./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:17:34,622 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:17:34,667 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:17:34,671 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:17:34,671 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:17:34,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:17:34,696 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:17:34,697 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:17:34,697 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:17:34,697 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:17:34,698 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:17:34,698 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:17:34,698 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:17:34,698 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:17:34,699 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:17:34,699 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:17:34,699 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:17:34,700 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:17:34,700 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:17:34,700 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:17:34,700 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:17:34,701 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:17:34,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:17:34,701 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:17:34,702 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:17:34,702 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:17:34,702 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:17:34,702 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:17:34,703 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:17:34,703 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:17:34,703 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:17:34,703 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:17:34,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:17:34,704 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:17:34,704 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:17:34,704 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:17:34,705 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:17:34,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:17:34,705 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:17:34,705 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:17:34,705 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:17:34,706 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:17:34,706 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2024-10-14 14:17:34,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:17:34,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:17:34,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:17:34,942 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:17:34,942 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:17:34,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i [2024-10-14 14:17:36,176 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:17:36,424 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:17:36,425 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack_longest-2.i [2024-10-14 14:17:36,442 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f82a60c90/90e42a6f2ac44d7db86759c8df4f6947/FLAG29a2e5520 [2024-10-14 14:17:36,735 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f82a60c90/90e42a6f2ac44d7db86759c8df4f6947 [2024-10-14 14:17:36,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:17:36,738 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:17:36,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:17:36,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:17:36,743 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:17:36,744 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:17:36" (1/1) ... [2024-10-14 14:17:36,744 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20d79865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:36, skipping insertion in model container [2024-10-14 14:17:36,744 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:17:36" (1/1) ... [2024-10-14 14:17:36,777 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:17:37,076 WARN L248 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/stack_longest-2.i[41530,41543] [2024-10-14 14:17:37,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:17:37,113 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:17:37,148 WARN L248 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/stack_longest-2.i[41530,41543] [2024-10-14 14:17:37,155 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:17:37,199 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:17:37,199 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37 WrapperNode [2024-10-14 14:17:37,200 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:17:37,200 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:17:37,200 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:17:37,201 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:17:37,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (1/1) ... [2024-10-14 14:17:37,218 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (1/1) ... [2024-10-14 14:17:37,237 INFO L138 Inliner]: procedures = 277, calls = 30, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 146 [2024-10-14 14:17:37,237 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:17:37,238 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:17:37,238 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:17:37,238 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:17:37,247 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (1/1) ... [2024-10-14 14:17:37,247 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (1/1) ... [2024-10-14 14:17:37,249 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (1/1) ... [2024-10-14 14:17:37,268 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 5, 3]. 50 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 5, 0]. The 2 writes are split as follows [0, 0, 2]. [2024-10-14 14:17:37,268 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (1/1) ... [2024-10-14 14:17:37,268 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (1/1) ... [2024-10-14 14:17:37,273 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (1/1) ... [2024-10-14 14:17:37,275 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (1/1) ... [2024-10-14 14:17:37,278 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (1/1) ... [2024-10-14 14:17:37,280 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (1/1) ... [2024-10-14 14:17:37,283 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:17:37,285 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:17:37,285 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:17:37,285 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:17:37,286 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (1/1) ... [2024-10-14 14:17:37,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:17:37,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:17:37,315 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) [2024-10-14 14:17:37,318 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 [2024-10-14 14:17:37,356 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-14 14:17:37,356 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-14 14:17:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-14 14:17:37,357 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-14 14:17:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-14 14:17:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:17:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:17:37,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 14:17:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:17:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:17:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 14:17:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-14 14:17:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:17:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:17:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:17:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 14:17:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:17:37,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:17:37,360 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:17:37,496 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:17:37,498 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:17:37,736 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:17:37,736 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:17:37,922 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:17:37,922 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 14:17:37,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:17:37 BoogieIcfgContainer [2024-10-14 14:17:37,923 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:17:37,944 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:17:37,945 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:17:37,948 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:17:37,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:17:36" (1/3) ... [2024-10-14 14:17:37,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acd0d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:17:37, skipping insertion in model container [2024-10-14 14:17:37,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:17:37" (2/3) ... [2024-10-14 14:17:37,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3acd0d2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:17:37, skipping insertion in model container [2024-10-14 14:17:37,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:17:37" (3/3) ... [2024-10-14 14:17:37,950 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2024-10-14 14:17:37,978 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:17:37,979 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-10-14 14:17:37,981 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:17:38,031 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:17:38,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2024-10-14 14:17:38,080 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-10-14 14:17:38,080 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:17:38,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 61 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 3 conditions per place. [2024-10-14 14:17:38,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2024-10-14 14:17:38,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 30 transitions, 69 flow [2024-10-14 14:17:38,094 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:17:38,100 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;@70d0983f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:17:38,100 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-14 14:17:38,111 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:17:38,111 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-10-14 14:17:38,111 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 14:17:38,112 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:17:38,112 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:17:38,112 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:17:38,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:17:38,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1882896509, now seen corresponding path program 1 times [2024-10-14 14:17:38,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:17:38,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624914816] [2024-10-14 14:17:38,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:38,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:17:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:38,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:17:38,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624914816] [2024-10-14 14:17:38,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624914816] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:17:38,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:17:38,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:17:38,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450149527] [2024-10-14 14:17:38,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:17:38,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:17:38,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:17:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:17:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:17:38,506 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-10-14 14:17:38,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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) [2024-10-14 14:17:38,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:17:38,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-10-14 14:17:38,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:17:38,702 INFO L124 PetriNetUnfolderBase]: 307/576 cut-off events. [2024-10-14 14:17:38,702 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-10-14 14:17:38,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1132 conditions, 576 events. 307/576 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2564 event pairs, 53 based on Foata normal form. 43/582 useless extension candidates. Maximal degree in co-relation 1055. Up to 358 conditions per place. [2024-10-14 14:17:38,711 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 2/52 dead transitions. [2024-10-14 14:17:38,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 52 transitions, 214 flow [2024-10-14 14:17:38,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:17:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:17:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-10-14 14:17:38,724 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2024-10-14 14:17:38,726 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 69 flow. Second operand 4 states and 83 transitions. [2024-10-14 14:17:38,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 52 transitions, 214 flow [2024-10-14 14:17:38,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 52 transitions, 205 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 14:17:38,733 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 82 flow [2024-10-14 14:17:38,739 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-10-14 14:17:38,742 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2024-10-14 14:17:38,742 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 82 flow [2024-10-14 14:17:38,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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) [2024-10-14 14:17:38,742 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:17:38,742 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:17:38,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:17:38,743 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:17:38,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:17:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1250718558, now seen corresponding path program 1 times [2024-10-14 14:17:38,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:17:38,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985806290] [2024-10-14 14:17:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:38,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:17:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:38,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:17:38,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985806290] [2024-10-14 14:17:38,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985806290] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:17:38,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126266015] [2024-10-14 14:17:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:38,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:17:38,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:17:38,988 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) [2024-10-14 14:17:38,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:17:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:39,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 14:17:39,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:17:39,138 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 8 treesize of output 1 [2024-10-14 14:17:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:39,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:17:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:39,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126266015] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:17:39,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:17:39,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-14 14:17:39,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201726086] [2024-10-14 14:17:39,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:17:39,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 14:17:39,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:17:39,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 14:17:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-10-14 14:17:39,296 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-14 14:17:39,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 82 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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) [2024-10-14 14:17:39,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:17:39,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-14 14:17:39,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:17:39,816 INFO L124 PetriNetUnfolderBase]: 1257/2340 cut-off events. [2024-10-14 14:17:39,816 INFO L125 PetriNetUnfolderBase]: For 301/303 co-relation queries the response was YES. [2024-10-14 14:17:39,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4928 conditions, 2340 events. 1257/2340 cut-off events. For 301/303 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 12471 event pairs, 153 based on Foata normal form. 49/2288 useless extension candidates. Maximal degree in co-relation 4364. Up to 365 conditions per place. [2024-10-14 14:17:39,829 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 163 selfloop transitions, 32 changer transitions 4/204 dead transitions. [2024-10-14 14:17:39,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 204 transitions, 900 flow [2024-10-14 14:17:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 14:17:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-14 14:17:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 313 transitions. [2024-10-14 14:17:39,832 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6137254901960785 [2024-10-14 14:17:39,832 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 82 flow. Second operand 15 states and 313 transitions. [2024-10-14 14:17:39,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 204 transitions, 900 flow [2024-10-14 14:17:39,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 204 transitions, 896 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:17:39,836 INFO L231 Difference]: Finished difference. Result has 54 places, 66 transitions, 329 flow [2024-10-14 14:17:39,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=329, PETRI_PLACES=54, PETRI_TRANSITIONS=66} [2024-10-14 14:17:39,837 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2024-10-14 14:17:39,837 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 66 transitions, 329 flow [2024-10-14 14:17:39,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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) [2024-10-14 14:17:39,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:17:39,838 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:17:39,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 14:17:40,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:17:40,039 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:17:40,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:17:40,039 INFO L85 PathProgramCache]: Analyzing trace with hash 137342735, now seen corresponding path program 1 times [2024-10-14 14:17:40,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:17:40,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511816976] [2024-10-14 14:17:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:40,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:17:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:40,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:17:40,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511816976] [2024-10-14 14:17:40,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511816976] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:17:40,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:17:40,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:17:40,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434230971] [2024-10-14 14:17:40,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:17:40,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:17:40,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:17:40,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:17:40,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:17:40,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-10-14 14:17:40,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 66 transitions, 329 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-10-14 14:17:40,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:17:40,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-10-14 14:17:40,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:17:40,271 INFO L124 PetriNetUnfolderBase]: 669/1355 cut-off events. [2024-10-14 14:17:40,271 INFO L125 PetriNetUnfolderBase]: For 603/603 co-relation queries the response was YES. [2024-10-14 14:17:40,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3066 conditions, 1355 events. 669/1355 cut-off events. For 603/603 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6877 event pairs, 231 based on Foata normal form. 66/1406 useless extension candidates. Maximal degree in co-relation 2918. Up to 634 conditions per place. [2024-10-14 14:17:40,279 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 43 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2024-10-14 14:17:40,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 339 flow [2024-10-14 14:17:40,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:17:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:17:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 58 transitions. [2024-10-14 14:17:40,280 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5686274509803921 [2024-10-14 14:17:40,280 INFO L175 Difference]: Start difference. First operand has 54 places, 66 transitions, 329 flow. Second operand 3 states and 58 transitions. [2024-10-14 14:17:40,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 339 flow [2024-10-14 14:17:40,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 307 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-10-14 14:17:40,290 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 198 flow [2024-10-14 14:17:40,291 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-10-14 14:17:40,292 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2024-10-14 14:17:40,292 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 198 flow [2024-10-14 14:17:40,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2024-10-14 14:17:40,293 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:17:40,293 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:17:40,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:17:40,293 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:17:40,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:17:40,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1757051872, now seen corresponding path program 1 times [2024-10-14 14:17:40,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:17:40,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786376738] [2024-10-14 14:17:40,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:40,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:17:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:40,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:17:40,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786376738] [2024-10-14 14:17:40,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786376738] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:17:40,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:17:40,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:17:40,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606587844] [2024-10-14 14:17:40,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:17:40,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:17:40,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:17:40,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:17:40,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:17:40,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-10-14 14:17:40,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2024-10-14 14:17:40,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:17:40,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-10-14 14:17:40,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:17:40,874 INFO L124 PetriNetUnfolderBase]: 833/1687 cut-off events. [2024-10-14 14:17:40,874 INFO L125 PetriNetUnfolderBase]: For 578/578 co-relation queries the response was YES. [2024-10-14 14:17:40,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3840 conditions, 1687 events. 833/1687 cut-off events. For 578/578 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8800 event pairs, 255 based on Foata normal form. 0/1668 useless extension candidates. Maximal degree in co-relation 3460. Up to 977 conditions per place. [2024-10-14 14:17:40,881 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 58 selfloop transitions, 7 changer transitions 5/82 dead transitions. [2024-10-14 14:17:40,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 438 flow [2024-10-14 14:17:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:17:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:17:40,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-10-14 14:17:40,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5647058823529412 [2024-10-14 14:17:40,883 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 198 flow. Second operand 5 states and 96 transitions. [2024-10-14 14:17:40,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 438 flow [2024-10-14 14:17:40,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 427 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:17:40,889 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 251 flow [2024-10-14 14:17:40,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2024-10-14 14:17:40,890 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2024-10-14 14:17:40,890 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 251 flow [2024-10-14 14:17:40,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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) [2024-10-14 14:17:40,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:17:40,891 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:17:40,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:17:40,891 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:17:40,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:17:40,892 INFO L85 PathProgramCache]: Analyzing trace with hash 867543009, now seen corresponding path program 1 times [2024-10-14 14:17:40,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:17:40,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505369596] [2024-10-14 14:17:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:40,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:17:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:41,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:17:41,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505369596] [2024-10-14 14:17:41,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505369596] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:17:41,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367512293] [2024-10-14 14:17:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:41,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:17:41,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:17:41,289 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) [2024-10-14 14:17:41,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:17:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:41,371 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 14:17:41,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:17:41,398 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 8 treesize of output 1 [2024-10-14 14:17:41,458 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 25 treesize of output 1 [2024-10-14 14:17:41,550 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 80 treesize of output 32 [2024-10-14 14:17:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:41,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:17:41,850 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 9 treesize of output 1 [2024-10-14 14:17:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:41,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367512293] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:17:41,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:17:41,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-10-14 14:17:41,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558275899] [2024-10-14 14:17:41,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:17:41,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:17:41,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:17:41,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:17:41,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:17:41,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-14 14:17:41,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 251 flow. Second operand has 15 states, 15 states have (on average 10.6) internal successors, (159), 15 states have internal predecessors, (159), 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) [2024-10-14 14:17:41,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:17:41,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-14 14:17:41,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:17:42,698 INFO L124 PetriNetUnfolderBase]: 1733/3424 cut-off events. [2024-10-14 14:17:42,698 INFO L125 PetriNetUnfolderBase]: For 1582/1582 co-relation queries the response was YES. [2024-10-14 14:17:42,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7766 conditions, 3424 events. 1733/3424 cut-off events. For 1582/1582 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 19465 event pairs, 231 based on Foata normal form. 0/3345 useless extension candidates. Maximal degree in co-relation 6680. Up to 551 conditions per place. [2024-10-14 14:17:42,714 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 184 selfloop transitions, 49 changer transitions 18/256 dead transitions. [2024-10-14 14:17:42,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 256 transitions, 1391 flow [2024-10-14 14:17:42,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 14:17:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-14 14:17:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 363 transitions. [2024-10-14 14:17:42,717 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5619195046439629 [2024-10-14 14:17:42,717 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 251 flow. Second operand 19 states and 363 transitions. [2024-10-14 14:17:42,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 256 transitions, 1391 flow [2024-10-14 14:17:42,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 256 transitions, 1383 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-14 14:17:42,726 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 513 flow [2024-10-14 14:17:42,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=513, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-10-14 14:17:42,728 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 42 predicate places. [2024-10-14 14:17:42,729 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 513 flow [2024-10-14 14:17:42,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 10.6) internal successors, (159), 15 states have internal predecessors, (159), 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) [2024-10-14 14:17:42,729 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:17:42,729 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:17:42,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 14:17:42,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:17:42,934 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:17:42,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:17:42,934 INFO L85 PathProgramCache]: Analyzing trace with hash 209231560, now seen corresponding path program 1 times [2024-10-14 14:17:42,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:17:42,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389714506] [2024-10-14 14:17:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:42,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:17:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:17:43,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:17:43,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389714506] [2024-10-14 14:17:43,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389714506] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:17:43,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868942229] [2024-10-14 14:17:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:43,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:17:43,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:17:43,126 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) [2024-10-14 14:17:43,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 14:17:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:43,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:17:43,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:17:43,242 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 8 treesize of output 1 [2024-10-14 14:17:43,291 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 8 treesize of output 1 [2024-10-14 14:17:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:43,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:17:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:17:43,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868942229] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:17:43,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:17:43,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 12 [2024-10-14 14:17:43,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233587907] [2024-10-14 14:17:43,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:17:43,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 14:17:43,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:17:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 14:17:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-14 14:17:43,494 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-14 14:17:43,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 513 flow. Second operand has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-10-14 14:17:43,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:17:43,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-14 14:17:43,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:17:44,416 INFO L124 PetriNetUnfolderBase]: 2836/5585 cut-off events. [2024-10-14 14:17:44,416 INFO L125 PetriNetUnfolderBase]: For 4329/4329 co-relation queries the response was YES. [2024-10-14 14:17:44,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13141 conditions, 5585 events. 2836/5585 cut-off events. For 4329/4329 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 33991 event pairs, 404 based on Foata normal form. 66/5593 useless extension candidates. Maximal degree in co-relation 12033. Up to 911 conditions per place. [2024-10-14 14:17:44,445 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 187 selfloop transitions, 90 changer transitions 8/290 dead transitions. [2024-10-14 14:17:44,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 290 transitions, 1810 flow [2024-10-14 14:17:44,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 14:17:44,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-14 14:17:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 352 transitions. [2024-10-14 14:17:44,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.544891640866873 [2024-10-14 14:17:44,447 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 513 flow. Second operand 19 states and 352 transitions. [2024-10-14 14:17:44,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 290 transitions, 1810 flow [2024-10-14 14:17:44,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 290 transitions, 1782 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-10-14 14:17:44,518 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1021 flow [2024-10-14 14:17:44,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1021, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-10-14 14:17:44,519 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 63 predicate places. [2024-10-14 14:17:44,519 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1021 flow [2024-10-14 14:17:44,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.416666666666666) internal successors, (149), 12 states have internal predecessors, (149), 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) [2024-10-14 14:17:44,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:17:44,520 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:17:44,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 14:17:44,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:17:44,720 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:17:44,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:17:44,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1165571844, now seen corresponding path program 1 times [2024-10-14 14:17:44,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:17:44,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513352689] [2024-10-14 14:17:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:44,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:17:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:45,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:17:45,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513352689] [2024-10-14 14:17:45,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513352689] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:17:45,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852490380] [2024-10-14 14:17:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:45,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:17:45,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:17:45,232 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) [2024-10-14 14:17:45,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 14:17:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:45,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 14:17:45,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:17:45,362 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 23 treesize of output 1 [2024-10-14 14:17:45,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 19 [2024-10-14 14:17:45,569 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 56 treesize of output 32 [2024-10-14 14:17:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:45,599 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:17:46,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:17:46,077 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 1 case distinctions, treesize of input 16 treesize of output 12 [2024-10-14 14:17:46,101 INFO L349 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2024-10-14 14:17:46,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 63 [2024-10-14 14:17:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:46,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852490380] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:17:46,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:17:46,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-14 14:17:46,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021515418] [2024-10-14 14:17:46,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:17:46,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 14:17:46,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:17:46,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 14:17:46,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-10-14 14:17:46,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-14 14:17:46,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1021 flow. Second operand has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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) [2024-10-14 14:17:46,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:17:46,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-14 14:17:46,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:17:47,553 INFO L124 PetriNetUnfolderBase]: 3678/7222 cut-off events. [2024-10-14 14:17:47,554 INFO L125 PetriNetUnfolderBase]: For 8724/8724 co-relation queries the response was YES. [2024-10-14 14:17:47,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18045 conditions, 7222 events. 3678/7222 cut-off events. For 8724/8724 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 45101 event pairs, 508 based on Foata normal form. 49/7199 useless extension candidates. Maximal degree in co-relation 16859. Up to 1190 conditions per place. [2024-10-14 14:17:47,586 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 222 selfloop transitions, 110 changer transitions 36/373 dead transitions. [2024-10-14 14:17:47,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 373 transitions, 2640 flow [2024-10-14 14:17:47,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-14 14:17:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-10-14 14:17:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 454 transitions. [2024-10-14 14:17:47,588 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5341176470588235 [2024-10-14 14:17:47,588 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1021 flow. Second operand 25 states and 454 transitions. [2024-10-14 14:17:47,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 373 transitions, 2640 flow [2024-10-14 14:17:47,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 373 transitions, 2578 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-10-14 14:17:47,621 INFO L231 Difference]: Finished difference. Result has 121 places, 158 transitions, 1499 flow [2024-10-14 14:17:47,621 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1499, PETRI_PLACES=121, PETRI_TRANSITIONS=158} [2024-10-14 14:17:47,621 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 89 predicate places. [2024-10-14 14:17:47,622 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 158 transitions, 1499 flow [2024-10-14 14:17:47,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.058823529411764) internal successors, (188), 17 states have internal predecessors, (188), 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) [2024-10-14 14:17:47,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:17:47,622 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2024-10-14 14:17:47,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 14:17:47,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:17:47,827 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:17:47,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:17:47,827 INFO L85 PathProgramCache]: Analyzing trace with hash 463820143, now seen corresponding path program 2 times [2024-10-14 14:17:47,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:17:47,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445115086] [2024-10-14 14:17:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:47,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:17:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:48,057 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:48,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:17:48,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445115086] [2024-10-14 14:17:48,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445115086] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:17:48,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681950241] [2024-10-14 14:17:48,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:17:48,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:17:48,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:17:48,059 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) [2024-10-14 14:17:48,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 14:17:48,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:17:48,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:17:48,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 14:17:48,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:17:48,184 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 8 treesize of output 1 [2024-10-14 14:17:48,207 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 8 treesize of output 1 [2024-10-14 14:17:48,231 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 8 treesize of output 1 [2024-10-14 14:17:48,260 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 8 treesize of output 1 [2024-10-14 14:17:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:48,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:17:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:48,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681950241] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:17:48,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:17:48,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-10-14 14:17:48,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019926285] [2024-10-14 14:17:48,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:17:48,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 14:17:48,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:17:48,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 14:17:48,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2024-10-14 14:17:48,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-14 14:17:48,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 158 transitions, 1499 flow. Second operand has 20 states, 20 states have (on average 10.6) internal successors, (212), 20 states have internal predecessors, (212), 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) [2024-10-14 14:17:48,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:17:48,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-14 14:17:48,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:17:51,496 INFO L124 PetriNetUnfolderBase]: 10584/20732 cut-off events. [2024-10-14 14:17:51,497 INFO L125 PetriNetUnfolderBase]: For 38799/38799 co-relation queries the response was YES. [2024-10-14 14:17:51,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55634 conditions, 20732 events. 10584/20732 cut-off events. For 38799/38799 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 152067 event pairs, 2276 based on Foata normal form. 335/20960 useless extension candidates. Maximal degree in co-relation 53660. Up to 3606 conditions per place. [2024-10-14 14:17:51,646 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 469 selfloop transitions, 366 changer transitions 0/840 dead transitions. [2024-10-14 14:17:51,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 840 transitions, 7338 flow [2024-10-14 14:17:51,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-14 14:17:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2024-10-14 14:17:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 804 transitions. [2024-10-14 14:17:51,648 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5499316005471956 [2024-10-14 14:17:51,648 INFO L175 Difference]: Start difference. First operand has 121 places, 158 transitions, 1499 flow. Second operand 43 states and 804 transitions. [2024-10-14 14:17:51,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 840 transitions, 7338 flow [2024-10-14 14:17:51,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 840 transitions, 7036 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-10-14 14:17:51,983 INFO L231 Difference]: Finished difference. Result has 174 places, 437 transitions, 4946 flow [2024-10-14 14:17:51,985 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=4946, PETRI_PLACES=174, PETRI_TRANSITIONS=437} [2024-10-14 14:17:51,986 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 142 predicate places. [2024-10-14 14:17:51,987 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 437 transitions, 4946 flow [2024-10-14 14:17:51,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.6) internal successors, (212), 20 states have internal predecessors, (212), 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) [2024-10-14 14:17:51,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:17:51,987 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:17:52,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 14:17:52,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:17:52,188 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:17:52,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:17:52,189 INFO L85 PathProgramCache]: Analyzing trace with hash 96723254, now seen corresponding path program 2 times [2024-10-14 14:17:52,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:17:52,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603274174] [2024-10-14 14:17:52,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:17:52,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:17:52,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:17:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:53,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:17:53,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603274174] [2024-10-14 14:17:53,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603274174] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:17:53,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488087734] [2024-10-14 14:17:53,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:17:53,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:17:53,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:17:53,123 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) [2024-10-14 14:17:53,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 14:17:53,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:17:53,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:17:53,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-14 14:17:53,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:17:53,301 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 15 treesize of output 1 [2024-10-14 14:17:53,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 14 [2024-10-14 14:17:53,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 14 [2024-10-14 14:17:53,698 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 56 treesize of output 32 [2024-10-14 14:17:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:53,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:17:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:17:54,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488087734] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:17:54,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:17:54,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 24 [2024-10-14 14:17:54,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517950880] [2024-10-14 14:17:54,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:17:54,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 14:17:54,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:17:54,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 14:17:54,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2024-10-14 14:17:54,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-14 14:17:54,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 437 transitions, 4946 flow. Second operand has 24 states, 24 states have (on average 10.833333333333334) internal successors, (260), 24 states have internal predecessors, (260), 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) [2024-10-14 14:17:54,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:17:54,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-14 14:17:54,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:18:00,302 INFO L124 PetriNetUnfolderBase]: 16613/32486 cut-off events. [2024-10-14 14:18:00,303 INFO L125 PetriNetUnfolderBase]: For 106698/106698 co-relation queries the response was YES. [2024-10-14 14:18:00,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94119 conditions, 32486 events. 16613/32486 cut-off events. For 106698/106698 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 248782 event pairs, 3330 based on Foata normal form. 357/32561 useless extension candidates. Maximal degree in co-relation 91944. Up to 5457 conditions per place. [2024-10-14 14:18:00,622 INFO L140 encePairwiseOnDemand]: 26/34 looper letters, 396 selfloop transitions, 563 changer transitions 28/992 dead transitions. [2024-10-14 14:18:00,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 992 transitions, 11243 flow [2024-10-14 14:18:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-14 14:18:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-10-14 14:18:00,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 599 transitions. [2024-10-14 14:18:00,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5033613445378151 [2024-10-14 14:18:00,625 INFO L175 Difference]: Start difference. First operand has 174 places, 437 transitions, 4946 flow. Second operand 35 states and 599 transitions. [2024-10-14 14:18:00,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 992 transitions, 11243 flow [2024-10-14 14:18:01,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 992 transitions, 10603 flow, removed 299 selfloop flow, removed 1 redundant places. [2024-10-14 14:18:01,624 INFO L231 Difference]: Finished difference. Result has 226 places, 690 transitions, 9041 flow [2024-10-14 14:18:01,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9041, PETRI_PLACES=226, PETRI_TRANSITIONS=690} [2024-10-14 14:18:01,625 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 194 predicate places. [2024-10-14 14:18:01,625 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 690 transitions, 9041 flow [2024-10-14 14:18:01,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.833333333333334) internal successors, (260), 24 states have internal predecessors, (260), 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) [2024-10-14 14:18:01,626 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:18:01,626 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:18:01,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 14:18:01,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:18:01,827 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:18:01,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:18:01,827 INFO L85 PathProgramCache]: Analyzing trace with hash 962453330, now seen corresponding path program 1 times [2024-10-14 14:18:01,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:18:01,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419006233] [2024-10-14 14:18:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:18:01,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:18:01,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:18:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:18:02,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:18:02,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419006233] [2024-10-14 14:18:02,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419006233] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:18:02,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965354210] [2024-10-14 14:18:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:18:02,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:18:02,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:18:02,186 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) [2024-10-14 14:18:02,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 14:18:02,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:18:02,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 14:18:02,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:18:02,340 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 8 treesize of output 1 [2024-10-14 14:18:02,379 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 8 treesize of output 1 [2024-10-14 14:18:02,421 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 8 treesize of output 1 [2024-10-14 14:18:02,455 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 8 treesize of output 1 [2024-10-14 14:18:02,494 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 8 treesize of output 1 [2024-10-14 14:18:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:18:02,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:18:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 45 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-10-14 14:18:02,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965354210] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:18:02,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:18:02,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 20 [2024-10-14 14:18:02,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815460093] [2024-10-14 14:18:02,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:18:02,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 14:18:02,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:18:02,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 14:18:02,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2024-10-14 14:18:02,780 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-14 14:18:02,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 690 transitions, 9041 flow. Second operand has 20 states, 20 states have (on average 12.75) internal successors, (255), 20 states have internal predecessors, (255), 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) [2024-10-14 14:18:02,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:18:02,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-14 14:18:02,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:18:19,479 INFO L124 PetriNetUnfolderBase]: 38535/75155 cut-off events. [2024-10-14 14:18:19,480 INFO L125 PetriNetUnfolderBase]: For 489896/489896 co-relation queries the response was YES. [2024-10-14 14:18:20,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235662 conditions, 75155 events. 38535/75155 cut-off events. For 489896/489896 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 625995 event pairs, 4794 based on Foata normal form. 747/75879 useless extension candidates. Maximal degree in co-relation 233519. Up to 12570 conditions per place. [2024-10-14 14:18:20,659 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 664 selfloop transitions, 1546 changer transitions 30/2245 dead transitions. [2024-10-14 14:18:20,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 2245 transitions, 28138 flow [2024-10-14 14:18:20,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-10-14 14:18:20,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2024-10-14 14:18:20,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 1142 transitions. [2024-10-14 14:18:20,661 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5167420814479639 [2024-10-14 14:18:20,661 INFO L175 Difference]: Start difference. First operand has 226 places, 690 transitions, 9041 flow. Second operand 65 states and 1142 transitions. [2024-10-14 14:18:20,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 2245 transitions, 28138 flow [2024-10-14 14:18:28,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 2245 transitions, 26458 flow, removed 840 selfloop flow, removed 0 redundant places. [2024-10-14 14:18:28,181 INFO L231 Difference]: Finished difference. Result has 305 places, 1671 transitions, 23783 flow [2024-10-14 14:18:28,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=8549, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=23783, PETRI_PLACES=305, PETRI_TRANSITIONS=1671} [2024-10-14 14:18:28,182 INFO L277 CegarLoopForPetriNet]: 32 programPoint places, 273 predicate places. [2024-10-14 14:18:28,182 INFO L471 AbstractCegarLoop]: Abstraction has has 305 places, 1671 transitions, 23783 flow [2024-10-14 14:18:28,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.75) internal successors, (255), 20 states have internal predecessors, (255), 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) [2024-10-14 14:18:28,182 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:18:28,183 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:18:28,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 14:18:28,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:18:28,383 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2024-10-14 14:18:28,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:18:28,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1624791934, now seen corresponding path program 3 times [2024-10-14 14:18:28,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:18:28,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91410975] [2024-10-14 14:18:28,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:18:28,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:18:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:18:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:18:29,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:18:29,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91410975] [2024-10-14 14:18:29,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91410975] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:18:29,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655698149] [2024-10-14 14:18:29,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:18:29,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:18:29,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:18:29,254 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:18:29,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 14:18:29,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 14:18:29,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:18:29,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-14 14:18:29,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:18:29,485 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 23 treesize of output 1 [2024-10-14 14:18:29,554 INFO L349 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2024-10-14 14:18:29,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 19 [2024-10-14 14:18:29,628 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 48 treesize of output 19 [2024-10-14 14:18:29,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:18:29,744 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 74 treesize of output 37 [2024-10-14 14:18:30,260 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:18:30,260 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 74 treesize of output 38 [2024-10-14 14:18:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:18:30,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:18:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:18:30,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655698149] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:18:30,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:18:30,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2024-10-14 14:18:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027032185] [2024-10-14 14:18:30,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:18:30,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 14:18:30,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:18:30,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 14:18:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2024-10-14 14:18:30,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-10-14 14:18:30,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 1671 transitions, 23783 flow. Second operand has 30 states, 30 states have (on average 11.3) internal successors, (339), 30 states have internal predecessors, (339), 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) [2024-10-14 14:18:30,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:18:30,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-10-14 14:18:30,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand