./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8fc3dc66 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-more-buffer-series.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 19:45:31,043 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 19:45:31,107 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-17 19:45:31,113 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 19:45:31,113 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 19:45:31,134 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 19:45:31,135 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 19:45:31,135 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 19:45:31,135 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 19:45:31,135 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 19:45:31,135 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 19:45:31,136 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 19:45:31,136 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 19:45:31,136 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 19:45:31,136 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 19:45:31,136 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 19:45:31,136 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 19:45:31,136 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 19:45:31,137 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 19:45:31,137 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 19:45:31,137 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 19:45:31,137 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 19:45:31,137 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 19:45:31,137 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 19:45:31,137 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-17 19:45:31,137 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 19:45:31,137 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 19:45:31,137 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 19:45:31,137 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 19:45:31,138 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 19:45:31,138 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 19:45:31,138 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 19:45:31,138 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 19:45:31,138 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 19:45:31,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 19:45:31,138 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 19:45:31,138 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 19:45:31,138 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 19:45:31,139 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 19:45:31,139 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 19:45:31,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 19:45:31,139 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 19:45:31,139 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 19:45:31,139 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 19:45:31,139 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 19:45:31,139 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 ! overflow) ) 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 -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2025-03-17 19:45:31,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 19:45:31,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 19:45:31,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 19:45:31,433 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 19:45:31,433 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 19:45:31,435 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2025-03-17 19:45:32,670 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5b64bbc/ede1160a245e411c9d8e7b6f0d8fc083/FLAG849bf20f4 [2025-03-17 19:45:32,913 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 19:45:32,914 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2025-03-17 19:45:32,928 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5b64bbc/ede1160a245e411c9d8e7b6f0d8fc083/FLAG849bf20f4 [2025-03-17 19:45:32,944 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a5b64bbc/ede1160a245e411c9d8e7b6f0d8fc083 [2025-03-17 19:45:32,946 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 19:45:32,947 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 19:45:32,949 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 19:45:32,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 19:45:32,952 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 19:45:32,953 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:45:32" (1/1) ... [2025-03-17 19:45:32,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fe29827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:32, skipping insertion in model container [2025-03-17 19:45:32,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 07:45:32" (1/1) ... [2025-03-17 19:45:32,971 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 19:45:33,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 19:45:33,129 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 19:45:33,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 19:45:33,163 INFO L204 MainTranslator]: Completed translation [2025-03-17 19:45:33,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33 WrapperNode [2025-03-17 19:45:33,164 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 19:45:33,164 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 19:45:33,164 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 19:45:33,164 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 19:45:33,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (1/1) ... [2025-03-17 19:45:33,173 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (1/1) ... [2025-03-17 19:45:33,197 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 369 [2025-03-17 19:45:33,198 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 19:45:33,198 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 19:45:33,198 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 19:45:33,198 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 19:45:33,209 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (1/1) ... [2025-03-17 19:45:33,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (1/1) ... [2025-03-17 19:45:33,216 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (1/1) ... [2025-03-17 19:45:33,227 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-03-17 19:45:33,227 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (1/1) ... [2025-03-17 19:45:33,227 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (1/1) ... [2025-03-17 19:45:33,234 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (1/1) ... [2025-03-17 19:45:33,236 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (1/1) ... [2025-03-17 19:45:33,237 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (1/1) ... [2025-03-17 19:45:33,238 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (1/1) ... [2025-03-17 19:45:33,242 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 19:45:33,243 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 19:45:33,243 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 19:45:33,243 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 19:45:33,245 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (1/1) ... [2025-03-17 19:45:33,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 19:45:33,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:45:33,270 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) [2025-03-17 19:45:33,275 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 [2025-03-17 19:45:33,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 19:45:33,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 19:45:33,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 19:45:33,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 19:45:33,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 19:45:33,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 19:45:33,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 19:45:33,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 19:45:33,290 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 19:45:33,290 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 19:45:33,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 19:45:33,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-17 19:45:33,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-17 19:45:33,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 19:45:33,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 19:45:33,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 19:45:33,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 19:45:33,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 19:45:33,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 19:45:33,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 19:45:33,293 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 19:45:33,387 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 19:45:33,388 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 19:45:33,832 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 19:45:33,833 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 19:45:34,209 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 19:45:34,209 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 19:45:34,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:45:34 BoogieIcfgContainer [2025-03-17 19:45:34,210 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 19:45:34,211 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 19:45:34,211 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 19:45:34,214 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 19:45:34,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 07:45:32" (1/3) ... [2025-03-17 19:45:34,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af045ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:45:34, skipping insertion in model container [2025-03-17 19:45:34,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 07:45:33" (2/3) ... [2025-03-17 19:45:34,215 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af045ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 07:45:34, skipping insertion in model container [2025-03-17 19:45:34,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 07:45:34" (3/3) ... [2025-03-17 19:45:34,215 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2025-03-17 19:45:34,228 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 19:45:34,230 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series.wvr.c that has 5 procedures, 82 locations, 1 initial locations, 7 loop locations, and 32 error locations. [2025-03-17 19:45:34,230 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 19:45:34,335 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-17 19:45:34,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 88 transitions, 204 flow [2025-03-17 19:45:34,447 INFO L124 PetriNetUnfolderBase]: 7/84 cut-off events. [2025-03-17 19:45:34,449 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 19:45:34,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 84 events. 7/84 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 273 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2025-03-17 19:45:34,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 88 transitions, 204 flow [2025-03-17 19:45:34,458 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 82 transitions, 185 flow [2025-03-17 19:45:34,469 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 19:45:34,480 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;@2ac5ced8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 19:45:34,480 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2025-03-17 19:45:34,484 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 19:45:34,484 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2025-03-17 19:45:34,484 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 19:45:34,484 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:45:34,485 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 19:45:34,485 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-03-17 19:45:34,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:45:34,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1077146, now seen corresponding path program 1 times [2025-03-17 19:45:34,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:45:34,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084528327] [2025-03-17 19:45:34,497 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:34,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:45:34,657 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 19:45:34,696 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 19:45:34,696 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:34,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:34,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:45:34,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084528327] [2025-03-17 19:45:34,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084528327] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:45:34,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:45:34,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 19:45:34,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619097447] [2025-03-17 19:45:34,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:45:34,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:45:34,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:45:34,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:45:34,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:45:34,936 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 88 [2025-03-17 19:45:34,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2025-03-17 19:45:34,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:45:34,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 88 [2025-03-17 19:45:34,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:45:39,289 INFO L124 PetriNetUnfolderBase]: 37136/48705 cut-off events. [2025-03-17 19:45:39,290 INFO L125 PetriNetUnfolderBase]: For 1718/1718 co-relation queries the response was YES. [2025-03-17 19:45:39,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98684 conditions, 48705 events. 37136/48705 cut-off events. For 1718/1718 co-relation queries the response was YES. Maximal size of possible extension queue 2730. Compared 307075 event pairs, 32026 based on Foata normal form. 3/29708 useless extension candidates. Maximal degree in co-relation 92174. Up to 48092 conditions per place. [2025-03-17 19:45:39,583 INFO L140 encePairwiseOnDemand]: 61/88 looper letters, 59 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2025-03-17 19:45:39,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 80 transitions, 319 flow [2025-03-17 19:45:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 19:45:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 19:45:39,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2025-03-17 19:45:39,594 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2025-03-17 19:45:39,595 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 185 flow. Second operand 4 states and 146 transitions. [2025-03-17 19:45:39,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 80 transitions, 319 flow [2025-03-17 19:45:39,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 306 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-03-17 19:45:39,667 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 238 flow [2025-03-17 19:45:39,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2025-03-17 19:45:39,672 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, -12 predicate places. [2025-03-17 19:45:39,672 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 238 flow [2025-03-17 19:45:39,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2025-03-17 19:45:39,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:45:39,673 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-03-17 19:45:39,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 19:45:39,673 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-03-17 19:45:39,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:45:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2025477992, now seen corresponding path program 1 times [2025-03-17 19:45:39,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:45:39,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190702426] [2025-03-17 19:45:39,674 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:39,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:45:39,685 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 19:45:39,705 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 19:45:39,705 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:39,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:39,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:45:39,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190702426] [2025-03-17 19:45:39,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190702426] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:45:39,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568096916] [2025-03-17 19:45:39,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:39,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:45:39,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:45:39,790 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) [2025-03-17 19:45:39,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 19:45:39,853 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 19:45:39,862 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 19:45:39,863 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:39,863 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:39,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:45:39,866 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:45:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:39,895 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 19:45:39,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568096916] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:45:39,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 19:45:39,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-03-17 19:45:39,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603188301] [2025-03-17 19:45:39,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:45:39,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 19:45:39,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:45:39,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 19:45:39,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-17 19:45:39,914 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 88 [2025-03-17 19:45:39,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 238 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2025-03-17 19:45:39,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:45:39,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 88 [2025-03-17 19:45:39,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:45:43,246 INFO L124 PetriNetUnfolderBase]: 37136/48702 cut-off events. [2025-03-17 19:45:43,246 INFO L125 PetriNetUnfolderBase]: For 342/342 co-relation queries the response was YES. [2025-03-17 19:45:43,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97907 conditions, 48702 events. 37136/48702 cut-off events. For 342/342 co-relation queries the response was YES. Maximal size of possible extension queue 2730. Compared 307326 event pairs, 32026 based on Foata normal form. 3/29710 useless extension candidates. Maximal degree in co-relation 97834. Up to 48077 conditions per place. [2025-03-17 19:45:43,532 INFO L140 encePairwiseOnDemand]: 75/88 looper letters, 49 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2025-03-17 19:45:43,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 77 transitions, 358 flow [2025-03-17 19:45:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 19:45:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 19:45:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2025-03-17 19:45:43,533 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30113636363636365 [2025-03-17 19:45:43,533 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 238 flow. Second operand 6 states and 159 transitions. [2025-03-17 19:45:43,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 77 transitions, 358 flow [2025-03-17 19:45:43,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 19:45:43,536 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 260 flow [2025-03-17 19:45:43,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=78, PETRI_TRANSITIONS=77} [2025-03-17 19:45:43,538 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2025-03-17 19:45:43,538 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 260 flow [2025-03-17 19:45:43,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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) [2025-03-17 19:45:43,538 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:45:43,538 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2025-03-17 19:45:43,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 19:45:43,738 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 [2025-03-17 19:45:43,739 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-03-17 19:45:43,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:45:43,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1634690691, now seen corresponding path program 1 times [2025-03-17 19:45:43,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:45:43,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703223290] [2025-03-17 19:45:43,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:43,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:45:43,750 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 19:45:43,763 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 19:45:43,767 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:43,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:43,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:45:43,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703223290] [2025-03-17 19:45:43,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703223290] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 19:45:43,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277921330] [2025-03-17 19:45:43,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:43,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 19:45:43,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 19:45:43,859 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) [2025-03-17 19:45:43,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 19:45:43,924 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 19:45:43,934 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 19:45:43,934 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:43,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:43,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 19:45:43,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 19:45:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:43,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 19:45:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:43,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277921330] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 19:45:43,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 19:45:43,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-03-17 19:45:43,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933652049] [2025-03-17 19:45:43,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 19:45:43,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 19:45:43,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:45:43,989 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 19:45:43,989 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-03-17 19:45:44,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 88 [2025-03-17 19:45:44,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 77 transitions, 260 flow. Second operand has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 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) [2025-03-17 19:45:44,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:45:44,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 88 [2025-03-17 19:45:44,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:45:47,268 INFO L124 PetriNetUnfolderBase]: 37145/48738 cut-off events. [2025-03-17 19:45:47,269 INFO L125 PetriNetUnfolderBase]: For 407/407 co-relation queries the response was YES. [2025-03-17 19:45:47,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98048 conditions, 48738 events. 37145/48738 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 2730. Compared 307333 event pairs, 32026 based on Foata normal form. 9/29752 useless extension candidates. Maximal degree in co-relation 97836. Up to 48092 conditions per place. [2025-03-17 19:45:47,507 INFO L140 encePairwiseOnDemand]: 75/88 looper letters, 56 selfloop transitions, 37 changer transitions 0/104 dead transitions. [2025-03-17 19:45:47,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 104 transitions, 620 flow [2025-03-17 19:45:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 19:45:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 19:45:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2025-03-17 19:45:47,512 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2863636363636364 [2025-03-17 19:45:47,513 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 260 flow. Second operand 10 states and 252 transitions. [2025-03-17 19:45:47,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 104 transitions, 620 flow [2025-03-17 19:45:47,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 104 transitions, 537 flow, removed 16 selfloop flow, removed 5 redundant places. [2025-03-17 19:45:47,517 INFO L231 Difference]: Finished difference. Result has 85 places, 104 transitions, 475 flow [2025-03-17 19:45:47,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=475, PETRI_PLACES=85, PETRI_TRANSITIONS=104} [2025-03-17 19:45:47,518 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, -3 predicate places. [2025-03-17 19:45:47,519 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 104 transitions, 475 flow [2025-03-17 19:45:47,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.083333333333332) internal successors, (193), 12 states have internal predecessors, (193), 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) [2025-03-17 19:45:47,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:45:47,520 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:45:47,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 19:45:47,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-03-17 19:45:47,720 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-03-17 19:45:47,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:45:47,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1249263453, now seen corresponding path program 1 times [2025-03-17 19:45:47,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:45:47,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358208756] [2025-03-17 19:45:47,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:47,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:45:47,729 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 19:45:47,737 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 19:45:47,740 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:47,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:47,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:45:47,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358208756] [2025-03-17 19:45:47,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358208756] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:45:47,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:45:47,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 19:45:47,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699769356] [2025-03-17 19:45:47,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:45:47,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 19:45:47,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:45:47,808 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 19:45:47,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 19:45:47,808 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 88 [2025-03-17 19:45:47,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 104 transitions, 475 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2025-03-17 19:45:47,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:45:47,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 88 [2025-03-17 19:45:47,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 19:45:52,782 INFO L124 PetriNetUnfolderBase]: 54266/72189 cut-off events. [2025-03-17 19:45:52,782 INFO L125 PetriNetUnfolderBase]: For 443/443 co-relation queries the response was YES. [2025-03-17 19:45:52,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144210 conditions, 72189 events. 54266/72189 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 3550. Compared 482682 event pairs, 18478 based on Foata normal form. 0/46173 useless extension candidates. Maximal degree in co-relation 144112. Up to 43072 conditions per place. [2025-03-17 19:45:53,113 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 127 selfloop transitions, 2 changer transitions 0/143 dead transitions. [2025-03-17 19:45:53,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 143 transitions, 818 flow [2025-03-17 19:45:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 19:45:53,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 19:45:53,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2025-03-17 19:45:53,114 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2025-03-17 19:45:53,114 INFO L175 Difference]: Start difference. First operand has 85 places, 104 transitions, 475 flow. Second operand 3 states and 158 transitions. [2025-03-17 19:45:53,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 143 transitions, 818 flow [2025-03-17 19:45:53,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 143 transitions, 781 flow, removed 9 selfloop flow, removed 2 redundant places. [2025-03-17 19:45:53,117 INFO L231 Difference]: Finished difference. Result has 86 places, 105 transitions, 452 flow [2025-03-17 19:45:53,117 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=452, PETRI_PLACES=86, PETRI_TRANSITIONS=105} [2025-03-17 19:45:53,117 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2025-03-17 19:45:53,118 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 105 transitions, 452 flow [2025-03-17 19:45:53,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2025-03-17 19:45:53,118 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 19:45:53,118 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 19:45:53,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 19:45:53,118 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-03-17 19:45:53,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 19:45:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash 92130470, now seen corresponding path program 1 times [2025-03-17 19:45:53,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 19:45:53,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621845408] [2025-03-17 19:45:53,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 19:45:53,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 19:45:53,125 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 19:45:53,133 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 19:45:53,133 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 19:45:53,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 19:45:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 19:45:53,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 19:45:53,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621845408] [2025-03-17 19:45:53,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621845408] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 19:45:53,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 19:45:53,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 19:45:53,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096411754] [2025-03-17 19:45:53,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 19:45:53,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 19:45:53,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 19:45:53,230 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 19:45:53,230 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 19:45:53,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 88 [2025-03-17 19:45:53,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 105 transitions, 452 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2025-03-17 19:45:53,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 19:45:53,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 88 [2025-03-17 19:45:53,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand