./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 c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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-?-c00e63d-m [2025-02-06 18:53:06,786 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 18:53:06,822 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-02-06 18:53:06,826 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 18:53:06,826 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 18:53:06,852 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 18:53:06,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 18:53:06,852 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 18:53:06,852 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 18:53:06,853 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 18:53:06,853 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 18:53:06,853 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 18:53:06,853 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 18:53:06,853 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 18:53:06,853 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 18:53:06,853 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 18:53:06,853 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 18:53:06,853 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 18:53:06,853 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 18:53:06,853 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 18:53:06,853 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 18:53:06,853 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 18:53:06,856 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 18:53:06,856 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 18:53:06,856 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-02-06 18:53:06,856 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 18:53:06,856 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 18:53:06,856 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 18:53:06,856 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 18:53:06,856 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 18:53:06,857 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 18:53:06,857 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 18:53:06,857 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 18:53:06,857 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-jdk21/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 [2025-02-06 18:53:07,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 18:53:07,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 18:53:07,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 18:53:07,063 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 18:53:07,063 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 18:53:07,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2025-02-06 18:53:08,228 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6f7e63917/51445e42614c4bd19d501ae0e8cdd37d/FLAG7995b1c93 [2025-02-06 18:53:08,502 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 18:53:08,503 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2025-02-06 18:53:08,511 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6f7e63917/51445e42614c4bd19d501ae0e8cdd37d/FLAG7995b1c93 [2025-02-06 18:53:08,818 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6f7e63917/51445e42614c4bd19d501ae0e8cdd37d [2025-02-06 18:53:08,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 18:53:08,821 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 18:53:08,822 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 18:53:08,822 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 18:53:08,825 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 18:53:08,826 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 06:53:08" (1/1) ... [2025-02-06 18:53:08,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a93e1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:08, skipping insertion in model container [2025-02-06 18:53:08,827 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 06:53:08" (1/1) ... [2025-02-06 18:53:08,837 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 18:53:08,994 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 18:53:09,004 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 18:53:09,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 18:53:09,046 INFO L204 MainTranslator]: Completed translation [2025-02-06 18:53:09,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09 WrapperNode [2025-02-06 18:53:09,047 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 18:53:09,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 18:53:09,048 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 18:53:09,049 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 18:53:09,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (1/1) ... [2025-02-06 18:53:09,059 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (1/1) ... [2025-02-06 18:53:09,087 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 369 [2025-02-06 18:53:09,091 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 18:53:09,091 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 18:53:09,091 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 18:53:09,091 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 18:53:09,097 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (1/1) ... [2025-02-06 18:53:09,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (1/1) ... [2025-02-06 18:53:09,104 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (1/1) ... [2025-02-06 18:53:09,125 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]. [2025-02-06 18:53:09,125 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (1/1) ... [2025-02-06 18:53:09,126 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (1/1) ... [2025-02-06 18:53:09,131 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (1/1) ... [2025-02-06 18:53:09,133 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (1/1) ... [2025-02-06 18:53:09,134 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (1/1) ... [2025-02-06 18:53:09,134 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (1/1) ... [2025-02-06 18:53:09,136 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 18:53:09,137 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 18:53:09,137 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 18:53:09,137 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 18:53:09,138 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (1/1) ... [2025-02-06 18:53:09,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 18:53:09,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 18:53:09,166 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 18:53:09,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 18:53:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 18:53:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 18:53:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 18:53:09,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 18:53:09,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 18:53:09,191 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 18:53:09,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 18:53:09,191 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 18:53:09,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 18:53:09,191 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 18:53:09,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 18:53:09,191 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-06 18:53:09,191 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-06 18:53:09,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 18:53:09,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 18:53:09,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 18:53:09,192 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 18:53:09,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 18:53:09,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 18:53:09,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 18:53:09,193 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 18:53:09,296 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 18:53:09,297 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 18:53:09,791 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 18:53:09,792 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 18:53:10,147 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 18:53:10,148 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 18:53:10,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 06:53:10 BoogieIcfgContainer [2025-02-06 18:53:10,148 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 18:53:10,150 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 18:53:10,150 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 18:53:10,154 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 18:53:10,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 06:53:08" (1/3) ... [2025-02-06 18:53:10,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ec234a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 06:53:10, skipping insertion in model container [2025-02-06 18:53:10,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 06:53:09" (2/3) ... [2025-02-06 18:53:10,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ec234a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 06:53:10, skipping insertion in model container [2025-02-06 18:53:10,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 06:53:10" (3/3) ... [2025-02-06 18:53:10,156 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2025-02-06 18:53:10,169 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 18:53:10,171 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. [2025-02-06 18:53:10,171 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 18:53:10,278 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-06 18:53:10,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 88 transitions, 204 flow [2025-02-06 18:53:10,369 INFO L124 PetriNetUnfolderBase]: 7/84 cut-off events. [2025-02-06 18:53:10,371 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 18:53:10,374 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 272 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. [2025-02-06 18:53:10,374 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 88 transitions, 204 flow [2025-02-06 18:53:10,377 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 82 transitions, 185 flow [2025-02-06 18:53:10,382 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 18:53:10,392 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;@5e12d485, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 18:53:10,394 INFO L334 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2025-02-06 18:53:10,397 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 18:53:10,397 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2025-02-06 18:53:10,397 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 18:53:10,397 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 18:53:10,398 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 18:53:10,398 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-02-06 18:53:10,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 18:53:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1082111, now seen corresponding path program 1 times [2025-02-06 18:53:10,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 18:53:10,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549740998] [2025-02-06 18:53:10,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 18:53:10,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 18:53:10,492 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 18:53:10,511 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 18:53:10,511 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 18:53:10,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 18:53:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 18:53:10,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 18:53:10,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549740998] [2025-02-06 18:53:10,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549740998] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 18:53:10,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 18:53:10,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 18:53:10,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403010907] [2025-02-06 18:53:10,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 18:53:10,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 18:53:10,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 18:53:10,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 18:53:10,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 18:53:10,733 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 88 [2025-02-06 18:53:10,735 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) [2025-02-06 18:53:10,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 18:53:10,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 88 [2025-02-06 18:53:10,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 18:53:14,641 INFO L124 PetriNetUnfolderBase]: 37136/48705 cut-off events. [2025-02-06 18:53:14,642 INFO L125 PetriNetUnfolderBase]: For 1638/1638 co-relation queries the response was YES. [2025-02-06 18:53:14,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98684 conditions, 48705 events. 37136/48705 cut-off events. For 1638/1638 co-relation queries the response was YES. Maximal size of possible extension queue 2724. Compared 303094 event pairs, 32026 based on Foata normal form. 3/29689 useless extension candidates. Maximal degree in co-relation 92174. Up to 48092 conditions per place. [2025-02-06 18:53:14,950 INFO L140 encePairwiseOnDemand]: 61/88 looper letters, 59 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2025-02-06 18:53:14,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 80 transitions, 319 flow [2025-02-06 18:53:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 18:53:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 18:53:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2025-02-06 18:53:14,962 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2025-02-06 18:53:14,963 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 185 flow. Second operand 4 states and 146 transitions. [2025-02-06 18:53:14,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 80 transitions, 319 flow [2025-02-06 18:53:15,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 80 transitions, 306 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-02-06 18:53:15,309 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 238 flow [2025-02-06 18:53:15,310 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} [2025-02-06 18:53:15,313 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, -12 predicate places. [2025-02-06 18:53:15,313 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 238 flow [2025-02-06 18:53:15,313 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) [2025-02-06 18:53:15,313 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 18:53:15,313 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-06 18:53:15,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 18:53:15,314 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-02-06 18:53:15,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 18:53:15,314 INFO L85 PathProgramCache]: Analyzing trace with hash -2121572024, now seen corresponding path program 1 times [2025-02-06 18:53:15,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 18:53:15,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890484487] [2025-02-06 18:53:15,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 18:53:15,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 18:53:15,323 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 18:53:15,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 18:53:15,331 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 18:53:15,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 18:53:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 18:53:15,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 18:53:15,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890484487] [2025-02-06 18:53:15,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890484487] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 18:53:15,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521433160] [2025-02-06 18:53:15,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 18:53:15,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 18:53:15,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 18:53:15,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 18:53:15,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 18:53:15,494 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 18:53:15,505 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 18:53:15,505 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 18:53:15,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 18:53:15,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 18:53:15,509 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 18:53:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 18:53:15,611 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 18:53:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521433160] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 18:53:15,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 18:53:15,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-02-06 18:53:15,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695781582] [2025-02-06 18:53:15,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 18:53:15,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 18:53:15,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 18:53:15,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 18:53:15,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-06 18:53:15,638 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 88 [2025-02-06 18:53:15,639 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) [2025-02-06 18:53:15,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 18:53:15,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 88 [2025-02-06 18:53:15,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 18:53:18,822 INFO L124 PetriNetUnfolderBase]: 37136/48702 cut-off events. [2025-02-06 18:53:18,822 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2025-02-06 18:53:18,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97907 conditions, 48702 events. 37136/48702 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 2724. Compared 302936 event pairs, 32026 based on Foata normal form. 3/29691 useless extension candidates. Maximal degree in co-relation 97834. Up to 48077 conditions per place. [2025-02-06 18:53:19,061 INFO L140 encePairwiseOnDemand]: 75/88 looper letters, 49 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2025-02-06 18:53:19,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 77 transitions, 358 flow [2025-02-06 18:53:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 18:53:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 18:53:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2025-02-06 18:53:19,065 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30113636363636365 [2025-02-06 18:53:19,065 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 238 flow. Second operand 6 states and 159 transitions. [2025-02-06 18:53:19,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 77 transitions, 358 flow [2025-02-06 18:53:19,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 77 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-02-06 18:53:19,068 INFO L231 Difference]: Finished difference. Result has 78 places, 77 transitions, 260 flow [2025-02-06 18:53:19,068 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} [2025-02-06 18:53:19,068 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2025-02-06 18:53:19,068 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 77 transitions, 260 flow [2025-02-06 18:53:19,068 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) [2025-02-06 18:53:19,068 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 18:53:19,069 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2025-02-06 18:53:19,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-06 18:53:19,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 18:53:19,270 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-02-06 18:53:19,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 18:53:19,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1344222302, now seen corresponding path program 1 times [2025-02-06 18:53:19,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 18:53:19,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835497992] [2025-02-06 18:53:19,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 18:53:19,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 18:53:19,281 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 18:53:19,291 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 18:53:19,294 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 18:53:19,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 18:53:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 18:53:19,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 18:53:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835497992] [2025-02-06 18:53:19,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835497992] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 18:53:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730943065] [2025-02-06 18:53:19,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 18:53:19,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 18:53:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 18:53:19,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 18:53:19,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 18:53:19,417 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 18:53:19,426 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 18:53:19,427 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 18:53:19,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 18:53:19,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 18:53:19,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 18:53:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 18:53:19,449 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 18:53:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 18:53:19,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730943065] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 18:53:19,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 18:53:19,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-06 18:53:19,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880789428] [2025-02-06 18:53:19,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 18:53:19,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 18:53:19,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 18:53:19,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 18:53:19,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2025-02-06 18:53:19,517 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 88 [2025-02-06 18:53:19,518 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) [2025-02-06 18:53:19,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 18:53:19,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 88 [2025-02-06 18:53:19,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 18:53:23,453 INFO L124 PetriNetUnfolderBase]: 37145/48738 cut-off events. [2025-02-06 18:53:23,454 INFO L125 PetriNetUnfolderBase]: For 367/367 co-relation queries the response was YES. [2025-02-06 18:53:23,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98048 conditions, 48738 events. 37145/48738 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 2724. Compared 303514 event pairs, 32026 based on Foata normal form. 9/29733 useless extension candidates. Maximal degree in co-relation 97836. Up to 48092 conditions per place. [2025-02-06 18:53:23,660 INFO L140 encePairwiseOnDemand]: 75/88 looper letters, 56 selfloop transitions, 37 changer transitions 0/104 dead transitions. [2025-02-06 18:53:23,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 104 transitions, 620 flow [2025-02-06 18:53:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 18:53:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 18:53:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2025-02-06 18:53:23,663 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2863636363636364 [2025-02-06 18:53:23,663 INFO L175 Difference]: Start difference. First operand has 78 places, 77 transitions, 260 flow. Second operand 10 states and 252 transitions. [2025-02-06 18:53:23,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 104 transitions, 620 flow [2025-02-06 18:53:23,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 104 transitions, 537 flow, removed 16 selfloop flow, removed 5 redundant places. [2025-02-06 18:53:23,665 INFO L231 Difference]: Finished difference. Result has 85 places, 104 transitions, 475 flow [2025-02-06 18:53:23,666 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} [2025-02-06 18:53:23,666 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, -3 predicate places. [2025-02-06 18:53:23,666 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 104 transitions, 475 flow [2025-02-06 18:53:23,666 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) [2025-02-06 18:53:23,666 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 18:53:23,666 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 18:53:23,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 18:53:23,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 18:53:23,871 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-02-06 18:53:23,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 18:53:23,872 INFO L85 PathProgramCache]: Analyzing trace with hash 320785435, now seen corresponding path program 1 times [2025-02-06 18:53:23,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 18:53:23,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951524242] [2025-02-06 18:53:23,872 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 18:53:23,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 18:53:23,882 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 18:53:23,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 18:53:23,898 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 18:53:23,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 18:53:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 18:53:23,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 18:53:23,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951524242] [2025-02-06 18:53:23,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951524242] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 18:53:23,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 18:53:23,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 18:53:23,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569348475] [2025-02-06 18:53:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 18:53:23,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 18:53:23,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 18:53:23,972 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 18:53:23,972 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 18:53:23,972 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 88 [2025-02-06 18:53:23,973 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) [2025-02-06 18:53:23,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 18:53:23,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 88 [2025-02-06 18:53:23,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 18:53:29,030 INFO L124 PetriNetUnfolderBase]: 54266/72189 cut-off events. [2025-02-06 18:53:29,031 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2025-02-06 18:53:29,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144210 conditions, 72189 events. 54266/72189 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 3561. Compared 481100 event pairs, 18478 based on Foata normal form. 0/46169 useless extension candidates. Maximal degree in co-relation 144112. Up to 43072 conditions per place. [2025-02-06 18:53:29,401 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 127 selfloop transitions, 2 changer transitions 0/143 dead transitions. [2025-02-06 18:53:29,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 143 transitions, 818 flow [2025-02-06 18:53:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 18:53:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 18:53:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 158 transitions. [2025-02-06 18:53:29,403 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2025-02-06 18:53:29,403 INFO L175 Difference]: Start difference. First operand has 85 places, 104 transitions, 475 flow. Second operand 3 states and 158 transitions. [2025-02-06 18:53:29,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 143 transitions, 818 flow [2025-02-06 18:53:29,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 143 transitions, 781 flow, removed 9 selfloop flow, removed 2 redundant places. [2025-02-06 18:53:29,408 INFO L231 Difference]: Finished difference. Result has 86 places, 105 transitions, 452 flow [2025-02-06 18:53:29,408 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} [2025-02-06 18:53:29,409 INFO L279 CegarLoopForPetriNet]: 88 programPoint places, -2 predicate places. [2025-02-06 18:53:29,411 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 105 transitions, 452 flow [2025-02-06 18:53:29,411 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) [2025-02-06 18:53:29,411 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 18:53:29,411 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 18:53:29,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 18:53:29,412 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (and 59 more)] === [2025-02-06 18:53:29,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 18:53:29,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1375930032, now seen corresponding path program 1 times [2025-02-06 18:53:29,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 18:53:29,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083037362] [2025-02-06 18:53:29,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 18:53:29,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 18:53:29,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 18:53:29,435 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 18:53:29,435 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 18:53:29,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 18:53:29,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 18:53:29,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 18:53:29,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083037362] [2025-02-06 18:53:29,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083037362] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 18:53:29,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 18:53:29,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 18:53:29,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301291696] [2025-02-06 18:53:29,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 18:53:29,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 18:53:29,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 18:53:29,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 18:53:29,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 18:53:29,549 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 88 [2025-02-06 18:53:29,550 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) [2025-02-06 18:53:29,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 18:53:29,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 88 [2025-02-06 18:53:29,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand