./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/queue_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/queue_longer.i -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 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 06:18:10,303 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 06:18:10,354 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-17 06:18:10,359 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 06:18:10,359 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 06:18:10,381 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 06:18:10,381 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 06:18:10,381 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 06:18:10,382 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 06:18:10,382 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 06:18:10,382 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 06:18:10,382 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 06:18:10,382 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 06:18:10,382 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 06:18:10,382 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 06:18:10,383 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 06:18:10,383 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 06:18:10,383 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 06:18:10,383 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 06:18:10,383 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 06:18:10,383 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 06:18:10,383 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 06:18:10,383 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 06:18:10,383 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 06:18:10,383 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 06:18:10,384 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 06:18:10,384 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 06:18:10,384 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 06:18:10,384 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 06:18:10,384 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 06:18:10,384 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 06:18:10,384 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 06:18:10,384 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:18:10,384 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 06:18:10,385 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 06:18:10,385 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 06:18:10,385 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 06:18:10,385 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 06:18:10,385 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 06:18:10,385 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 06:18:10,385 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 06:18:10,385 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 06:18:10,385 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 06:18:10,385 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 -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 [2025-03-17 06:18:10,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 06:18:10,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 06:18:10,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 06:18:10,679 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 06:18:10,679 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 06:18:10,681 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/queue_longer.i [2025-03-17 06:18:11,888 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d180224/fa7cda5b993345f3829fdef5d12f74bb/FLAGf194c79ea [2025-03-17 06:18:12,174 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 06:18:12,176 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_longer.i [2025-03-17 06:18:12,193 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d180224/fa7cda5b993345f3829fdef5d12f74bb/FLAGf194c79ea [2025-03-17 06:18:12,209 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f4d180224/fa7cda5b993345f3829fdef5d12f74bb [2025-03-17 06:18:12,211 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 06:18:12,213 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 06:18:12,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 06:18:12,215 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 06:18:12,218 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 06:18:12,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,219 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50c26867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12, skipping insertion in model container [2025-03-17 06:18:12,222 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,251 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 06:18:12,489 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/pthread/queue_longer.i[43296,43309] [2025-03-17 06:18:12,495 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/pthread/queue_longer.i[43503,43516] [2025-03-17 06:18:12,498 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/pthread/queue_longer.i[43783,43796] [2025-03-17 06:18:12,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:18:12,543 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 06:18:12,580 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/pthread/queue_longer.i[43296,43309] [2025-03-17 06:18:12,582 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/pthread/queue_longer.i[43503,43516] [2025-03-17 06:18:12,583 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/pthread/queue_longer.i[43783,43796] [2025-03-17 06:18:12,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 06:18:12,664 INFO L204 MainTranslator]: Completed translation [2025-03-17 06:18:12,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12 WrapperNode [2025-03-17 06:18:12,665 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 06:18:12,667 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 06:18:12,667 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 06:18:12,667 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 06:18:12,671 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,700 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,755 INFO L138 Inliner]: procedures = 274, calls = 856, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 1034 [2025-03-17 06:18:12,756 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 06:18:12,756 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 06:18:12,756 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 06:18:12,756 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 06:18:12,763 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,771 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,802 INFO L175 MemorySlicer]: Split 844 memory accesses to 4 slices as follows [2, 5, 403, 434]. 51 percent of accesses are in the largest equivalence class. The 810 initializations are split as follows [2, 5, 400, 403]. The 16 writes are split as follows [0, 0, 2, 14]. [2025-03-17 06:18:12,802 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,802 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,835 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,839 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,844 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,847 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,856 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 06:18:12,857 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 06:18:12,857 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 06:18:12,857 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 06:18:12,858 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (1/1) ... [2025-03-17 06:18:12,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 06:18:12,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:18:12,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 06:18:12,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 06:18:12,900 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-03-17 06:18:12,900 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-03-17 06:18:12,901 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-03-17 06:18:12,901 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-03-17 06:18:12,901 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-17 06:18:12,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 06:18:12,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 06:18:12,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-17 06:18:12,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-17 06:18:12,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 06:18:12,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 06:18:12,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-17 06:18:12,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-17 06:18:12,902 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-17 06:18:12,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 06:18:12,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 06:18:12,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 06:18:12,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-17 06:18:12,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-17 06:18:12,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 06:18:12,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 06:18:12,904 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 06:18:13,028 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 06:18:13,030 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 06:18:14,066 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 06:18:14,066 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 06:18:19,263 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 06:18:19,263 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 06:18:19,264 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:18:19 BoogieIcfgContainer [2025-03-17 06:18:19,264 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 06:18:19,266 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 06:18:19,266 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 06:18:19,269 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 06:18:19,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:18:12" (1/3) ... [2025-03-17 06:18:19,270 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2c0efe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:18:19, skipping insertion in model container [2025-03-17 06:18:19,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:18:12" (2/3) ... [2025-03-17 06:18:19,270 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a2c0efe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:18:19, skipping insertion in model container [2025-03-17 06:18:19,270 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 06:18:19" (3/3) ... [2025-03-17 06:18:19,271 INFO L128 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2025-03-17 06:18:19,283 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 06:18:19,285 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG queue_longer.i that has 3 procedures, 41 locations, 1 initial locations, 2 loop locations, and 3 error locations. [2025-03-17 06:18:19,285 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 06:18:19,340 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-17 06:18:19,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 47 transitions, 108 flow [2025-03-17 06:18:19,410 INFO L124 PetriNetUnfolderBase]: 7/45 cut-off events. [2025-03-17 06:18:19,414 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-17 06:18:19,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 45 events. 7/45 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2025-03-17 06:18:19,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 47 transitions, 108 flow [2025-03-17 06:18:19,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 43 transitions, 95 flow [2025-03-17 06:18:19,427 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 06:18:19,437 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;@6818ea59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 06:18:19,438 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2025-03-17 06:18:19,458 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 06:18:19,458 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 06:18:19,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 06:18:19,458 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:19,459 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 06:18:19,459 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 4 more)] === [2025-03-17 06:18:19,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:19,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2148286, now seen corresponding path program 1 times [2025-03-17 06:18:19,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:19,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802358941] [2025-03-17 06:18:19,469 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:18:19,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:19,551 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 06:18:19,661 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 06:18:19,661 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:18:19,661 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:19,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:19,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802358941] [2025-03-17 06:18:19,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802358941] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:18:19,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:18:19,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:18:19,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459000079] [2025-03-17 06:18:19,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:18:19,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-17 06:18:19,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:18:19,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-17 06:18:19,852 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-17 06:18:19,854 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2025-03-17 06:18:19,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 95 flow. Second operand has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:19,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:18:19,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2025-03-17 06:18:19,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:18:20,081 INFO L124 PetriNetUnfolderBase]: 425/775 cut-off events. [2025-03-17 06:18:20,082 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2025-03-17 06:18:20,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 775 events. 425/775 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3504 event pairs, 331 based on Foata normal form. 47/740 useless extension candidates. Maximal degree in co-relation 1446. Up to 692 conditions per place. [2025-03-17 06:18:20,091 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 31 selfloop transitions, 0 changer transitions 0/38 dead transitions. [2025-03-17 06:18:20,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 147 flow [2025-03-17 06:18:20,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-17 06:18:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-17 06:18:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 54 transitions. [2025-03-17 06:18:20,100 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2025-03-17 06:18:20,102 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 95 flow. Second operand 2 states and 54 transitions. [2025-03-17 06:18:20,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 147 flow [2025-03-17 06:18:20,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 142 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 06:18:20,108 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 80 flow [2025-03-17 06:18:20,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2025-03-17 06:18:20,113 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2025-03-17 06:18:20,113 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 80 flow [2025-03-17 06:18:20,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.0) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:20,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:20,114 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:18:20,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 06:18:20,114 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:18:20,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:20,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1291155109, now seen corresponding path program 1 times [2025-03-17 06:18:20,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:20,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135616040] [2025-03-17 06:18:20,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:18:20,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:20,148 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 06:18:20,189 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 06:18:20,190 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:18:20,190 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:20,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:20,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135616040] [2025-03-17 06:18:20,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135616040] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:18:20,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:18:20,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:18:20,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139806887] [2025-03-17 06:18:20,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:18:20,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:18:20,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:18:20,518 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:18:20,518 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:18:20,518 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2025-03-17 06:18:20,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:20,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:18:20,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2025-03-17 06:18:20,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:18:20,727 INFO L124 PetriNetUnfolderBase]: 405/753 cut-off events. [2025-03-17 06:18:20,727 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-03-17 06:18:20,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1454 conditions, 753 events. 405/753 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3504 event pairs, 304 based on Foata normal form. 0/699 useless extension candidates. Maximal degree in co-relation 1451. Up to 623 conditions per place. [2025-03-17 06:18:20,733 INFO L140 encePairwiseOnDemand]: 44/47 looper letters, 40 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2025-03-17 06:18:20,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 188 flow [2025-03-17 06:18:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:18:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:18:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2025-03-17 06:18:20,734 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2025-03-17 06:18:20,734 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 80 flow. Second operand 3 states and 73 transitions. [2025-03-17 06:18:20,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 188 flow [2025-03-17 06:18:20,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-17 06:18:20,736 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 82 flow [2025-03-17 06:18:20,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2025-03-17 06:18:20,737 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2025-03-17 06:18:20,737 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 82 flow [2025-03-17 06:18:20,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:20,737 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:20,737 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:18:20,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 06:18:20,737 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:18:20,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:20,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1371099533, now seen corresponding path program 1 times [2025-03-17 06:18:20,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:20,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329906327] [2025-03-17 06:18:20,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:18:20,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:20,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-17 06:18:20,801 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 06:18:20,801 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:18:20,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:21,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:21,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329906327] [2025-03-17 06:18:21,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329906327] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:18:21,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:18:21,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 06:18:21,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173853955] [2025-03-17 06:18:21,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:18:21,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 06:18:21,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:18:21,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 06:18:21,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 06:18:21,678 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2025-03-17 06:18:21,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 82 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:21,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:18:21,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2025-03-17 06:18:21,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:18:22,030 INFO L124 PetriNetUnfolderBase]: 674/1248 cut-off events. [2025-03-17 06:18:22,030 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2025-03-17 06:18:22,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2434 conditions, 1248 events. 674/1248 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6201 event pairs, 74 based on Foata normal form. 0/1197 useless extension candidates. Maximal degree in co-relation 2430. Up to 658 conditions per place. [2025-03-17 06:18:22,037 INFO L140 encePairwiseOnDemand]: 40/47 looper letters, 71 selfloop transitions, 10 changer transitions 3/91 dead transitions. [2025-03-17 06:18:22,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 91 transitions, 371 flow [2025-03-17 06:18:22,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 06:18:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 06:18:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2025-03-17 06:18:22,039 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2025-03-17 06:18:22,040 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 82 flow. Second operand 6 states and 146 transitions. [2025-03-17 06:18:22,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 91 transitions, 371 flow [2025-03-17 06:18:22,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 91 transitions, 361 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 06:18:22,043 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 146 flow [2025-03-17 06:18:22,043 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2025-03-17 06:18:22,044 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2025-03-17 06:18:22,045 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 146 flow [2025-03-17 06:18:22,045 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:22,045 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:22,045 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:18:22,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 06:18:22,045 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:18:22,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:22,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1649932617, now seen corresponding path program 1 times [2025-03-17 06:18:22,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:22,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217095393] [2025-03-17 06:18:22,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:18:22,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:22,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-03-17 06:18:22,097 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-03-17 06:18:22,097 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:18:22,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:22,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217095393] [2025-03-17 06:18:22,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217095393] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:18:22,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:18:22,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 06:18:22,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309292064] [2025-03-17 06:18:22,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:18:22,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:18:22,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:18:22,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:18:22,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:18:22,385 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2025-03-17 06:18:22,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:22,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:18:22,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2025-03-17 06:18:22,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:18:22,586 INFO L124 PetriNetUnfolderBase]: 419/814 cut-off events. [2025-03-17 06:18:22,587 INFO L125 PetriNetUnfolderBase]: For 112/116 co-relation queries the response was YES. [2025-03-17 06:18:22,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1680 conditions, 814 events. 419/814 cut-off events. For 112/116 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3578 event pairs, 215 based on Foata normal form. 32/828 useless extension candidates. Maximal degree in co-relation 1673. Up to 417 conditions per place. [2025-03-17 06:18:22,591 INFO L140 encePairwiseOnDemand]: 43/47 looper letters, 37 selfloop transitions, 4 changer transitions 3/50 dead transitions. [2025-03-17 06:18:22,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 217 flow [2025-03-17 06:18:22,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:18:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:18:22,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2025-03-17 06:18:22,593 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2025-03-17 06:18:22,593 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 146 flow. Second operand 3 states and 74 transitions. [2025-03-17 06:18:22,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 217 flow [2025-03-17 06:18:22,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 211 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 06:18:22,597 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 108 flow [2025-03-17 06:18:22,597 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2025-03-17 06:18:22,598 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2025-03-17 06:18:22,598 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 108 flow [2025-03-17 06:18:22,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:22,599 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:22,599 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] [2025-03-17 06:18:22,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 06:18:22,599 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:18:22,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1451870178, now seen corresponding path program 1 times [2025-03-17 06:18:22,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:22,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216105019] [2025-03-17 06:18:22,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:18:22,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:22,637 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 06:18:22,656 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 06:18:22,656 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:18:22,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:22,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:22,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216105019] [2025-03-17 06:18:22,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216105019] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:18:22,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:18:22,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 06:18:22,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325651074] [2025-03-17 06:18:22,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:18:22,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 06:18:22,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:18:22,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 06:18:22,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 06:18:22,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2025-03-17 06:18:22,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:22,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:18:22,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2025-03-17 06:18:22,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:18:23,077 INFO L124 PetriNetUnfolderBase]: 249/547 cut-off events. [2025-03-17 06:18:23,078 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2025-03-17 06:18:23,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1134 conditions, 547 events. 249/547 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2153 event pairs, 85 based on Foata normal form. 32/572 useless extension candidates. Maximal degree in co-relation 1126. Up to 252 conditions per place. [2025-03-17 06:18:23,083 INFO L140 encePairwiseOnDemand]: 41/47 looper letters, 34 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2025-03-17 06:18:23,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 211 flow [2025-03-17 06:18:23,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 06:18:23,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 06:18:23,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2025-03-17 06:18:23,084 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5035460992907801 [2025-03-17 06:18:23,084 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 108 flow. Second operand 3 states and 71 transitions. [2025-03-17 06:18:23,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 211 flow [2025-03-17 06:18:23,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 201 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-03-17 06:18:23,087 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 110 flow [2025-03-17 06:18:23,088 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2025-03-17 06:18:23,088 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2025-03-17 06:18:23,088 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 110 flow [2025-03-17 06:18:23,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:23,089 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:23,089 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] [2025-03-17 06:18:23,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-17 06:18:23,089 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:18:23,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:23,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1675207278, now seen corresponding path program 1 times [2025-03-17 06:18:23,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:23,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898485159] [2025-03-17 06:18:23,090 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:18:23,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:23,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:18:23,398 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:18:23,399 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:18:23,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:26,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:26,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898485159] [2025-03-17 06:18:26,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898485159] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:18:26,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430135228] [2025-03-17 06:18:26,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:18:26,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:18:26,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:18:26,244 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:18:26,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 06:18:26,337 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 06:18:26,556 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:18:26,557 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:18:26,557 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:26,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-17 06:18:26,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:18:26,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2025-03-17 06:18:26,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:26,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 32 [2025-03-17 06:18:26,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 06:18:27,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 06:18:27,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2025-03-17 06:18:27,092 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:27,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 67 [2025-03-17 06:18:27,345 INFO L349 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2025-03-17 06:18:27,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 123 treesize of output 81 [2025-03-17 06:18:27,353 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:27,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 49 [2025-03-17 06:18:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:27,362 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:18:27,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430135228] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:18:27,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:18:27,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2025-03-17 06:18:27,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079937827] [2025-03-17 06:18:27,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:18:27,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:18:27,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:18:27,363 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:18:27,364 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:18:27,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2025-03-17 06:18:27,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 110 flow. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:27,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:18:27,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2025-03-17 06:18:27,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:18:27,821 INFO L124 PetriNetUnfolderBase]: 357/793 cut-off events. [2025-03-17 06:18:27,822 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2025-03-17 06:18:27,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1715 conditions, 793 events. 357/793 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3829 event pairs, 74 based on Foata normal form. 0/784 useless extension candidates. Maximal degree in co-relation 1708. Up to 264 conditions per place. [2025-03-17 06:18:27,825 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 65 selfloop transitions, 14 changer transitions 8/93 dead transitions. [2025-03-17 06:18:27,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 93 transitions, 455 flow [2025-03-17 06:18:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:18:27,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:18:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2025-03-17 06:18:27,826 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41843971631205673 [2025-03-17 06:18:27,826 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 110 flow. Second operand 9 states and 177 transitions. [2025-03-17 06:18:27,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 93 transitions, 455 flow [2025-03-17 06:18:27,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 93 transitions, 433 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 06:18:27,828 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 202 flow [2025-03-17 06:18:27,828 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=202, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2025-03-17 06:18:27,828 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2025-03-17 06:18:27,828 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 202 flow [2025-03-17 06:18:27,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:27,829 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:27,829 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] [2025-03-17 06:18:27,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 06:18:28,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-17 06:18:28,030 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:18:28,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:28,031 INFO L85 PathProgramCache]: Analyzing trace with hash -115920784, now seen corresponding path program 2 times [2025-03-17 06:18:28,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:28,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310346842] [2025-03-17 06:18:28,031 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:18:28,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:28,057 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:18:28,171 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:18:28,172 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:18:28,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:29,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:29,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310346842] [2025-03-17 06:18:29,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310346842] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:18:29,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:18:29,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 06:18:29,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641948527] [2025-03-17 06:18:29,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:18:29,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:18:29,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:18:29,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:18:29,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:18:29,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2025-03-17 06:18:29,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 202 flow. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:29,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:18:29,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2025-03-17 06:18:29,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:18:30,386 INFO L124 PetriNetUnfolderBase]: 505/1134 cut-off events. [2025-03-17 06:18:30,386 INFO L125 PetriNetUnfolderBase]: For 909/911 co-relation queries the response was YES. [2025-03-17 06:18:30,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2966 conditions, 1134 events. 505/1134 cut-off events. For 909/911 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6367 event pairs, 115 based on Foata normal form. 6/1120 useless extension candidates. Maximal degree in co-relation 2953. Up to 595 conditions per place. [2025-03-17 06:18:30,391 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 73 selfloop transitions, 20 changer transitions 2/101 dead transitions. [2025-03-17 06:18:30,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 101 transitions, 618 flow [2025-03-17 06:18:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:18:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:18:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2025-03-17 06:18:30,392 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.408983451536643 [2025-03-17 06:18:30,392 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 202 flow. Second operand 9 states and 173 transitions. [2025-03-17 06:18:30,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 101 transitions, 618 flow [2025-03-17 06:18:30,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 101 transitions, 598 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-17 06:18:30,396 INFO L231 Difference]: Finished difference. Result has 65 places, 64 transitions, 393 flow [2025-03-17 06:18:30,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=393, PETRI_PLACES=65, PETRI_TRANSITIONS=64} [2025-03-17 06:18:30,396 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2025-03-17 06:18:30,396 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 64 transitions, 393 flow [2025-03-17 06:18:30,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:30,396 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:30,396 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] [2025-03-17 06:18:30,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 06:18:30,396 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:18:30,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:30,397 INFO L85 PathProgramCache]: Analyzing trace with hash -467939670, now seen corresponding path program 3 times [2025-03-17 06:18:30,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:30,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101621013] [2025-03-17 06:18:30,397 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:18:30,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:30,417 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:18:30,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:18:30,538 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:18:30,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:32,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:32,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:32,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101621013] [2025-03-17 06:18:32,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101621013] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:18:32,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 06:18:32,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-03-17 06:18:32,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534512799] [2025-03-17 06:18:32,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:18:32,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:18:32,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:18:32,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:18:32,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2025-03-17 06:18:32,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2025-03-17 06:18:32,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 64 transitions, 393 flow. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:32,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:18:32,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2025-03-17 06:18:32,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:18:32,662 INFO L124 PetriNetUnfolderBase]: 580/1306 cut-off events. [2025-03-17 06:18:32,662 INFO L125 PetriNetUnfolderBase]: For 1841/1841 co-relation queries the response was YES. [2025-03-17 06:18:32,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3817 conditions, 1306 events. 580/1306 cut-off events. For 1841/1841 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7588 event pairs, 148 based on Foata normal form. 6/1299 useless extension candidates. Maximal degree in co-relation 3799. Up to 479 conditions per place. [2025-03-17 06:18:32,669 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 85 selfloop transitions, 22 changer transitions 6/119 dead transitions. [2025-03-17 06:18:32,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 119 transitions, 866 flow [2025-03-17 06:18:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 06:18:32,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 06:18:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2025-03-17 06:18:32,671 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4231678486997636 [2025-03-17 06:18:32,671 INFO L175 Difference]: Start difference. First operand has 65 places, 64 transitions, 393 flow. Second operand 9 states and 179 transitions. [2025-03-17 06:18:32,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 119 transitions, 866 flow [2025-03-17 06:18:32,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 119 transitions, 818 flow, removed 24 selfloop flow, removed 0 redundant places. [2025-03-17 06:18:32,680 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 548 flow [2025-03-17 06:18:32,680 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=548, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2025-03-17 06:18:32,681 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2025-03-17 06:18:32,681 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 548 flow [2025-03-17 06:18:32,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:32,681 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:32,681 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] [2025-03-17 06:18:32,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-17 06:18:32,681 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:18:32,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:32,681 INFO L85 PathProgramCache]: Analyzing trace with hash 886319356, now seen corresponding path program 4 times [2025-03-17 06:18:32,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:32,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409928427] [2025-03-17 06:18:32,681 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:18:32,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:32,704 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:18:32,789 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:18:32,789 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:18:32,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:34,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:34,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409928427] [2025-03-17 06:18:34,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409928427] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:18:34,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369859893] [2025-03-17 06:18:34,316 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:18:34,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:18:34,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:18:34,319 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:18:34,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 06:18:34,400 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:18:34,563 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:18:34,563 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:18:34,563 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:34,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-17 06:18:34,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:18:34,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2025-03-17 06:18:34,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:34,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2025-03-17 06:18:34,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 06:18:34,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 06:18:34,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2025-03-17 06:18:34,921 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:34,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 59 [2025-03-17 06:18:35,192 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:35,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 77 [2025-03-17 06:18:35,203 INFO L349 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2025-03-17 06:18:35,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 47 [2025-03-17 06:18:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:35,213 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:18:35,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369859893] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:18:35,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:18:35,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2025-03-17 06:18:35,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268380253] [2025-03-17 06:18:35,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:18:35,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:18:35,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:18:35,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:18:35,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:18:35,231 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2025-03-17 06:18:35,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 548 flow. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:35,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:18:35,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2025-03-17 06:18:35,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:18:35,736 INFO L124 PetriNetUnfolderBase]: 631/1408 cut-off events. [2025-03-17 06:18:35,736 INFO L125 PetriNetUnfolderBase]: For 2747/2747 co-relation queries the response was YES. [2025-03-17 06:18:35,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4402 conditions, 1408 events. 631/1408 cut-off events. For 2747/2747 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8466 event pairs, 142 based on Foata normal form. 0/1395 useless extension candidates. Maximal degree in co-relation 4377. Up to 497 conditions per place. [2025-03-17 06:18:35,743 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 86 selfloop transitions, 31 changer transitions 6/129 dead transitions. [2025-03-17 06:18:35,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 129 transitions, 1032 flow [2025-03-17 06:18:35,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 06:18:35,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 06:18:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2025-03-17 06:18:35,745 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40425531914893614 [2025-03-17 06:18:35,745 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 548 flow. Second operand 10 states and 190 transitions. [2025-03-17 06:18:35,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 129 transitions, 1032 flow [2025-03-17 06:18:35,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 129 transitions, 968 flow, removed 29 selfloop flow, removed 2 redundant places. [2025-03-17 06:18:35,755 INFO L231 Difference]: Finished difference. Result has 88 places, 82 transitions, 632 flow [2025-03-17 06:18:35,755 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=632, PETRI_PLACES=88, PETRI_TRANSITIONS=82} [2025-03-17 06:18:35,756 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2025-03-17 06:18:35,756 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 82 transitions, 632 flow [2025-03-17 06:18:35,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:35,756 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:35,757 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] [2025-03-17 06:18:35,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 06:18:35,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-03-17 06:18:35,957 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:18:35,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:35,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1236565850, now seen corresponding path program 5 times [2025-03-17 06:18:35,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:35,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658431425] [2025-03-17 06:18:35,958 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:18:35,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:35,978 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:18:36,058 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:18:36,058 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:18:36,058 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:37,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:37,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658431425] [2025-03-17 06:18:37,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658431425] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:18:37,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020917686] [2025-03-17 06:18:37,783 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 06:18:37,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:18:37,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:18:37,785 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:18:37,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 06:18:37,884 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 06:18:38,068 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 06:18:38,069 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:18:38,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:38,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 1827 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-17 06:18:38,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:18:38,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2025-03-17 06:18:38,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:38,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2025-03-17 06:18:38,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 06:18:38,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2025-03-17 06:18:38,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:38,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 55 [2025-03-17 06:18:38,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:38,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 64 [2025-03-17 06:18:39,010 INFO L349 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2025-03-17 06:18:39,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 44 [2025-03-17 06:18:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:39,020 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 06:18:39,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020917686] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 06:18:39,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 06:18:39,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2025-03-17 06:18:39,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896212687] [2025-03-17 06:18:39,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 06:18:39,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 06:18:39,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:18:39,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 06:18:39,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2025-03-17 06:18:39,072 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 47 [2025-03-17 06:18:39,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 632 flow. Second operand has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:39,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:18:39,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 47 [2025-03-17 06:18:39,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:18:39,716 INFO L124 PetriNetUnfolderBase]: 700/1541 cut-off events. [2025-03-17 06:18:39,716 INFO L125 PetriNetUnfolderBase]: For 3545/3545 co-relation queries the response was YES. [2025-03-17 06:18:39,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4988 conditions, 1541 events. 700/1541 cut-off events. For 3545/3545 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9031 event pairs, 92 based on Foata normal form. 22/1552 useless extension candidates. Maximal degree in co-relation 4961. Up to 359 conditions per place. [2025-03-17 06:18:39,730 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 94 selfloop transitions, 42 changer transitions 2/144 dead transitions. [2025-03-17 06:18:39,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 144 transitions, 1192 flow [2025-03-17 06:18:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 06:18:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 06:18:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2025-03-17 06:18:39,736 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41005802707930367 [2025-03-17 06:18:39,736 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 632 flow. Second operand 11 states and 212 transitions. [2025-03-17 06:18:39,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 144 transitions, 1192 flow [2025-03-17 06:18:39,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 144 transitions, 1098 flow, removed 22 selfloop flow, removed 5 redundant places. [2025-03-17 06:18:39,746 INFO L231 Difference]: Finished difference. Result has 98 places, 89 transitions, 767 flow [2025-03-17 06:18:39,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=767, PETRI_PLACES=98, PETRI_TRANSITIONS=89} [2025-03-17 06:18:39,747 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2025-03-17 06:18:39,747 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 89 transitions, 767 flow [2025-03-17 06:18:39,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.222222222222221) internal successors, (110), 9 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:39,747 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:39,748 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:18:39,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 06:18:39,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:18:39,949 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:18:39,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:39,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1126472574, now seen corresponding path program 1 times [2025-03-17 06:18:39,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:39,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625612071] [2025-03-17 06:18:39,950 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:18:39,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:39,977 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:18:40,252 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:18:40,252 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:18:40,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:42,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:42,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625612071] [2025-03-17 06:18:42,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625612071] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:18:42,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240587050] [2025-03-17 06:18:42,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 06:18:42,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:18:42,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:18:42,457 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:18:42,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 06:18:42,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 06:18:42,730 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:18:42,730 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 06:18:42,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:42,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 43 conjuncts are in the unsatisfiable core [2025-03-17 06:18:42,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:18:42,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2025-03-17 06:18:42,845 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:42,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2025-03-17 06:18:42,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 06:18:43,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2025-03-17 06:18:43,094 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:43,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2025-03-17 06:18:43,899 INFO L349 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2025-03-17 06:18:43,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 94 treesize of output 64 [2025-03-17 06:18:43,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:43,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 36 [2025-03-17 06:18:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:43,919 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:18:44,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:44,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2025-03-17 06:18:44,159 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-17 06:18:44,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2025-03-17 06:18:45,101 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-17 06:18:45,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2025-03-17 06:18:45,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:45,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2025-03-17 06:18:45,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-17 06:18:45,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 102 [2025-03-17 06:18:46,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-17 06:18:46,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2025-03-17 06:18:46,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-03-17 06:18:46,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2025-03-17 06:18:46,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-17 06:18:46,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 102 [2025-03-17 06:18:46,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2025-03-17 06:18:46,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 102 [2025-03-17 06:18:46,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2025-03-17 06:18:46,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2025-03-17 06:18:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:48,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240587050] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:18:48,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:18:48,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2025-03-17 06:18:48,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916520721] [2025-03-17 06:18:48,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:18:48,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-17 06:18:48,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:18:48,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-17 06:18:48,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2025-03-17 06:18:48,792 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2025-03-17 06:18:48,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 89 transitions, 767 flow. Second operand has 28 states, 28 states have (on average 11.535714285714286) internal successors, (323), 28 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:48,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:18:48,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2025-03-17 06:18:48,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:18:51,828 INFO L124 PetriNetUnfolderBase]: 941/1968 cut-off events. [2025-03-17 06:18:51,828 INFO L125 PetriNetUnfolderBase]: For 6485/6487 co-relation queries the response was YES. [2025-03-17 06:18:51,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6808 conditions, 1968 events. 941/1968 cut-off events. For 6485/6487 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11733 event pairs, 229 based on Foata normal form. 10/1968 useless extension candidates. Maximal degree in co-relation 6776. Up to 1230 conditions per place. [2025-03-17 06:18:51,843 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 140 selfloop transitions, 38 changer transitions 2/185 dead transitions. [2025-03-17 06:18:51,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 185 transitions, 1585 flow [2025-03-17 06:18:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 06:18:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 06:18:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 281 transitions. [2025-03-17 06:18:51,845 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37367021276595747 [2025-03-17 06:18:51,845 INFO L175 Difference]: Start difference. First operand has 98 places, 89 transitions, 767 flow. Second operand 16 states and 281 transitions. [2025-03-17 06:18:51,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 185 transitions, 1585 flow [2025-03-17 06:18:51,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 185 transitions, 1454 flow, removed 43 selfloop flow, removed 8 redundant places. [2025-03-17 06:18:51,859 INFO L231 Difference]: Finished difference. Result has 111 places, 117 transitions, 998 flow [2025-03-17 06:18:51,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=998, PETRI_PLACES=111, PETRI_TRANSITIONS=117} [2025-03-17 06:18:51,859 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2025-03-17 06:18:51,860 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 117 transitions, 998 flow [2025-03-17 06:18:51,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.535714285714286) internal successors, (323), 28 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:18:51,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:18:51,860 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:18:51,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 06:18:52,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:18:52,061 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:18:52,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:18:52,061 INFO L85 PathProgramCache]: Analyzing trace with hash 128709754, now seen corresponding path program 2 times [2025-03-17 06:18:52,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:18:52,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387318780] [2025-03-17 06:18:52,062 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:18:52,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:18:52,086 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-17 06:18:52,290 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:18:52,290 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:18:52,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:54,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:18:54,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387318780] [2025-03-17 06:18:54,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387318780] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:18:54,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422912844] [2025-03-17 06:18:54,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 06:18:54,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:18:54,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:18:54,736 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:18:54,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 06:18:54,829 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-03-17 06:18:55,721 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:18:55,721 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 06:18:55,721 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:18:55,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-03-17 06:18:55,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:18:55,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2025-03-17 06:18:55,819 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:55,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2025-03-17 06:18:55,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-17 06:18:56,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:56,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2025-03-17 06:18:56,163 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:56,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2025-03-17 06:18:56,914 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:56,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 70 [2025-03-17 06:18:56,926 INFO L349 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2025-03-17 06:18:56,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 50 [2025-03-17 06:18:56,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:18:56,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:18:57,221 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-17 06:18:57,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2025-03-17 06:18:57,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:57,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2025-03-17 06:18:58,113 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:18:58,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2025-03-17 06:18:58,124 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-17 06:18:58,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2025-03-17 06:19:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:00,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422912844] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:00,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:00,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2025-03-17 06:19:00,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255042460] [2025-03-17 06:19:00,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:00,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-17 06:19:00,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:00,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-17 06:19:00,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2025-03-17 06:19:01,289 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2025-03-17 06:19:01,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 117 transitions, 998 flow. Second operand has 28 states, 28 states have (on average 11.535714285714286) internal successors, (323), 28 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:01,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:01,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2025-03-17 06:19:01,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:05,288 INFO L124 PetriNetUnfolderBase]: 1305/2687 cut-off events. [2025-03-17 06:19:05,288 INFO L125 PetriNetUnfolderBase]: For 10945/10945 co-relation queries the response was YES. [2025-03-17 06:19:05,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10196 conditions, 2687 events. 1305/2687 cut-off events. For 10945/10945 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 16518 event pairs, 238 based on Foata normal form. 0/2673 useless extension candidates. Maximal degree in co-relation 10159. Up to 1149 conditions per place. [2025-03-17 06:19:05,305 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 175 selfloop transitions, 45 changer transitions 2/227 dead transitions. [2025-03-17 06:19:05,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 227 transitions, 2109 flow [2025-03-17 06:19:05,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 06:19:05,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 06:19:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 278 transitions. [2025-03-17 06:19:05,309 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3943262411347518 [2025-03-17 06:19:05,309 INFO L175 Difference]: Start difference. First operand has 111 places, 117 transitions, 998 flow. Second operand 15 states and 278 transitions. [2025-03-17 06:19:05,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 227 transitions, 2109 flow [2025-03-17 06:19:05,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 227 transitions, 2011 flow, removed 41 selfloop flow, removed 5 redundant places. [2025-03-17 06:19:05,333 INFO L231 Difference]: Finished difference. Result has 128 places, 139 transitions, 1284 flow [2025-03-17 06:19:05,333 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1284, PETRI_PLACES=128, PETRI_TRANSITIONS=139} [2025-03-17 06:19:05,336 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2025-03-17 06:19:05,336 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 139 transitions, 1284 flow [2025-03-17 06:19:05,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.535714285714286) internal successors, (323), 28 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:05,336 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:05,336 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:05,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 06:19:05,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-17 06:19:05,537 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:05,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:05,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1990532298, now seen corresponding path program 3 times [2025-03-17 06:19:05,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:05,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897237837] [2025-03-17 06:19:05,538 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:19:05,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:05,563 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 2 equivalence classes. [2025-03-17 06:19:05,704 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:19:05,704 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:19:05,704 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:08,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:08,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897237837] [2025-03-17 06:19:08,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897237837] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:08,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498603454] [2025-03-17 06:19:08,563 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 06:19:08,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:08,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:08,565 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:08,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 06:19:08,660 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 29 statements into 2 equivalence classes. [2025-03-17 06:19:09,342 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:19:09,342 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-17 06:19:09,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:09,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-17 06:19:09,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:09,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2025-03-17 06:19:09,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:19:09,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2025-03-17 06:19:09,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2025-03-17 06:19:09,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 51 [2025-03-17 06:19:09,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 06:19:09,774 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2025-03-17 06:19:09,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 40 [2025-03-17 06:19:10,625 INFO L349 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2025-03-17 06:19:10,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 128 treesize of output 86 [2025-03-17 06:19:10,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:19:10,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 68 [2025-03-17 06:19:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:10,685 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:10,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:19:10,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 68 [2025-03-17 06:19:11,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:19:11,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 68 [2025-03-17 06:19:13,115 INFO L349 Elim1Store]: treesize reduction 5, result has 92.5 percent of original size [2025-03-17 06:19:13,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 3144 treesize of output 1817 [2025-03-17 06:19:13,671 WARN L214 Elim1Store]: Array PQE input equivalent to true [2025-03-17 06:19:13,699 WARN L214 Elim1Store]: Array PQE input equivalent to true [2025-03-17 06:19:14,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:14,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498603454] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:14,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:14,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2025-03-17 06:19:14,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171703584] [2025-03-17 06:19:14,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:14,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-17 06:19:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:14,178 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-17 06:19:14,178 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2025-03-17 06:19:15,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2025-03-17 06:19:15,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 139 transitions, 1284 flow. Second operand has 28 states, 28 states have (on average 11.535714285714286) internal successors, (323), 28 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:15,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:15,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2025-03-17 06:19:15,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:20,892 INFO L124 PetriNetUnfolderBase]: 1723/3529 cut-off events. [2025-03-17 06:19:20,892 INFO L125 PetriNetUnfolderBase]: For 20621/20621 co-relation queries the response was YES. [2025-03-17 06:19:20,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14919 conditions, 3529 events. 1723/3529 cut-off events. For 20621/20621 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 23172 event pairs, 176 based on Foata normal form. 0/3508 useless extension candidates. Maximal degree in co-relation 14873. Up to 728 conditions per place. [2025-03-17 06:19:20,914 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 192 selfloop transitions, 102 changer transitions 5/304 dead transitions. [2025-03-17 06:19:20,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 304 transitions, 3062 flow [2025-03-17 06:19:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 06:19:20,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-03-17 06:19:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 383 transitions. [2025-03-17 06:19:20,917 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3880445795339412 [2025-03-17 06:19:20,917 INFO L175 Difference]: Start difference. First operand has 128 places, 139 transitions, 1284 flow. Second operand 21 states and 383 transitions. [2025-03-17 06:19:20,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 304 transitions, 3062 flow [2025-03-17 06:19:20,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 304 transitions, 2955 flow, removed 37 selfloop flow, removed 5 redundant places. [2025-03-17 06:19:20,953 INFO L231 Difference]: Finished difference. Result has 154 places, 176 transitions, 1992 flow [2025-03-17 06:19:20,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1992, PETRI_PLACES=154, PETRI_TRANSITIONS=176} [2025-03-17 06:19:20,954 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2025-03-17 06:19:20,954 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 176 transitions, 1992 flow [2025-03-17 06:19:20,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.535714285714286) internal successors, (323), 28 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:20,955 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:20,955 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:20,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 06:19:21,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:21,156 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2025-03-17 06:19:21,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 06:19:21,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1852888368, now seen corresponding path program 4 times [2025-03-17 06:19:21,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 06:19:21,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529152511] [2025-03-17 06:19:21,157 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:19:21,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 06:19:21,180 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-17 06:19:21,300 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:19:21,300 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:19:21,300 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:23,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 06:19:23,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529152511] [2025-03-17 06:19:23,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529152511] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 06:19:23,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672309062] [2025-03-17 06:19:23,187 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 06:19:23,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 06:19:23,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 06:19:23,189 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 06:19:23,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 06:19:23,317 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 29 statements into 2 equivalence classes. [2025-03-17 06:19:23,461 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 06:19:23,461 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 06:19:23,461 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 06:19:23,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-03-17 06:19:23,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 06:19:23,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2025-03-17 06:19:23,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:19:23,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2025-03-17 06:19:23,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-03-17 06:19:23,699 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:19:23,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2025-03-17 06:19:23,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2025-03-17 06:19:24,058 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:19:24,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2025-03-17 06:19:24,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:19:24,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 21 [2025-03-17 06:19:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:24,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 06:19:24,437 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-17 06:19:24,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2025-03-17 06:19:24,450 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:19:24,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2025-03-17 06:19:25,453 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2025-03-17 06:19:25,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2025-03-17 06:19:25,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-17 06:19:25,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 22 [2025-03-17 06:19:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 06:19:27,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672309062] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 06:19:27,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 06:19:27,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2025-03-17 06:19:27,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580070133] [2025-03-17 06:19:27,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 06:19:27,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-17 06:19:27,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 06:19:27,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-17 06:19:27,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2025-03-17 06:19:27,859 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 47 [2025-03-17 06:19:27,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 176 transitions, 1992 flow. Second operand has 28 states, 28 states have (on average 11.285714285714286) internal successors, (316), 28 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:27,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 06:19:27,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 47 [2025-03-17 06:19:27,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 06:19:30,923 INFO L124 PetriNetUnfolderBase]: 1631/3346 cut-off events. [2025-03-17 06:19:30,923 INFO L125 PetriNetUnfolderBase]: For 36389/36389 co-relation queries the response was YES. [2025-03-17 06:19:30,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16793 conditions, 3346 events. 1631/3346 cut-off events. For 36389/36389 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 21088 event pairs, 43 based on Foata normal form. 123/3455 useless extension candidates. Maximal degree in co-relation 16735. Up to 637 conditions per place. [2025-03-17 06:19:30,951 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 207 selfloop transitions, 155 changer transitions 6/373 dead transitions. [2025-03-17 06:19:30,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 373 transitions, 4591 flow [2025-03-17 06:19:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-17 06:19:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-03-17 06:19:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 495 transitions. [2025-03-17 06:19:30,954 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3761398176291793 [2025-03-17 06:19:30,954 INFO L175 Difference]: Start difference. First operand has 154 places, 176 transitions, 1992 flow. Second operand 28 states and 495 transitions. [2025-03-17 06:19:30,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 373 transitions, 4591 flow [2025-03-17 06:19:31,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 373 transitions, 4076 flow, removed 215 selfloop flow, removed 19 redundant places. [2025-03-17 06:19:31,021 INFO L231 Difference]: Finished difference. Result has 166 places, 223 transitions, 2991 flow [2025-03-17 06:19:31,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2991, PETRI_PLACES=166, PETRI_TRANSITIONS=223} [2025-03-17 06:19:31,021 INFO L279 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2025-03-17 06:19:31,021 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 223 transitions, 2991 flow [2025-03-17 06:19:31,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.285714285714286) internal successors, (316), 28 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 06:19:31,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 06:19:31,022 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 06:19:31,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0