./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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-mult.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e5124dd4a5a155d8a4e322a35428820633f9eccdd993e14120e650d1ba1fbebe --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:42:31,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:42:31,948 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:42:31,955 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:42:31,955 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:42:31,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:42:31,977 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:42:31,977 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:42:31,978 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:42:31,978 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:42:31,978 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:42:31,978 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:42:31,978 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:42:31,979 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:42:31,979 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:42:31,979 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:42:31,979 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:42:31,979 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:42:31,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:42:31,979 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:42:31,979 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:42:31,979 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:42:31,979 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:42:31,979 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:42:31,980 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:42:31,980 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:42:31,980 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:42:31,980 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:42:31,980 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:42:31,980 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:42:31,980 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:42:31,980 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:42:31,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:42:31,980 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:42:31,980 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:42:31,981 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:42:31,981 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:42:31,981 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:42:31,981 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:42:31,981 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:42:31,981 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:42:31,981 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:42:31,981 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:42:31,981 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5124dd4a5a155d8a4e322a35428820633f9eccdd993e14120e650d1ba1fbebe [2025-03-17 06:42:32,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:42:32,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:42:32,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:42:32,225 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:42:32,225 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:42:32,227 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2025-03-17 06:42:33,560 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/560f67a20/00d49c60b6ab4b1cbfc4ca00a621d384/FLAG600d6dff1 [2025-03-17 06:42:33,811 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:42:33,812 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c [2025-03-17 06:42:33,819 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/560f67a20/00d49c60b6ab4b1cbfc4ca00a621d384/FLAG600d6dff1 [2025-03-17 06:42:33,840 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/560f67a20/00d49c60b6ab4b1cbfc4ca00a621d384 [2025-03-17 06:42:33,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:42:33,844 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:42:33,845 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:42:33,845 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:42:33,849 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:42:33,850 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:42:33" (1/1) ... [2025-03-17 06:42:33,850 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@706b9cba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:33, skipping insertion in model container [2025-03-17 06:42:33,850 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:42:33" (1/1) ... [2025-03-17 06:42:33,868 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:42:34,023 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4270,4283] [2025-03-17 06:42:34,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:42:34,041 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:42:34,067 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult.wvr.c[4270,4283] [2025-03-17 06:42:34,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:42:34,091 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:42:34,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34 WrapperNode [2025-03-17 06:42:34,092 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:42:34,093 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:42:34,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:42:34,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:42:34,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,103 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,131 INFO L138 Inliner]: procedures = 26, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 278 [2025-03-17 06:42:34,133 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:42:34,134 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:42:34,134 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:42:34,134 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:42:34,140 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,147 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,170 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-17 06:42:34,175 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,175 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,186 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,189 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,196 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,199 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:42:34,203 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:42:34,203 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:42:34,203 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:42:34,204 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (1/1) ... [2025-03-17 06:42:34,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:42:34,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:42:34,247 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 06:42:34,253 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 06:42:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:42:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:42:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:42:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:42:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:42:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 06:42:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 06:42:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 06:42:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 06:42:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 06:42:34,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 06:42:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-17 06:42:34,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-17 06:42:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:42:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:42:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 06:42:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 06:42:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 06:42:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:42:34,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:42:34,280 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 06:42:34,389 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:42:34,391 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:42:34,816 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:42:34,816 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:42:35,113 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:42:35,118 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:42:35,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:42:35 BoogieIcfgContainer [2025-03-17 06:42:35,118 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:42:35,120 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:42:35,120 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:42:35,126 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:42:35,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:42:33" (1/3) ... [2025-03-17 06:42:35,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab0b312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:42:35, skipping insertion in model container [2025-03-17 06:42:35,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:42:34" (2/3) ... [2025-03-17 06:42:35,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab0b312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:42:35, skipping insertion in model container [2025-03-17 06:42:35,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:42:35" (3/3) ... [2025-03-17 06:42:35,132 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult.wvr.c [2025-03-17 06:42:35,151 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:42:35,153 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-mult.wvr.c that has 5 procedures, 45 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-17 06:42:35,153 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:42:35,223 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-17 06:42:35,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 50 transitions, 128 flow [2025-03-17 06:42:35,286 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2025-03-17 06:42:35,289 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 06:42:35,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 46 events. 6/46 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 82 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2025-03-17 06:42:35,292 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 50 transitions, 128 flow [2025-03-17 06:42:35,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 45 transitions, 114 flow [2025-03-17 06:42:35,302 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:42:35,315 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;@3f496ed4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:42:35,317 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-17 06:42:35,342 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:42:35,342 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2025-03-17 06:42:35,342 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-17 06:42:35,343 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:35,343 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:35,344 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:42:35,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:35,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1126177573, now seen corresponding path program 1 times [2025-03-17 06:42:35,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:35,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89707223] [2025-03-17 06:42:35,356 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:35,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:35,428 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:42:35,466 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:42:35,466 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:35,467 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:35,670 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 06:42:35,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:35,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89707223] [2025-03-17 06:42:35,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89707223] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:35,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:35,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:42:35,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934601299] [2025-03-17 06:42:35,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:35,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:42:35,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:35,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:42:35,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:42:35,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-17 06:42:35,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 06:42:35,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:35,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-17 06:42:35,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:36,639 INFO L124 PetriNetUnfolderBase]: 5628/7732 cut-off events. [2025-03-17 06:42:36,640 INFO L125 PetriNetUnfolderBase]: For 510/510 co-relation queries the response was YES. [2025-03-17 06:42:36,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15598 conditions, 7732 events. 5628/7732 cut-off events. For 510/510 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 38848 event pairs, 1634 based on Foata normal form. 1/7602 useless extension candidates. Maximal degree in co-relation 14262. Up to 4718 conditions per place. [2025-03-17 06:42:36,700 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 55 selfloop transitions, 3 changer transitions 1/68 dead transitions. [2025-03-17 06:42:36,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 68 transitions, 293 flow [2025-03-17 06:42:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:42:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:42:36,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2025-03-17 06:42:36,714 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66 [2025-03-17 06:42:36,719 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 114 flow. Second operand 3 states and 99 transitions. [2025-03-17 06:42:36,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 68 transitions, 293 flow [2025-03-17 06:42:36,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 267 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-17 06:42:36,739 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 117 flow [2025-03-17 06:42:36,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2025-03-17 06:42:36,745 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2025-03-17 06:42:36,745 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 117 flow [2025-03-17 06:42:36,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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 06:42:36,745 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:36,746 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:36,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:42:36,746 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:42:36,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:36,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1769174806, now seen corresponding path program 1 times [2025-03-17 06:42:36,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:36,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539487444] [2025-03-17 06:42:36,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:36,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:36,765 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 06:42:36,789 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 06:42:36,789 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:36,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:42:36,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:36,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539487444] [2025-03-17 06:42:36,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539487444] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:36,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:36,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:42:36,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991433322] [2025-03-17 06:42:36,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:36,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:42:36,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:36,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:42:36,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:42:36,978 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-17 06:42:36,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 06:42:36,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:36,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-17 06:42:36,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:37,783 INFO L124 PetriNetUnfolderBase]: 6878/9587 cut-off events. [2025-03-17 06:42:37,784 INFO L125 PetriNetUnfolderBase]: For 1255/1255 co-relation queries the response was YES. [2025-03-17 06:42:37,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20238 conditions, 9587 events. 6878/9587 cut-off events. For 1255/1255 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 51843 event pairs, 2262 based on Foata normal form. 231/9751 useless extension candidates. Maximal degree in co-relation 7916. Up to 6208 conditions per place. [2025-03-17 06:42:37,839 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 62 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2025-03-17 06:42:37,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 73 transitions, 311 flow [2025-03-17 06:42:37,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:42:37,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:42:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2025-03-17 06:42:37,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2025-03-17 06:42:37,841 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 117 flow. Second operand 3 states and 101 transitions. [2025-03-17 06:42:37,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 73 transitions, 311 flow [2025-03-17 06:42:37,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 73 transitions, 307 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:37,843 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 128 flow [2025-03-17 06:42:37,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2025-03-17 06:42:37,843 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2025-03-17 06:42:37,844 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 128 flow [2025-03-17 06:42:37,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 06:42:37,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:37,844 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:37,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:42:37,844 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:42:37,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1794534356, now seen corresponding path program 1 times [2025-03-17 06:42:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:37,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599646012] [2025-03-17 06:42:37,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:37,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:37,858 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 06:42:37,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 06:42:37,874 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:37,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:37,948 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 06:42:37,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:37,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599646012] [2025-03-17 06:42:37,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599646012] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:37,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:37,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:42:37,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821911756] [2025-03-17 06:42:37,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:37,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:42:37,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:37,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:42:37,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:42:37,950 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-17 06:42:37,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 06:42:37,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:37,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-17 06:42:37,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:38,722 INFO L124 PetriNetUnfolderBase]: 8266/11678 cut-off events. [2025-03-17 06:42:38,722 INFO L125 PetriNetUnfolderBase]: For 3115/3115 co-relation queries the response was YES. [2025-03-17 06:42:38,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25390 conditions, 11678 events. 8266/11678 cut-off events. For 3115/3115 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 64875 event pairs, 2562 based on Foata normal form. 162/11812 useless extension candidates. Maximal degree in co-relation 17438. Up to 7562 conditions per place. [2025-03-17 06:42:38,773 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 62 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2025-03-17 06:42:38,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 327 flow [2025-03-17 06:42:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:42:38,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:42:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2025-03-17 06:42:38,774 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66 [2025-03-17 06:42:38,774 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 128 flow. Second operand 3 states and 99 transitions. [2025-03-17 06:42:38,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 327 flow [2025-03-17 06:42:38,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:38,777 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 140 flow [2025-03-17 06:42:38,777 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2025-03-17 06:42:38,779 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2025-03-17 06:42:38,779 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 140 flow [2025-03-17 06:42:38,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 06:42:38,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:38,780 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:38,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:42:38,780 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:42:38,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:38,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1338325639, now seen corresponding path program 1 times [2025-03-17 06:42:38,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:38,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560691410] [2025-03-17 06:42:38,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:38,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:38,795 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-17 06:42:38,814 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 06:42:38,815 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:38,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:39,002 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 06:42:39,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:39,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560691410] [2025-03-17 06:42:39,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560691410] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:39,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:39,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:42:39,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837958853] [2025-03-17 06:42:39,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:39,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:42:39,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:39,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:42:39,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:42:39,005 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-17 06:42:39,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 06:42:39,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:39,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-17 06:42:39,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:40,040 INFO L124 PetriNetUnfolderBase]: 10571/15237 cut-off events. [2025-03-17 06:42:40,043 INFO L125 PetriNetUnfolderBase]: For 5594/5594 co-relation queries the response was YES. [2025-03-17 06:42:40,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34145 conditions, 15237 events. 10571/15237 cut-off events. For 5594/5594 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 91986 event pairs, 8770 based on Foata normal form. 255/15395 useless extension candidates. Maximal degree in co-relation 16863. Up to 10988 conditions per place. [2025-03-17 06:42:40,126 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 69 selfloop transitions, 5 changer transitions 0/83 dead transitions. [2025-03-17 06:42:40,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 83 transitions, 379 flow [2025-03-17 06:42:40,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 06:42:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 06:42:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2025-03-17 06:42:40,132 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.536 [2025-03-17 06:42:40,132 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 140 flow. Second operand 5 states and 134 transitions. [2025-03-17 06:42:40,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 83 transitions, 379 flow [2025-03-17 06:42:40,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 83 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:40,136 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 174 flow [2025-03-17 06:42:40,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2025-03-17 06:42:40,137 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2025-03-17 06:42:40,137 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 174 flow [2025-03-17 06:42:40,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 06:42:40,137 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:40,137 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:40,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:42:40,138 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:42:40,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:40,138 INFO L85 PathProgramCache]: Analyzing trace with hash 460350893, now seen corresponding path program 1 times [2025-03-17 06:42:40,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:40,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304257247] [2025-03-17 06:42:40,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:40,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:40,148 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-17 06:42:40,160 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 06:42:40,160 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:40,160 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:40,280 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 06:42:40,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:40,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304257247] [2025-03-17 06:42:40,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304257247] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:40,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:40,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:42:40,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266798312] [2025-03-17 06:42:40,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:40,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 06:42:40,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:40,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 06:42:40,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 06:42:40,283 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2025-03-17 06:42:40,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 06:42:40,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:40,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2025-03-17 06:42:40,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:41,535 INFO L124 PetriNetUnfolderBase]: 13578/19775 cut-off events. [2025-03-17 06:42:41,535 INFO L125 PetriNetUnfolderBase]: For 7346/7346 co-relation queries the response was YES. [2025-03-17 06:42:41,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43739 conditions, 19775 events. 13578/19775 cut-off events. For 7346/7346 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 126181 event pairs, 11518 based on Foata normal form. 385/20055 useless extension candidates. Maximal degree in co-relation 34600. Up to 14202 conditions per place. [2025-03-17 06:42:41,603 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 68 selfloop transitions, 5 changer transitions 1/83 dead transitions. [2025-03-17 06:42:41,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 410 flow [2025-03-17 06:42:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 06:42:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 06:42:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2025-03-17 06:42:41,605 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.585 [2025-03-17 06:42:41,605 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 174 flow. Second operand 4 states and 117 transitions. [2025-03-17 06:42:41,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 410 flow [2025-03-17 06:42:41,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 404 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:41,608 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 192 flow [2025-03-17 06:42:41,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2025-03-17 06:42:41,608 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2025-03-17 06:42:41,609 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 192 flow [2025-03-17 06:42:41,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 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 06:42:41,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:41,609 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:41,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:42:41,609 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:42:41,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:41,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1866976589, now seen corresponding path program 1 times [2025-03-17 06:42:41,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:41,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361571232] [2025-03-17 06:42:41,609 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:42:41,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:41,618 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-17 06:42:41,630 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:42:41,630 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:42:41,631 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:41,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:41,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361571232] [2025-03-17 06:42:41,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361571232] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:41,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:41,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:42:41,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706114145] [2025-03-17 06:42:41,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:41,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:42:41,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:41,962 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:42:41,962 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:42:41,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-17 06:42:41,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 192 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 06:42:41,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:41,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-17 06:42:41,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:43,755 INFO L124 PetriNetUnfolderBase]: 21964/30797 cut-off events. [2025-03-17 06:42:43,756 INFO L125 PetriNetUnfolderBase]: For 11217/11217 co-relation queries the response was YES. [2025-03-17 06:42:43,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70311 conditions, 30797 events. 21964/30797 cut-off events. For 11217/11217 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 197569 event pairs, 1638 based on Foata normal form. 714/30096 useless extension candidates. Maximal degree in co-relation 58449. Up to 19758 conditions per place. [2025-03-17 06:42:43,945 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 140 selfloop transitions, 11 changer transitions 3/162 dead transitions. [2025-03-17 06:42:43,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 162 transitions, 828 flow [2025-03-17 06:42:43,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:42:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:42:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2025-03-17 06:42:43,947 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6371428571428571 [2025-03-17 06:42:43,947 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 192 flow. Second operand 7 states and 223 transitions. [2025-03-17 06:42:43,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 162 transitions, 828 flow [2025-03-17 06:42:43,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 162 transitions, 818 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-17 06:42:43,952 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 255 flow [2025-03-17 06:42:43,952 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2025-03-17 06:42:43,953 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 19 predicate places. [2025-03-17 06:42:43,953 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 255 flow [2025-03-17 06:42:43,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 06:42:43,953 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:43,953 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:43,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 06:42:43,954 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:42:43,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:43,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1920524505, now seen corresponding path program 2 times [2025-03-17 06:42:43,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:43,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144805988] [2025-03-17 06:42:43,954 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:42:43,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:43,963 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-17 06:42:43,980 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 33 of 37 statements. [2025-03-17 06:42:43,980 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 06:42:43,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 06:42:44,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:44,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144805988] [2025-03-17 06:42:44,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144805988] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:44,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:44,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 06:42:44,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011669386] [2025-03-17 06:42:44,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:44,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 06:42:44,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:44,274 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 06:42:44,274 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-03-17 06:42:44,281 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-17 06:42:44,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 255 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 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 06:42:44,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:44,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-17 06:42:44,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:46,752 INFO L124 PetriNetUnfolderBase]: 22234/31892 cut-off events. [2025-03-17 06:42:46,752 INFO L125 PetriNetUnfolderBase]: For 20410/20419 co-relation queries the response was YES. [2025-03-17 06:42:46,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84272 conditions, 31892 events. 22234/31892 cut-off events. For 20410/20419 co-relation queries the response was YES. Maximal size of possible extension queue 1231. Compared 212158 event pairs, 2771 based on Foata normal form. 78/31949 useless extension candidates. Maximal degree in co-relation 69744. Up to 22936 conditions per place. [2025-03-17 06:42:46,964 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 100 selfloop transitions, 12 changer transitions 20/140 dead transitions. [2025-03-17 06:42:46,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 140 transitions, 766 flow [2025-03-17 06:42:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:42:46,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:42:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2025-03-17 06:42:46,965 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.62 [2025-03-17 06:42:46,965 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 255 flow. Second operand 6 states and 186 transitions. [2025-03-17 06:42:46,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 140 transitions, 766 flow [2025-03-17 06:42:47,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 140 transitions, 766 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:42:47,036 INFO L231 Difference]: Finished difference. Result has 80 places, 68 transitions, 322 flow [2025-03-17 06:42:47,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=80, PETRI_TRANSITIONS=68} [2025-03-17 06:42:47,037 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2025-03-17 06:42:47,037 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 322 flow [2025-03-17 06:42:47,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 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 06:42:47,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:47,037 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:47,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 06:42:47,037 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:42:47,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:47,038 INFO L85 PathProgramCache]: Analyzing trace with hash -950676185, now seen corresponding path program 3 times [2025-03-17 06:42:47,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:47,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016326943] [2025-03-17 06:42:47,038 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:42:47,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:47,054 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 2 equivalence classes. [2025-03-17 06:42:47,072 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 36 of 37 statements. [2025-03-17 06:42:47,072 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 06:42:47,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:47,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:47,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016326943] [2025-03-17 06:42:47,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016326943] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:47,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:47,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:42:47,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242623945] [2025-03-17 06:42:47,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:47,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:42:47,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:47,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:42:47,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:42:47,260 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-17 06:42:47,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 68 transitions, 322 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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 06:42:47,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:47,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-17 06:42:47,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:50,249 INFO L124 PetriNetUnfolderBase]: 28214/39841 cut-off events. [2025-03-17 06:42:50,250 INFO L125 PetriNetUnfolderBase]: For 45294/45294 co-relation queries the response was YES. [2025-03-17 06:42:50,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115469 conditions, 39841 events. 28214/39841 cut-off events. For 45294/45294 co-relation queries the response was YES. Maximal size of possible extension queue 1601. Compared 267520 event pairs, 3397 based on Foata normal form. 1620/41414 useless extension candidates. Maximal degree in co-relation 99157. Up to 13573 conditions per place. [2025-03-17 06:42:50,514 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 159 selfloop transitions, 21 changer transitions 1/189 dead transitions. [2025-03-17 06:42:50,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 189 transitions, 1209 flow [2025-03-17 06:42:50,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:42:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:42:50,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2025-03-17 06:42:50,515 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6085714285714285 [2025-03-17 06:42:50,515 INFO L175 Difference]: Start difference. First operand has 80 places, 68 transitions, 322 flow. Second operand 7 states and 213 transitions. [2025-03-17 06:42:50,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 189 transitions, 1209 flow [2025-03-17 06:42:50,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 189 transitions, 1184 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-03-17 06:42:50,570 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 441 flow [2025-03-17 06:42:50,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=441, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2025-03-17 06:42:50,570 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 35 predicate places. [2025-03-17 06:42:50,570 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 441 flow [2025-03-17 06:42:50,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 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 06:42:50,571 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:42:50,571 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:42:50,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 06:42:50,571 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:42:50,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:42:50,571 INFO L85 PathProgramCache]: Analyzing trace with hash -874169443, now seen corresponding path program 4 times [2025-03-17 06:42:50,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:42:50,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259831678] [2025-03-17 06:42:50,572 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:42:50,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:42:50,582 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-17 06:42:50,596 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:42:50,596 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:42:50,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:42:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:42:50,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:42:50,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259831678] [2025-03-17 06:42:50,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259831678] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:42:50,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:42:50,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:42:50,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107270222] [2025-03-17 06:42:50,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:42:50,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:42:50,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:42:50,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:42:50,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:42:50,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 50 [2025-03-17 06:42:50,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 441 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 06:42:50,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:42:50,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 50 [2025-03-17 06:42:50,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:42:58,241 INFO L124 PetriNetUnfolderBase]: 73970/101569 cut-off events. [2025-03-17 06:42:58,241 INFO L125 PetriNetUnfolderBase]: For 153403/153406 co-relation queries the response was YES. [2025-03-17 06:42:58,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321323 conditions, 101569 events. 73970/101569 cut-off events. For 153403/153406 co-relation queries the response was YES. Maximal size of possible extension queue 3751. Compared 695261 event pairs, 12991 based on Foata normal form. 1057/102607 useless extension candidates. Maximal degree in co-relation 290397. Up to 58361 conditions per place. [2025-03-17 06:42:59,261 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 188 selfloop transitions, 48 changer transitions 6/251 dead transitions. [2025-03-17 06:42:59,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 251 transitions, 1708 flow [2025-03-17 06:42:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:42:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:42:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 276 transitions. [2025-03-17 06:42:59,263 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2025-03-17 06:42:59,263 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 441 flow. Second operand 9 states and 276 transitions. [2025-03-17 06:42:59,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 251 transitions, 1708 flow [2025-03-17 06:43:00,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 251 transitions, 1706 flow, removed 1 selfloop flow, removed 0 redundant places. [2025-03-17 06:43:00,285 INFO L231 Difference]: Finished difference. Result has 101 places, 125 transitions, 944 flow [2025-03-17 06:43:00,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=944, PETRI_PLACES=101, PETRI_TRANSITIONS=125} [2025-03-17 06:43:00,286 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 49 predicate places. [2025-03-17 06:43:00,286 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 125 transitions, 944 flow [2025-03-17 06:43:00,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 06:43:00,286 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:00,286 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:00,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-17 06:43:00,286 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:00,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:00,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1217420765, now seen corresponding path program 5 times [2025-03-17 06:43:00,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:00,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818603596] [2025-03-17 06:43:00,287 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:43:00,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:00,297 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-17 06:43:00,307 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-03-17 06:43:00,307 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:43:00,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:00,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:00,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818603596] [2025-03-17 06:43:00,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818603596] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:00,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:00,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:43:00,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997512772] [2025-03-17 06:43:00,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:00,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:43:00,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:00,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:43:00,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:43:00,578 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-17 06:43:00,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 125 transitions, 944 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 06:43:00,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:00,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-17 06:43:00,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:43:10,341 INFO L124 PetriNetUnfolderBase]: 74547/109750 cut-off events. [2025-03-17 06:43:10,341 INFO L125 PetriNetUnfolderBase]: For 383140/383308 co-relation queries the response was YES. [2025-03-17 06:43:11,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428358 conditions, 109750 events. 74547/109750 cut-off events. For 383140/383308 co-relation queries the response was YES. Maximal size of possible extension queue 4859. Compared 876454 event pairs, 9752 based on Foata normal form. 590/109092 useless extension candidates. Maximal degree in co-relation 396272. Up to 45201 conditions per place. [2025-03-17 06:43:11,760 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 338 selfloop transitions, 98 changer transitions 1/448 dead transitions. [2025-03-17 06:43:11,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 448 transitions, 4555 flow [2025-03-17 06:43:11,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 06:43:11,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 06:43:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2025-03-17 06:43:11,761 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6114285714285714 [2025-03-17 06:43:11,761 INFO L175 Difference]: Start difference. First operand has 101 places, 125 transitions, 944 flow. Second operand 7 states and 214 transitions. [2025-03-17 06:43:11,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 448 transitions, 4555 flow [2025-03-17 06:43:17,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 448 transitions, 4509 flow, removed 23 selfloop flow, removed 0 redundant places. [2025-03-17 06:43:17,670 INFO L231 Difference]: Finished difference. Result has 112 places, 224 transitions, 2104 flow [2025-03-17 06:43:17,671 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=934, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2104, PETRI_PLACES=112, PETRI_TRANSITIONS=224} [2025-03-17 06:43:17,671 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 60 predicate places. [2025-03-17 06:43:17,671 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 224 transitions, 2104 flow [2025-03-17 06:43:17,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 06:43:17,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:43:17,672 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:43:17,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 06:43:17,672 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-17 06:43:17,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:43:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash -584091651, now seen corresponding path program 6 times [2025-03-17 06:43:17,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:43:17,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724628707] [2025-03-17 06:43:17,672 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 06:43:17,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:43:17,683 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 2 equivalence classes. [2025-03-17 06:43:17,693 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 36 of 37 statements. [2025-03-17 06:43:17,694 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-17 06:43:17,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:43:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 06:43:17,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:43:17,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724628707] [2025-03-17 06:43:17,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724628707] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:43:17,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:43:17,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 06:43:17,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396967301] [2025-03-17 06:43:17,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:43:17,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 06:43:17,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:43:17,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 06:43:17,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 06:43:17,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 50 [2025-03-17 06:43:17,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 224 transitions, 2104 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 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 06:43:17,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:43:17,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 50 [2025-03-17 06:43:17,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand