./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed 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/weaver/popl20-bad-buffer-mult-alt2.wvr.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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:32:57,242 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:32:57,289 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:32:57,293 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:32:57,293 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:32:57,310 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:32:57,311 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:32:57,311 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:32:57,311 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:32:57,311 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:32:57,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:32:57,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:32:57,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:32:57,312 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:32:57,312 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:32:57,313 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:32:57,313 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:32:57,313 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:32:57,313 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:32:57,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:32:57,313 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:32:57,313 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:32:57,313 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:32:57,313 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:32:57,313 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:32:57,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:32:57,313 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:32:57,313 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:32:57,313 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:32:57,315 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:32:57,315 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 -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2025-03-08 17:32:57,521 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:32:57,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:32:57,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:32:57,531 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:32:57,531 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:32:57,533 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-03-08 17:32:58,677 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115ca0f99/5a4bc7bef06842a7944d9fca103d22bd/FLAG4efe89549 [2025-03-08 17:32:58,918 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:32:58,919 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2025-03-08 17:32:58,928 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115ca0f99/5a4bc7bef06842a7944d9fca103d22bd/FLAG4efe89549 [2025-03-08 17:32:59,243 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/115ca0f99/5a4bc7bef06842a7944d9fca103d22bd [2025-03-08 17:32:59,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:32:59,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:32:59,247 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:32:59,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:32:59,250 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:32:59,251 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71efa920 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59, skipping insertion in model container [2025-03-08 17:32:59,253 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,265 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:32:59,375 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/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2025-03-08 17:32:59,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:32:59,391 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:32:59,413 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2025-03-08 17:32:59,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:32:59,434 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:32:59,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59 WrapperNode [2025-03-08 17:32:59,434 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:32:59,435 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:32:59,435 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:32:59,435 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:32:59,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,444 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,461 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 289 [2025-03-08 17:32:59,462 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:32:59,462 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:32:59,462 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:32:59,462 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:32:59,468 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,470 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,481 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-08 17:32:59,481 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,481 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,486 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,487 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,488 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,491 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,492 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:32:59,493 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:32:59,493 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:32:59,493 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:32:59,494 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (1/1) ... [2025-03-08 17:32:59,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:32:59,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:32:59,515 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) [2025-03-08 17:32:59,517 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 [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:32:59,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:32:59,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-08 17:32:59,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-08 17:32:59,536 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:32:59,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:32:59,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:32:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:32:59,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:32:59,538 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:32:59,624 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:32:59,626 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:32:59,967 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:32:59,967 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:33:00,198 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:33:00,198 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:33:00,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:33:00 BoogieIcfgContainer [2025-03-08 17:33:00,198 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:33:00,200 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:33:00,200 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:33:00,203 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:33:00,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:32:59" (1/3) ... [2025-03-08 17:33:00,204 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26138200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:33:00, skipping insertion in model container [2025-03-08 17:33:00,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:32:59" (2/3) ... [2025-03-08 17:33:00,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26138200 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:33:00, skipping insertion in model container [2025-03-08 17:33:00,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:33:00" (3/3) ... [2025-03-08 17:33:00,206 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2025-03-08 17:33:00,218 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:33:00,219 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-buffer-mult-alt2.wvr.c that has 5 procedures, 43 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-08 17:33:00,219 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:33:00,274 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-08 17:33:00,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 48 transitions, 124 flow [2025-03-08 17:33:00,330 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2025-03-08 17:33:00,332 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:33:00,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 44 events. 6/44 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2025-03-08 17:33:00,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 48 transitions, 124 flow [2025-03-08 17:33:00,337 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 43 transitions, 110 flow [2025-03-08 17:33:00,344 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:33:00,353 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;@26e37f5a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:33:00,354 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-08 17:33:00,366 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:33:00,367 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2025-03-08 17:33:00,367 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:33:00,367 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:00,368 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] [2025-03-08 17:33:00,368 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:33:00,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:00,371 INFO L85 PathProgramCache]: Analyzing trace with hash -417808382, now seen corresponding path program 1 times [2025-03-08 17:33:00,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:00,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473626577] [2025-03-08 17:33:00,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:00,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:00,439 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:33:00,495 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:33:00,495 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:00,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:00,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:00,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473626577] [2025-03-08 17:33:00,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473626577] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:33:00,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:33:00,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:33:00,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108790416] [2025-03-08 17:33:00,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:00,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-08 17:33:00,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:00,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-08 17:33:00,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-08 17:33:00,959 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-08 17:33:00,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2025-03-08 17:33:00,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:00,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-08 17:33:00,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:01,735 INFO L124 PetriNetUnfolderBase]: 4291/6050 cut-off events. [2025-03-08 17:33:01,736 INFO L125 PetriNetUnfolderBase]: For 484/484 co-relation queries the response was YES. [2025-03-08 17:33:01,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12139 conditions, 6050 events. 4291/6050 cut-off events. For 484/484 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31106 event pairs, 560 based on Foata normal form. 280/6287 useless extension candidates. Maximal degree in co-relation 10585. Up to 2701 conditions per place. [2025-03-08 17:33:01,779 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 78 selfloop transitions, 6 changer transitions 6/99 dead transitions. [2025-03-08 17:33:01,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 99 transitions, 435 flow [2025-03-08 17:33:01,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:33:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:33:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2025-03-08 17:33:01,793 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5902777777777778 [2025-03-08 17:33:01,794 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 110 flow. Second operand 6 states and 170 transitions. [2025-03-08 17:33:01,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 99 transitions, 435 flow [2025-03-08 17:33:01,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 99 transitions, 397 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-08 17:33:01,809 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 133 flow [2025-03-08 17:33:01,811 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=133, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2025-03-08 17:33:01,813 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2025-03-08 17:33:01,814 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 133 flow [2025-03-08 17:33:01,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2025-03-08 17:33:01,815 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:01,815 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] [2025-03-08 17:33:01,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:33:01,816 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:33:01,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:01,817 INFO L85 PathProgramCache]: Analyzing trace with hash 594696050, now seen corresponding path program 1 times [2025-03-08 17:33:01,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:01,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846137652] [2025-03-08 17:33:01,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:01,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:01,832 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 17:33:01,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 17:33:01,851 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:01,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:02,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:02,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846137652] [2025-03-08 17:33:02,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846137652] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:02,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838822218] [2025-03-08 17:33:02,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:02,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:02,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:02,106 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) [2025-03-08 17:33:02,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-08 17:33:02,173 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 17:33:02,205 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 17:33:02,205 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:02,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:02,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-08 17:33:02,213 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:02,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:02,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838822218] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:02,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-08 17:33:02,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 7] total 15 [2025-03-08 17:33:02,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512764991] [2025-03-08 17:33:02,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:02,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:33:02,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:02,568 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:33:02,568 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-08 17:33:02,573 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2025-03-08 17:33:02,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 133 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2025-03-08 17:33:02,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:02,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2025-03-08 17:33:02,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:03,698 INFO L124 PetriNetUnfolderBase]: 10955/14405 cut-off events. [2025-03-08 17:33:03,698 INFO L125 PetriNetUnfolderBase]: For 3801/3811 co-relation queries the response was YES. [2025-03-08 17:33:03,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33032 conditions, 14405 events. 10955/14405 cut-off events. For 3801/3811 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 72491 event pairs, 1614 based on Foata normal form. 186/13732 useless extension candidates. Maximal degree in co-relation 14508. Up to 4280 conditions per place. [2025-03-08 17:33:03,782 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 94 selfloop transitions, 12 changer transitions 0/113 dead transitions. [2025-03-08 17:33:03,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 113 transitions, 515 flow [2025-03-08 17:33:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:33:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:33:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2025-03-08 17:33:03,786 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-08 17:33:03,786 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 133 flow. Second operand 6 states and 168 transitions. [2025-03-08 17:33:03,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 113 transitions, 515 flow [2025-03-08 17:33:03,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 113 transitions, 509 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:33:03,801 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 216 flow [2025-03-08 17:33:03,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=216, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2025-03-08 17:33:03,802 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2025-03-08 17:33:03,802 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 216 flow [2025-03-08 17:33:03,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 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) [2025-03-08 17:33:03,803 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:03,803 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] [2025-03-08 17:33:03,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-08 17:33:04,007 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 [2025-03-08 17:33:04,007 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:33:04,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:04,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1014971022, now seen corresponding path program 1 times [2025-03-08 17:33:04,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:04,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601816516] [2025-03-08 17:33:04,008 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:04,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:04,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 17:33:04,028 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 17:33:04,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:04,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:04,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:04,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601816516] [2025-03-08 17:33:04,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601816516] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:33:04,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:33:04,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:33:04,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870226905] [2025-03-08 17:33:04,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:04,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:33:04,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:04,111 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:33:04,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:33:04,111 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-08 17:33:04,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:04,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:04,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-08 17:33:04,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:04,914 INFO L124 PetriNetUnfolderBase]: 8139/11356 cut-off events. [2025-03-08 17:33:04,914 INFO L125 PetriNetUnfolderBase]: For 13845/13983 co-relation queries the response was YES. [2025-03-08 17:33:04,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30121 conditions, 11356 events. 8139/11356 cut-off events. For 13845/13983 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 62600 event pairs, 5672 based on Foata normal form. 261/11427 useless extension candidates. Maximal degree in co-relation 12518. Up to 9620 conditions per place. [2025-03-08 17:33:04,968 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 43 selfloop transitions, 2 changer transitions 24/80 dead transitions. [2025-03-08 17:33:04,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 80 transitions, 419 flow [2025-03-08 17:33:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:33:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:33:04,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2025-03-08 17:33:04,971 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2025-03-08 17:33:04,971 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 216 flow. Second operand 5 states and 126 transitions. [2025-03-08 17:33:04,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 80 transitions, 419 flow [2025-03-08 17:33:04,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 80 transitions, 415 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-08 17:33:04,990 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 235 flow [2025-03-08 17:33:04,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2025-03-08 17:33:04,991 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2025-03-08 17:33:04,992 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 235 flow [2025-03-08 17:33:04,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:33:04,992 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:04,992 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] [2025-03-08 17:33:04,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:33:04,992 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:33:04,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:04,994 INFO L85 PathProgramCache]: Analyzing trace with hash 270531823, now seen corresponding path program 1 times [2025-03-08 17:33:04,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:04,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483797170] [2025-03-08 17:33:04,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:04,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:05,008 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 17:33:05,050 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 17:33:05,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:05,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:05,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:05,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483797170] [2025-03-08 17:33:05,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483797170] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:05,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309591189] [2025-03-08 17:33:05,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:05,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:05,979 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) [2025-03-08 17:33:05,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-08 17:33:06,044 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 17:33:06,074 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 17:33:06,074 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:06,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:06,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-08 17:33:06,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:06,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-03-08 17:33:06,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-08 17:33:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:06,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-08 17:33:06,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2025-03-08 17:33:06,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2025-03-08 17:33:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:06,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309591189] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-08 17:33:06,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-08 17:33:06,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-03-08 17:33:06,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931940966] [2025-03-08 17:33:06,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-08 17:33:06,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-08 17:33:06,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:06,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-08 17:33:06,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-03-08 17:33:06,754 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-08 17:33:06,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 235 flow. Second operand has 18 states, 18 states have (on average 16.166666666666668) internal successors, (291), 18 states have internal predecessors, (291), 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) [2025-03-08 17:33:06,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:06,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-08 17:33:06,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:10,284 INFO L124 PetriNetUnfolderBase]: 27003/37991 cut-off events. [2025-03-08 17:33:10,285 INFO L125 PetriNetUnfolderBase]: For 41495/41693 co-relation queries the response was YES. [2025-03-08 17:33:10,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102244 conditions, 37991 events. 27003/37991 cut-off events. For 41495/41693 co-relation queries the response was YES. Maximal size of possible extension queue 1408. Compared 246622 event pairs, 6289 based on Foata normal form. 212/37898 useless extension candidates. Maximal degree in co-relation 102225. Up to 11639 conditions per place. [2025-03-08 17:33:10,533 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 253 selfloop transitions, 49 changer transitions 15/328 dead transitions. [2025-03-08 17:33:10,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 328 transitions, 1875 flow [2025-03-08 17:33:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-08 17:33:10,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-03-08 17:33:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 546 transitions. [2025-03-08 17:33:10,535 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.56875 [2025-03-08 17:33:10,535 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 235 flow. Second operand 20 states and 546 transitions. [2025-03-08 17:33:10,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 328 transitions, 1875 flow [2025-03-08 17:33:10,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 328 transitions, 1839 flow, removed 17 selfloop flow, removed 2 redundant places. [2025-03-08 17:33:10,591 INFO L231 Difference]: Finished difference. Result has 82 places, 106 transitions, 645 flow [2025-03-08 17:33:10,591 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=645, PETRI_PLACES=82, PETRI_TRANSITIONS=106} [2025-03-08 17:33:10,592 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 32 predicate places. [2025-03-08 17:33:10,592 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 106 transitions, 645 flow [2025-03-08 17:33:10,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.166666666666668) internal successors, (291), 18 states have internal predecessors, (291), 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) [2025-03-08 17:33:10,592 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:10,592 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:10,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-08 17:33:10,793 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,SelfDestructingSolverStorable3 [2025-03-08 17:33:10,793 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:33:10,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:10,794 INFO L85 PathProgramCache]: Analyzing trace with hash 756954354, now seen corresponding path program 1 times [2025-03-08 17:33:10,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:10,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339102430] [2025-03-08 17:33:10,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:10,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:10,804 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 17:33:10,868 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 17:33:10,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:10,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:33:11,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:11,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339102430] [2025-03-08 17:33:11,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339102430] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-08 17:33:11,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015838772] [2025-03-08 17:33:11,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:11,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:11,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:33:11,648 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) [2025-03-08 17:33:11,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-08 17:33:11,709 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-08 17:33:11,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-08 17:33:11,737 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:11,738 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:11,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-08 17:33:11,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-08 17:33:11,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2025-03-08 17:33:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-08 17:33:11,897 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-08 17:33:11,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015838772] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:33:11,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-08 17:33:11,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2025-03-08 17:33:11,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401807127] [2025-03-08 17:33:11,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:11,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:33:11,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:11,898 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:33:11,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-03-08 17:33:11,899 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-08 17:33:11,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 106 transitions, 645 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2025-03-08 17:33:11,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:11,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-08 17:33:11,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:16,600 INFO L124 PetriNetUnfolderBase]: 49304/69542 cut-off events. [2025-03-08 17:33:16,601 INFO L125 PetriNetUnfolderBase]: For 98040/98781 co-relation queries the response was YES. [2025-03-08 17:33:16,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196589 conditions, 69542 events. 49304/69542 cut-off events. For 98040/98781 co-relation queries the response was YES. Maximal size of possible extension queue 2680. Compared 488254 event pairs, 4547 based on Foata normal form. 323/69518 useless extension candidates. Maximal degree in co-relation 165092. Up to 26529 conditions per place. [2025-03-08 17:33:17,022 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 132 selfloop transitions, 60 changer transitions 4/207 dead transitions. [2025-03-08 17:33:17,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 207 transitions, 1469 flow [2025-03-08 17:33:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:33:17,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:33:17,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2025-03-08 17:33:17,023 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-08 17:33:17,023 INFO L175 Difference]: Start difference. First operand has 82 places, 106 transitions, 645 flow. Second operand 6 states and 192 transitions. [2025-03-08 17:33:17,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 207 transitions, 1469 flow [2025-03-08 17:33:17,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 207 transitions, 1423 flow, removed 22 selfloop flow, removed 2 redundant places. [2025-03-08 17:33:17,438 INFO L231 Difference]: Finished difference. Result has 88 places, 133 transitions, 1021 flow [2025-03-08 17:33:17,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1021, PETRI_PLACES=88, PETRI_TRANSITIONS=133} [2025-03-08 17:33:17,438 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2025-03-08 17:33:17,438 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 133 transitions, 1021 flow [2025-03-08 17:33:17,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2025-03-08 17:33:17,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:17,439 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] [2025-03-08 17:33:17,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-08 17:33:17,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-08 17:33:17,639 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:33:17,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1054028639, now seen corresponding path program 1 times [2025-03-08 17:33:17,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:17,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595302176] [2025-03-08 17:33:17,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:33:17,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:17,648 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-08 17:33:17,655 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 17:33:17,655 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:33:17,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:33:17,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:17,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595302176] [2025-03-08 17:33:17,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595302176] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:33:17,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:33:17,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:33:17,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730133147] [2025-03-08 17:33:17,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:17,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:33:17,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:17,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:33:17,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:33:17,709 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-08 17:33:17,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 133 transitions, 1021 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2025-03-08 17:33:17,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:17,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-08 17:33:17,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:33:25,699 INFO L124 PetriNetUnfolderBase]: 68609/98495 cut-off events. [2025-03-08 17:33:25,699 INFO L125 PetriNetUnfolderBase]: For 242102/244011 co-relation queries the response was YES. [2025-03-08 17:33:26,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294632 conditions, 98495 events. 68609/98495 cut-off events. For 242102/244011 co-relation queries the response was YES. Maximal size of possible extension queue 3601. Compared 744270 event pairs, 23910 based on Foata normal form. 2642/100559 useless extension candidates. Maximal degree in co-relation 246460. Up to 51721 conditions per place. [2025-03-08 17:33:26,654 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 184 selfloop transitions, 7 changer transitions 0/202 dead transitions. [2025-03-08 17:33:26,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 202 transitions, 2046 flow [2025-03-08 17:33:26,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:33:26,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:33:26,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-03-08 17:33:26,655 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-08 17:33:26,655 INFO L175 Difference]: Start difference. First operand has 88 places, 133 transitions, 1021 flow. Second operand 3 states and 96 transitions. [2025-03-08 17:33:26,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 202 transitions, 2046 flow [2025-03-08 17:33:27,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 202 transitions, 2034 flow, removed 6 selfloop flow, removed 0 redundant places. [2025-03-08 17:33:27,057 INFO L231 Difference]: Finished difference. Result has 91 places, 134 transitions, 1086 flow [2025-03-08 17:33:27,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1086, PETRI_PLACES=91, PETRI_TRANSITIONS=134} [2025-03-08 17:33:27,058 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 41 predicate places. [2025-03-08 17:33:27,058 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 134 transitions, 1086 flow [2025-03-08 17:33:27,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2025-03-08 17:33:27,058 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:33:27,058 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:33:27,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 17:33:27,058 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:33:27,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:33:27,059 INFO L85 PathProgramCache]: Analyzing trace with hash -261966820, now seen corresponding path program 2 times [2025-03-08 17:33:27,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:33:27,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034164855] [2025-03-08 17:33:27,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:33:27,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:33:27,067 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 40 statements into 2 equivalence classes. [2025-03-08 17:33:27,082 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 40 of 40 statements. [2025-03-08 17:33:27,083 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-08 17:33:27,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:33:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-08 17:33:27,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:33:27,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034164855] [2025-03-08 17:33:27,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034164855] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:33:27,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:33:27,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:33:27,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150383513] [2025-03-08 17:33:27,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:33:27,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:33:27,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:33:27,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:33:27,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:33:27,144 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-08 17:33:27,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 134 transitions, 1086 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2025-03-08 17:33:27,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:33:27,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-08 17:33:27,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand