./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_unsafe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8ab0bd5 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-12.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 0d5255e9cc8ffb776115e75fa8fa1fa6c2774a79275dfd8235c357288b00417c --- Real Ultimate output --- This is Ultimate 0.3.0-?-f8ab0bd-m [2025-03-13 21:24:08,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-13 21:24:08,154 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-13 21:24:08,160 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-13 21:24:08,160 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-13 21:24:08,178 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-13 21:24:08,178 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-13 21:24:08,179 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-13 21:24:08,179 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-13 21:24:08,179 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-13 21:24:08,179 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-13 21:24:08,179 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-13 21:24:08,179 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-13 21:24:08,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-13 21:24:08,179 INFO L153 SettingsManager]: * Use SBE=true [2025-03-13 21:24:08,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-13 21:24:08,180 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-13 21:24:08,180 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-13 21:24:08,181 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-13 21:24:08,181 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-13 21:24:08,181 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-13 21:24:08,181 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-13 21:24:08,182 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-13 21:24:08,182 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-13 21:24:08,182 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-13 21:24:08,182 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-13 21:24:08,182 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-13 21:24:08,182 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-13 21:24:08,182 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-13 21:24:08,182 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-13 21:24:08,183 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-13 21:24:08,183 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-13 21:24:08,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:24:08,183 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-13 21:24:08,183 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-13 21:24:08,183 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-13 21:24:08,183 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-13 21:24:08,183 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-13 21:24:08,183 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-13 21:24:08,183 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-13 21:24:08,183 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-13 21:24:08,183 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-13 21:24:08,183 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-13 21:24:08,184 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 -> 0d5255e9cc8ffb776115e75fa8fa1fa6c2774a79275dfd8235c357288b00417c [2025-03-13 21:24:08,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-13 21:24:08,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-13 21:24:08,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-13 21:24:08,437 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-13 21:24:08,437 INFO L274 PluginConnector]: CDTParser initialized [2025-03-13 21:24:08,438 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_unsafe-12.i [2025-03-13 21:24:09,572 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94e301d78/aeb8d9b6cfec440fa52715845629ee72/FLAGdf854118b [2025-03-13 21:24:09,854 INFO L384 CDTParser]: Found 1 translation units. [2025-03-13 21:24:09,854 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_unsafe-12.i [2025-03-13 21:24:09,863 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94e301d78/aeb8d9b6cfec440fa52715845629ee72/FLAGdf854118b [2025-03-13 21:24:10,159 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94e301d78/aeb8d9b6cfec440fa52715845629ee72 [2025-03-13 21:24:10,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-13 21:24:10,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-13 21:24:10,164 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-13 21:24:10,164 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-13 21:24:10,167 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-13 21:24:10,167 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d6cf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10, skipping insertion in model container [2025-03-13 21:24:10,168 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,185 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-13 21:24:10,360 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-12.i[30243,30256] [2025-03-13 21:24:10,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:24:10,380 INFO L200 MainTranslator]: Completed pre-run [2025-03-13 21:24:10,407 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-12.i[30243,30256] [2025-03-13 21:24:10,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-13 21:24:10,438 INFO L204 MainTranslator]: Completed translation [2025-03-13 21:24:10,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10 WrapperNode [2025-03-13 21:24:10,439 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-13 21:24:10,439 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-13 21:24:10,439 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-13 21:24:10,440 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-13 21:24:10,443 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,450 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,460 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-03-13 21:24:10,461 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-13 21:24:10,461 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-13 21:24:10,461 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-13 21:24:10,461 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-13 21:24:10,466 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,469 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,480 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]. [2025-03-13 21:24:10,480 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,480 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,483 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,483 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,484 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,484 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-13 21:24:10,486 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-13 21:24:10,486 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-13 21:24:10,486 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-13 21:24:10,487 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (1/1) ... [2025-03-13 21:24:10,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-13 21:24:10,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:24:10,509 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) [2025-03-13 21:24:10,511 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 [2025-03-13 21:24:10,527 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-13 21:24:10,528 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-13 21:24:10,528 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-13 21:24:10,528 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-13 21:24:10,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-13 21:24:10,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-13 21:24:10,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-13 21:24:10,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-13 21:24:10,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-13 21:24:10,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-13 21:24:10,529 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-13 21:24:10,624 INFO L256 CfgBuilder]: Building ICFG [2025-03-13 21:24:10,626 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-13 21:24:10,768 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-13 21:24:10,769 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-13 21:24:10,769 INFO L318 CfgBuilder]: Performing block encoding [2025-03-13 21:24:10,864 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-13 21:24:10,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:24:10 BoogieIcfgContainer [2025-03-13 21:24:10,865 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-13 21:24:10,867 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-13 21:24:10,867 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-13 21:24:10,872 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-13 21:24:10,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.03 09:24:10" (1/3) ... [2025-03-13 21:24:10,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b3f54f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:24:10, skipping insertion in model container [2025-03-13 21:24:10,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.03 09:24:10" (2/3) ... [2025-03-13 21:24:10,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b3f54f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.03 09:24:10, skipping insertion in model container [2025-03-13 21:24:10,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.03 09:24:10" (3/3) ... [2025-03-13 21:24:10,873 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-12.i [2025-03-13 21:24:10,886 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-13 21:24:10,887 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-12.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-03-13 21:24:10,888 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-13 21:24:10,928 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-13 21:24:10,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2025-03-13 21:24:10,986 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-03-13 21:24:10,988 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-13 21:24:10,990 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. [2025-03-13 21:24:10,990 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2025-03-13 21:24:10,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2025-03-13 21:24:11,004 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-13 21:24:11,017 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;@38e84e5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-13 21:24:11,017 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-03-13 21:24:11,028 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-13 21:24:11,029 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-03-13 21:24:11,029 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-13 21:24:11,029 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:24:11,030 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:24:11,030 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:24:11,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:24:11,035 INFO L85 PathProgramCache]: Analyzing trace with hash -411636505, now seen corresponding path program 1 times [2025-03-13 21:24:11,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:24:11,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228266261] [2025-03-13 21:24:11,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:24:11,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:24:11,109 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-13 21:24:11,129 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-13 21:24:11,129 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:24:11,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:24:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:11,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:24:11,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228266261] [2025-03-13 21:24:11,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228266261] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-13 21:24:11,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-13 21:24:11,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-13 21:24:11,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949734814] [2025-03-13 21:24:11,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-13 21:24:11,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-13 21:24:11,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:24:11,270 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-13 21:24:11,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-13 21:24:11,273 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-13 21:24:11,275 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) [2025-03-13 21:24:11,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:24:11,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-13 21:24:11,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:24:11,417 INFO L124 PetriNetUnfolderBase]: 233/410 cut-off events. [2025-03-13 21:24:11,417 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2025-03-13 21:24:11,418 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. [2025-03-13 21:24:11,421 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2025-03-13 21:24:11,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 136 flow [2025-03-13 21:24:11,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-13 21:24:11,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-13 21:24:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-03-13 21:24:11,431 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-03-13 21:24:11,432 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 53 transitions. [2025-03-13 21:24:11,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 136 flow [2025-03-13 21:24:11,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-13 21:24:11,438 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2025-03-13 21:24:11,439 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} [2025-03-13 21:24:11,442 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-03-13 21:24:11,442 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2025-03-13 21:24:11,442 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) [2025-03-13 21:24:11,442 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:24:11,442 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:24:11,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-13 21:24:11,443 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:24:11,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:24:11,443 INFO L85 PathProgramCache]: Analyzing trace with hash 75573994, now seen corresponding path program 1 times [2025-03-13 21:24:11,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:24:11,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58857825] [2025-03-13 21:24:11,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:24:11,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:24:11,458 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-13 21:24:11,465 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-13 21:24:11,465 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:24:11,465 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:24:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:11,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:24:11,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58857825] [2025-03-13 21:24:11,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58857825] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:24:11,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586292760] [2025-03-13 21:24:11,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:24:11,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:24:11,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:24:11,522 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) [2025-03-13 21:24:11,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-13 21:24:11,576 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-13 21:24:11,591 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-13 21:24:11,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:24:11,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:24:11,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-13 21:24:11,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:24:11,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:11,618 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:24:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:11,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586292760] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:24:11,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:24:11,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-13 21:24:11,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151156665] [2025-03-13 21:24:11,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:24:11,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-13 21:24:11,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:24:11,640 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-13 21:24:11,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-03-13 21:24:11,641 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-13 21:24:11,641 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) [2025-03-13 21:24:11,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:24:11,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-13 21:24:11,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:24:11,760 INFO L124 PetriNetUnfolderBase]: 297/506 cut-off events. [2025-03-13 21:24:11,760 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-13 21:24:11,761 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. [2025-03-13 21:24:11,764 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-03-13 21:24:11,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 254 flow [2025-03-13 21:24:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-13 21:24:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-13 21:24:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-03-13 21:24:11,765 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2025-03-13 21:24:11,765 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 101 transitions. [2025-03-13 21:24:11,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 254 flow [2025-03-13 21:24:11,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-13 21:24:11,766 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2025-03-13 21:24:11,767 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} [2025-03-13 21:24:11,767 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-03-13 21:24:11,767 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2025-03-13 21:24:11,767 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) [2025-03-13 21:24:11,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:24:11,768 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:24:11,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-13 21:24:11,972 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 [2025-03-13 21:24:11,972 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:24:11,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:24:11,973 INFO L85 PathProgramCache]: Analyzing trace with hash -149432921, now seen corresponding path program 2 times [2025-03-13 21:24:11,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:24:11,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544448499] [2025-03-13 21:24:11,973 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:24:11,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:24:11,980 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-13 21:24:11,998 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-13 21:24:11,998 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:24:11,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:24:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:12,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:24:12,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544448499] [2025-03-13 21:24:12,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544448499] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:24:12,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274474638] [2025-03-13 21:24:12,099 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-13 21:24:12,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:24:12,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:24:12,101 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) [2025-03-13 21:24:12,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-13 21:24:12,139 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-03-13 21:24:12,152 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-03-13 21:24:12,153 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-13 21:24:12,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:24:12,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-13 21:24:12,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:24:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:12,192 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:24:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:12,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274474638] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:24:12,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:24:12,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-13 21:24:12,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880972481] [2025-03-13 21:24:12,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:24:12,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-13 21:24:12,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:24:12,249 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-13 21:24:12,249 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-03-13 21:24:12,249 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-13 21:24:12,250 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) [2025-03-13 21:24:12,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:24:12,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-13 21:24:12,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:24:12,410 INFO L124 PetriNetUnfolderBase]: 489/794 cut-off events. [2025-03-13 21:24:12,410 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-03-13 21:24:12,412 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. [2025-03-13 21:24:12,414 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 99 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2025-03-13 21:24:12,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 516 flow [2025-03-13 21:24:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-13 21:24:12,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-03-13 21:24:12,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2025-03-13 21:24:12,416 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2025-03-13 21:24:12,416 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 200 transitions. [2025-03-13 21:24:12,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 516 flow [2025-03-13 21:24:12,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-03-13 21:24:12,419 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2025-03-13 21:24:12,419 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} [2025-03-13 21:24:12,420 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-03-13 21:24:12,420 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2025-03-13 21:24:12,420 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) [2025-03-13 21:24:12,420 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:24:12,420 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:24:12,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-13 21:24:12,620 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 [2025-03-13 21:24:12,621 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:24:12,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:24:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1573371591, now seen corresponding path program 3 times [2025-03-13 21:24:12,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:24:12,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181171285] [2025-03-13 21:24:12,621 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:24:12,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:24:12,631 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-13 21:24:12,663 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:24:12,663 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-13 21:24:12,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:24:12,840 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:12,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:24:12,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181171285] [2025-03-13 21:24:12,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181171285] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:24:12,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441362709] [2025-03-13 21:24:12,840 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-13 21:24:12,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:24:12,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:24:12,843 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) [2025-03-13 21:24:12,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-13 21:24:12,885 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-03-13 21:24:12,909 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-03-13 21:24:12,909 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-13 21:24:12,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:24:12,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-13 21:24:12,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:24:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:12,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:24:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:13,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441362709] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:24:13,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:24:13,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-03-13 21:24:13,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305772735] [2025-03-13 21:24:13,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:24:13,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-13 21:24:13,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:24:13,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-13 21:24:13,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-03-13 21:24:13,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-13 21:24:13,132 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) [2025-03-13 21:24:13,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:24:13,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-13 21:24:13,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:24:13,500 INFO L124 PetriNetUnfolderBase]: 873/1370 cut-off events. [2025-03-13 21:24:13,500 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2025-03-13 21:24:13,504 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. [2025-03-13 21:24:13,509 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 195 selfloop transitions, 23 changer transitions 0/223 dead transitions. [2025-03-13 21:24:13,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 223 transitions, 1054 flow [2025-03-13 21:24:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-13 21:24:13,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-03-13 21:24:13,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 398 transitions. [2025-03-13 21:24:13,514 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5718390804597702 [2025-03-13 21:24:13,514 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 24 states and 398 transitions. [2025-03-13 21:24:13,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 223 transitions, 1054 flow [2025-03-13 21:24:13,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 223 transitions, 982 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-03-13 21:24:13,524 INFO L231 Difference]: Finished difference. Result has 83 places, 47 transitions, 290 flow [2025-03-13 21:24:13,524 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} [2025-03-13 21:24:13,524 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2025-03-13 21:24:13,525 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 47 transitions, 290 flow [2025-03-13 21:24:13,525 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) [2025-03-13 21:24:13,525 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:24:13,525 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:24:13,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-13 21:24:13,729 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 [2025-03-13 21:24:13,729 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:24:13,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:24:13,730 INFO L85 PathProgramCache]: Analyzing trace with hash -681080569, now seen corresponding path program 4 times [2025-03-13 21:24:13,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:24:13,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138506587] [2025-03-13 21:24:13,731 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:24:13,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:24:13,742 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-13 21:24:13,755 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-13 21:24:13,755 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:24:13,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:24:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:14,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:24:14,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138506587] [2025-03-13 21:24:14,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138506587] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:24:14,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190369074] [2025-03-13 21:24:14,169 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-13 21:24:14,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:24:14,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:24:14,171 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) [2025-03-13 21:24:14,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-13 21:24:14,211 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-03-13 21:24:14,237 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-13 21:24:14,238 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-13 21:24:14,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:24:14,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-13 21:24:14,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:24:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:14,277 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:24:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:14,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190369074] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:24:14,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:24:14,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2025-03-13 21:24:14,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280981168] [2025-03-13 21:24:14,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:24:14,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-13 21:24:14,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:24:14,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-13 21:24:14,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2025-03-13 21:24:14,565 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-03-13 21:24:14,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 47 transitions, 290 flow. Second operand has 28 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 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) [2025-03-13 21:24:14,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:24:14,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-03-13 21:24:14,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:24:14,975 INFO L124 PetriNetUnfolderBase]: 1001/1562 cut-off events. [2025-03-13 21:24:14,975 INFO L125 PetriNetUnfolderBase]: For 16588/16588 co-relation queries the response was YES. [2025-03-13 21:24:14,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 conditions, 1562 events. 1001/1562 cut-off events. For 16588/16588 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5694 event pairs, 39 based on Foata normal form. 64/1605 useless extension candidates. Maximal degree in co-relation 4765. Up to 305 conditions per place. [2025-03-13 21:24:14,986 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 227 selfloop transitions, 27 changer transitions 0/259 dead transitions. [2025-03-13 21:24:14,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 259 transitions, 1246 flow [2025-03-13 21:24:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-13 21:24:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-13 21:24:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 454 transitions. [2025-03-13 21:24:14,990 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5591133004926109 [2025-03-13 21:24:14,990 INFO L175 Difference]: Start difference. First operand has 83 places, 47 transitions, 290 flow. Second operand 28 states and 454 transitions. [2025-03-13 21:24:14,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 259 transitions, 1246 flow [2025-03-13 21:24:15,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 259 transitions, 1142 flow, removed 41 selfloop flow, removed 11 redundant places. [2025-03-13 21:24:15,009 INFO L231 Difference]: Finished difference. Result has 103 places, 51 transitions, 290 flow [2025-03-13 21:24:15,010 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=28, PETRI_FLOW=290, PETRI_PLACES=103, PETRI_TRANSITIONS=51} [2025-03-13 21:24:15,011 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 73 predicate places. [2025-03-13 21:24:15,011 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 51 transitions, 290 flow [2025-03-13 21:24:15,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.357142857142858) internal successors, (234), 28 states have internal predecessors, (234), 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) [2025-03-13 21:24:15,012 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:24:15,012 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:24:15,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-13 21:24:15,212 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 [2025-03-13 21:24:15,213 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:24:15,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:24:15,214 INFO L85 PathProgramCache]: Analyzing trace with hash 119366087, now seen corresponding path program 5 times [2025-03-13 21:24:15,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:24:15,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67967855] [2025-03-13 21:24:15,214 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:24:15,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:24:15,225 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 14 equivalence classes. [2025-03-13 21:24:15,318 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:24:15,319 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-13 21:24:15,319 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:24:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:16,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:24:16,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67967855] [2025-03-13 21:24:16,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67967855] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:24:16,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685361462] [2025-03-13 21:24:16,847 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-13 21:24:16,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:24:16,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:24:16,850 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) [2025-03-13 21:24:16,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-13 21:24:16,885 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 39 statements into 14 equivalence classes. [2025-03-13 21:24:16,918 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 39 of 39 statements. [2025-03-13 21:24:16,918 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-13 21:24:16,918 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:24:16,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 89 conjuncts are in the unsatisfiable core [2025-03-13 21:24:16,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:24:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:18,435 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:24:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:24:20,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685361462] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:24:20,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:24:20,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 97 [2025-03-13 21:24:20,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306107494] [2025-03-13 21:24:20,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:24:20,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2025-03-13 21:24:20,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:24:20,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2025-03-13 21:24:20,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1342, Invalid=8164, Unknown=0, NotChecked=0, Total=9506 [2025-03-13 21:24:20,123 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-13 21:24:20,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 51 transitions, 290 flow. Second operand has 98 states, 98 states have (on average 6.163265306122449) internal successors, (604), 98 states have internal predecessors, (604), 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) [2025-03-13 21:24:20,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:24:20,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-13 21:24:20,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-13 21:25:01,111 INFO L124 PetriNetUnfolderBase]: 41560/67200 cut-off events. [2025-03-13 21:25:01,111 INFO L125 PetriNetUnfolderBase]: For 240492/240492 co-relation queries the response was YES. [2025-03-13 21:25:01,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183567 conditions, 67200 events. 41560/67200 cut-off events. For 240492/240492 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 456429 event pairs, 679 based on Foata normal form. 0/66620 useless extension candidates. Maximal degree in co-relation 183523. Up to 8745 conditions per place. [2025-03-13 21:25:01,569 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 809 selfloop transitions, 1594 changer transitions 1229/3635 dead transitions. [2025-03-13 21:25:01,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 3635 transitions, 24855 flow [2025-03-13 21:25:01,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2025-03-13 21:25:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2025-03-13 21:25:01,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 3516 transitions. [2025-03-13 21:25:01,585 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4699278267842823 [2025-03-13 21:25:01,585 INFO L175 Difference]: Start difference. First operand has 103 places, 51 transitions, 290 flow. Second operand 258 states and 3516 transitions. [2025-03-13 21:25:01,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 3635 transitions, 24855 flow [2025-03-13 21:25:02,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 3635 transitions, 20833 flow, removed 754 selfloop flow, removed 23 redundant places. [2025-03-13 21:25:02,080 INFO L231 Difference]: Finished difference. Result has 455 places, 1744 transitions, 10756 flow [2025-03-13 21:25:02,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=258, PETRI_FLOW=10756, PETRI_PLACES=455, PETRI_TRANSITIONS=1744} [2025-03-13 21:25:02,086 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 425 predicate places. [2025-03-13 21:25:02,086 INFO L471 AbstractCegarLoop]: Abstraction has has 455 places, 1744 transitions, 10756 flow [2025-03-13 21:25:02,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 6.163265306122449) internal successors, (604), 98 states have internal predecessors, (604), 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) [2025-03-13 21:25:02,087 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-13 21:25:02,087 INFO L206 CegarLoopForPetriNet]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-13 21:25:02,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-13 21:25:02,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:25:02,287 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-03-13 21:25:02,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-13 21:25:02,288 INFO L85 PathProgramCache]: Analyzing trace with hash -62438523, now seen corresponding path program 1 times [2025-03-13 21:25:02,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-13 21:25:02,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367452733] [2025-03-13 21:25:02,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:25:02,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-13 21:25:02,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-13 21:25:02,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-13 21:25:02,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:25:02,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:25:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:25:03,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-13 21:25:03,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367452733] [2025-03-13 21:25:03,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367452733] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-13 21:25:03,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460269977] [2025-03-13 21:25:03,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-13 21:25:03,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-13 21:25:03,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-13 21:25:03,679 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-13 21:25:03,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-13 21:25:03,718 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-13 21:25:03,743 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-13 21:25:03,743 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-13 21:25:03,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-13 21:25:03,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 91 conjuncts are in the unsatisfiable core [2025-03-13 21:25:03,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-13 21:25:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 300 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:25:05,135 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-13 21:25:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-13 21:25:06,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460269977] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-13 21:25:06,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-13 21:25:06,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2025-03-13 21:25:06,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523239086] [2025-03-13 21:25:06,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-13 21:25:06,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2025-03-13 21:25:06,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-13 21:25:06,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2025-03-13 21:25:06,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1434, Invalid=9278, Unknown=0, NotChecked=0, Total=10712 [2025-03-13 21:25:06,808 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-03-13 21:25:06,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 1744 transitions, 10756 flow. Second operand has 104 states, 104 states have (on average 6.211538461538462) internal successors, (646), 104 states have internal predecessors, (646), 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) [2025-03-13 21:25:06,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-13 21:25:06,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-03-13 21:25:06,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand