./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/butterfly.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version da043454 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 ../../../trunk/examples/svcomp/pthread/butterfly.c -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 e8226af5da4e069e4481bfca7c2a0242d4d3d2f88c011766a34df8282c563c6e --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-29 10:58:33,065 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-29 10:58:33,113 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-29 10:58:33,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-29 10:58:33,116 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-29 10:58:33,129 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-29 10:58:33,129 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-29 10:58:33,129 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-29 10:58:33,130 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-29 10:58:33,130 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-29 10:58:33,130 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-29 10:58:33,130 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-29 10:58:33,130 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-29 10:58:33,130 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-29 10:58:33,130 INFO L153 SettingsManager]: * Use SBE=true [2025-04-29 10:58:33,130 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-29 10:58:33,131 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-29 10:58:33,131 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-29 10:58:33,131 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-29 10:58:33,131 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-29 10:58:33,131 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-29 10:58:33,131 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-29 10:58:33,131 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-29 10:58:33,131 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-29 10:58:33,131 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-29 10:58:33,131 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-29 10:58:33,131 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-29 10:58:33,132 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-29 10:58:33,132 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-29 10:58:33,132 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 10:58:33,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 10:58:33,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 10:58:33,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 10:58:33,132 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-29 10:58:33,132 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 10:58:33,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 10:58:33,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 10:58:33,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 10:58:33,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-29 10:58:33,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-29 10:58:33,133 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-29 10:58:33,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-29 10:58:33,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-29 10:58:33,133 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-29 10:58:33,133 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-29 10:58:33,133 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-29 10:58:33,133 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-29 10:58:33,133 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 -> e8226af5da4e069e4481bfca7c2a0242d4d3d2f88c011766a34df8282c563c6e [2025-04-29 10:58:33,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-29 10:58:33,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-29 10:58:33,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-29 10:58:33,344 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-29 10:58:33,344 INFO L274 PluginConnector]: CDTParser initialized [2025-04-29 10:58:33,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/butterfly.c [2025-04-29 10:58:34,638 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdb1ffa6f/9102b11306274c82929dac19aa96575a/FLAG3280749e6 [2025-04-29 10:58:34,828 INFO L389 CDTParser]: Found 1 translation units. [2025-04-29 10:58:34,829 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/butterfly.c [2025-04-29 10:58:34,830 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 10:58:34,830 WARN L117 ultiparseSymbolTable]: System include stdatomic.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 10:58:34,830 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 10:58:34,836 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdb1ffa6f/9102b11306274c82929dac19aa96575a/FLAG3280749e6 [2025-04-29 10:58:35,688 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bdb1ffa6f/9102b11306274c82929dac19aa96575a [2025-04-29 10:58:35,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-29 10:58:35,692 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-29 10:58:35,693 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-29 10:58:35,693 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-29 10:58:35,696 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-29 10:58:35,696 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:35,697 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e3afdd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35, skipping insertion in model container [2025-04-29 10:58:35,697 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:35,708 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-29 10:58:35,852 WARN L117 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/butterfly.c[432,445] [2025-04-29 10:58:35,889 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 10:58:35,898 INFO L200 MainTranslator]: Completed pre-run [2025-04-29 10:58:35,921 WARN L117 LibraryModelHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/butterfly.c[432,445] [2025-04-29 10:58:35,940 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 10:58:35,954 INFO L204 MainTranslator]: Completed translation [2025-04-29 10:58:35,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35 WrapperNode [2025-04-29 10:58:35,955 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-29 10:58:35,956 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-29 10:58:35,956 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-29 10:58:35,956 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-29 10:58:35,961 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:35,970 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:35,987 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2025-04-29 10:58:35,987 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-29 10:58:35,988 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-29 10:58:35,988 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-29 10:58:35,988 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-29 10:58:35,994 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:35,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:36,000 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:36,009 INFO L175 MemorySlicer]: No memory access in input program. [2025-04-29 10:58:36,013 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:36,014 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:36,017 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:36,020 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:36,022 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:36,025 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:36,026 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:36,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-29 10:58:36,033 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-29 10:58:36,033 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-29 10:58:36,033 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-29 10:58:36,034 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (1/1) ... [2025-04-29 10:58:36,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 10:58:36,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 10:58:36,060 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) [2025-04-29 10:58:36,062 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 [2025-04-29 10:58:36,080 INFO L130 BoogieDeclarations]: Found specification of procedure p0 [2025-04-29 10:58:36,081 INFO L138 BoogieDeclarations]: Found implementation of procedure p0 [2025-04-29 10:58:36,081 INFO L130 BoogieDeclarations]: Found specification of procedure p1 [2025-04-29 10:58:36,081 INFO L138 BoogieDeclarations]: Found implementation of procedure p1 [2025-04-29 10:58:36,081 INFO L130 BoogieDeclarations]: Found specification of procedure p2 [2025-04-29 10:58:36,081 INFO L138 BoogieDeclarations]: Found implementation of procedure p2 [2025-04-29 10:58:36,081 INFO L130 BoogieDeclarations]: Found specification of procedure p3 [2025-04-29 10:58:36,081 INFO L138 BoogieDeclarations]: Found implementation of procedure p3 [2025-04-29 10:58:36,082 INFO L130 BoogieDeclarations]: Found specification of procedure p4 [2025-04-29 10:58:36,082 INFO L138 BoogieDeclarations]: Found implementation of procedure p4 [2025-04-29 10:58:36,082 INFO L130 BoogieDeclarations]: Found specification of procedure p5 [2025-04-29 10:58:36,082 INFO L138 BoogieDeclarations]: Found implementation of procedure p5 [2025-04-29 10:58:36,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-29 10:58:36,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-29 10:58:36,084 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-29 10:58:36,168 INFO L234 CfgBuilder]: Building ICFG [2025-04-29 10:58:36,170 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-29 10:58:36,334 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-29 10:58:36,334 INFO L283 CfgBuilder]: Performing block encoding [2025-04-29 10:58:36,393 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-29 10:58:36,394 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-29 10:58:36,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 10:58:36 BoogieIcfgContainer [2025-04-29 10:58:36,394 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-29 10:58:36,396 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-29 10:58:36,396 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-29 10:58:36,400 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-29 10:58:36,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.04 10:58:35" (1/3) ... [2025-04-29 10:58:36,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7617e01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 10:58:36, skipping insertion in model container [2025-04-29 10:58:36,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 10:58:35" (2/3) ... [2025-04-29 10:58:36,401 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7617e01a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 10:58:36, skipping insertion in model container [2025-04-29 10:58:36,401 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 10:58:36" (3/3) ... [2025-04-29 10:58:36,402 INFO L128 eAbstractionObserver]: Analyzing ICFG butterfly.c [2025-04-29 10:58:36,412 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-29 10:58:36,413 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG butterfly.c that has 7 procedures, 77 locations, 77 edges, 1 initial locations, 0 loop locations, and 1 error locations. [2025-04-29 10:58:36,413 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-29 10:58:36,475 INFO L143 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2025-04-29 10:58:36,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 83 transitions, 208 flow [2025-04-29 10:58:36,548 INFO L116 PetriNetUnfolderBase]: 7/77 cut-off events. [2025-04-29 10:58:36,549 INFO L117 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-04-29 10:58:36,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 77 events. 7/77 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 194 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2025-04-29 10:58:36,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 83 transitions, 208 flow [2025-04-29 10:58:36,555 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 74 transitions, 184 flow [2025-04-29 10:58:36,562 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-29 10:58:36,573 INFO L340 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;@1df4e2c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-29 10:58:36,573 INFO L341 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-04-29 10:58:36,605 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-29 10:58:36,605 INFO L116 PetriNetUnfolderBase]: 6/73 cut-off events. [2025-04-29 10:58:36,605 INFO L117 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-04-29 10:58:36,605 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 10:58:36,605 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:36,606 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-29 10:58:36,612 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1886161836, now seen corresponding path program 1 times [2025-04-29 10:58:36,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:36,617 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343763204] [2025-04-29 10:58:36,617 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 10:58:36,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:36,679 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 56 statements into 1 equivalence classes. [2025-04-29 10:58:36,717 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 56 of 56 statements. [2025-04-29 10:58:36,718 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:36,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:37,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:37,088 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343763204] [2025-04-29 10:58:37,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343763204] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:58:37,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:58:37,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 10:58:37,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271491706] [2025-04-29 10:58:37,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:58:37,097 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 10:58:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:37,116 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 10:58:37,117 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 10:58:37,129 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 83 [2025-04-29 10:58:37,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 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) [2025-04-29 10:58:37,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 10:58:37,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 83 [2025-04-29 10:58:37,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 10:58:37,657 INFO L116 PetriNetUnfolderBase]: 1761/3732 cut-off events. [2025-04-29 10:58:37,658 INFO L117 PetriNetUnfolderBase]: For 586/586 co-relation queries the response was YES. [2025-04-29 10:58:37,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6596 conditions, 3732 events. 1761/3732 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 28215 event pairs, 414 based on Foata normal form. 1/3622 useless extension candidates. Maximal degree in co-relation 5548. Up to 2323 conditions per place. [2025-04-29 10:58:37,733 INFO L140 encePairwiseOnDemand]: 74/83 looper letters, 46 selfloop transitions, 7 changer transitions 2/100 dead transitions. [2025-04-29 10:58:37,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 100 transitions, 379 flow [2025-04-29 10:58:37,734 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 10:58:37,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-29 10:58:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 260 transitions. [2025-04-29 10:58:37,743 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7831325301204819 [2025-04-29 10:58:37,745 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 184 flow. Second operand 4 states and 260 transitions. [2025-04-29 10:58:37,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 100 transitions, 379 flow [2025-04-29 10:58:37,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 100 transitions, 333 flow, removed 0 selfloop flow, removed 12 redundant places. [2025-04-29 10:58:37,755 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 209 flow [2025-04-29 10:58:37,757 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=209, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2025-04-29 10:58:37,761 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, -7 predicate places. [2025-04-29 10:58:37,761 INFO L485 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 209 flow [2025-04-29 10:58:37,761 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 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) [2025-04-29 10:58:37,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 10:58:37,761 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:37,762 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-29 10:58:37,762 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-29 10:58:37,762 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:37,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1183231803, now seen corresponding path program 1 times [2025-04-29 10:58:37,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:37,763 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147880396] [2025-04-29 10:58:37,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 10:58:37,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:37,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-04-29 10:58:37,778 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-04-29 10:58:37,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:37,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:37,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:37,837 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147880396] [2025-04-29 10:58:37,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147880396] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:58:37,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:58:37,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 10:58:37,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258260149] [2025-04-29 10:58:37,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:58:37,839 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 10:58:37,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:37,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 10:58:37,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 10:58:37,860 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 83 [2025-04-29 10:58:37,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 209 flow. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 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) [2025-04-29 10:58:37,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 10:58:37,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 83 [2025-04-29 10:58:37,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 10:58:38,977 INFO L116 PetriNetUnfolderBase]: 6733/13791 cut-off events. [2025-04-29 10:58:38,977 INFO L117 PetriNetUnfolderBase]: For 2284/2360 co-relation queries the response was YES. [2025-04-29 10:58:39,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27603 conditions, 13791 events. 6733/13791 cut-off events. For 2284/2360 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 128240 event pairs, 1930 based on Foata normal form. 404/13518 useless extension candidates. Maximal degree in co-relation 27592. Up to 6442 conditions per place. [2025-04-29 10:58:39,077 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 97 selfloop transitions, 6 changer transitions 0/146 dead transitions. [2025-04-29 10:58:39,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 146 transitions, 623 flow [2025-04-29 10:58:39,078 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 10:58:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-29 10:58:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2025-04-29 10:58:39,081 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.8144578313253013 [2025-04-29 10:58:39,081 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 209 flow. Second operand 5 states and 338 transitions. [2025-04-29 10:58:39,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 146 transitions, 623 flow [2025-04-29 10:58:39,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 146 transitions, 603 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-29 10:58:39,084 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 245 flow [2025-04-29 10:58:39,086 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2025-04-29 10:58:39,087 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, -3 predicate places. [2025-04-29 10:58:39,087 INFO L485 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 245 flow [2025-04-29 10:58:39,087 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 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) [2025-04-29 10:58:39,087 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 10:58:39,087 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:39,087 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-29 10:58:39,088 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-29 10:58:39,088 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:39,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1676760695, now seen corresponding path program 1 times [2025-04-29 10:58:39,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:39,090 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844354333] [2025-04-29 10:58:39,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 10:58:39,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:39,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-04-29 10:58:39,108 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-04-29 10:58:39,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:39,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:39,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:39,148 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844354333] [2025-04-29 10:58:39,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844354333] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:58:39,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:58:39,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 10:58:39,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908567086] [2025-04-29 10:58:39,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:58:39,148 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 10:58:39,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:39,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 10:58:39,149 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 10:58:39,163 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 83 [2025-04-29 10:58:39,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 245 flow. Second operand has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 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) [2025-04-29 10:58:39,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 10:58:39,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 83 [2025-04-29 10:58:39,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 10:58:40,704 INFO L116 PetriNetUnfolderBase]: 9404/20093 cut-off events. [2025-04-29 10:58:40,704 INFO L117 PetriNetUnfolderBase]: For 8753/9074 co-relation queries the response was YES. [2025-04-29 10:58:40,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43825 conditions, 20093 events. 9404/20093 cut-off events. For 8753/9074 co-relation queries the response was YES. Maximal size of possible extension queue 1200. Compared 205621 event pairs, 3804 based on Foata normal form. 627/19830 useless extension candidates. Maximal degree in co-relation 19756. Up to 9834 conditions per place. [2025-04-29 10:58:40,926 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 92 selfloop transitions, 10 changer transitions 0/145 dead transitions. [2025-04-29 10:58:40,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 145 transitions, 654 flow [2025-04-29 10:58:40,926 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 10:58:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-29 10:58:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 335 transitions. [2025-04-29 10:58:40,928 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.8072289156626506 [2025-04-29 10:58:40,928 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 245 flow. Second operand 5 states and 335 transitions. [2025-04-29 10:58:40,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 145 transitions, 654 flow [2025-04-29 10:58:40,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 145 transitions, 649 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-29 10:58:40,937 INFO L231 Difference]: Finished difference. Result has 90 places, 90 transitions, 305 flow [2025-04-29 10:58:40,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=305, PETRI_PLACES=90, PETRI_TRANSITIONS=90} [2025-04-29 10:58:40,938 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 3 predicate places. [2025-04-29 10:58:40,939 INFO L485 AbstractCegarLoop]: Abstraction has has 90 places, 90 transitions, 305 flow [2025-04-29 10:58:40,939 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.5) internal successors, (226), 4 states have internal predecessors, (226), 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) [2025-04-29 10:58:40,939 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 10:58:40,939 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:40,939 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-29 10:58:40,939 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-29 10:58:40,940 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:40,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2125442005, now seen corresponding path program 1 times [2025-04-29 10:58:40,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:40,940 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739341035] [2025-04-29 10:58:40,940 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 10:58:40,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:40,954 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 58 statements into 1 equivalence classes. [2025-04-29 10:58:40,965 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 58 of 58 statements. [2025-04-29 10:58:40,966 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:40,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:41,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:41,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:41,107 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739341035] [2025-04-29 10:58:41,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739341035] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:58:41,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:58:41,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-29 10:58:41,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273184737] [2025-04-29 10:58:41,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:58:41,108 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-29 10:58:41,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:41,108 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-29 10:58:41,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-29 10:58:41,111 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 83 [2025-04-29 10:58:41,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 305 flow. Second operand has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 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) [2025-04-29 10:58:41,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 10:58:41,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 83 [2025-04-29 10:58:41,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 10:58:42,030 INFO L116 PetriNetUnfolderBase]: 5452/11967 cut-off events. [2025-04-29 10:58:42,030 INFO L117 PetriNetUnfolderBase]: For 2745/3981 co-relation queries the response was YES. [2025-04-29 10:58:42,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25855 conditions, 11967 events. 5452/11967 cut-off events. For 2745/3981 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 115683 event pairs, 486 based on Foata normal form. 78/11438 useless extension candidates. Maximal degree in co-relation 13095. Up to 5929 conditions per place. [2025-04-29 10:58:42,115 INFO L140 encePairwiseOnDemand]: 74/83 looper letters, 61 selfloop transitions, 13 changer transitions 4/131 dead transitions. [2025-04-29 10:58:42,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 131 transitions, 599 flow [2025-04-29 10:58:42,116 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 10:58:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-29 10:58:42,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 328 transitions. [2025-04-29 10:58:42,117 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7903614457831325 [2025-04-29 10:58:42,117 INFO L175 Difference]: Start difference. First operand has 90 places, 90 transitions, 305 flow. Second operand 5 states and 328 transitions. [2025-04-29 10:58:42,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 131 transitions, 599 flow [2025-04-29 10:58:42,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 594 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-29 10:58:42,123 INFO L231 Difference]: Finished difference. Result has 95 places, 96 transitions, 378 flow [2025-04-29 10:58:42,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=95, PETRI_TRANSITIONS=96} [2025-04-29 10:58:42,125 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 8 predicate places. [2025-04-29 10:58:42,125 INFO L485 AbstractCegarLoop]: Abstraction has has 95 places, 96 transitions, 378 flow [2025-04-29 10:58:42,126 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 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) [2025-04-29 10:58:42,126 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 10:58:42,126 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:42,126 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-29 10:58:42,126 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-29 10:58:42,127 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:42,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2129270186, now seen corresponding path program 1 times [2025-04-29 10:58:42,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:42,127 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833263340] [2025-04-29 10:58:42,127 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 10:58:42,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:42,143 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-04-29 10:58:42,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-04-29 10:58:42,146 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:42,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:42,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:42,196 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833263340] [2025-04-29 10:58:42,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833263340] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:58:42,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:58:42,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 10:58:42,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631029631] [2025-04-29 10:58:42,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:58:42,197 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 10:58:42,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:42,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 10:58:42,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 10:58:42,203 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 83 [2025-04-29 10:58:42,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 96 transitions, 378 flow. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2025-04-29 10:58:42,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 10:58:42,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 83 [2025-04-29 10:58:42,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 10:58:45,655 INFO L116 PetriNetUnfolderBase]: 26018/52144 cut-off events. [2025-04-29 10:58:45,660 INFO L117 PetriNetUnfolderBase]: For 41705/56983 co-relation queries the response was YES. [2025-04-29 10:58:45,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130935 conditions, 52144 events. 26018/52144 cut-off events. For 41705/56983 co-relation queries the response was YES. Maximal size of possible extension queue 3583. Compared 598464 event pairs, 5433 based on Foata normal form. 1832/50376 useless extension candidates. Maximal degree in co-relation 130899. Up to 26538 conditions per place. [2025-04-29 10:58:46,041 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 120 selfloop transitions, 6 changer transitions 0/176 dead transitions. [2025-04-29 10:58:46,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 176 transitions, 986 flow [2025-04-29 10:58:46,042 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 10:58:46,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-29 10:58:46,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 335 transitions. [2025-04-29 10:58:46,042 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.8072289156626506 [2025-04-29 10:58:46,042 INFO L175 Difference]: Start difference. First operand has 95 places, 96 transitions, 378 flow. Second operand 5 states and 335 transitions. [2025-04-29 10:58:46,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 176 transitions, 986 flow [2025-04-29 10:58:46,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 176 transitions, 914 flow, removed 18 selfloop flow, removed 3 redundant places. [2025-04-29 10:58:46,053 INFO L231 Difference]: Finished difference. Result has 98 places, 101 transitions, 395 flow [2025-04-29 10:58:46,053 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=395, PETRI_PLACES=98, PETRI_TRANSITIONS=101} [2025-04-29 10:58:46,053 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 11 predicate places. [2025-04-29 10:58:46,053 INFO L485 AbstractCegarLoop]: Abstraction has has 98 places, 101 transitions, 395 flow [2025-04-29 10:58:46,054 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2025-04-29 10:58:46,054 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 10:58:46,054 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:46,054 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-29 10:58:46,054 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-29 10:58:46,054 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:46,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1169934612, now seen corresponding path program 1 times [2025-04-29 10:58:46,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:46,055 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147379842] [2025-04-29 10:58:46,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 10:58:46,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:46,062 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-04-29 10:58:46,065 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-04-29 10:58:46,065 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:46,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:46,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:46,108 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147379842] [2025-04-29 10:58:46,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147379842] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:58:46,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:58:46,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 10:58:46,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843561351] [2025-04-29 10:58:46,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:58:46,109 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 10:58:46,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:46,109 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 10:58:46,109 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 10:58:46,115 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 83 [2025-04-29 10:58:46,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 101 transitions, 395 flow. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2025-04-29 10:58:46,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 10:58:46,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 83 [2025-04-29 10:58:46,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 10:58:51,178 INFO L116 PetriNetUnfolderBase]: 38753/77284 cut-off events. [2025-04-29 10:58:51,178 INFO L117 PetriNetUnfolderBase]: For 41244/46912 co-relation queries the response was YES. [2025-04-29 10:58:51,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177230 conditions, 77284 events. 38753/77284 cut-off events. For 41244/46912 co-relation queries the response was YES. Maximal size of possible extension queue 5982. Compared 944287 event pairs, 10536 based on Foata normal form. 3024/72757 useless extension candidates. Maximal degree in co-relation 79359. Up to 40915 conditions per place. [2025-04-29 10:58:51,747 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 116 selfloop transitions, 6 changer transitions 0/177 dead transitions. [2025-04-29 10:58:51,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 177 transitions, 940 flow [2025-04-29 10:58:51,747 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 10:58:51,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-29 10:58:51,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2025-04-29 10:58:51,748 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7975903614457831 [2025-04-29 10:58:51,748 INFO L175 Difference]: Start difference. First operand has 98 places, 101 transitions, 395 flow. Second operand 5 states and 331 transitions. [2025-04-29 10:58:51,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 177 transitions, 940 flow [2025-04-29 10:58:51,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 177 transitions, 937 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-29 10:58:51,755 INFO L231 Difference]: Finished difference. Result has 104 places, 106 transitions, 437 flow [2025-04-29 10:58:51,756 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=437, PETRI_PLACES=104, PETRI_TRANSITIONS=106} [2025-04-29 10:58:51,756 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 17 predicate places. [2025-04-29 10:58:51,756 INFO L485 AbstractCegarLoop]: Abstraction has has 104 places, 106 transitions, 437 flow [2025-04-29 10:58:51,756 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2025-04-29 10:58:51,756 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 10:58:51,756 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 10:58:51,756 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-29 10:58:51,756 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-29 10:58:51,757 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:58:51,757 INFO L85 PathProgramCache]: Analyzing trace with hash 162977076, now seen corresponding path program 1 times [2025-04-29 10:58:51,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:58:51,757 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309023883] [2025-04-29 10:58:51,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 10:58:51,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:58:51,762 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 60 statements into 1 equivalence classes. [2025-04-29 10:58:51,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-04-29 10:58:51,766 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 10:58:51,766 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:58:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:58:51,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:58:51,808 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309023883] [2025-04-29 10:58:51,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309023883] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:58:51,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:58:51,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 10:58:51,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681754367] [2025-04-29 10:58:51,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:58:51,809 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 10:58:51,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:58:51,809 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 10:58:51,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 10:58:51,816 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 83 [2025-04-29 10:58:51,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 437 flow. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2025-04-29 10:58:51,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 10:58:51,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 83 [2025-04-29 10:58:51,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 10:58:59,940 INFO L116 PetriNetUnfolderBase]: 57464/119470 cut-off events. [2025-04-29 10:58:59,940 INFO L117 PetriNetUnfolderBase]: For 92662/109396 co-relation queries the response was YES. [2025-04-29 10:59:00,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291295 conditions, 119470 events. 57464/119470 cut-off events. For 92662/109396 co-relation queries the response was YES. Maximal size of possible extension queue 8409. Compared 1570375 event pairs, 22727 based on Foata normal form. 3727/112369 useless extension candidates. Maximal degree in co-relation 142873. Up to 66997 conditions per place. [2025-04-29 10:59:01,055 INFO L140 encePairwiseOnDemand]: 78/83 looper letters, 92 selfloop transitions, 18 changer transitions 0/162 dead transitions. [2025-04-29 10:59:01,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 162 transitions, 914 flow [2025-04-29 10:59:01,056 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-29 10:59:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-29 10:59:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 323 transitions. [2025-04-29 10:59:01,057 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7783132530120482 [2025-04-29 10:59:01,057 INFO L175 Difference]: Start difference. First operand has 104 places, 106 transitions, 437 flow. Second operand 5 states and 323 transitions. [2025-04-29 10:59:01,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 162 transitions, 914 flow [2025-04-29 10:59:01,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 162 transitions, 911 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-29 10:59:01,160 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 569 flow [2025-04-29 10:59:01,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=569, PETRI_PLACES=110, PETRI_TRANSITIONS=115} [2025-04-29 10:59:01,161 INFO L279 CegarLoopForPetriNet]: 87 programPoint places, 23 predicate places. [2025-04-29 10:59:01,161 INFO L485 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 569 flow [2025-04-29 10:59:01,161 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2025-04-29 10:59:01,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 10:59:01,161 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 10:59:01,161 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-29 10:59:01,161 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-04-29 10:59:01,162 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 10:59:01,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1588855830, now seen corresponding path program 2 times [2025-04-29 10:59:01,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 10:59:01,162 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269643451] [2025-04-29 10:59:01,162 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 10:59:01,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 10:59:01,168 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 60 statements into 1 equivalence classes. [2025-04-29 10:59:01,171 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 60 of 60 statements. [2025-04-29 10:59:01,171 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-29 10:59:01,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 10:59:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 10:59:01,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 10:59:01,212 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269643451] [2025-04-29 10:59:01,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269643451] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 10:59:01,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 10:59:01,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-29 10:59:01,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921602196] [2025-04-29 10:59:01,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 10:59:01,213 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 10:59:01,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 10:59:01,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 10:59:01,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 10:59:01,222 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 83 [2025-04-29 10:59:01,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 115 transitions, 569 flow. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 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) [2025-04-29 10:59:01,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 10:59:01,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 83 [2025-04-29 10:59:01,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand