024-11-19 01:57:37,061 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 148 flow. Second operand 4 states and 96 transitions. [2024-11-19 01:57:37,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 232 flow [2024-11-19 01:57:37,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 49 transitions, 223 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-19 01:57:37,069 INFO L231 Difference]: Finished difference. Result has 54 places, 36 transitions, 129 flow [2024-11-19 01:57:37,069 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=54, PETRI_TRANSITIONS=36} [2024-11-19 01:57:37,070 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 7 predicate places. [2024-11-19 01:57:37,070 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 36 transitions, 129 flow [2024-11-19 01:57:37,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:37,070 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:37,070 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:37,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 01:57:37,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:37,271 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:37,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:37,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1746744188, now seen corresponding path program 1 times [2024-11-19 01:57:37,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:37,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042317407] [2024-11-19 01:57:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:37,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:57:37,301 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:57:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:57:37,321 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:57:37,324 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:57:37,324 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-19 01:57:37,325 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-19 01:57:37,325 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-19 01:57:37,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 01:57:37,325 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-19 01:57:37,326 WARN L244 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 01:57:37,326 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-11-19 01:57:37,363 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:57:37,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 46 transitions, 148 flow [2024-11-19 01:57:37,377 INFO L124 PetriNetUnfolderBase]: 10/87 cut-off events. [2024-11-19 01:57:37,378 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-19 01:57:37,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 87 events. 10/87 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 171 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 99. Up to 10 conditions per place. [2024-11-19 01:57:37,380 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 46 transitions, 148 flow [2024-11-19 01:57:37,381 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 42 transitions, 136 flow [2024-11-19 01:57:37,382 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:57:37,384 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;@1880a759, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:57:37,384 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:57:37,386 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:57:37,386 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-11-19 01:57:37,386 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:57:37,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:37,387 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 01:57:37,387 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:37,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:37,387 INFO L85 PathProgramCache]: Analyzing trace with hash 313066543, now seen corresponding path program 1 times [2024-11-19 01:57:37,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:37,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403274366] [2024-11-19 01:57:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:37,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 01:57:37,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145383725] [2024-11-19 01:57:37,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:37,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:37,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:37,406 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:57:37,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 01:57:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:37,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:57:37,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:37,491 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:57:37,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:37,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403274366] [2024-11-19 01:57:37,492 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 01:57:37,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145383725] [2024-11-19 01:57:37,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145383725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:57:37,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:57:37,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:57:37,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278661916] [2024-11-19 01:57:37,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:57:37,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:57:37,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:37,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:57:37,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:57:37,526 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-11-19 01:57:37,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:37,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:37,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-11-19 01:57:37,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:41,734 INFO L124 PetriNetUnfolderBase]: 52825/65320 cut-off events. [2024-11-19 01:57:41,735 INFO L125 PetriNetUnfolderBase]: For 9578/9578 co-relation queries the response was YES. [2024-11-19 01:57:42,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135507 conditions, 65320 events. 52825/65320 cut-off events. For 9578/9578 co-relation queries the response was YES. Maximal size of possible extension queue 2924. Compared 329676 event pairs, 36233 based on Foata normal form. 1555/63700 useless extension candidates. Maximal degree in co-relation 105375. Up to 57877 conditions per place. [2024-11-19 01:57:42,371 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 43 selfloop transitions, 5 changer transitions 21/83 dead transitions. [2024-11-19 01:57:42,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 83 transitions, 401 flow [2024-11-19 01:57:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:57:42,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:57:42,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-11-19 01:57:42,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6565217391304348 [2024-11-19 01:57:42,372 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 136 flow. Second operand 5 states and 151 transitions. [2024-11-19 01:57:42,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 83 transitions, 401 flow [2024-11-19 01:57:42,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 375 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-11-19 01:57:42,377 INFO L231 Difference]: Finished difference. Result has 65 places, 46 transitions, 168 flow [2024-11-19 01:57:42,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=65, PETRI_TRANSITIONS=46} [2024-11-19 01:57:42,378 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2024-11-19 01:57:42,378 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 46 transitions, 168 flow [2024-11-19 01:57:42,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:42,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:42,378 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:42,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 01:57:42,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:42,580 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:42,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:42,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1091019805, now seen corresponding path program 1 times [2024-11-19 01:57:42,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:42,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042007410] [2024-11-19 01:57:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:42,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:42,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:42,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042007410] [2024-11-19 01:57:42,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042007410] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:57:42,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845193062] [2024-11-19 01:57:42,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:42,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:42,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:42,646 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:57:42,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 01:57:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:42,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-19 01:57:42,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:42,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:57:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:42,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845193062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:57:42,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:57:42,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-19 01:57:42,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498699987] [2024-11-19 01:57:42,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:57:42,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:57:42,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:42,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:57:42,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:57:42,760 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 46 [2024-11-19 01:57:42,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 46 transitions, 168 flow. Second operand has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:42,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:42,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 46 [2024-11-19 01:57:42,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:45,634 INFO L124 PetriNetUnfolderBase]: 25612/35903 cut-off events. [2024-11-19 01:57:45,635 INFO L125 PetriNetUnfolderBase]: For 9730/10562 co-relation queries the response was YES. [2024-11-19 01:57:45,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78576 conditions, 35903 events. 25612/35903 cut-off events. For 9730/10562 co-relation queries the response was YES. Maximal size of possible extension queue 2215. Compared 255083 event pairs, 18801 based on Foata normal form. 848/31415 useless extension candidates. Maximal degree in co-relation 66211. Up to 23954 conditions per place. [2024-11-19 01:57:46,020 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 29 selfloop transitions, 4 changer transitions 2/58 dead transitions. [2024-11-19 01:57:46,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 262 flow [2024-11-19 01:57:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 01:57:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 01:57:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-11-19 01:57:46,021 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6130434782608696 [2024-11-19 01:57:46,021 INFO L175 Difference]: Start difference. First operand has 65 places, 46 transitions, 168 flow. Second operand 5 states and 141 transitions. [2024-11-19 01:57:46,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 262 flow [2024-11-19 01:57:46,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 58 transitions, 255 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-19 01:57:46,376 INFO L231 Difference]: Finished difference. Result has 67 places, 48 transitions, 183 flow [2024-11-19 01:57:46,376 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=67, PETRI_TRANSITIONS=48} [2024-11-19 01:57:46,376 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 8 predicate places. [2024-11-19 01:57:46,376 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 48 transitions, 183 flow [2024-11-19 01:57:46,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:46,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:46,377 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:46,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 01:57:46,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-19 01:57:46,578 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:46,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:46,579 INFO L85 PathProgramCache]: Analyzing trace with hash 79614875, now seen corresponding path program 1 times [2024-11-19 01:57:46,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:46,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652548011] [2024-11-19 01:57:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:46,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:46,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 01:57:46,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443575519] [2024-11-19 01:57:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:46,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:46,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:46,600 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:57:46,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 01:57:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:46,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 01:57:46,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 01:57:46,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:57:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 01:57:46,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:46,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652548011] [2024-11-19 01:57:46,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 01:57:46,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443575519] [2024-11-19 01:57:46,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443575519] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 01:57:46,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 01:57:46,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-19 01:57:46,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472632743] [2024-11-19 01:57:46,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:57:46,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:57:46,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:46,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:57:46,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:57:46,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 46 [2024-11-19 01:57:46,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 48 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:46,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:46,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 46 [2024-11-19 01:57:46,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:57:49,573 INFO L124 PetriNetUnfolderBase]: 23051/31045 cut-off events. [2024-11-19 01:57:49,573 INFO L125 PetriNetUnfolderBase]: For 7504/9784 co-relation queries the response was YES. [2024-11-19 01:57:49,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72061 conditions, 31045 events. 23051/31045 cut-off events. For 7504/9784 co-relation queries the response was YES. Maximal size of possible extension queue 2042. Compared 206347 event pairs, 13017 based on Foata normal form. 1728/28352 useless extension candidates. Maximal degree in co-relation 34031. Up to 14300 conditions per place. [2024-11-19 01:57:49,828 INFO L140 encePairwiseOnDemand]: 43/46 looper letters, 31 selfloop transitions, 1 changer transitions 9/62 dead transitions. [2024-11-19 01:57:49,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 291 flow [2024-11-19 01:57:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 01:57:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 01:57:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-11-19 01:57:49,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-11-19 01:57:49,830 INFO L175 Difference]: Start difference. First operand has 67 places, 48 transitions, 183 flow. Second operand 4 states and 120 transitions. [2024-11-19 01:57:49,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 291 flow [2024-11-19 01:57:49,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 62 transitions, 280 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-19 01:57:49,968 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 162 flow [2024-11-19 01:57:49,970 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2024-11-19 01:57:49,970 INFO L277 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2024-11-19 01:57:49,970 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 162 flow [2024-11-19 01:57:49,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:49,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:49,971 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:57:49,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 01:57:50,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:50,173 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:50,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:50,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2122199866, now seen corresponding path program 1 times [2024-11-19 01:57:50,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:50,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166917639] [2024-11-19 01:57:50,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:50,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:57:50,192 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 01:57:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 01:57:50,221 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 01:57:50,221 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 01:57:50,221 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-11-19 01:57:50,221 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-11-19 01:57:50,221 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-19 01:57:50,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 01:57:50,221 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-11-19 01:57:50,222 WARN L244 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 01:57:50,222 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-11-19 01:57:50,251 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:57:50,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 54 transitions, 188 flow [2024-11-19 01:57:50,267 INFO L124 PetriNetUnfolderBase]: 12/106 cut-off events. [2024-11-19 01:57:50,267 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-19 01:57:50,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 106 events. 12/106 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 225 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 130. Up to 12 conditions per place. [2024-11-19 01:57:50,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 54 transitions, 188 flow [2024-11-19 01:57:50,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 50 transitions, 175 flow [2024-11-19 01:57:50,273 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:57:50,273 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;@1880a759, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:57:50,273 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:57:50,274 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:57:50,274 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2024-11-19 01:57:50,274 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:57:50,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:57:50,274 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-19 01:57:50,274 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:57:50,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:57:50,275 INFO L85 PathProgramCache]: Analyzing trace with hash 364599013, now seen corresponding path program 1 times [2024-11-19 01:57:50,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:57:50,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600496019] [2024-11-19 01:57:50,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:50,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:57:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-19 01:57:50,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146736683] [2024-11-19 01:57:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:57:50,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:57:50,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:57:50,290 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 01:57:50,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 01:57:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:57:50,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 01:57:50,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:57:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:57:50,364 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 01:57:50,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:57:50,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600496019] [2024-11-19 01:57:50,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-19 01:57:50,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146736683] [2024-11-19 01:57:50,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146736683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:57:50,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:57:50,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:57:50,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351294749] [2024-11-19 01:57:50,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:57:50,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 01:57:50,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:57:50,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 01:57:50,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 01:57:50,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 54 [2024-11-19 01:57:50,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 50 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 01:57:50,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:57:50,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 54 [2024-11-19 01:57:50,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand