./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 798a7b37 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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-11.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 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 01:59:41,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 01:59:41,315 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-04 01:59:41,319 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 01:59:41,319 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 01:59:41,333 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 01:59:41,335 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 01:59:41,335 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 01:59:41,336 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 01:59:41,336 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 01:59:41,336 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 01:59:41,336 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 01:59:41,337 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 01:59:41,337 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 01:59:41,337 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 01:59:41,337 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 01:59:41,337 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 01:59:41,337 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 01:59:41,337 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 01:59:41,337 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 01:59:41,337 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 01:59:41,338 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 01:59:41,338 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 01:59:41,338 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 01:59:41,338 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 01:59:41,338 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 01:59:41,338 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 01:59:41,338 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 01:59:41,338 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 01:59:41,338 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 01:59:41,338 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 01:59:41,338 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 01:59:41,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 01:59:41,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 01:59:41,339 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 01:59:41,339 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 01:59:41,339 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 01:59:41,339 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 01:59:41,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 01:59:41,339 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 01:59:41,339 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 01:59:41,339 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 01:59:41,339 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 01:59:41,339 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> 5b16c68af06359cf155927d2335a825cd179e6a83a999e1ead7a6952268e92c6 [2025-03-04 01:59:41,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 01:59:41,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 01:59:41,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 01:59:41,615 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 01:59:41,615 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 01:59:41,617 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-11.i [2025-03-04 01:59:42,764 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfa456b3d/5db55dc19e524a5c814cca79ba04a5e9/FLAGed5bcf965 [2025-03-04 01:59:43,059 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 01:59:43,060 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-11.i [2025-03-04 01:59:43,070 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfa456b3d/5db55dc19e524a5c814cca79ba04a5e9/FLAGed5bcf965 [2025-03-04 01:59:43,082 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfa456b3d/5db55dc19e524a5c814cca79ba04a5e9 [2025-03-04 01:59:43,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 01:59:43,085 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 01:59:43,086 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 01:59:43,086 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 01:59:43,088 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 01:59:43,089 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,090 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a855096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43, skipping insertion in model container [2025-03-04 01:59:43,090 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,108 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 01:59:43,287 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-11.i[30243,30256] [2025-03-04 01:59:43,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 01:59:43,316 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 01:59:43,348 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-11.i[30243,30256] [2025-03-04 01:59:43,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 01:59:43,379 INFO L204 MainTranslator]: Completed translation [2025-03-04 01:59:43,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43 WrapperNode [2025-03-04 01:59:43,380 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 01:59:43,381 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 01:59:43,381 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 01:59:43,381 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 01:59:43,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,393 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,405 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-03-04 01:59:43,405 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 01:59:43,405 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 01:59:43,406 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 01:59:43,406 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 01:59:43,410 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,411 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,412 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,423 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]. [2025-03-04 01:59:43,424 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,424 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,427 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,429 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,430 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,431 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,432 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 01:59:43,435 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 01:59:43,435 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 01:59:43,435 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 01:59:43,436 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (1/1) ... [2025-03-04 01:59:43,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 01:59:43,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:43,458 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) [2025-03-04 01:59:43,460 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 [2025-03-04 01:59:43,476 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-04 01:59:43,477 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-04 01:59:43,477 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-04 01:59:43,477 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-04 01:59:43,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-04 01:59:43,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 01:59:43,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 01:59:43,477 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-04 01:59:43,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 01:59:43,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 01:59:43,478 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 01:59:43,583 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 01:59:43,584 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 01:59:43,729 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 01:59:43,729 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 01:59:43,803 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 01:59:43,803 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 01:59:43,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 01:59:43 BoogieIcfgContainer [2025-03-04 01:59:43,804 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 01:59:43,806 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 01:59:43,806 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 01:59:43,811 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 01:59:43,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 01:59:43" (1/3) ... [2025-03-04 01:59:43,812 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bdd770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 01:59:43, skipping insertion in model container [2025-03-04 01:59:43,812 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 01:59:43" (2/3) ... [2025-03-04 01:59:43,813 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bdd770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 01:59:43, skipping insertion in model container [2025-03-04 01:59:43,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 01:59:43" (3/3) ... [2025-03-04 01:59:43,814 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-11.i [2025-03-04 01:59:43,827 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 01:59:43,828 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-11.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-04 01:59:43,829 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 01:59:43,864 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-04 01:59:43,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2025-03-04 01:59:43,909 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-03-04 01:59:43,915 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 01:59:43,917 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 31 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. [2025-03-04 01:59:43,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2025-03-04 01:59:43,921 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2025-03-04 01:59:43,930 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 01:59:43,938 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;@24d0cda3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 01:59:43,939 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-04 01:59:43,946 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 01:59:43,946 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-03-04 01:59:43,946 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 01:59:43,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:43,947 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:43,947 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:43,951 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:43,951 INFO L85 PathProgramCache]: Analyzing trace with hash -412560026, now seen corresponding path program 1 times [2025-03-04 01:59:43,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:43,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114449259] [2025-03-04 01:59:43,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 01:59:43,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:44,025 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-04 01:59:44,042 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-04 01:59:44,043 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 01:59:44,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:44,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:44,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114449259] [2025-03-04 01:59:44,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114449259] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 01:59:44,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 01:59:44,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 01:59:44,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258566456] [2025-03-04 01:59:44,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 01:59:44,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 01:59:44,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:44,183 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 01:59:44,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 01:59:44,185 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:44,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 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) [2025-03-04 01:59:44,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:44,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:44,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:44,321 INFO L124 PetriNetUnfolderBase]: 233/410 cut-off events. [2025-03-04 01:59:44,322 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-04 01:59:44,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 781 conditions, 410 events. 233/410 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1576 event pairs, 39 based on Foata normal form. 16/389 useless extension candidates. Maximal degree in co-relation 765. Up to 257 conditions per place. [2025-03-04 01:59:44,326 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2025-03-04 01:59:44,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 136 flow [2025-03-04 01:59:44,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 01:59:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 01:59:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-03-04 01:59:44,334 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-03-04 01:59:44,335 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 53 transitions. [2025-03-04 01:59:44,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 136 flow [2025-03-04 01:59:44,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 01:59:44,341 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2025-03-04 01:59:44,343 INFO L262 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} [2025-03-04 01:59:44,345 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-03-04 01:59:44,346 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2025-03-04 01:59:44,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 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) [2025-03-04 01:59:44,347 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:44,347 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:44,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 01:59:44,348 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:44,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:44,349 INFO L85 PathProgramCache]: Analyzing trace with hash 103279624, now seen corresponding path program 1 times [2025-03-04 01:59:44,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:44,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428132965] [2025-03-04 01:59:44,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 01:59:44,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:44,361 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 01:59:44,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 01:59:44,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 01:59:44,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:44,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:44,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428132965] [2025-03-04 01:59:44,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428132965] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:44,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761093016] [2025-03-04 01:59:44,416 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 01:59:44,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:44,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:44,418 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) [2025-03-04 01:59:44,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 01:59:44,461 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 01:59:44,476 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 01:59:44,476 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 01:59:44,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:44,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-04 01:59:44,480 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:44,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:44,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761093016] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:44,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:44,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-04 01:59:44,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244810241] [2025-03-04 01:59:44,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:44,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-04 01:59:44,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:44,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-04 01:59:44,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-04 01:59:44,530 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:44,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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) [2025-03-04 01:59:44,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:44,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:44,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:44,660 INFO L124 PetriNetUnfolderBase]: 297/506 cut-off events. [2025-03-04 01:59:44,662 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 01:59:44,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1086 conditions, 506 events. 297/506 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1880 event pairs, 39 based on Foata normal form. 0/469 useless extension candidates. Maximal degree in co-relation 1069. Up to 209 conditions per place. [2025-03-04 01:59:44,667 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-03-04 01:59:44,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 254 flow [2025-03-04 01:59:44,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 01:59:44,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-04 01:59:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-03-04 01:59:44,669 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2025-03-04 01:59:44,669 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 101 transitions. [2025-03-04 01:59:44,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 254 flow [2025-03-04 01:59:44,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 01:59:44,671 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2025-03-04 01:59:44,672 INFO L262 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} [2025-03-04 01:59:44,673 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-03-04 01:59:44,673 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2025-03-04 01:59:44,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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) [2025-03-04 01:59:44,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:44,674 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:44,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-04 01:59:44,878 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 [2025-03-04 01:59:44,878 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:44,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash 701132262, now seen corresponding path program 2 times [2025-03-04 01:59:44,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:44,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881240454] [2025-03-04 01:59:44,880 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 01:59:44,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:44,892 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-04 01:59:44,913 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 01:59:44,918 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 01:59:44,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:45,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:45,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:45,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881240454] [2025-03-04 01:59:45,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881240454] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:45,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467275927] [2025-03-04 01:59:45,012 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 01:59:45,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:45,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:45,014 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) [2025-03-04 01:59:45,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 01:59:45,055 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-04 01:59:45,074 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 01:59:45,074 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 01:59:45,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:45,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 01:59:45,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:45,096 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:45,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467275927] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:45,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:45,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-04 01:59:45,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479807447] [2025-03-04 01:59:45,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:45,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-04 01:59:45,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:45,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-04 01:59:45,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-04 01:59:45,176 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:45,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 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) [2025-03-04 01:59:45,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:45,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:45,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:45,369 INFO L124 PetriNetUnfolderBase]: 489/794 cut-off events. [2025-03-04 01:59:45,369 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-03-04 01:59:45,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 794 events. 489/794 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2900 event pairs, 39 based on Foata normal form. 96/869 useless extension candidates. Maximal degree in co-relation 1997. Up to 209 conditions per place. [2025-03-04 01:59:45,375 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 99 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2025-03-04 01:59:45,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 516 flow [2025-03-04 01:59:45,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 01:59:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-04 01:59:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2025-03-04 01:59:45,378 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2025-03-04 01:59:45,379 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 200 transitions. [2025-03-04 01:59:45,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 516 flow [2025-03-04 01:59:45,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-04 01:59:45,383 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2025-03-04 01:59:45,383 INFO L262 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} [2025-03-04 01:59:45,383 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-03-04 01:59:45,383 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2025-03-04 01:59:45,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 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) [2025-03-04 01:59:45,384 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:45,384 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:45,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-04 01:59:45,584 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 [2025-03-04 01:59:45,585 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:45,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:45,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1268144806, now seen corresponding path program 3 times [2025-03-04 01:59:45,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:45,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677869489] [2025-03-04 01:59:45,585 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 01:59:45,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:45,592 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-04 01:59:45,615 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-04 01:59:45,615 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-04 01:59:45,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:45,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:45,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677869489] [2025-03-04 01:59:45,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677869489] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:45,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299778467] [2025-03-04 01:59:45,799 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 01:59:45,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:45,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:45,801 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) [2025-03-04 01:59:45,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 01:59:45,840 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-04 01:59:45,861 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-04 01:59:45,861 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-04 01:59:45,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:45,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 01:59:45,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:45,889 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:46,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299778467] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:46,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:46,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-04 01:59:46,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710941608] [2025-03-04 01:59:46,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:46,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-04 01:59:46,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:46,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-04 01:59:46,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-04 01:59:46,089 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:46,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 states have internal predecessors, (210), 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) [2025-03-04 01:59:46,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:46,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:46,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:46,550 INFO L124 PetriNetUnfolderBase]: 873/1370 cut-off events. [2025-03-04 01:59:46,550 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2025-03-04 01:59:46,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4025 conditions, 1370 events. 873/1370 cut-off events. For 7468/7468 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4946 event pairs, 39 based on Foata normal form. 192/1541 useless extension candidates. Maximal degree in co-relation 3997. Up to 337 conditions per place. [2025-03-04 01:59:46,563 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 195 selfloop transitions, 23 changer transitions 0/223 dead transitions. [2025-03-04 01:59:46,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 223 transitions, 1054 flow [2025-03-04 01:59:46,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-04 01:59:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-04 01:59:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 398 transitions. [2025-03-04 01:59:46,566 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5718390804597702 [2025-03-04 01:59:46,566 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 24 states and 398 transitions. [2025-03-04 01:59:46,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 223 transitions, 1054 flow [2025-03-04 01:59:46,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 223 transitions, 982 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-03-04 01:59:46,581 INFO L231 Difference]: Finished difference. Result has 83 places, 47 transitions, 290 flow [2025-03-04 01:59:46,581 INFO L262 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=24, PETRI_FLOW=290, PETRI_PLACES=83, PETRI_TRANSITIONS=47} [2025-03-04 01:59:46,582 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2025-03-04 01:59:46,582 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 47 transitions, 290 flow [2025-03-04 01:59:46,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 states have internal predecessors, (210), 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) [2025-03-04 01:59:46,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:46,583 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:46,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 01:59:46,783 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 [2025-03-04 01:59:46,783 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:46,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:46,785 INFO L85 PathProgramCache]: Analyzing trace with hash 167543846, now seen corresponding path program 4 times [2025-03-04 01:59:46,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:46,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401380341] [2025-03-04 01:59:46,785 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 01:59:46,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:46,793 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-04 01:59:46,812 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-04 01:59:46,813 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 01:59:46,813 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:47,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:47,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401380341] [2025-03-04 01:59:47,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401380341] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:47,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48524468] [2025-03-04 01:59:47,275 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 01:59:47,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:47,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:47,282 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) [2025-03-04 01:59:47,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 01:59:47,330 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-04 01:59:47,359 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-04 01:59:47,359 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-04 01:59:47,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:47,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-04 01:59:47,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:47,415 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:47,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48524468] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:47,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:47,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 26 [2025-03-04 01:59:47,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816604951] [2025-03-04 01:59:47,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:47,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-04 01:59:47,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:47,711 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-04 01:59:47,711 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2025-03-04 01:59:47,712 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-04 01:59:47,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 47 transitions, 290 flow. Second operand has 26 states, 26 states have (on average 8.384615384615385) internal successors, (218), 26 states have internal predecessors, (218), 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) [2025-03-04 01:59:47,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:47,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-04 01:59:47,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 01:59:48,127 INFO L124 PetriNetUnfolderBase]: 937/1466 cut-off events. [2025-03-04 01:59:48,128 INFO L125 PetriNetUnfolderBase]: For 9868/9868 co-relation queries the response was YES. [2025-03-04 01:59:48,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4517 conditions, 1466 events. 937/1466 cut-off events. For 9868/9868 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5342 event pairs, 39 based on Foata normal form. 32/1477 useless extension candidates. Maximal degree in co-relation 4477. Up to 273 conditions per place. [2025-03-04 01:59:48,143 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 211 selfloop transitions, 25 changer transitions 0/241 dead transitions. [2025-03-04 01:59:48,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 241 transitions, 1162 flow [2025-03-04 01:59:48,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-04 01:59:48,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-04 01:59:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 420 transitions. [2025-03-04 01:59:48,147 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5570291777188329 [2025-03-04 01:59:48,148 INFO L175 Difference]: Start difference. First operand has 83 places, 47 transitions, 290 flow. Second operand 26 states and 420 transitions. [2025-03-04 01:59:48,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 241 transitions, 1162 flow [2025-03-04 01:59:48,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 241 transitions, 1062 flow, removed 39 selfloop flow, removed 11 redundant places. [2025-03-04 01:59:48,167 INFO L231 Difference]: Finished difference. Result has 99 places, 49 transitions, 266 flow [2025-03-04 01:59:48,167 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=266, PETRI_PLACES=99, PETRI_TRANSITIONS=49} [2025-03-04 01:59:48,169 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2025-03-04 01:59:48,169 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 49 transitions, 266 flow [2025-03-04 01:59:48,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.384615384615385) internal successors, (218), 26 states have internal predecessors, (218), 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) [2025-03-04 01:59:48,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 01:59:48,169 INFO L206 CegarLoopForPetriNet]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 01:59:48,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-04 01:59:48,370 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 [2025-03-04 01:59:48,370 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-04 01:59:48,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 01:59:48,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1951487898, now seen corresponding path program 5 times [2025-03-04 01:59:48,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 01:59:48,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769739626] [2025-03-04 01:59:48,371 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 01:59:48,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 01:59:48,380 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 13 equivalence classes. [2025-03-04 01:59:48,484 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 01:59:48,485 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-04 01:59:48,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:49,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 01:59:49,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769739626] [2025-03-04 01:59:49,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769739626] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 01:59:49,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252032806] [2025-03-04 01:59:49,931 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 01:59:49,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 01:59:49,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 01:59:49,934 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) [2025-03-04 01:59:49,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 01:59:49,970 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 13 equivalence classes. [2025-03-04 01:59:50,000 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 01:59:50,000 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2025-03-04 01:59:50,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 01:59:50,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 83 conjuncts are in the unsatisfiable core [2025-03-04 01:59:50,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 01:59:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 253 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:51,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 01:59:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 01:59:53,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252032806] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 01:59:53,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 01:59:53,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 90 [2025-03-04 01:59:53,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672758057] [2025-03-04 01:59:53,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 01:59:53,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2025-03-04 01:59:53,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 01:59:53,199 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2025-03-04 01:59:53,201 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1164, Invalid=7026, Unknown=0, NotChecked=0, Total=8190 [2025-03-04 01:59:53,236 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-04 01:59:53,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 49 transitions, 266 flow. Second operand has 91 states, 91 states have (on average 6.175824175824176) internal successors, (562), 91 states have internal predecessors, (562), 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) [2025-03-04 01:59:53,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 01:59:53,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-04 01:59:53,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand