./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-7.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/fib_unsafe-7.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 7399a2144dae504b22d3bd9a68ebd91d200de1e145cd9c7db720353ffec7d306 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 01:26:22,085 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 01:26:22,150 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-19 01:26:22,156 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 01:26:22,156 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 01:26:22,188 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 01:26:22,188 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 01:26:22,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 01:26:22,189 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 01:26:22,189 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 01:26:22,190 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 01:26:22,190 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 01:26:22,190 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 01:26:22,191 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 01:26:22,191 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 01:26:22,192 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 01:26:22,192 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 01:26:22,193 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 01:26:22,193 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 01:26:22,193 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 01:26:22,194 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 01:26:22,194 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 01:26:22,195 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 01:26:22,198 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 01:26:22,198 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 01:26:22,199 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 01:26:22,199 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 01:26:22,199 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 01:26:22,199 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 01:26:22,200 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 01:26:22,200 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 01:26:22,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 01:26:22,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:26:22,201 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 01:26:22,201 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 01:26:22,201 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 01:26:22,201 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 01:26:22,201 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 01:26:22,202 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 01:26:22,202 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 01:26:22,205 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 01:26:22,205 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 01:26:22,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7399a2144dae504b22d3bd9a68ebd91d200de1e145cd9c7db720353ffec7d306 [2024-11-19 01:26:22,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 01:26:22,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 01:26:22,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 01:26:22,532 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 01:26:22,532 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 01:26:22,533 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-7.i [2024-11-19 01:26:23,945 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 01:26:24,190 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 01:26:24,191 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-7.i [2024-11-19 01:26:24,214 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4959bf399/1f4d26aed44e44639544961978da68ba/FLAG5487f89ef [2024-11-19 01:26:24,506 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4959bf399/1f4d26aed44e44639544961978da68ba [2024-11-19 01:26:24,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 01:26:24,509 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 01:26:24,510 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 01:26:24,510 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 01:26:24,515 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 01:26:24,516 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:24,517 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dc2dda0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24, skipping insertion in model container [2024-11-19 01:26:24,517 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:24,561 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 01:26:24,866 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/fib_unsafe-7.i[30243,30256] [2024-11-19 01:26:24,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:26:24,907 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 01:26:24,947 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/fib_unsafe-7.i[30243,30256] [2024-11-19 01:26:24,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 01:26:24,994 INFO L204 MainTranslator]: Completed translation [2024-11-19 01:26:24,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24 WrapperNode [2024-11-19 01:26:24,994 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 01:26:24,995 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 01:26:24,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 01:26:24,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 01:26:25,002 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:25,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:25,042 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2024-11-19 01:26:25,042 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 01:26:25,043 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 01:26:25,043 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 01:26:25,043 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 01:26:25,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:25,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:25,058 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:25,081 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 01:26:25,084 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:25,084 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:25,088 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:25,095 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:25,099 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:25,100 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:25,107 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 01:26:25,108 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 01:26:25,108 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 01:26:25,109 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 01:26:25,109 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (1/1) ... [2024-11-19 01:26:25,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 01:26:25,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:26:25,147 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 01:26:25,157 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 01:26:25,204 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-19 01:26:25,204 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-19 01:26:25,204 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-19 01:26:25,204 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-19 01:26:25,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 01:26:25,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 01:26:25,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 01:26:25,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 01:26:25,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 01:26:25,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 01:26:25,208 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 01:26:25,398 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 01:26:25,400 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 01:26:25,558 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 01:26:25,558 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 01:26:25,649 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 01:26:25,649 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 01:26:25,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:26:25 BoogieIcfgContainer [2024-11-19 01:26:25,650 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 01:26:25,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 01:26:25,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 01:26:25,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 01:26:25,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 01:26:24" (1/3) ... [2024-11-19 01:26:25,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f7f466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:26:25, skipping insertion in model container [2024-11-19 01:26:25,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 01:26:24" (2/3) ... [2024-11-19 01:26:25,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f7f466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 01:26:25, skipping insertion in model container [2024-11-19 01:26:25,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 01:26:25" (3/3) ... [2024-11-19 01:26:25,658 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-7.i [2024-11-19 01:26:25,675 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 01:26:25,676 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-19 01:26:25,676 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 01:26:25,733 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-19 01:26:25,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2024-11-19 01:26:25,793 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-11-19 01:26:25,793 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:26:25,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-19 01:26:25,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2024-11-19 01:26:25,799 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2024-11-19 01:26:25,816 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 01:26:25,825 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;@363cd827, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 01:26:25,825 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-19 01:26:25,838 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 01:26:25,839 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-11-19 01:26:25,839 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 01:26:25,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:26:25,840 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:26:25,840 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 01:26:25,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:26:25,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1327058361, now seen corresponding path program 1 times [2024-11-19 01:26:25,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:26:25,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955488859] [2024-11-19 01:26:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:26:25,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:26:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:26:26,161 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 01:26:26,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:26:26,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955488859] [2024-11-19 01:26:26,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955488859] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 01:26:26,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 01:26:26,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 01:26:26,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529156247] [2024-11-19 01:26:26,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 01:26:26,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 01:26:26,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:26:26,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 01:26:26,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 01:26:26,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-19 01:26:26,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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 01:26:26,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:26:26,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-19 01:26:26,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:26:26,319 INFO L124 PetriNetUnfolderBase]: 115/223 cut-off events. [2024-11-19 01:26:26,319 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 01:26:26,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 223 events. 115/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 691 event pairs, 20 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 398. Up to 118 conditions per place. [2024-11-19 01:26:26,325 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2024-11-19 01:26:26,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 118 flow [2024-11-19 01:26:26,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 01:26:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 01:26:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-11-19 01:26:26,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-11-19 01:26:26,338 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 61 transitions. [2024-11-19 01:26:26,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 33 transitions, 118 flow [2024-11-19 01:26:26,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 33 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 01:26:26,344 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2024-11-19 01:26:26,346 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2024-11-19 01:26:26,350 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-11-19 01:26:26,350 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2024-11-19 01:26:26,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 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 01:26:26,351 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:26:26,351 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:26:26,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 01:26:26,352 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 01:26:26,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:26:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1785420741, now seen corresponding path program 1 times [2024-11-19 01:26:26,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:26:26,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31398326] [2024-11-19 01:26:26,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:26:26,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:26:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:26:26,483 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 01:26:26,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:26:26,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31398326] [2024-11-19 01:26:26,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31398326] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:26:26,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966002652] [2024-11-19 01:26:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:26:26,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:26,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:26:26,486 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 01:26:26,493 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 01:26:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:26:26,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 01:26:26,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:26:26,649 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 01:26:26,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:26:26,674 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 01:26:26,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966002652] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:26:26,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:26:26,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-19 01:26:26,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491734075] [2024-11-19 01:26:26,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:26:26,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 01:26:26,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:26:26,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 01:26:26,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-19 01:26:26,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-19 01:26:26,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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 01:26:26,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:26:26,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-19 01:26:26,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:26:26,849 INFO L124 PetriNetUnfolderBase]: 151/277 cut-off events. [2024-11-19 01:26:26,849 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 01:26:26,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 277 events. 151/277 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 799 event pairs, 20 based on Foata normal form. 0/254 useless extension candidates. Maximal degree in co-relation 569. Up to 91 conditions per place. [2024-11-19 01:26:26,857 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 38 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-11-19 01:26:26,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 212 flow [2024-11-19 01:26:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 01:26:26,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 01:26:26,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-11-19 01:26:26,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2024-11-19 01:26:26,860 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 118 transitions. [2024-11-19 01:26:26,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 212 flow [2024-11-19 01:26:26,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 210 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 01:26:26,862 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2024-11-19 01:26:26,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-11-19 01:26:26,863 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-11-19 01:26:26,864 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2024-11-19 01:26:26,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 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 01:26:26,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:26:26,866 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:26:26,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 01:26:27,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:27,067 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 01:26:27,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:26:27,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1099178439, now seen corresponding path program 2 times [2024-11-19 01:26:27,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:26:27,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877354597] [2024-11-19 01:26:27,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:26:27,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:26:27,107 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:26:27,108 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:26:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:27,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:26:27,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877354597] [2024-11-19 01:26:27,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877354597] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:26:27,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498586860] [2024-11-19 01:26:27,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 01:26:27,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:27,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:26:27,249 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 01:26:27,252 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 01:26:27,347 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 01:26:27,348 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:26:27,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 01:26:27,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:26:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:27,380 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:26:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:27,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498586860] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:26:27,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:26:27,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-19 01:26:27,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547132423] [2024-11-19 01:26:27,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:26:27,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 01:26:27,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:26:27,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 01:26:27,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-19 01:26:27,461 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-19 01:26:27,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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 01:26:27,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:26:27,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-19 01:26:27,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:26:27,667 INFO L124 PetriNetUnfolderBase]: 259/439 cut-off events. [2024-11-19 01:26:27,668 INFO L125 PetriNetUnfolderBase]: For 207/207 co-relation queries the response was YES. [2024-11-19 01:26:27,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 439 events. 259/439 cut-off events. For 207/207 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1196 event pairs, 20 based on Foata normal form. 54/479 useless extension candidates. Maximal degree in co-relation 1091. Up to 109 conditions per place. [2024-11-19 01:26:27,680 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 74 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2024-11-19 01:26:27,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 95 transitions, 426 flow [2024-11-19 01:26:27,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 01:26:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 01:26:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-11-19 01:26:27,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6752873563218391 [2024-11-19 01:26:27,686 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 235 transitions. [2024-11-19 01:26:27,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 95 transitions, 426 flow [2024-11-19 01:26:27,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 412 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-19 01:26:27,695 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2024-11-19 01:26:27,696 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2024-11-19 01:26:27,697 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2024-11-19 01:26:27,697 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2024-11-19 01:26:27,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 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 01:26:27,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:26:27,698 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:26:27,716 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 01:26:27,899 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 01:26:27,899 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:26:27,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:26:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash -299417337, now seen corresponding path program 3 times [2024-11-19 01:26:27,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:26:27,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821002705] [2024-11-19 01:26:27,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:26:27,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:26:27,955 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-19 01:26:27,956 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:26:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:28,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:26:28,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821002705] [2024-11-19 01:26:28,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821002705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:26:28,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744798744] [2024-11-19 01:26:28,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 01:26:28,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:28,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:26:28,177 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 01:26:28,178 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 01:26:28,258 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-19 01:26:28,259 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:26:28,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 01:26:28,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:26:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:28,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:26:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:28,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744798744] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:26:28,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:26:28,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2024-11-19 01:26:28,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812742626] [2024-11-19 01:26:28,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:26:28,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 01:26:28,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:26:28,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 01:26:28,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2024-11-19 01:26:28,498 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-11-19 01:26:28,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 19 states, 19 states have (on average 13.421052631578947) internal successors, (255), 19 states have internal predecessors, (255), 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 01:26:28,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:26:28,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-11-19 01:26:28,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:26:28,763 INFO L124 PetriNetUnfolderBase]: 367/601 cut-off events. [2024-11-19 01:26:28,763 INFO L125 PetriNetUnfolderBase]: For 2259/2259 co-relation queries the response was YES. [2024-11-19 01:26:28,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1756 conditions, 601 events. 367/601 cut-off events. For 2259/2259 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1598 event pairs, 20 based on Foata normal form. 54/641 useless extension candidates. Maximal degree in co-relation 1730. Up to 136 conditions per place. [2024-11-19 01:26:28,770 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 110 selfloop transitions, 17 changer transitions 0/137 dead transitions. [2024-11-19 01:26:28,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 137 transitions, 664 flow [2024-11-19 01:26:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 01:26:28,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-19 01:26:28,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 349 transitions. [2024-11-19 01:26:28,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6685823754789272 [2024-11-19 01:26:28,773 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 18 states and 349 transitions. [2024-11-19 01:26:28,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 137 transitions, 664 flow [2024-11-19 01:26:28,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 137 transitions, 604 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-11-19 01:26:28,787 INFO L231 Difference]: Finished difference. Result has 71 places, 41 transitions, 218 flow [2024-11-19 01:26:28,788 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=218, PETRI_PLACES=71, PETRI_TRANSITIONS=41} [2024-11-19 01:26:28,789 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2024-11-19 01:26:28,790 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 41 transitions, 218 flow [2024-11-19 01:26:28,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.421052631578947) internal successors, (255), 19 states have internal predecessors, (255), 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 01:26:28,790 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:26:28,791 INFO L204 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:26:28,808 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 01:26:28,994 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 01:26:28,995 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:26:28,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:26:28,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1866854471, now seen corresponding path program 4 times [2024-11-19 01:26:28,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:26:28,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732292823] [2024-11-19 01:26:28,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:26:28,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:26:29,049 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:26:29,049 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:26:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:30,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:26:30,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732292823] [2024-11-19 01:26:30,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732292823] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:26:30,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247787034] [2024-11-19 01:26:30,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 01:26:30,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:30,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:26:30,266 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 01:26:30,269 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 01:26:30,355 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 01:26:30,355 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 01:26:30,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-19 01:26:30,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:26:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:31,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:26:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:32,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247787034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:26:32,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:26:32,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2024-11-19 01:26:32,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186067100] [2024-11-19 01:26:32,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:26:32,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-19 01:26:32,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:26:32,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-19 01:26:32,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=3970, Unknown=0, NotChecked=0, Total=4556 [2024-11-19 01:26:33,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-19 01:26:33,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 41 transitions, 218 flow. Second operand has 68 states, 68 states have (on average 6.235294117647059) internal successors, (424), 68 states have internal predecessors, (424), 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 01:26:33,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:26:33,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-19 01:26:33,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 01:26:56,976 INFO L124 PetriNetUnfolderBase]: 18955/31127 cut-off events. [2024-11-19 01:26:56,976 INFO L125 PetriNetUnfolderBase]: For 79522/79522 co-relation queries the response was YES. [2024-11-19 01:26:57,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84403 conditions, 31127 events. 18955/31127 cut-off events. For 79522/79522 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 205011 event pairs, 106 based on Foata normal form. 0/30757 useless extension candidates. Maximal degree in co-relation 84369. Up to 3960 conditions per place. [2024-11-19 01:26:57,191 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 643 selfloop transitions, 721 changer transitions 789/2156 dead transitions. [2024-11-19 01:26:57,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 2156 transitions, 13373 flow [2024-11-19 01:26:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2024-11-19 01:26:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2024-11-19 01:26:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 2631 transitions. [2024-11-19 01:26:57,201 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46052861893926134 [2024-11-19 01:26:57,201 INFO L175 Difference]: Start difference. First operand has 71 places, 41 transitions, 218 flow. Second operand 197 states and 2631 transitions. [2024-11-19 01:26:57,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 2156 transitions, 13373 flow [2024-11-19 01:26:57,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 2156 transitions, 11207 flow, removed 722 selfloop flow, removed 11 redundant places. [2024-11-19 01:26:57,403 INFO L231 Difference]: Finished difference. Result has 334 places, 822 transitions, 4968 flow [2024-11-19 01:26:57,403 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=197, PETRI_FLOW=4968, PETRI_PLACES=334, PETRI_TRANSITIONS=822} [2024-11-19 01:26:57,404 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2024-11-19 01:26:57,404 INFO L471 AbstractCegarLoop]: Abstraction has has 334 places, 822 transitions, 4968 flow [2024-11-19 01:26:57,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 6.235294117647059) internal successors, (424), 68 states have internal predecessors, (424), 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 01:26:57,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 01:26:57,405 INFO L204 CegarLoopForPetriNet]: trace histogram [16, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 01:26:57,420 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 01:26:57,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:57,610 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-19 01:26:57,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 01:26:57,610 INFO L85 PathProgramCache]: Analyzing trace with hash -785007143, now seen corresponding path program 1 times [2024-11-19 01:26:57,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 01:26:57,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372970912] [2024-11-19 01:26:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:26:57,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 01:26:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:26:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:58,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 01:26:58,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372970912] [2024-11-19 01:26:58,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372970912] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 01:26:58,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844442718] [2024-11-19 01:26:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 01:26:58,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 01:26:58,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 01:26:58,811 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 01:26:58,812 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 01:26:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 01:26:58,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-19 01:26:58,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 01:26:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 105 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:26:59,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 01:27:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 01:27:01,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844442718] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 01:27:01,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 01:27:01,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2024-11-19 01:27:01,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020420909] [2024-11-19 01:27:01,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 01:27:01,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-19 01:27:01,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 01:27:01,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-19 01:27:01,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=4750, Unknown=0, NotChecked=0, Total=5402 [2024-11-19 01:27:01,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-11-19 01:27:01,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 822 transitions, 4968 flow. Second operand has 74 states, 74 states have (on average 6.297297297297297) internal successors, (466), 74 states have internal predecessors, (466), 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 01:27:01,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 01:27:01,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-11-19 01:27:01,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand