./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.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 dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 17:35:09,955 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 17:35:10,008 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-08 17:35:10,012 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 17:35:10,014 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 17:35:10,034 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 17:35:10,034 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 17:35:10,034 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 17:35:10,035 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-08 17:35:10,035 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-08 17:35:10,036 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 17:35:10,036 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 17:35:10,036 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 17:35:10,036 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 17:35:10,036 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 17:35:10,037 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 17:35:10,037 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 17:35:10,037 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 17:35:10,037 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 17:35:10,037 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 17:35:10,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 17:35:10,037 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 17:35:10,037 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 17:35:10,037 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 17:35:10,037 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 17:35:10,038 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 17:35:10,038 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 17:35:10,038 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 17:35:10,038 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 17:35:10,038 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 17:35:10,038 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-08 17:35:10,038 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 17:35:10,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:35:10,038 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 17:35:10,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 17:35:10,039 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 17:35:10,039 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 17:35:10,039 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 17:35:10,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 17:35:10,039 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 17:35:10,039 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 17:35:10,039 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 17:35:10,039 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 17:35:10,039 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 -> dbff9cba9b3794b18d55ca52c1abf6279404a7b220f91d79730a04b586f9ee44 [2025-03-08 17:35:10,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 17:35:10,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 17:35:10,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 17:35:10,265 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 17:35:10,266 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 17:35:10,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2025-03-08 17:35:11,418 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/995f4df9f/d0d738ef616d4810a116ecfa003ef101/FLAG98ae02bf6 [2025-03-08 17:35:11,661 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 17:35:11,665 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2025-03-08 17:35:11,690 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/995f4df9f/d0d738ef616d4810a116ecfa003ef101/FLAG98ae02bf6 [2025-03-08 17:35:11,989 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/995f4df9f/d0d738ef616d4810a116ecfa003ef101 [2025-03-08 17:35:11,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 17:35:11,992 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 17:35:11,993 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 17:35:11,993 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 17:35:11,997 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 17:35:11,998 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:35:11" (1/1) ... [2025-03-08 17:35:11,999 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f6ac0aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:11, skipping insertion in model container [2025-03-08 17:35:12,000 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 05:35:11" (1/1) ... [2025-03-08 17:35:12,014 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 17:35:12,144 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-mult2.wvr.c[4151,4164] [2025-03-08 17:35:12,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:35:12,159 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 17:35:12,177 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-mult2.wvr.c[4151,4164] [2025-03-08 17:35:12,179 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 17:35:12,189 INFO L204 MainTranslator]: Completed translation [2025-03-08 17:35:12,189 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12 WrapperNode [2025-03-08 17:35:12,189 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 17:35:12,190 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 17:35:12,190 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 17:35:12,190 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 17:35:12,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (1/1) ... [2025-03-08 17:35:12,197 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (1/1) ... [2025-03-08 17:35:12,221 INFO L138 Inliner]: procedures = 26, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 274 [2025-03-08 17:35:12,221 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 17:35:12,222 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 17:35:12,222 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 17:35:12,222 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 17:35:12,227 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (1/1) ... [2025-03-08 17:35:12,227 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (1/1) ... [2025-03-08 17:35:12,234 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (1/1) ... [2025-03-08 17:35:12,251 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2025-03-08 17:35:12,254 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (1/1) ... [2025-03-08 17:35:12,255 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (1/1) ... [2025-03-08 17:35:12,263 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (1/1) ... [2025-03-08 17:35:12,264 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (1/1) ... [2025-03-08 17:35:12,268 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (1/1) ... [2025-03-08 17:35:12,268 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (1/1) ... [2025-03-08 17:35:12,271 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 17:35:12,273 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 17:35:12,274 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 17:35:12,274 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 17:35:12,274 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (1/1) ... [2025-03-08 17:35:12,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 17:35:12,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 17:35:12,299 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 17:35:12,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 17:35:12,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 17:35:12,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-08 17:35:12,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-08 17:35:12,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-08 17:35:12,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-08 17:35:12,320 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-08 17:35:12,320 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-08 17:35:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-08 17:35:12,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-08 17:35:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-08 17:35:12,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-08 17:35:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-03-08 17:35:12,321 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-03-08 17:35:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-08 17:35:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-08 17:35:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 17:35:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 17:35:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-08 17:35:12,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 17:35:12,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 17:35:12,322 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 17:35:12,408 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 17:35:12,410 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 17:35:12,729 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 17:35:12,730 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 17:35:12,978 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 17:35:12,978 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 17:35:12,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:35:12 BoogieIcfgContainer [2025-03-08 17:35:12,979 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 17:35:12,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 17:35:12,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 17:35:12,984 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 17:35:12,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 05:35:11" (1/3) ... [2025-03-08 17:35:12,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7564e919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:35:12, skipping insertion in model container [2025-03-08 17:35:12,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 05:35:12" (2/3) ... [2025-03-08 17:35:12,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7564e919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 05:35:12, skipping insertion in model container [2025-03-08 17:35:12,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 05:35:12" (3/3) ... [2025-03-08 17:35:12,985 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2025-03-08 17:35:12,997 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 17:35:12,998 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-mult2.wvr.c that has 5 procedures, 43 locations, 1 initial locations, 6 loop locations, and 1 error locations. [2025-03-08 17:35:12,998 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 17:35:13,050 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-08 17:35:13,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 48 transitions, 124 flow [2025-03-08 17:35:13,102 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2025-03-08 17:35:13,104 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:35:13,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 44 events. 6/44 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 70 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2025-03-08 17:35:13,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 48 transitions, 124 flow [2025-03-08 17:35:13,108 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 43 transitions, 110 flow [2025-03-08 17:35:13,116 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 17:35:13,128 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;@2b09524d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 17:35:13,130 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-03-08 17:35:13,142 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 17:35:13,142 INFO L124 PetriNetUnfolderBase]: 6/42 cut-off events. [2025-03-08 17:35:13,142 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 17:35:13,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:13,144 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:13,144 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:35:13,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:13,148 INFO L85 PathProgramCache]: Analyzing trace with hash 387359366, now seen corresponding path program 1 times [2025-03-08 17:35:13,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:13,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005390909] [2025-03-08 17:35:13,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:13,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:13,217 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-08 17:35:13,267 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-08 17:35:13,267 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:13,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:35:13,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:13,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005390909] [2025-03-08 17:35:13,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005390909] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:13,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:13,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:35:13,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847442855] [2025-03-08 17:35:13,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:13,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:35:13,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:13,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:35:13,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:35:13,436 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-08 17:35:13,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 110 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) [2025-03-08 17:35:13,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:13,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-08 17:35:13,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:13,963 INFO L124 PetriNetUnfolderBase]: 3682/5092 cut-off events. [2025-03-08 17:35:13,963 INFO L125 PetriNetUnfolderBase]: For 390/390 co-relation queries the response was YES. [2025-03-08 17:35:13,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10276 conditions, 5092 events. 3682/5092 cut-off events. For 390/390 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24505 event pairs, 1024 based on Foata normal form. 1/4973 useless extension candidates. Maximal degree in co-relation 9160. Up to 3095 conditions per place. [2025-03-08 17:35:13,999 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 51 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2025-03-08 17:35:13,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 277 flow [2025-03-08 17:35:14,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:35:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:35:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2025-03-08 17:35:14,009 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2025-03-08 17:35:14,010 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 110 flow. Second operand 3 states and 95 transitions. [2025-03-08 17:35:14,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 277 flow [2025-03-08 17:35:14,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 64 transitions, 251 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-08 17:35:14,023 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 113 flow [2025-03-08 17:35:14,024 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2025-03-08 17:35:14,027 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2025-03-08 17:35:14,027 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 113 flow [2025-03-08 17:35:14,027 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) [2025-03-08 17:35:14,027 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:14,027 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:14,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 17:35:14,027 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:35:14,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:14,028 INFO L85 PathProgramCache]: Analyzing trace with hash -326755222, now seen corresponding path program 1 times [2025-03-08 17:35:14,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:14,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040537556] [2025-03-08 17:35:14,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:14,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:14,045 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 17:35:14,072 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 17:35:14,072 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:14,072 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:35:14,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:14,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040537556] [2025-03-08 17:35:14,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040537556] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:14,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:14,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:35:14,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738249725] [2025-03-08 17:35:14,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:14,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:35:14,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:14,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:35:14,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:35:14,223 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-08 17:35:14,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 113 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) [2025-03-08 17:35:14,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:14,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-08 17:35:14,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:14,720 INFO L124 PetriNetUnfolderBase]: 4690/6606 cut-off events. [2025-03-08 17:35:14,720 INFO L125 PetriNetUnfolderBase]: For 889/889 co-relation queries the response was YES. [2025-03-08 17:35:14,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13877 conditions, 6606 events. 4690/6606 cut-off events. For 889/889 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 34764 event pairs, 1685 based on Foata normal form. 186/6713 useless extension candidates. Maximal degree in co-relation 5583. Up to 3904 conditions per place. [2025-03-08 17:35:14,750 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 59 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2025-03-08 17:35:14,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 70 transitions, 299 flow [2025-03-08 17:35:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:35:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:35:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2025-03-08 17:35:14,751 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6805555555555556 [2025-03-08 17:35:14,752 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 113 flow. Second operand 3 states and 98 transitions. [2025-03-08 17:35:14,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 70 transitions, 299 flow [2025-03-08 17:35:14,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 70 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:14,753 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 124 flow [2025-03-08 17:35:14,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=110, 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=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2025-03-08 17:35:14,754 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2025-03-08 17:35:14,754 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 124 flow [2025-03-08 17:35:14,754 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) [2025-03-08 17:35:14,754 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:14,754 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:14,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 17:35:14,754 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:35:14,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:14,757 INFO L85 PathProgramCache]: Analyzing trace with hash -346867952, now seen corresponding path program 1 times [2025-03-08 17:35:14,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:14,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222834422] [2025-03-08 17:35:14,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:14,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:14,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-08 17:35:14,787 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-08 17:35:14,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:14,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:35:14,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:14,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222834422] [2025-03-08 17:35:14,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222834422] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:14,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:14,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 17:35:14,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468301713] [2025-03-08 17:35:14,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:14,887 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 17:35:14,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:14,888 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 17:35:14,888 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 17:35:14,888 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-08 17:35:14,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 124 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) [2025-03-08 17:35:14,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:14,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-08 17:35:14,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:15,375 INFO L124 PetriNetUnfolderBase]: 5824/8334 cut-off events. [2025-03-08 17:35:15,376 INFO L125 PetriNetUnfolderBase]: For 2271/2271 co-relation queries the response was YES. [2025-03-08 17:35:15,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18102 conditions, 8334 events. 5824/8334 cut-off events. For 2271/2271 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 45364 event pairs, 2031 based on Foata normal form. 138/8399 useless extension candidates. Maximal degree in co-relation 11513. Up to 4926 conditions per place. [2025-03-08 17:35:15,408 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 59 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2025-03-08 17:35:15,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 70 transitions, 315 flow [2025-03-08 17:35:15,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 17:35:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 17:35:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2025-03-08 17:35:15,410 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-03-08 17:35:15,410 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 124 flow. Second operand 3 states and 96 transitions. [2025-03-08 17:35:15,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 70 transitions, 315 flow [2025-03-08 17:35:15,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:15,412 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 136 flow [2025-03-08 17:35:15,412 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2025-03-08 17:35:15,412 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2025-03-08 17:35:15,412 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 136 flow [2025-03-08 17:35:15,413 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) [2025-03-08 17:35:15,413 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:15,413 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:15,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 17:35:15,413 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:35:15,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:15,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1439369264, now seen corresponding path program 1 times [2025-03-08 17:35:15,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:15,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140082909] [2025-03-08 17:35:15,414 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:15,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:15,423 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 17:35:15,438 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 17:35:15,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:15,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:35:15,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:15,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140082909] [2025-03-08 17:35:15,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140082909] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:15,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:15,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 17:35:15,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607516784] [2025-03-08 17:35:15,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:15,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:35:15,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:15,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:35:15,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:35:15,563 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-08 17:35:15,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:15,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:15,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-08 17:35:15,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:16,242 INFO L124 PetriNetUnfolderBase]: 7723/11129 cut-off events. [2025-03-08 17:35:16,242 INFO L125 PetriNetUnfolderBase]: For 4137/4137 co-relation queries the response was YES. [2025-03-08 17:35:16,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25176 conditions, 11129 events. 7723/11129 cut-off events. For 4137/4137 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 64407 event pairs, 6327 based on Foata normal form. 211/11226 useless extension candidates. Maximal degree in co-relation 13290. Up to 7786 conditions per place. [2025-03-08 17:35:16,280 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 66 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2025-03-08 17:35:16,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 80 transitions, 367 flow [2025-03-08 17:35:16,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-08 17:35:16,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-08 17:35:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2025-03-08 17:35:16,281 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5458333333333333 [2025-03-08 17:35:16,281 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 136 flow. Second operand 5 states and 131 transitions. [2025-03-08 17:35:16,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 80 transitions, 367 flow [2025-03-08 17:35:16,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 80 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:16,283 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 170 flow [2025-03-08 17:35:16,284 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2025-03-08 17:35:16,284 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2025-03-08 17:35:16,284 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 170 flow [2025-03-08 17:35:16,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:16,284 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:16,284 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:16,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 17:35:16,285 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:35:16,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:16,285 INFO L85 PathProgramCache]: Analyzing trace with hash -499416312, now seen corresponding path program 1 times [2025-03-08 17:35:16,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:16,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083724766] [2025-03-08 17:35:16,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:16,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:16,293 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 17:35:16,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 17:35:16,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:16,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 17:35:16,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:16,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083724766] [2025-03-08 17:35:16,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083724766] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:16,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:16,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-08 17:35:16,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613447298] [2025-03-08 17:35:16,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:16,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-08 17:35:16,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:16,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-08 17:35:16,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-08 17:35:16,399 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-03-08 17:35:16,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:16,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:16,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-03-08 17:35:16,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:17,242 INFO L124 PetriNetUnfolderBase]: 10316/15076 cut-off events. [2025-03-08 17:35:17,242 INFO L125 PetriNetUnfolderBase]: For 5648/5648 co-relation queries the response was YES. [2025-03-08 17:35:17,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33501 conditions, 15076 events. 10316/15076 cut-off events. For 5648/5648 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 93183 event pairs, 8685 based on Foata normal form. 335/15271 useless extension candidates. Maximal degree in co-relation 25633. Up to 10444 conditions per place. [2025-03-08 17:35:17,312 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 65 selfloop transitions, 5 changer transitions 1/80 dead transitions. [2025-03-08 17:35:17,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 80 transitions, 398 flow [2025-03-08 17:35:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-08 17:35:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-08 17:35:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2025-03-08 17:35:17,314 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2025-03-08 17:35:17,314 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 170 flow. Second operand 4 states and 114 transitions. [2025-03-08 17:35:17,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 80 transitions, 398 flow [2025-03-08 17:35:17,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 392 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:17,317 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 188 flow [2025-03-08 17:35:17,317 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2025-03-08 17:35:17,320 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2025-03-08 17:35:17,320 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 188 flow [2025-03-08 17:35:17,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:17,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:17,320 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:17,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-08 17:35:17,320 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:35:17,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:17,322 INFO L85 PathProgramCache]: Analyzing trace with hash -778231960, now seen corresponding path program 1 times [2025-03-08 17:35:17,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:17,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171842480] [2025-03-08 17:35:17,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:17,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:17,336 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 17:35:17,367 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 17:35:17,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:17,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:35:17,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:17,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171842480] [2025-03-08 17:35:17,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171842480] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:17,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:17,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:17,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413260812] [2025-03-08 17:35:17,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:17,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:35:17,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:17,789 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:35:17,789 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:35:17,799 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2025-03-08 17:35:17,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:17,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:17,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2025-03-08 17:35:17,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:19,389 INFO L124 PetriNetUnfolderBase]: 21444/30133 cut-off events. [2025-03-08 17:35:19,389 INFO L125 PetriNetUnfolderBase]: For 9360/9370 co-relation queries the response was YES. [2025-03-08 17:35:19,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68065 conditions, 30133 events. 21444/30133 cut-off events. For 9360/9370 co-relation queries the response was YES. Maximal size of possible extension queue 1079. Compared 189390 event pairs, 3781 based on Foata normal form. 4/26703 useless extension candidates. Maximal degree in co-relation 51320. Up to 18522 conditions per place. [2025-03-08 17:35:19,477 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 123 selfloop transitions, 11 changer transitions 6/147 dead transitions. [2025-03-08 17:35:19,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 147 transitions, 716 flow [2025-03-08 17:35:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:35:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:35:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2025-03-08 17:35:19,478 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2025-03-08 17:35:19,478 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 188 flow. Second operand 7 states and 209 transitions. [2025-03-08 17:35:19,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 147 transitions, 716 flow [2025-03-08 17:35:19,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 147 transitions, 706 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-08 17:35:19,482 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 275 flow [2025-03-08 17:35:19,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=275, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2025-03-08 17:35:19,483 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2025-03-08 17:35:19,483 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 275 flow [2025-03-08 17:35:19,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:19,483 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:19,483 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:19,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-08 17:35:19,483 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:35:19,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:19,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1483206076, now seen corresponding path program 1 times [2025-03-08 17:35:19,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:19,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798945159] [2025-03-08 17:35:19,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 17:35:19,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:19,492 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 17:35:19,513 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 17:35:19,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:19,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:35:19,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:19,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798945159] [2025-03-08 17:35:19,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798945159] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:19,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:19,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 17:35:19,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626796988] [2025-03-08 17:35:19,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:19,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:35:19,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:19,760 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:35:19,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:35:19,766 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-08 17:35:19,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 275 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:19,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:19,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-08 17:35:19,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:21,556 INFO L124 PetriNetUnfolderBase]: 17978/26390 cut-off events. [2025-03-08 17:35:21,556 INFO L125 PetriNetUnfolderBase]: For 23545/23558 co-relation queries the response was YES. [2025-03-08 17:35:21,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70162 conditions, 26390 events. 17978/26390 cut-off events. For 23545/23558 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 175377 event pairs, 4435 based on Foata normal form. 80/26273 useless extension candidates. Maximal degree in co-relation 53426. Up to 19397 conditions per place. [2025-03-08 17:35:21,692 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 84 selfloop transitions, 10 changer transitions 21/124 dead transitions. [2025-03-08 17:35:21,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 124 transitions, 704 flow [2025-03-08 17:35:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:35:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:35:21,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2025-03-08 17:35:21,693 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2025-03-08 17:35:21,693 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 275 flow. Second operand 6 states and 172 transitions. [2025-03-08 17:35:21,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 124 transitions, 704 flow [2025-03-08 17:35:21,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 124 transitions, 704 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 17:35:21,795 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 340 flow [2025-03-08 17:35:21,796 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=340, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2025-03-08 17:35:21,796 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2025-03-08 17:35:21,796 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 340 flow [2025-03-08 17:35:21,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:21,797 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:21,797 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:21,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-08 17:35:21,797 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)] === [2025-03-08 17:35:21,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:21,798 INFO L85 PathProgramCache]: Analyzing trace with hash -628800122, now seen corresponding path program 2 times [2025-03-08 17:35:21,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:21,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082672903] [2025-03-08 17:35:21,798 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:35:21,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:21,809 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-08 17:35:21,826 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 35 of 36 statements. [2025-03-08 17:35:21,826 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:35:21,826 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:22,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:35:22,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:22,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082672903] [2025-03-08 17:35:22,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082672903] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:22,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:22,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:22,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269505535] [2025-03-08 17:35:22,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:22,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:35:22,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:22,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:35:22,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:35:22,111 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-08 17:35:22,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:22,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:22,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-08 17:35:22,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:23,554 INFO L124 PetriNetUnfolderBase]: 17911/26134 cut-off events. [2025-03-08 17:35:23,554 INFO L125 PetriNetUnfolderBase]: For 30534/30534 co-relation queries the response was YES. [2025-03-08 17:35:23,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75378 conditions, 26134 events. 17911/26134 cut-off events. For 30534/30534 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 171940 event pairs, 4259 based on Foata normal form. 72/26019 useless extension candidates. Maximal degree in co-relation 57316. Up to 19573 conditions per place. [2025-03-08 17:35:23,693 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 88 selfloop transitions, 17 changer transitions 4/118 dead transitions. [2025-03-08 17:35:23,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 118 transitions, 759 flow [2025-03-08 17:35:23,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 17:35:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 17:35:23,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2025-03-08 17:35:23,694 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2025-03-08 17:35:23,694 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 340 flow. Second operand 6 states and 165 transitions. [2025-03-08 17:35:23,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 118 transitions, 759 flow [2025-03-08 17:35:23,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 118 transitions, 745 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-08 17:35:23,858 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 455 flow [2025-03-08 17:35:23,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=455, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2025-03-08 17:35:23,859 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2025-03-08 17:35:23,859 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 455 flow [2025-03-08 17:35:23,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:23,859 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:23,859 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:23,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-08 17:35:23,860 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)] === [2025-03-08 17:35:23,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:23,860 INFO L85 PathProgramCache]: Analyzing trace with hash -880844368, now seen corresponding path program 3 times [2025-03-08 17:35:23,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:23,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829545120] [2025-03-08 17:35:23,860 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-08 17:35:23,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:23,873 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 36 statements into 2 equivalence classes. [2025-03-08 17:35:23,886 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 17:35:23,887 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-08 17:35:23,887 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:35:24,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:24,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829545120] [2025-03-08 17:35:24,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829545120] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:24,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:24,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:24,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150966096] [2025-03-08 17:35:24,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:24,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:35:24,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:24,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:35:24,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:35:24,094 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-08 17:35:24,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:24,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:24,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-08 17:35:24,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:25,596 INFO L124 PetriNetUnfolderBase]: 19110/28494 cut-off events. [2025-03-08 17:35:25,596 INFO L125 PetriNetUnfolderBase]: For 51498/51523 co-relation queries the response was YES. [2025-03-08 17:35:25,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87052 conditions, 28494 events. 19110/28494 cut-off events. For 51498/51523 co-relation queries the response was YES. Maximal size of possible extension queue 1149. Compared 195630 event pairs, 6417 based on Foata normal form. 214/28332 useless extension candidates. Maximal degree in co-relation 65787. Up to 20353 conditions per place. [2025-03-08 17:35:25,769 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 82 selfloop transitions, 29 changer transitions 34/154 dead transitions. [2025-03-08 17:35:25,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 154 transitions, 1265 flow [2025-03-08 17:35:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:35:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:35:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2025-03-08 17:35:25,771 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2025-03-08 17:35:25,771 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 455 flow. Second operand 7 states and 191 transitions. [2025-03-08 17:35:25,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 154 transitions, 1265 flow [2025-03-08 17:35:26,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 154 transitions, 1230 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:35:26,141 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 734 flow [2025-03-08 17:35:26,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2025-03-08 17:35:26,142 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2025-03-08 17:35:26,142 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 734 flow [2025-03-08 17:35:26,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:26,142 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:26,142 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:26,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-08 17:35:26,142 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)] === [2025-03-08 17:35:26,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:26,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1651095884, now seen corresponding path program 4 times [2025-03-08 17:35:26,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:26,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616305110] [2025-03-08 17:35:26,143 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-08 17:35:26,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:26,152 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 36 statements into 2 equivalence classes. [2025-03-08 17:35:26,166 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 17:35:26,167 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-08 17:35:26,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:35:26,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:26,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616305110] [2025-03-08 17:35:26,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616305110] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:26,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:26,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:26,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690820080] [2025-03-08 17:35:26,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:26,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:35:26,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:26,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:35:26,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:35:26,345 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-08 17:35:26,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 734 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:26,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:26,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-08 17:35:26,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:28,355 INFO L124 PetriNetUnfolderBase]: 19325/28407 cut-off events. [2025-03-08 17:35:28,355 INFO L125 PetriNetUnfolderBase]: For 64168/64168 co-relation queries the response was YES. [2025-03-08 17:35:28,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96176 conditions, 28407 events. 19325/28407 cut-off events. For 64168/64168 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 193859 event pairs, 2498 based on Foata normal form. 532/28700 useless extension candidates. Maximal degree in co-relation 74311. Up to 13544 conditions per place. [2025-03-08 17:35:28,512 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 136 selfloop transitions, 49 changer transitions 4/198 dead transitions. [2025-03-08 17:35:28,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 198 transitions, 1640 flow [2025-03-08 17:35:28,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:35:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:35:28,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2025-03-08 17:35:28,513 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6119791666666666 [2025-03-08 17:35:28,513 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 734 flow. Second operand 8 states and 235 transitions. [2025-03-08 17:35:28,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 198 transitions, 1640 flow [2025-03-08 17:35:29,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 198 transitions, 1584 flow, removed 11 selfloop flow, removed 3 redundant places. [2025-03-08 17:35:29,135 INFO L231 Difference]: Finished difference. Result has 97 places, 106 transitions, 1027 flow [2025-03-08 17:35:29,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=698, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1027, PETRI_PLACES=97, PETRI_TRANSITIONS=106} [2025-03-08 17:35:29,135 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2025-03-08 17:35:29,135 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 106 transitions, 1027 flow [2025-03-08 17:35:29,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:29,136 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:29,136 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:29,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-08 17:35:29,136 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)] === [2025-03-08 17:35:29,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:29,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1341189242, now seen corresponding path program 5 times [2025-03-08 17:35:29,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:29,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130143308] [2025-03-08 17:35:29,136 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-08 17:35:29,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:29,145 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 36 statements into 3 equivalence classes. [2025-03-08 17:35:29,153 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 17:35:29,153 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-03-08 17:35:29,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:35:29,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:29,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130143308] [2025-03-08 17:35:29,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130143308] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:29,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:29,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 17:35:29,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533145000] [2025-03-08 17:35:29,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:29,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:35:29,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:29,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:35:29,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:35:29,396 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2025-03-08 17:35:29,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 106 transitions, 1027 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:29,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:29,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2025-03-08 17:35:29,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:32,474 INFO L124 PetriNetUnfolderBase]: 30246/41997 cut-off events. [2025-03-08 17:35:32,474 INFO L125 PetriNetUnfolderBase]: For 96145/96163 co-relation queries the response was YES. [2025-03-08 17:35:32,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143683 conditions, 41997 events. 30246/41997 cut-off events. For 96145/96163 co-relation queries the response was YES. Maximal size of possible extension queue 1542. Compared 274486 event pairs, 1522 based on Foata normal form. 181/42105 useless extension candidates. Maximal degree in co-relation 126724. Up to 16326 conditions per place. [2025-03-08 17:35:32,771 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 189 selfloop transitions, 36 changer transitions 4/236 dead transitions. [2025-03-08 17:35:32,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 236 transitions, 2258 flow [2025-03-08 17:35:32,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:35:32,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:35:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2025-03-08 17:35:32,772 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2025-03-08 17:35:32,772 INFO L175 Difference]: Start difference. First operand has 97 places, 106 transitions, 1027 flow. Second operand 7 states and 216 transitions. [2025-03-08 17:35:32,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 236 transitions, 2258 flow [2025-03-08 17:35:33,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 236 transitions, 2208 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-03-08 17:35:33,741 INFO L231 Difference]: Finished difference. Result has 104 places, 114 transitions, 1188 flow [2025-03-08 17:35:33,741 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1188, PETRI_PLACES=104, PETRI_TRANSITIONS=114} [2025-03-08 17:35:33,741 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2025-03-08 17:35:33,742 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 114 transitions, 1188 flow [2025-03-08 17:35:33,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:33,742 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:33,742 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:33,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-08 17:35:33,742 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:35:33,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:33,743 INFO L85 PathProgramCache]: Analyzing trace with hash 110199476, now seen corresponding path program 6 times [2025-03-08 17:35:33,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:33,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407398070] [2025-03-08 17:35:33,743 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-08 17:35:33,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:33,751 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 36 statements into 2 equivalence classes. [2025-03-08 17:35:33,762 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 32 of 36 statements. [2025-03-08 17:35:33,762 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-08 17:35:33,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-08 17:35:34,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:34,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407398070] [2025-03-08 17:35:34,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407398070] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:34,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:34,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:34,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968347355] [2025-03-08 17:35:34,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:34,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:35:34,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:34,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:35:34,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:35:34,178 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-08 17:35:34,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 114 transitions, 1188 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:34,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:34,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-08 17:35:34,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:37,927 INFO L124 PetriNetUnfolderBase]: 30487/45564 cut-off events. [2025-03-08 17:35:37,927 INFO L125 PetriNetUnfolderBase]: For 154479/154632 co-relation queries the response was YES. [2025-03-08 17:35:38,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169765 conditions, 45564 events. 30487/45564 cut-off events. For 154479/154632 co-relation queries the response was YES. Maximal size of possible extension queue 1896. Compared 338923 event pairs, 8295 based on Foata normal form. 609/45947 useless extension candidates. Maximal degree in co-relation 138679. Up to 28767 conditions per place. [2025-03-08 17:35:38,326 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 152 selfloop transitions, 59 changer transitions 6/227 dead transitions. [2025-03-08 17:35:38,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 227 transitions, 2540 flow [2025-03-08 17:35:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:35:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:35:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2025-03-08 17:35:38,327 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2025-03-08 17:35:38,327 INFO L175 Difference]: Start difference. First operand has 104 places, 114 transitions, 1188 flow. Second operand 7 states and 208 transitions. [2025-03-08 17:35:38,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 227 transitions, 2540 flow [2025-03-08 17:35:39,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 227 transitions, 2525 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-08 17:35:39,685 INFO L231 Difference]: Finished difference. Result has 112 places, 136 transitions, 1763 flow [2025-03-08 17:35:39,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1763, PETRI_PLACES=112, PETRI_TRANSITIONS=136} [2025-03-08 17:35:39,686 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 62 predicate places. [2025-03-08 17:35:39,686 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 136 transitions, 1763 flow [2025-03-08 17:35:39,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:39,686 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:39,686 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:39,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-03-08 17:35:39,687 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:35:39,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1882225138, now seen corresponding path program 7 times [2025-03-08 17:35:39,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:39,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352082621] [2025-03-08 17:35:39,687 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-08 17:35:39,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:39,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-08 17:35:39,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-08 17:35:39,709 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 17:35:39,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:35:40,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:40,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352082621] [2025-03-08 17:35:40,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352082621] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:40,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:40,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 17:35:40,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59559585] [2025-03-08 17:35:40,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:40,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 17:35:40,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:40,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 17:35:40,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2025-03-08 17:35:40,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-08 17:35:40,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 136 transitions, 1763 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:40,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:40,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-08 17:35:40,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:44,852 INFO L124 PetriNetUnfolderBase]: 38079/56015 cut-off events. [2025-03-08 17:35:44,852 INFO L125 PetriNetUnfolderBase]: For 245575/247077 co-relation queries the response was YES. [2025-03-08 17:35:45,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217830 conditions, 56015 events. 38079/56015 cut-off events. For 245575/247077 co-relation queries the response was YES. Maximal size of possible extension queue 2348. Compared 416305 event pairs, 10802 based on Foata normal form. 1844/53690 useless extension candidates. Maximal degree in co-relation 176139. Up to 40683 conditions per place. [2025-03-08 17:35:45,236 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 158 selfloop transitions, 176 changer transitions 19/366 dead transitions. [2025-03-08 17:35:45,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 366 transitions, 6135 flow [2025-03-08 17:35:45,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-08 17:35:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-08 17:35:45,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2025-03-08 17:35:45,237 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-08 17:35:45,237 INFO L175 Difference]: Start difference. First operand has 112 places, 136 transitions, 1763 flow. Second operand 7 states and 196 transitions. [2025-03-08 17:35:45,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 366 transitions, 6135 flow [2025-03-08 17:35:46,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 366 transitions, 5947 flow, removed 11 selfloop flow, removed 2 redundant places. [2025-03-08 17:35:46,438 INFO L231 Difference]: Finished difference. Result has 121 places, 260 transitions, 4864 flow [2025-03-08 17:35:46,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4864, PETRI_PLACES=121, PETRI_TRANSITIONS=260} [2025-03-08 17:35:46,439 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2025-03-08 17:35:46,439 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 260 transitions, 4864 flow [2025-03-08 17:35:46,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:46,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 17:35:46,440 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 17:35:46,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-03-08 17:35:46,440 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2025-03-08 17:35:46,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 17:35:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1415410188, now seen corresponding path program 8 times [2025-03-08 17:35:46,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 17:35:46,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769802068] [2025-03-08 17:35:46,440 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-08 17:35:46,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 17:35:46,446 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-08 17:35:46,453 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 35 of 36 statements. [2025-03-08 17:35:46,453 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-08 17:35:46,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 17:35:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-08 17:35:46,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 17:35:46,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769802068] [2025-03-08 17:35:46,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769802068] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 17:35:46,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 17:35:46,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-08 17:35:46,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836817675] [2025-03-08 17:35:46,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 17:35:46,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-08 17:35:46,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 17:35:46,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-08 17:35:46,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-08 17:35:46,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-03-08 17:35:46,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 260 transitions, 4864 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 17:35:46,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 17:35:46,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-03-08 17:35:46,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 17:35:53,728 INFO L124 PetriNetUnfolderBase]: 45332/69142 cut-off events. [2025-03-08 17:35:53,728 INFO L125 PetriNetUnfolderBase]: For 308450/308943 co-relation queries the response was YES. [2025-03-08 17:35:54,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279859 conditions, 69142 events. 45332/69142 cut-off events. For 308450/308943 co-relation queries the response was YES. Maximal size of possible extension queue 3217. Compared 561354 event pairs, 14381 based on Foata normal form. 878/69440 useless extension candidates. Maximal degree in co-relation 221924. Up to 44942 conditions per place. [2025-03-08 17:35:54,325 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 159 selfloop transitions, 184 changer transitions 15/369 dead transitions. [2025-03-08 17:35:54,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 369 transitions, 6427 flow [2025-03-08 17:35:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-08 17:35:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-08 17:35:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2025-03-08 17:35:54,326 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5807291666666666 [2025-03-08 17:35:54,326 INFO L175 Difference]: Start difference. First operand has 121 places, 260 transitions, 4864 flow. Second operand 8 states and 223 transitions. [2025-03-08 17:35:54,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 369 transitions, 6427 flow