./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 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/weaver/popl20-more-sum-array-hom.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:43:26,400 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:43:26,456 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:43:26,460 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:43:26,460 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:43:26,473 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:43:26,474 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:43:26,474 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:43:26,475 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:43:26,475 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:43:26,475 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:43:26,475 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:43:26,476 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:43:26,476 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:43:26,476 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:43:26,476 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:43:26,477 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:43:26,478 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:43:26,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:43:26,480 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:43:26,480 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:43:26,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:43:26,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:43:26,481 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:43:26,481 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:43:26,481 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:43:26,482 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:43:26,482 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:43:26,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:43:26,482 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:43:26,482 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:43:26,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:43:26,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:43:26,483 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:43:26,483 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:43:26,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:43:26,483 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:43:26,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:43:26,483 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:43:26,483 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:43:26,483 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:43:26,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:43:26,485 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2024-11-20 09:43:26,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:43:26,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:43:26,705 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:43:26,706 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:43:26,706 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:43:26,707 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-20 09:43:27,942 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:43:28,108 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:43:28,108 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-20 09:43:28,117 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4612e24ca/206d593c511b4d2abdef142fe54d469f/FLAGf3e7c9005 [2024-11-20 09:43:28,132 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4612e24ca/206d593c511b4d2abdef142fe54d469f [2024-11-20 09:43:28,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:43:28,135 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:43:28,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:43:28,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:43:28,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:43:28,142 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17efe636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28, skipping insertion in model container [2024-11-20 09:43:28,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,164 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:43:28,383 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2024-11-20 09:43:28,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:43:28,401 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:43:28,422 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2024-11-20 09:43:28,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:43:28,440 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:43:28,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28 WrapperNode [2024-11-20 09:43:28,441 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:43:28,442 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:43:28,442 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:43:28,442 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:43:28,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,458 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,478 INFO L138 Inliner]: procedures = 24, calls = 19, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 87 [2024-11-20 09:43:28,478 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:43:28,479 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:43:28,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:43:28,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:43:28,487 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,490 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,501 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-20 09:43:28,501 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,501 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,506 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,509 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,510 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,513 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:43:28,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:43:28,514 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:43:28,514 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:43:28,514 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (1/1) ... [2024-11-20 09:43:28,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:43:28,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:28,550 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) [2024-11-20 09:43:28,553 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 [2024-11-20 09:43:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:43:28,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:43:28,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:43:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:43:28,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:43:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 09:43:28,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 09:43:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:43:28,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 09:43:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 09:43:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 09:43:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 09:43:28,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:43:28,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:43:28,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 09:43:28,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 09:43:28,592 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:43:28,669 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:43:28,671 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:43:28,897 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:43:28,897 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:43:29,041 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:43:29,042 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 09:43:29,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:43:29 BoogieIcfgContainer [2024-11-20 09:43:29,043 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:43:29,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:43:29,046 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:43:29,049 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:43:29,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:43:28" (1/3) ... [2024-11-20 09:43:29,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2392406e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:43:29, skipping insertion in model container [2024-11-20 09:43:29,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:28" (2/3) ... [2024-11-20 09:43:29,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2392406e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:43:29, skipping insertion in model container [2024-11-20 09:43:29,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:43:29" (3/3) ... [2024-11-20 09:43:29,053 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2024-11-20 09:43:29,064 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:43:29,065 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:43:29,065 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:43:29,105 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 09:43:29,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 27 transitions, 75 flow [2024-11-20 09:43:29,150 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-20 09:43:29,150 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 09:43:29,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 24 events. 4/24 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-11-20 09:43:29,154 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 27 transitions, 75 flow [2024-11-20 09:43:29,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 23 transitions, 64 flow [2024-11-20 09:43:29,167 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:43:29,174 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;@6c1b5b96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:43:29,174 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-20 09:43:29,182 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:43:29,182 INFO L124 PetriNetUnfolderBase]: 4/22 cut-off events. [2024-11-20 09:43:29,182 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 09:43:29,182 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:29,183 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:29,184 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:29,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash 368648374, now seen corresponding path program 1 times [2024-11-20 09:43:29,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:29,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244372905] [2024-11-20 09:43:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:29,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:29,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:29,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:29,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244372905] [2024-11-20 09:43:29,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244372905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:29,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:29,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:43:29,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113262617] [2024-11-20 09:43:29,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:29,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:43:29,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:29,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:43:29,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:43:29,787 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:29,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-20 09:43:29,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:29,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:29,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:29,921 INFO L124 PetriNetUnfolderBase]: 387/567 cut-off events. [2024-11-20 09:43:29,921 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-20 09:43:29,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 567 events. 387/567 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1795 event pairs, 124 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2024-11-20 09:43:29,930 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 34 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2024-11-20 09:43:29,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 40 transitions, 191 flow [2024-11-20 09:43:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:43:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:43:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-11-20 09:43:29,939 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-11-20 09:43:29,940 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 64 flow. Second operand 3 states and 52 transitions. [2024-11-20 09:43:29,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 40 transitions, 191 flow [2024-11-20 09:43:29,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 40 transitions, 169 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 09:43:29,946 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 78 flow [2024-11-20 09:43:29,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2024-11-20 09:43:29,951 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2024-11-20 09:43:29,951 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 78 flow [2024-11-20 09:43:29,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-20 09:43:29,952 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:29,952 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:29,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:43:29,953 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:29,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:29,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1718815074, now seen corresponding path program 1 times [2024-11-20 09:43:29,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:29,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416963911] [2024-11-20 09:43:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:29,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:30,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:30,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416963911] [2024-11-20 09:43:30,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416963911] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:30,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:30,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:43:30,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943520982] [2024-11-20 09:43:30,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:30,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:43:30,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:30,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:43:30,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:43:30,058 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:30,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-20 09:43:30,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:30,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:30,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:30,249 INFO L124 PetriNetUnfolderBase]: 703/1050 cut-off events. [2024-11-20 09:43:30,249 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2024-11-20 09:43:30,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2519 conditions, 1050 events. 703/1050 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3873 event pairs, 401 based on Foata normal form. 46/1094 useless extension candidates. Maximal degree in co-relation 894. Up to 567 conditions per place. [2024-11-20 09:43:30,257 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 55 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-11-20 09:43:30,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 61 transitions, 298 flow [2024-11-20 09:43:30,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:43:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:43:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-11-20 09:43:30,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2024-11-20 09:43:30,259 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 78 flow. Second operand 5 states and 74 transitions. [2024-11-20 09:43:30,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 61 transitions, 298 flow [2024-11-20 09:43:30,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 61 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:43:30,263 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 112 flow [2024-11-20 09:43:30,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-11-20 09:43:30,263 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2024-11-20 09:43:30,264 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 112 flow [2024-11-20 09:43:30,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-20 09:43:30,264 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:30,265 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:30,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:43:30,265 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:30,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:30,265 INFO L85 PathProgramCache]: Analyzing trace with hash -546188461, now seen corresponding path program 1 times [2024-11-20 09:43:30,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:30,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608348616] [2024-11-20 09:43:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:30,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:30,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:30,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608348616] [2024-11-20 09:43:30,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608348616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:30,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:30,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:43:30,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115441000] [2024-11-20 09:43:30,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:30,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:43:30,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:30,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:43:30,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:43:30,375 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:30,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-20 09:43:30,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:30,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:30,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:30,532 INFO L124 PetriNetUnfolderBase]: 611/931 cut-off events. [2024-11-20 09:43:30,532 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2024-11-20 09:43:30,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 931 events. 611/931 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3434 event pairs, 372 based on Foata normal form. 41/971 useless extension candidates. Maximal degree in co-relation 1457. Up to 567 conditions per place. [2024-11-20 09:43:30,541 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 50 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-11-20 09:43:30,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 300 flow [2024-11-20 09:43:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:43:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:43:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-11-20 09:43:30,542 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5259259259259259 [2024-11-20 09:43:30,542 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 112 flow. Second operand 5 states and 71 transitions. [2024-11-20 09:43:30,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 300 flow [2024-11-20 09:43:30,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 56 transitions, 296 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 09:43:30,545 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 135 flow [2024-11-20 09:43:30,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-11-20 09:43:30,547 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2024-11-20 09:43:30,547 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 135 flow [2024-11-20 09:43:30,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-20 09:43:30,547 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:30,547 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:30,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:43:30,548 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:30,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:30,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1422309272, now seen corresponding path program 1 times [2024-11-20 09:43:30,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:30,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914564712] [2024-11-20 09:43:30,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:30,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:30,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:30,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914564712] [2024-11-20 09:43:30,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914564712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:30,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:30,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 09:43:30,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833148741] [2024-11-20 09:43:30,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:30,639 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:43:30,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:30,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:43:30,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:43:30,640 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:30,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-20 09:43:30,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:30,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:30,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:30,768 INFO L124 PetriNetUnfolderBase]: 511/784 cut-off events. [2024-11-20 09:43:30,769 INFO L125 PetriNetUnfolderBase]: For 801/801 co-relation queries the response was YES. [2024-11-20 09:43:30,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2292 conditions, 784 events. 511/784 cut-off events. For 801/801 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2728 event pairs, 333 based on Foata normal form. 22/805 useless extension candidates. Maximal degree in co-relation 1615. Up to 567 conditions per place. [2024-11-20 09:43:30,773 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 24 selfloop transitions, 2 changer transitions 23/50 dead transitions. [2024-11-20 09:43:30,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 293 flow [2024-11-20 09:43:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:43:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:43:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-11-20 09:43:30,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-11-20 09:43:30,776 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 135 flow. Second operand 5 states and 67 transitions. [2024-11-20 09:43:30,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 293 flow [2024-11-20 09:43:30,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 09:43:30,780 INFO L231 Difference]: Finished difference. Result has 41 places, 27 transitions, 108 flow [2024-11-20 09:43:30,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=41, PETRI_TRANSITIONS=27} [2024-11-20 09:43:30,781 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2024-11-20 09:43:30,781 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 27 transitions, 108 flow [2024-11-20 09:43:30,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-20 09:43:30,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:30,782 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:30,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:43:30,782 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:30,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:30,783 INFO L85 PathProgramCache]: Analyzing trace with hash -2051914133, now seen corresponding path program 1 times [2024-11-20 09:43:30,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:30,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094860558] [2024-11-20 09:43:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:30,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:30,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:30,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094860558] [2024-11-20 09:43:30,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094860558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:30,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442812818] [2024-11-20 09:43:30,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:30,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:30,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:30,878 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) [2024-11-20 09:43:30,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:43:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:30,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:43:30,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:31,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:31,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442812818] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:31,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:43:31,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2024-11-20 09:43:31,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424838452] [2024-11-20 09:43:31,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:31,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:43:31,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:43:31,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:43:31,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:31,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 27 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2024-11-20 09:43:31,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:31,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:31,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:31,257 INFO L124 PetriNetUnfolderBase]: 517/764 cut-off events. [2024-11-20 09:43:31,258 INFO L125 PetriNetUnfolderBase]: For 723/723 co-relation queries the response was YES. [2024-11-20 09:43:31,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 764 events. 517/764 cut-off events. For 723/723 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2657 event pairs, 150 based on Foata normal form. 14/777 useless extension candidates. Maximal degree in co-relation 2321. Up to 379 conditions per place. [2024-11-20 09:43:31,261 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 55 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-11-20 09:43:31,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 390 flow [2024-11-20 09:43:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:43:31,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:43:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-11-20 09:43:31,262 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-11-20 09:43:31,262 INFO L175 Difference]: Start difference. First operand has 41 places, 27 transitions, 108 flow. Second operand 7 states and 84 transitions. [2024-11-20 09:43:31,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 390 flow [2024-11-20 09:43:31,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 65 transitions, 322 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-11-20 09:43:31,269 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 139 flow [2024-11-20 09:43:31,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-11-20 09:43:31,270 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2024-11-20 09:43:31,270 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 139 flow [2024-11-20 09:43:31,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2024-11-20 09:43:31,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:31,270 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:31,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 09:43:31,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:31,471 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:31,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:31,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1252915929, now seen corresponding path program 2 times [2024-11-20 09:43:31,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:31,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751093496] [2024-11-20 09:43:31,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:31,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:31,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:31,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751093496] [2024-11-20 09:43:31,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751093496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:31,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815633874] [2024-11-20 09:43:31,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:43:31,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:31,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:31,559 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) [2024-11-20 09:43:31,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:43:31,616 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:43:31,616 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:31,617 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:43:31,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:31,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:31,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815633874] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:31,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:43:31,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-20 09:43:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605169456] [2024-11-20 09:43:31,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:31,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:43:31,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:31,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:43:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:43:31,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:31,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 139 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2024-11-20 09:43:31,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:31,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:31,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:31,909 INFO L124 PetriNetUnfolderBase]: 678/1005 cut-off events. [2024-11-20 09:43:31,909 INFO L125 PetriNetUnfolderBase]: For 950/950 co-relation queries the response was YES. [2024-11-20 09:43:31,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3045 conditions, 1005 events. 678/1005 cut-off events. For 950/950 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3648 event pairs, 240 based on Foata normal form. 12/1016 useless extension candidates. Maximal degree in co-relation 3023. Up to 593 conditions per place. [2024-11-20 09:43:31,914 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 57 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-11-20 09:43:31,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 435 flow [2024-11-20 09:43:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:43:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:43:31,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-11-20 09:43:31,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-11-20 09:43:31,916 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 139 flow. Second operand 7 states and 80 transitions. [2024-11-20 09:43:31,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 435 flow [2024-11-20 09:43:31,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 70 transitions, 400 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-11-20 09:43:31,919 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 196 flow [2024-11-20 09:43:31,920 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=196, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-20 09:43:31,920 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2024-11-20 09:43:31,921 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 196 flow [2024-11-20 09:43:31,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2024-11-20 09:43:31,921 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:31,921 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:31,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 09:43:32,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-20 09:43:32,123 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:32,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:32,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1113471579, now seen corresponding path program 3 times [2024-11-20 09:43:32,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:32,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720049306] [2024-11-20 09:43:32,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:32,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:32,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:32,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720049306] [2024-11-20 09:43:32,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720049306] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:32,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182027281] [2024-11-20 09:43:32,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:43:32,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:32,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:32,200 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) [2024-11-20 09:43:32,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:43:32,256 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:43:32,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:32,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:43:32,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:32,335 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:32,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:32,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182027281] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:32,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:43:32,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-11-20 09:43:32,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123062579] [2024-11-20 09:43:32,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:32,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:43:32,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:32,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:43:32,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:43:32,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:32,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2024-11-20 09:43:32,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:32,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:32,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:32,560 INFO L124 PetriNetUnfolderBase]: 784/1167 cut-off events. [2024-11-20 09:43:32,560 INFO L125 PetriNetUnfolderBase]: For 2006/2006 co-relation queries the response was YES. [2024-11-20 09:43:32,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4073 conditions, 1167 events. 784/1167 cut-off events. For 2006/2006 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4395 event pairs, 319 based on Foata normal form. 14/1180 useless extension candidates. Maximal degree in co-relation 4048. Up to 820 conditions per place. [2024-11-20 09:43:32,578 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 56 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-11-20 09:43:32,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 74 transitions, 519 flow [2024-11-20 09:43:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:43:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:43:32,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-11-20 09:43:32,579 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-11-20 09:43:32,579 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 196 flow. Second operand 7 states and 82 transitions. [2024-11-20 09:43:32,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 74 transitions, 519 flow [2024-11-20 09:43:32,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 74 transitions, 478 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-11-20 09:43:32,583 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 293 flow [2024-11-20 09:43:32,583 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=293, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-11-20 09:43:32,583 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2024-11-20 09:43:32,583 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 293 flow [2024-11-20 09:43:32,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2024-11-20 09:43:32,584 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:32,584 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:32,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 09:43:32,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:32,785 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:32,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:32,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1921426485, now seen corresponding path program 4 times [2024-11-20 09:43:32,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:32,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037310265] [2024-11-20 09:43:32,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:32,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:32,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:32,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037310265] [2024-11-20 09:43:32,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037310265] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:32,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311393425] [2024-11-20 09:43:32,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:43:32,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:32,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:32,902 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) [2024-11-20 09:43:32,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 09:43:32,958 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:43:32,958 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:32,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:43:32,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:33,020 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:33,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:33,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311393425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:33,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:33,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-20 09:43:33,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420633753] [2024-11-20 09:43:33,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:33,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 09:43:33,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:33,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 09:43:33,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:43:33,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:33,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 293 flow. Second operand has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:33,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:33,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:33,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:33,548 INFO L124 PetriNetUnfolderBase]: 770/1153 cut-off events. [2024-11-20 09:43:33,548 INFO L125 PetriNetUnfolderBase]: For 3012/3012 co-relation queries the response was YES. [2024-11-20 09:43:33,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4440 conditions, 1153 events. 770/1153 cut-off events. For 3012/3012 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4521 event pairs, 143 based on Foata normal form. 14/1166 useless extension candidates. Maximal degree in co-relation 4412. Up to 385 conditions per place. [2024-11-20 09:43:33,554 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 92 selfloop transitions, 71 changer transitions 0/164 dead transitions. [2024-11-20 09:43:33,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 164 transitions, 1336 flow [2024-11-20 09:43:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 09:43:33,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-20 09:43:33,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 182 transitions. [2024-11-20 09:43:33,556 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37448559670781895 [2024-11-20 09:43:33,556 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 293 flow. Second operand 18 states and 182 transitions. [2024-11-20 09:43:33,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 164 transitions, 1336 flow [2024-11-20 09:43:33,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 164 transitions, 1216 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-11-20 09:43:33,565 INFO L231 Difference]: Finished difference. Result has 63 places, 99 transitions, 830 flow [2024-11-20 09:43:33,566 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=830, PETRI_PLACES=63, PETRI_TRANSITIONS=99} [2024-11-20 09:43:33,568 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2024-11-20 09:43:33,569 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 99 transitions, 830 flow [2024-11-20 09:43:33,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.5) internal successors, (91), 14 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:33,569 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:33,569 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:33,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 09:43:33,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:33,770 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:33,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:33,771 INFO L85 PathProgramCache]: Analyzing trace with hash 910923729, now seen corresponding path program 5 times [2024-11-20 09:43:33,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:33,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046209649] [2024-11-20 09:43:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:33,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:33,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:33,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046209649] [2024-11-20 09:43:33,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046209649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:33,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160691331] [2024-11-20 09:43:33,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:43:33,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:33,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:33,875 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) [2024-11-20 09:43:33,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 09:43:33,928 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:43:33,928 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:33,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:43:33,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:33,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:34,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160691331] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:34,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:34,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:43:34,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875880767] [2024-11-20 09:43:34,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:34,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:43:34,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:34,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:43:34,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:43:34,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:34,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 99 transitions, 830 flow. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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) [2024-11-20 09:43:34,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:34,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:34,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:34,402 INFO L124 PetriNetUnfolderBase]: 753/1118 cut-off events. [2024-11-20 09:43:34,402 INFO L125 PetriNetUnfolderBase]: For 3028/3028 co-relation queries the response was YES. [2024-11-20 09:43:34,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4772 conditions, 1118 events. 753/1118 cut-off events. For 3028/3028 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4271 event pairs, 170 based on Foata normal form. 12/1130 useless extension candidates. Maximal degree in co-relation 4741. Up to 504 conditions per place. [2024-11-20 09:43:34,410 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 79 selfloop transitions, 75 changer transitions 0/155 dead transitions. [2024-11-20 09:43:34,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 155 transitions, 1379 flow [2024-11-20 09:43:34,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:43:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:43:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 143 transitions. [2024-11-20 09:43:34,412 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3783068783068783 [2024-11-20 09:43:34,412 INFO L175 Difference]: Start difference. First operand has 63 places, 99 transitions, 830 flow. Second operand 14 states and 143 transitions. [2024-11-20 09:43:34,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 155 transitions, 1379 flow [2024-11-20 09:43:34,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 155 transitions, 1244 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-11-20 09:43:34,425 INFO L231 Difference]: Finished difference. Result has 74 places, 117 transitions, 983 flow [2024-11-20 09:43:34,425 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=983, PETRI_PLACES=74, PETRI_TRANSITIONS=117} [2024-11-20 09:43:34,448 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 45 predicate places. [2024-11-20 09:43:34,448 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 117 transitions, 983 flow [2024-11-20 09:43:34,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 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) [2024-11-20 09:43:34,448 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:34,448 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:34,460 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 09:43:34,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:34,649 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:34,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:34,651 INFO L85 PathProgramCache]: Analyzing trace with hash -193223073, now seen corresponding path program 6 times [2024-11-20 09:43:34,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:34,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112857624] [2024-11-20 09:43:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:34,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:34,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:34,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112857624] [2024-11-20 09:43:34,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112857624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:34,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359440899] [2024-11-20 09:43:34,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:43:34,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:34,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:34,755 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) [2024-11-20 09:43:34,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 09:43:34,811 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 09:43:34,811 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:34,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:43:34,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:34,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:34,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359440899] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:34,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:43:34,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-20 09:43:34,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994461853] [2024-11-20 09:43:34,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:34,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 09:43:34,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:34,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 09:43:34,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-20 09:43:34,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:34,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 117 transitions, 983 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2024-11-20 09:43:34,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:34,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:34,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:35,091 INFO L124 PetriNetUnfolderBase]: 736/1083 cut-off events. [2024-11-20 09:43:35,091 INFO L125 PetriNetUnfolderBase]: For 3363/3363 co-relation queries the response was YES. [2024-11-20 09:43:35,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4831 conditions, 1083 events. 736/1083 cut-off events. For 3363/3363 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4011 event pairs, 191 based on Foata normal form. 12/1095 useless extension candidates. Maximal degree in co-relation 4796. Up to 619 conditions per place. [2024-11-20 09:43:35,097 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 82 selfloop transitions, 50 changer transitions 0/133 dead transitions. [2024-11-20 09:43:35,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 133 transitions, 1283 flow [2024-11-20 09:43:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:43:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:43:35,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-11-20 09:43:35,098 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-11-20 09:43:35,099 INFO L175 Difference]: Start difference. First operand has 74 places, 117 transitions, 983 flow. Second operand 7 states and 81 transitions. [2024-11-20 09:43:35,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 133 transitions, 1283 flow [2024-11-20 09:43:35,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 133 transitions, 1200 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-20 09:43:35,112 INFO L231 Difference]: Finished difference. Result has 72 places, 113 transitions, 964 flow [2024-11-20 09:43:35,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=964, PETRI_PLACES=72, PETRI_TRANSITIONS=113} [2024-11-20 09:43:35,113 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2024-11-20 09:43:35,113 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 113 transitions, 964 flow [2024-11-20 09:43:35,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2024-11-20 09:43:35,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:35,113 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:35,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 09:43:35,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:35,314 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:35,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:35,315 INFO L85 PathProgramCache]: Analyzing trace with hash -175012763, now seen corresponding path program 1 times [2024-11-20 09:43:35,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:35,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142389001] [2024-11-20 09:43:35,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:35,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:35,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:35,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142389001] [2024-11-20 09:43:35,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142389001] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:35,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932623470] [2024-11-20 09:43:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:35,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:35,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:35,376 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) [2024-11-20 09:43:35,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 09:43:35,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:35,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:43:35,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:35,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:35,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932623470] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:35,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:43:35,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-20 09:43:35,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439218366] [2024-11-20 09:43:35,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:35,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:43:35,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:43:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-20 09:43:35,506 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:35,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 113 transitions, 964 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:35,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:35,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:35,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:35,610 INFO L124 PetriNetUnfolderBase]: 721/1053 cut-off events. [2024-11-20 09:43:35,610 INFO L125 PetriNetUnfolderBase]: For 3327/3327 co-relation queries the response was YES. [2024-11-20 09:43:35,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4574 conditions, 1053 events. 721/1053 cut-off events. For 3327/3327 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3815 event pairs, 200 based on Foata normal form. 70/1123 useless extension candidates. Maximal degree in co-relation 4539. Up to 816 conditions per place. [2024-11-20 09:43:35,617 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 122 selfloop transitions, 14 changer transitions 0/137 dead transitions. [2024-11-20 09:43:35,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 137 transitions, 1426 flow [2024-11-20 09:43:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:43:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:43:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-11-20 09:43:35,618 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-11-20 09:43:35,618 INFO L175 Difference]: Start difference. First operand has 72 places, 113 transitions, 964 flow. Second operand 5 states and 56 transitions. [2024-11-20 09:43:35,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 137 transitions, 1426 flow [2024-11-20 09:43:35,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 137 transitions, 1304 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-20 09:43:35,627 INFO L231 Difference]: Finished difference. Result has 71 places, 114 transitions, 922 flow [2024-11-20 09:43:35,627 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=922, PETRI_PLACES=71, PETRI_TRANSITIONS=114} [2024-11-20 09:43:35,627 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 42 predicate places. [2024-11-20 09:43:35,627 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 114 transitions, 922 flow [2024-11-20 09:43:35,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:35,628 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:35,628 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:35,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 09:43:35,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:35,833 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:35,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:35,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1433195013, now seen corresponding path program 1 times [2024-11-20 09:43:35,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:35,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583802054] [2024-11-20 09:43:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:35,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:36,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:36,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583802054] [2024-11-20 09:43:36,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583802054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:36,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932074310] [2024-11-20 09:43:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:36,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:36,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:36,208 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) [2024-11-20 09:43:36,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 09:43:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:36,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-20 09:43:36,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:36,309 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 [2024-11-20 09:43:36,456 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:43:36,457 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 19 treesize of output 15 [2024-11-20 09:43:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:36,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:36,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932074310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:36,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:36,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-11-20 09:43:36,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024160634] [2024-11-20 09:43:36,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:36,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 09:43:36,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:36,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 09:43:36,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2024-11-20 09:43:36,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:36,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 114 transitions, 922 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-20 09:43:36,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:36,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:36,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:37,663 INFO L124 PetriNetUnfolderBase]: 1614/2340 cut-off events. [2024-11-20 09:43:37,663 INFO L125 PetriNetUnfolderBase]: For 6161/6161 co-relation queries the response was YES. [2024-11-20 09:43:37,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10926 conditions, 2340 events. 1614/2340 cut-off events. For 6161/6161 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9912 event pairs, 91 based on Foata normal form. 1/2341 useless extension candidates. Maximal degree in co-relation 9118. Up to 1292 conditions per place. [2024-11-20 09:43:37,704 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 259 selfloop transitions, 234 changer transitions 1/495 dead transitions. [2024-11-20 09:43:37,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 495 transitions, 4909 flow [2024-11-20 09:43:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 09:43:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-20 09:43:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 280 transitions. [2024-11-20 09:43:37,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4713804713804714 [2024-11-20 09:43:37,705 INFO L175 Difference]: Start difference. First operand has 71 places, 114 transitions, 922 flow. Second operand 22 states and 280 transitions. [2024-11-20 09:43:37,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 495 transitions, 4909 flow [2024-11-20 09:43:37,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 495 transitions, 4866 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-20 09:43:37,736 INFO L231 Difference]: Finished difference. Result has 106 places, 318 transitions, 3643 flow [2024-11-20 09:43:37,736 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3643, PETRI_PLACES=106, PETRI_TRANSITIONS=318} [2024-11-20 09:43:37,737 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 77 predicate places. [2024-11-20 09:43:37,737 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 318 transitions, 3643 flow [2024-11-20 09:43:37,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-20 09:43:37,738 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:37,738 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:37,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 09:43:37,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-20 09:43:37,939 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:37,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:37,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1372818606, now seen corresponding path program 1 times [2024-11-20 09:43:37,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:37,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984494963] [2024-11-20 09:43:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:37,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:38,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:38,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:38,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984494963] [2024-11-20 09:43:38,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984494963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:38,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384229073] [2024-11-20 09:43:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:38,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:38,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:38,298 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:38,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 09:43:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:38,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-20 09:43:38,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:38,379 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 15 treesize of output 1 [2024-11-20 09:43:38,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 09:43:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:38,511 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:38,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384229073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:38,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:38,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-20 09:43:38,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985400110] [2024-11-20 09:43:38,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:38,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:43:38,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:38,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:43:38,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:43:38,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:38,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 318 transitions, 3643 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-20 09:43:38,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:38,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:38,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:39,170 INFO L124 PetriNetUnfolderBase]: 1893/2729 cut-off events. [2024-11-20 09:43:39,170 INFO L125 PetriNetUnfolderBase]: For 13384/13384 co-relation queries the response was YES. [2024-11-20 09:43:39,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15806 conditions, 2729 events. 1893/2729 cut-off events. For 13384/13384 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11740 event pairs, 138 based on Foata normal form. 1/2730 useless extension candidates. Maximal degree in co-relation 14578. Up to 1631 conditions per place. [2024-11-20 09:43:39,189 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 236 selfloop transitions, 214 changer transitions 1/452 dead transitions. [2024-11-20 09:43:39,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 452 transitions, 5905 flow [2024-11-20 09:43:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:43:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:43:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-11-20 09:43:39,192 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-11-20 09:43:39,193 INFO L175 Difference]: Start difference. First operand has 106 places, 318 transitions, 3643 flow. Second operand 9 states and 123 transitions. [2024-11-20 09:43:39,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 452 transitions, 5905 flow [2024-11-20 09:43:39,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 452 transitions, 5545 flow, removed 151 selfloop flow, removed 3 redundant places. [2024-11-20 09:43:39,267 INFO L231 Difference]: Finished difference. Result has 114 places, 368 transitions, 4509 flow [2024-11-20 09:43:39,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=3355, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4509, PETRI_PLACES=114, PETRI_TRANSITIONS=368} [2024-11-20 09:43:39,268 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 85 predicate places. [2024-11-20 09:43:39,268 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 368 transitions, 4509 flow [2024-11-20 09:43:39,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-20 09:43:39,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:39,268 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:39,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 09:43:39,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-20 09:43:39,473 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:39,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:39,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1084980243, now seen corresponding path program 2 times [2024-11-20 09:43:39,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:39,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404584027] [2024-11-20 09:43:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:39,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:39,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:39,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404584027] [2024-11-20 09:43:39,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404584027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:39,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426800856] [2024-11-20 09:43:39,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:43:39,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:39,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:39,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:39,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 09:43:39,847 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:43:39,847 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:39,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-20 09:43:39,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:39,881 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 [2024-11-20 09:43:40,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 09:43:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:40,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:40,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426800856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:40,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:40,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-11-20 09:43:40,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199552043] [2024-11-20 09:43:40,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:40,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 09:43:40,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:40,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 09:43:40,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-11-20 09:43:40,322 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:40,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 368 transitions, 4509 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-20 09:43:40,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:40,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:40,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:41,421 INFO L124 PetriNetUnfolderBase]: 2149/3099 cut-off events. [2024-11-20 09:43:41,421 INFO L125 PetriNetUnfolderBase]: For 17583/17583 co-relation queries the response was YES. [2024-11-20 09:43:41,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19194 conditions, 3099 events. 2149/3099 cut-off events. For 17583/17583 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 13716 event pairs, 197 based on Foata normal form. 2/3101 useless extension candidates. Maximal degree in co-relation 17988. Up to 2587 conditions per place. [2024-11-20 09:43:41,440 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 372 selfloop transitions, 165 changer transitions 2/540 dead transitions. [2024-11-20 09:43:41,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 540 transitions, 7190 flow [2024-11-20 09:43:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-20 09:43:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-20 09:43:41,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 263 transitions. [2024-11-20 09:43:41,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4058641975308642 [2024-11-20 09:43:41,442 INFO L175 Difference]: Start difference. First operand has 114 places, 368 transitions, 4509 flow. Second operand 24 states and 263 transitions. [2024-11-20 09:43:41,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 540 transitions, 7190 flow [2024-11-20 09:43:41,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 540 transitions, 6800 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-11-20 09:43:41,541 INFO L231 Difference]: Finished difference. Result has 143 places, 440 transitions, 5585 flow [2024-11-20 09:43:41,541 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4199, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5585, PETRI_PLACES=143, PETRI_TRANSITIONS=440} [2024-11-20 09:43:41,542 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2024-11-20 09:43:41,542 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 440 transitions, 5585 flow [2024-11-20 09:43:41,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-20 09:43:41,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:41,542 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:41,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-20 09:43:41,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-20 09:43:41,743 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:41,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:41,743 INFO L85 PathProgramCache]: Analyzing trace with hash 906925894, now seen corresponding path program 2 times [2024-11-20 09:43:41,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:41,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56537101] [2024-11-20 09:43:41,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:41,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:42,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:42,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56537101] [2024-11-20 09:43:42,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56537101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:42,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111947911] [2024-11-20 09:43:42,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:43:42,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:42,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:42,057 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:42,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 09:43:42,109 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:43:42,110 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:42,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:43:42,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:42,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 09:43:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:42,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:42,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:43:42,300 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 28 treesize of output 21 [2024-11-20 09:43:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:42,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111947911] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:42,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:42,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-20 09:43:42,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016068145] [2024-11-20 09:43:42,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:42,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:43:42,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:42,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:43:42,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:43:42,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:42,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 440 transitions, 5585 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-20 09:43:42,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:42,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:42,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:43,219 INFO L124 PetriNetUnfolderBase]: 2552/3650 cut-off events. [2024-11-20 09:43:43,219 INFO L125 PetriNetUnfolderBase]: For 22863/22863 co-relation queries the response was YES. [2024-11-20 09:43:43,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23387 conditions, 3650 events. 2552/3650 cut-off events. For 22863/22863 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 16427 event pairs, 254 based on Foata normal form. 1/3651 useless extension candidates. Maximal degree in co-relation 23051. Up to 2972 conditions per place. [2024-11-20 09:43:43,242 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 395 selfloop transitions, 192 changer transitions 1/589 dead transitions. [2024-11-20 09:43:43,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 589 transitions, 8513 flow [2024-11-20 09:43:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:43:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:43:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-11-20 09:43:43,243 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-11-20 09:43:43,243 INFO L175 Difference]: Start difference. First operand has 143 places, 440 transitions, 5585 flow. Second operand 9 states and 117 transitions. [2024-11-20 09:43:43,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 589 transitions, 8513 flow [2024-11-20 09:43:43,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 589 transitions, 8237 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-11-20 09:43:43,382 INFO L231 Difference]: Finished difference. Result has 146 places, 520 transitions, 6996 flow [2024-11-20 09:43:43,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5361, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6996, PETRI_PLACES=146, PETRI_TRANSITIONS=520} [2024-11-20 09:43:43,383 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2024-11-20 09:43:43,383 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 520 transitions, 6996 flow [2024-11-20 09:43:43,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-20 09:43:43,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:43,383 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:43,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 09:43:43,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-20 09:43:43,584 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:43,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:43,584 INFO L85 PathProgramCache]: Analyzing trace with hash 488516362, now seen corresponding path program 3 times [2024-11-20 09:43:43,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:43,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549958522] [2024-11-20 09:43:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:43,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:43,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:43,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549958522] [2024-11-20 09:43:43,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549958522] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:43,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705395118] [2024-11-20 09:43:43,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:43:43,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:43,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:43,917 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:43,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 09:43:43,971 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:43:43,972 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:43,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:43:43,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:44,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 09:43:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:44,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:44,172 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:43:44,172 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 28 treesize of output 21 [2024-11-20 09:43:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:44,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705395118] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:44,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:44,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-20 09:43:44,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582620700] [2024-11-20 09:43:44,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:44,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:43:44,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:44,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:43:44,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:43:44,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:44,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 520 transitions, 6996 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-20 09:43:44,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:44,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:44,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:45,139 INFO L124 PetriNetUnfolderBase]: 2681/3837 cut-off events. [2024-11-20 09:43:45,139 INFO L125 PetriNetUnfolderBase]: For 27317/27317 co-relation queries the response was YES. [2024-11-20 09:43:45,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25619 conditions, 3837 events. 2681/3837 cut-off events. For 27317/27317 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 17450 event pairs, 264 based on Foata normal form. 1/3838 useless extension candidates. Maximal degree in co-relation 25300. Up to 3332 conditions per place. [2024-11-20 09:43:45,165 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 435 selfloop transitions, 140 changer transitions 1/577 dead transitions. [2024-11-20 09:43:45,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 577 transitions, 8710 flow [2024-11-20 09:43:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:43:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:43:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-11-20 09:43:45,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4732510288065844 [2024-11-20 09:43:45,166 INFO L175 Difference]: Start difference. First operand has 146 places, 520 transitions, 6996 flow. Second operand 9 states and 115 transitions. [2024-11-20 09:43:45,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 577 transitions, 8710 flow [2024-11-20 09:43:45,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 577 transitions, 8463 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-11-20 09:43:45,409 INFO L231 Difference]: Finished difference. Result has 152 places, 527 transitions, 7154 flow [2024-11-20 09:43:45,409 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7154, PETRI_PLACES=152, PETRI_TRANSITIONS=527} [2024-11-20 09:43:45,409 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 123 predicate places. [2024-11-20 09:43:45,409 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 527 transitions, 7154 flow [2024-11-20 09:43:45,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-20 09:43:45,410 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:45,410 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:45,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-20 09:43:45,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-20 09:43:45,610 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:45,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:45,611 INFO L85 PathProgramCache]: Analyzing trace with hash -462631155, now seen corresponding path program 3 times [2024-11-20 09:43:45,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:45,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729313364] [2024-11-20 09:43:45,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:45,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:46,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:46,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729313364] [2024-11-20 09:43:46,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729313364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:46,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941669955] [2024-11-20 09:43:46,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:43:46,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:46,053 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:46,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 09:43:46,112 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-20 09:43:46,112 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:46,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-20 09:43:46,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:46,143 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 [2024-11-20 09:43:46,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 09:43:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:46,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:46,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941669955] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:46,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:46,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-11-20 09:43:46,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592495901] [2024-11-20 09:43:46,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:46,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 09:43:46,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:46,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 09:43:46,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2024-11-20 09:43:46,591 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:46,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 527 transitions, 7154 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-20 09:43:46,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:46,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:46,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:47,649 INFO L124 PetriNetUnfolderBase]: 2848/4083 cut-off events. [2024-11-20 09:43:47,650 INFO L125 PetriNetUnfolderBase]: For 29650/29650 co-relation queries the response was YES. [2024-11-20 09:43:47,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27024 conditions, 4083 events. 2848/4083 cut-off events. For 29650/29650 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 18916 event pairs, 314 based on Foata normal form. 1/4084 useless extension candidates. Maximal degree in co-relation 26700. Up to 3557 conditions per place. [2024-11-20 09:43:47,678 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 470 selfloop transitions, 169 changer transitions 1/641 dead transitions. [2024-11-20 09:43:47,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 641 transitions, 9505 flow [2024-11-20 09:43:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-20 09:43:47,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-20 09:43:47,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 247 transitions. [2024-11-20 09:43:47,679 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4158249158249158 [2024-11-20 09:43:47,679 INFO L175 Difference]: Start difference. First operand has 152 places, 527 transitions, 7154 flow. Second operand 22 states and 247 transitions. [2024-11-20 09:43:47,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 641 transitions, 9505 flow [2024-11-20 09:43:47,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 641 transitions, 9266 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-11-20 09:43:47,893 INFO L231 Difference]: Finished difference. Result has 171 places, 556 transitions, 7657 flow [2024-11-20 09:43:47,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6926, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7657, PETRI_PLACES=171, PETRI_TRANSITIONS=556} [2024-11-20 09:43:47,894 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 142 predicate places. [2024-11-20 09:43:47,894 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 556 transitions, 7657 flow [2024-11-20 09:43:47,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-20 09:43:47,894 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:47,894 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:47,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-20 09:43:48,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-20 09:43:48,095 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:48,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:48,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2090506375, now seen corresponding path program 4 times [2024-11-20 09:43:48,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:48,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135562090] [2024-11-20 09:43:48,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:48,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:48,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:48,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:48,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135562090] [2024-11-20 09:43:48,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135562090] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:48,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866428667] [2024-11-20 09:43:48,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:43:48,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:48,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:48,494 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:48,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 09:43:48,549 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:43:48,549 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:48,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-20 09:43:48,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:48,581 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 [2024-11-20 09:43:48,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 09:43:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:48,793 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:49,081 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 38 treesize of output 34 [2024-11-20 09:43:49,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:43:49,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2024-11-20 09:43:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:50,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866428667] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:50,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:50,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-20 09:43:50,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808671428] [2024-11-20 09:43:50,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:50,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 09:43:50,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:50,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 09:43:50,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-11-20 09:43:50,054 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:50,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 556 transitions, 7657 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 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) [2024-11-20 09:43:50,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:50,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:50,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:51,232 INFO L124 PetriNetUnfolderBase]: 3283/4678 cut-off events. [2024-11-20 09:43:51,232 INFO L125 PetriNetUnfolderBase]: For 35723/35723 co-relation queries the response was YES. [2024-11-20 09:43:51,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31302 conditions, 4678 events. 3283/4678 cut-off events. For 35723/35723 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21925 event pairs, 337 based on Foata normal form. 2/4680 useless extension candidates. Maximal degree in co-relation 30965. Up to 3695 conditions per place. [2024-11-20 09:43:51,271 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 496 selfloop transitions, 208 changer transitions 2/707 dead transitions. [2024-11-20 09:43:51,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 707 transitions, 10804 flow [2024-11-20 09:43:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 09:43:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 09:43:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 196 transitions. [2024-11-20 09:43:51,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4839506172839506 [2024-11-20 09:43:51,273 INFO L175 Difference]: Start difference. First operand has 171 places, 556 transitions, 7657 flow. Second operand 15 states and 196 transitions. [2024-11-20 09:43:51,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 707 transitions, 10804 flow [2024-11-20 09:43:51,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 707 transitions, 10518 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-11-20 09:43:51,542 INFO L231 Difference]: Finished difference. Result has 186 places, 614 transitions, 8847 flow [2024-11-20 09:43:51,543 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7398, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8847, PETRI_PLACES=186, PETRI_TRANSITIONS=614} [2024-11-20 09:43:51,543 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-11-20 09:43:51,543 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 614 transitions, 8847 flow [2024-11-20 09:43:51,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 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) [2024-11-20 09:43:51,543 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:51,544 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:51,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-20 09:43:51,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:51,744 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:51,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:51,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1013399012, now seen corresponding path program 4 times [2024-11-20 09:43:51,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:51,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430638161] [2024-11-20 09:43:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:51,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:52,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:52,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:52,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430638161] [2024-11-20 09:43:52,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430638161] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:52,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961918723] [2024-11-20 09:43:52,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:43:52,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:52,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:52,046 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:52,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 09:43:52,101 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:43:52,101 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:52,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 09:43:52,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:52,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 09:43:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:52,224 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:52,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:43:52,266 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 28 treesize of output 21 [2024-11-20 09:43:52,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:52,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961918723] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:52,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:52,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 16 [2024-11-20 09:43:52,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668419046] [2024-11-20 09:43:52,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:52,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 09:43:52,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:52,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 09:43:52,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-11-20 09:43:52,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:52,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 614 transitions, 8847 flow. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 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) [2024-11-20 09:43:52,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:52,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:52,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:53,264 INFO L124 PetriNetUnfolderBase]: 3412/4865 cut-off events. [2024-11-20 09:43:53,264 INFO L125 PetriNetUnfolderBase]: For 43009/43009 co-relation queries the response was YES. [2024-11-20 09:43:53,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34449 conditions, 4865 events. 3412/4865 cut-off events. For 43009/43009 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 23014 event pairs, 372 based on Foata normal form. 1/4866 useless extension candidates. Maximal degree in co-relation 34087. Up to 4344 conditions per place. [2024-11-20 09:43:53,295 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 505 selfloop transitions, 161 changer transitions 1/668 dead transitions. [2024-11-20 09:43:53,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 668 transitions, 10806 flow [2024-11-20 09:43:53,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:43:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:43:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-11-20 09:43:53,296 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4609053497942387 [2024-11-20 09:43:53,296 INFO L175 Difference]: Start difference. First operand has 186 places, 614 transitions, 8847 flow. Second operand 9 states and 112 transitions. [2024-11-20 09:43:53,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 668 transitions, 10806 flow [2024-11-20 09:43:53,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 668 transitions, 10397 flow, removed 178 selfloop flow, removed 3 redundant places. [2024-11-20 09:43:53,630 INFO L231 Difference]: Finished difference. Result has 193 places, 621 transitions, 8915 flow [2024-11-20 09:43:53,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8446, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8915, PETRI_PLACES=193, PETRI_TRANSITIONS=621} [2024-11-20 09:43:53,630 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 164 predicate places. [2024-11-20 09:43:53,630 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 621 transitions, 8915 flow [2024-11-20 09:43:53,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 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) [2024-11-20 09:43:53,631 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:53,631 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:53,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-20 09:43:53,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:53,831 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:53,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1664739096, now seen corresponding path program 5 times [2024-11-20 09:43:53,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:53,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743529443] [2024-11-20 09:43:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:53,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:54,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:54,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743529443] [2024-11-20 09:43:54,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743529443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:54,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671533850] [2024-11-20 09:43:54,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:43:54,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:54,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:54,088 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:54,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 09:43:54,148 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:43:54,148 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:54,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 09:43:54,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:54,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 09:43:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:54,286 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:54,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:43:54,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2024-11-20 09:43:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:54,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671533850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:54,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:54,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 16 [2024-11-20 09:43:54,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78980491] [2024-11-20 09:43:54,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:54,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 09:43:54,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 09:43:54,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-20 09:43:54,528 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:54,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 621 transitions, 8915 flow. Second operand has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 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) [2024-11-20 09:43:54,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:54,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:54,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:55,599 INFO L124 PetriNetUnfolderBase]: 3579/5106 cut-off events. [2024-11-20 09:43:55,599 INFO L125 PetriNetUnfolderBase]: For 44842/44842 co-relation queries the response was YES. [2024-11-20 09:43:55,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35471 conditions, 5106 events. 3579/5106 cut-off events. For 44842/44842 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 24410 event pairs, 331 based on Foata normal form. 1/5107 useless extension candidates. Maximal degree in co-relation 35109. Up to 4433 conditions per place. [2024-11-20 09:43:55,648 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 517 selfloop transitions, 162 changer transitions 1/681 dead transitions. [2024-11-20 09:43:55,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 681 transitions, 10989 flow [2024-11-20 09:43:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:43:55,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:43:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-11-20 09:43:55,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46502057613168724 [2024-11-20 09:43:55,649 INFO L175 Difference]: Start difference. First operand has 193 places, 621 transitions, 8915 flow. Second operand 9 states and 113 transitions. [2024-11-20 09:43:55,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 681 transitions, 10989 flow [2024-11-20 09:43:56,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 681 transitions, 10704 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-11-20 09:43:56,015 INFO L231 Difference]: Finished difference. Result has 199 places, 633 transitions, 9228 flow [2024-11-20 09:43:56,016 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8630, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9228, PETRI_PLACES=199, PETRI_TRANSITIONS=633} [2024-11-20 09:43:56,016 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 170 predicate places. [2024-11-20 09:43:56,016 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 633 transitions, 9228 flow [2024-11-20 09:43:56,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.294117647058823) internal successors, (124), 17 states have internal predecessors, (124), 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) [2024-11-20 09:43:56,016 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:56,016 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:56,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-20 09:43:56,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:56,217 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:56,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:56,217 INFO L85 PathProgramCache]: Analyzing trace with hash -166591874, now seen corresponding path program 6 times [2024-11-20 09:43:56,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:56,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764306087] [2024-11-20 09:43:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:56,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:56,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:56,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764306087] [2024-11-20 09:43:56,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764306087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:56,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360811776] [2024-11-20 09:43:56,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:43:56,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:56,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:56,491 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:56,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 09:43:56,546 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 09:43:56,547 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:56,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 09:43:56,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:56,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 09:43:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:56,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:56,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:43:56,728 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 28 treesize of output 21 [2024-11-20 09:43:56,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:43:56,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360811776] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:56,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:56,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-20 09:43:56,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056946498] [2024-11-20 09:43:56,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:56,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:43:56,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:43:56,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:43:56,957 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:56,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 633 transitions, 9228 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-20 09:43:56,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:56,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:56,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:57,720 INFO L124 PetriNetUnfolderBase]: 3670/5239 cut-off events. [2024-11-20 09:43:57,721 INFO L125 PetriNetUnfolderBase]: For 48706/48706 co-relation queries the response was YES. [2024-11-20 09:43:57,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36823 conditions, 5239 events. 3670/5239 cut-off events. For 48706/48706 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 25171 event pairs, 465 based on Foata normal form. 1/5240 useless extension candidates. Maximal degree in co-relation 36455. Up to 4545 conditions per place. [2024-11-20 09:43:57,768 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 499 selfloop transitions, 214 changer transitions 1/715 dead transitions. [2024-11-20 09:43:57,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 715 transitions, 11685 flow [2024-11-20 09:43:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:43:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:43:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-11-20 09:43:57,770 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-11-20 09:43:57,770 INFO L175 Difference]: Start difference. First operand has 199 places, 633 transitions, 9228 flow. Second operand 9 states and 114 transitions. [2024-11-20 09:43:57,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 715 transitions, 11685 flow [2024-11-20 09:43:58,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 715 transitions, 11389 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-11-20 09:43:58,160 INFO L231 Difference]: Finished difference. Result has 205 places, 649 transitions, 9770 flow [2024-11-20 09:43:58,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8932, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9770, PETRI_PLACES=205, PETRI_TRANSITIONS=649} [2024-11-20 09:43:58,161 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 176 predicate places. [2024-11-20 09:43:58,161 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 649 transitions, 9770 flow [2024-11-20 09:43:58,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-20 09:43:58,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:58,161 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:58,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-20 09:43:58,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:58,362 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:43:58,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:58,362 INFO L85 PathProgramCache]: Analyzing trace with hash -2046509819, now seen corresponding path program 5 times [2024-11-20 09:43:58,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:58,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027771194] [2024-11-20 09:43:58,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:58,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:58,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:58,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027771194] [2024-11-20 09:43:58,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027771194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:43:58,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009304386] [2024-11-20 09:43:58,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:43:58,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:43:58,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:58,595 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:43:58,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 09:43:58,653 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:43:58,653 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:43:58,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-20 09:43:58,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:43:58,685 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 [2024-11-20 09:43:58,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 09:43:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:58,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:43:59,115 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 38 treesize of output 34 [2024-11-20 09:43:59,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:43:59,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2024-11-20 09:43:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:59,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009304386] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:43:59,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:43:59,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-20 09:43:59,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958269079] [2024-11-20 09:43:59,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:43:59,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 09:43:59,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:59,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 09:43:59,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-11-20 09:43:59,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:43:59,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 649 transitions, 9770 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 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) [2024-11-20 09:43:59,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:59,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:43:59,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:00,590 INFO L124 PetriNetUnfolderBase]: 3897/5570 cut-off events. [2024-11-20 09:44:00,590 INFO L125 PetriNetUnfolderBase]: For 55421/55421 co-relation queries the response was YES. [2024-11-20 09:44:00,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39658 conditions, 5570 events. 3897/5570 cut-off events. For 55421/55421 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 27057 event pairs, 482 based on Foata normal form. 2/5572 useless extension candidates. Maximal degree in co-relation 39284. Up to 4792 conditions per place. [2024-11-20 09:44:00,637 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 574 selfloop transitions, 176 changer transitions 2/753 dead transitions. [2024-11-20 09:44:00,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 753 transitions, 12506 flow [2024-11-20 09:44:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 09:44:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 09:44:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 172 transitions. [2024-11-20 09:44:00,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-11-20 09:44:00,639 INFO L175 Difference]: Start difference. First operand has 205 places, 649 transitions, 9770 flow. Second operand 14 states and 172 transitions. [2024-11-20 09:44:00,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 753 transitions, 12506 flow [2024-11-20 09:44:01,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 753 transitions, 11958 flow, removed 107 selfloop flow, removed 6 redundant places. [2024-11-20 09:44:01,162 INFO L231 Difference]: Finished difference. Result has 216 places, 682 transitions, 10106 flow [2024-11-20 09:44:01,162 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9222, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10106, PETRI_PLACES=216, PETRI_TRANSITIONS=682} [2024-11-20 09:44:01,163 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 187 predicate places. [2024-11-20 09:44:01,163 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 682 transitions, 10106 flow [2024-11-20 09:44:01,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 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) [2024-11-20 09:44:01,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:01,163 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:01,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:01,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:01,365 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:01,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:01,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1498972727, now seen corresponding path program 6 times [2024-11-20 09:44:01,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:01,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655897291] [2024-11-20 09:44:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:01,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:01,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:01,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655897291] [2024-11-20 09:44:01,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655897291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:01,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545239226] [2024-11-20 09:44:01,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:44:01,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:01,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:01,713 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:01,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 09:44:01,785 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 09:44:01,785 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:01,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-20 09:44:01,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:01,812 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 [2024-11-20 09:44:02,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-20 09:44:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:02,031 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:02,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545239226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:02,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:02,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-11-20 09:44:02,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035203341] [2024-11-20 09:44:02,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:02,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 09:44:02,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:02,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 09:44:02,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-20 09:44:02,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:02,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 682 transitions, 10106 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-20 09:44:02,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:02,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:02,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:03,844 INFO L124 PetriNetUnfolderBase]: 4134/5905 cut-off events. [2024-11-20 09:44:03,844 INFO L125 PetriNetUnfolderBase]: For 57767/57767 co-relation queries the response was YES. [2024-11-20 09:44:03,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41955 conditions, 5905 events. 4134/5905 cut-off events. For 57767/57767 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 29019 event pairs, 438 based on Foata normal form. 1/5906 useless extension candidates. Maximal degree in co-relation 41571. Up to 5172 conditions per place. [2024-11-20 09:44:03,893 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 585 selfloop transitions, 217 changer transitions 2/805 dead transitions. [2024-11-20 09:44:03,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 805 transitions, 12998 flow [2024-11-20 09:44:03,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-20 09:44:03,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-20 09:44:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 318 transitions. [2024-11-20 09:44:03,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-11-20 09:44:03,895 INFO L175 Difference]: Start difference. First operand has 216 places, 682 transitions, 10106 flow. Second operand 30 states and 318 transitions. [2024-11-20 09:44:03,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 805 transitions, 12998 flow [2024-11-20 09:44:04,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 805 transitions, 12691 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-11-20 09:44:04,358 INFO L231 Difference]: Finished difference. Result has 247 places, 708 transitions, 10753 flow [2024-11-20 09:44:04,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9844, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10753, PETRI_PLACES=247, PETRI_TRANSITIONS=708} [2024-11-20 09:44:04,358 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2024-11-20 09:44:04,359 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 708 transitions, 10753 flow [2024-11-20 09:44:04,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-20 09:44:04,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:04,359 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:04,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-20 09:44:04,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:04,559 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:04,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash 549068580, now seen corresponding path program 7 times [2024-11-20 09:44:04,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:04,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027709742] [2024-11-20 09:44:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:04,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:04,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:04,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027709742] [2024-11-20 09:44:04,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027709742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:04,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527486218] [2024-11-20 09:44:04,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:44:04,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:04,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:04,636 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:04,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 09:44:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:04,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:44:04,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:04,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:04,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527486218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:04,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:04,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-20 09:44:04,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933232022] [2024-11-20 09:44:04,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:04,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:44:04,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:04,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:44:04,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:44:04,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:04,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 708 transitions, 10753 flow. Second operand has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 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) [2024-11-20 09:44:04,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:04,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:04,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:05,946 INFO L124 PetriNetUnfolderBase]: 4851/6947 cut-off events. [2024-11-20 09:44:05,946 INFO L125 PetriNetUnfolderBase]: For 84500/84500 co-relation queries the response was YES. [2024-11-20 09:44:05,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50080 conditions, 6947 events. 4851/6947 cut-off events. For 84500/84500 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 35332 event pairs, 1272 based on Foata normal form. 242/7189 useless extension candidates. Maximal degree in co-relation 49630. Up to 4721 conditions per place. [2024-11-20 09:44:06,004 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 759 selfloop transitions, 62 changer transitions 0/822 dead transitions. [2024-11-20 09:44:06,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 822 transitions, 13766 flow [2024-11-20 09:44:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 09:44:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 09:44:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-11-20 09:44:06,006 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2024-11-20 09:44:06,006 INFO L175 Difference]: Start difference. First operand has 247 places, 708 transitions, 10753 flow. Second operand 8 states and 101 transitions. [2024-11-20 09:44:06,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 822 transitions, 13766 flow [2024-11-20 09:44:06,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 822 transitions, 13296 flow, removed 124 selfloop flow, removed 11 redundant places. [2024-11-20 09:44:06,658 INFO L231 Difference]: Finished difference. Result has 245 places, 679 transitions, 10181 flow [2024-11-20 09:44:06,659 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9641, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10181, PETRI_PLACES=245, PETRI_TRANSITIONS=679} [2024-11-20 09:44:06,660 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 216 predicate places. [2024-11-20 09:44:06,660 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 679 transitions, 10181 flow [2024-11-20 09:44:06,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.2) internal successors, (108), 15 states have internal predecessors, (108), 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) [2024-11-20 09:44:06,660 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:06,660 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:06,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-20 09:44:06,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-20 09:44:06,865 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:06,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:06,865 INFO L85 PathProgramCache]: Analyzing trace with hash -432103725, now seen corresponding path program 8 times [2024-11-20 09:44:06,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:06,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361157134] [2024-11-20 09:44:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:06,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:06,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:06,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361157134] [2024-11-20 09:44:06,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361157134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:06,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467961311] [2024-11-20 09:44:06,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:44:06,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:06,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:06,927 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:06,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 09:44:06,981 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:44:06,981 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:06,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:44:06,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:07,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:07,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467961311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:07,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:07,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 09:44:07,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364242437] [2024-11-20 09:44:07,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:07,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 09:44:07,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:07,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 09:44:07,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:44:07,058 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:07,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 679 transitions, 10181 flow. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:07,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:07,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:07,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:08,246 INFO L124 PetriNetUnfolderBase]: 4264/6259 cut-off events. [2024-11-20 09:44:08,246 INFO L125 PetriNetUnfolderBase]: For 80601/80601 co-relation queries the response was YES. [2024-11-20 09:44:08,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45331 conditions, 6259 events. 4264/6259 cut-off events. For 80601/80601 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 33060 event pairs, 1034 based on Foata normal form. 356/6615 useless extension candidates. Maximal degree in co-relation 44892. Up to 2220 conditions per place. [2024-11-20 09:44:08,317 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 684 selfloop transitions, 73 changer transitions 0/758 dead transitions. [2024-11-20 09:44:08,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 758 transitions, 12454 flow [2024-11-20 09:44:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:44:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:44:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-11-20 09:44:08,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-11-20 09:44:08,319 INFO L175 Difference]: Start difference. First operand has 245 places, 679 transitions, 10181 flow. Second operand 7 states and 95 transitions. [2024-11-20 09:44:08,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 758 transitions, 12454 flow [2024-11-20 09:44:08,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 758 transitions, 12389 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-11-20 09:44:09,003 INFO L231 Difference]: Finished difference. Result has 247 places, 647 transitions, 9936 flow [2024-11-20 09:44:09,003 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9612, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9936, PETRI_PLACES=247, PETRI_TRANSITIONS=647} [2024-11-20 09:44:09,004 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2024-11-20 09:44:09,004 INFO L471 AbstractCegarLoop]: Abstraction has has 247 places, 647 transitions, 9936 flow [2024-11-20 09:44:09,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:09,005 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:09,005 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:09,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:09,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-20 09:44:09,205 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:09,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:09,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1449287287, now seen corresponding path program 7 times [2024-11-20 09:44:09,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:09,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776965751] [2024-11-20 09:44:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:09,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:09,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:09,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776965751] [2024-11-20 09:44:09,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776965751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:09,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680119635] [2024-11-20 09:44:09,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:44:09,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:09,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:09,291 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:09,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-20 09:44:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:09,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:44:09,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:09,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:09,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:09,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:09,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680119635] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:09,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:09,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-20 09:44:09,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017679155] [2024-11-20 09:44:09,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:09,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:44:09,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:09,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:44:09,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:44:09,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:09,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 647 transitions, 9936 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 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) [2024-11-20 09:44:09,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:09,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:09,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:10,554 INFO L124 PetriNetUnfolderBase]: 3949/5868 cut-off events. [2024-11-20 09:44:10,554 INFO L125 PetriNetUnfolderBase]: For 73446/73446 co-relation queries the response was YES. [2024-11-20 09:44:10,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43567 conditions, 5868 events. 3949/5868 cut-off events. For 73446/73446 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 31576 event pairs, 987 based on Foata normal form. 164/6032 useless extension candidates. Maximal degree in co-relation 43146. Up to 2220 conditions per place. [2024-11-20 09:44:10,599 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 570 selfloop transitions, 136 changer transitions 72/779 dead transitions. [2024-11-20 09:44:10,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 779 transitions, 12944 flow [2024-11-20 09:44:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:44:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:44:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-11-20 09:44:10,600 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-11-20 09:44:10,600 INFO L175 Difference]: Start difference. First operand has 247 places, 647 transitions, 9936 flow. Second operand 7 states and 94 transitions. [2024-11-20 09:44:10,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 779 transitions, 12944 flow [2024-11-20 09:44:11,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 779 transitions, 12663 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-11-20 09:44:11,145 INFO L231 Difference]: Finished difference. Result has 250 places, 597 transitions, 9510 flow [2024-11-20 09:44:11,146 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9670, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9510, PETRI_PLACES=250, PETRI_TRANSITIONS=597} [2024-11-20 09:44:11,148 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 221 predicate places. [2024-11-20 09:44:11,148 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 597 transitions, 9510 flow [2024-11-20 09:44:11,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 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) [2024-11-20 09:44:11,148 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:11,148 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:11,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:11,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-20 09:44:11,349 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:11,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash 634867988, now seen corresponding path program 1 times [2024-11-20 09:44:11,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:11,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374685734] [2024-11-20 09:44:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:11,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:11,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:11,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374685734] [2024-11-20 09:44:11,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374685734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:11,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708152752] [2024-11-20 09:44:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:11,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:11,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:11,437 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:11,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-20 09:44:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:11,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:44:11,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:11,541 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:11,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708152752] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:11,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:11,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:44:11,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451227881] [2024-11-20 09:44:11,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:11,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 09:44:11,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:11,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 09:44:11,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-11-20 09:44:11,581 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:11,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 597 transitions, 9510 flow. Second operand has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 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) [2024-11-20 09:44:11,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:11,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:11,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:12,572 INFO L124 PetriNetUnfolderBase]: 3869/5798 cut-off events. [2024-11-20 09:44:12,573 INFO L125 PetriNetUnfolderBase]: For 78687/78687 co-relation queries the response was YES. [2024-11-20 09:44:12,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43965 conditions, 5798 events. 3869/5798 cut-off events. For 78687/78687 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 31644 event pairs, 863 based on Foata normal form. 82/5880 useless extension candidates. Maximal degree in co-relation 43551. Up to 2220 conditions per place. [2024-11-20 09:44:12,629 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 573 selfloop transitions, 127 changer transitions 43/744 dead transitions. [2024-11-20 09:44:12,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 744 transitions, 12510 flow [2024-11-20 09:44:12,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:44:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:44:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-11-20 09:44:12,630 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-11-20 09:44:12,630 INFO L175 Difference]: Start difference. First operand has 250 places, 597 transitions, 9510 flow. Second operand 10 states and 134 transitions. [2024-11-20 09:44:12,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 744 transitions, 12510 flow [2024-11-20 09:44:13,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 744 transitions, 12475 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-11-20 09:44:13,245 INFO L231 Difference]: Finished difference. Result has 260 places, 587 transitions, 9684 flow [2024-11-20 09:44:13,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9477, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9684, PETRI_PLACES=260, PETRI_TRANSITIONS=587} [2024-11-20 09:44:13,246 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 231 predicate places. [2024-11-20 09:44:13,246 INFO L471 AbstractCegarLoop]: Abstraction has has 260 places, 587 transitions, 9684 flow [2024-11-20 09:44:13,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 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) [2024-11-20 09:44:13,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:13,246 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:13,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:13,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:13,447 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:13,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:13,447 INFO L85 PathProgramCache]: Analyzing trace with hash -799816665, now seen corresponding path program 9 times [2024-11-20 09:44:13,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:13,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241295831] [2024-11-20 09:44:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:13,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:13,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:13,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241295831] [2024-11-20 09:44:13,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241295831] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:13,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953214966] [2024-11-20 09:44:13,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:44:13,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:13,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:13,515 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:13,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-20 09:44:13,577 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:44:13,577 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:13,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:44:13,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:13,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:13,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953214966] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:13,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:13,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 09:44:13,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239390537] [2024-11-20 09:44:13,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:13,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 09:44:13,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:13,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 09:44:13,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:44:13,714 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:13,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 587 transitions, 9684 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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) [2024-11-20 09:44:13,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:13,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:13,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:14,411 INFO L124 PetriNetUnfolderBase]: 2743/4178 cut-off events. [2024-11-20 09:44:14,412 INFO L125 PetriNetUnfolderBase]: For 68083/68083 co-relation queries the response was YES. [2024-11-20 09:44:14,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33934 conditions, 4178 events. 2743/4178 cut-off events. For 68083/68083 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 21889 event pairs, 749 based on Foata normal form. 160/4338 useless extension candidates. Maximal degree in co-relation 33836. Up to 2220 conditions per place. [2024-11-20 09:44:14,452 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 425 selfloop transitions, 79 changer transitions 92/597 dead transitions. [2024-11-20 09:44:14,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 597 transitions, 10926 flow [2024-11-20 09:44:14,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:44:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:44:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 92 transitions. [2024-11-20 09:44:14,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-11-20 09:44:14,453 INFO L175 Difference]: Start difference. First operand has 260 places, 587 transitions, 9684 flow. Second operand 7 states and 92 transitions. [2024-11-20 09:44:14,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 597 transitions, 10926 flow [2024-11-20 09:44:14,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 597 transitions, 10445 flow, removed 73 selfloop flow, removed 12 redundant places. [2024-11-20 09:44:14,865 INFO L231 Difference]: Finished difference. Result has 246 places, 473 transitions, 7639 flow [2024-11-20 09:44:14,865 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8699, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7639, PETRI_PLACES=246, PETRI_TRANSITIONS=473} [2024-11-20 09:44:14,866 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 217 predicate places. [2024-11-20 09:44:14,866 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 473 transitions, 7639 flow [2024-11-20 09:44:14,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 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) [2024-11-20 09:44:14,866 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:14,866 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:14,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-20 09:44:15,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-20 09:44:15,067 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:15,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:15,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1270728760, now seen corresponding path program 2 times [2024-11-20 09:44:15,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:15,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978057878] [2024-11-20 09:44:15,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:15,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:15,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:15,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978057878] [2024-11-20 09:44:15,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978057878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:15,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716943113] [2024-11-20 09:44:15,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:44:15,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:15,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:15,140 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:15,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-20 09:44:15,195 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:44:15,195 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:15,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:44:15,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:15,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:15,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716943113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:15,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:15,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-20 09:44:15,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162268692] [2024-11-20 09:44:15,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:15,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 09:44:15,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 09:44:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-11-20 09:44:15,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:15,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 473 transitions, 7639 flow. Second operand has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 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) [2024-11-20 09:44:15,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:15,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:15,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:15,982 INFO L124 PetriNetUnfolderBase]: 2428/3706 cut-off events. [2024-11-20 09:44:15,982 INFO L125 PetriNetUnfolderBase]: For 51365/51365 co-relation queries the response was YES. [2024-11-20 09:44:16,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28639 conditions, 3706 events. 2428/3706 cut-off events. For 51365/51365 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 19155 event pairs, 663 based on Foata normal form. 82/3788 useless extension candidates. Maximal degree in co-relation 28545. Up to 2220 conditions per place. [2024-11-20 09:44:16,020 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 463 selfloop transitions, 99 changer transitions 26/589 dead transitions. [2024-11-20 09:44:16,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 589 transitions, 10117 flow [2024-11-20 09:44:16,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:44:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:44:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-11-20 09:44:16,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-11-20 09:44:16,024 INFO L175 Difference]: Start difference. First operand has 246 places, 473 transitions, 7639 flow. Second operand 10 states and 125 transitions. [2024-11-20 09:44:16,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 589 transitions, 10117 flow [2024-11-20 09:44:16,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 589 transitions, 9761 flow, removed 125 selfloop flow, removed 10 redundant places. [2024-11-20 09:44:16,376 INFO L231 Difference]: Finished difference. Result has 236 places, 486 transitions, 7772 flow [2024-11-20 09:44:16,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7402, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7772, PETRI_PLACES=236, PETRI_TRANSITIONS=486} [2024-11-20 09:44:16,377 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 207 predicate places. [2024-11-20 09:44:16,377 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 486 transitions, 7772 flow [2024-11-20 09:44:16,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.235294117647059) internal successors, (106), 17 states have internal predecessors, (106), 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) [2024-11-20 09:44:16,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:16,378 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:16,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-20 09:44:16,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-20 09:44:16,578 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:16,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:16,579 INFO L85 PathProgramCache]: Analyzing trace with hash -532697314, now seen corresponding path program 3 times [2024-11-20 09:44:16,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:16,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39040044] [2024-11-20 09:44:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:16,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:16,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:16,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39040044] [2024-11-20 09:44:16,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39040044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:16,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47820795] [2024-11-20 09:44:16,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:44:16,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:16,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:16,653 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:16,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-20 09:44:16,710 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 09:44:16,710 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:16,711 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:44:16,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:16,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47820795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:16,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:16,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-20 09:44:16,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067173497] [2024-11-20 09:44:16,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:16,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:44:16,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:44:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:44:16,821 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:16,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 486 transitions, 7772 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 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) [2024-11-20 09:44:16,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:16,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:16,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:17,529 INFO L124 PetriNetUnfolderBase]: 2275/3490 cut-off events. [2024-11-20 09:44:17,529 INFO L125 PetriNetUnfolderBase]: For 50775/50775 co-relation queries the response was YES. [2024-11-20 09:44:17,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27176 conditions, 3490 events. 2275/3490 cut-off events. For 50775/50775 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 17948 event pairs, 668 based on Foata normal form. 79/3569 useless extension candidates. Maximal degree in co-relation 27086. Up to 2220 conditions per place. [2024-11-20 09:44:17,566 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 418 selfloop transitions, 61 changer transitions 61/541 dead transitions. [2024-11-20 09:44:17,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 541 transitions, 9235 flow [2024-11-20 09:44:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:44:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:44:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-11-20 09:44:17,567 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-11-20 09:44:17,567 INFO L175 Difference]: Start difference. First operand has 236 places, 486 transitions, 7772 flow. Second operand 10 states and 120 transitions. [2024-11-20 09:44:17,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 541 transitions, 9235 flow [2024-11-20 09:44:17,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 541 transitions, 8965 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-11-20 09:44:17,894 INFO L231 Difference]: Finished difference. Result has 235 places, 426 transitions, 6530 flow [2024-11-20 09:44:17,895 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7211, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6530, PETRI_PLACES=235, PETRI_TRANSITIONS=426} [2024-11-20 09:44:17,895 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 206 predicate places. [2024-11-20 09:44:17,896 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 426 transitions, 6530 flow [2024-11-20 09:44:17,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 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) [2024-11-20 09:44:17,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:17,896 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:17,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-20 09:44:18,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:18,097 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:18,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:18,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1088375026, now seen corresponding path program 4 times [2024-11-20 09:44:18,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:18,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966473995] [2024-11-20 09:44:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:18,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:18,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:18,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966473995] [2024-11-20 09:44:18,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966473995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:18,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992613350] [2024-11-20 09:44:18,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:44:18,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:18,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:18,173 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:18,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-20 09:44:18,235 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:44:18,235 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:18,236 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-20 09:44:18,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:18,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:18,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992613350] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:18,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:18,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-11-20 09:44:18,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998942242] [2024-11-20 09:44:18,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:18,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:44:18,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:18,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:44:18,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:44:18,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:18,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 426 transitions, 6530 flow. Second operand has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 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) [2024-11-20 09:44:18,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:18,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:18,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:19,581 INFO L124 PetriNetUnfolderBase]: 2617/3909 cut-off events. [2024-11-20 09:44:19,582 INFO L125 PetriNetUnfolderBase]: For 57751/57751 co-relation queries the response was YES. [2024-11-20 09:44:19,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30510 conditions, 3909 events. 2617/3909 cut-off events. For 57751/57751 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 19815 event pairs, 250 based on Foata normal form. 79/3988 useless extension candidates. Maximal degree in co-relation 30422. Up to 1101 conditions per place. [2024-11-20 09:44:19,618 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 409 selfloop transitions, 288 changer transitions 65/763 dead transitions. [2024-11-20 09:44:19,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 763 transitions, 12043 flow [2024-11-20 09:44:19,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-20 09:44:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-11-20 09:44:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 500 transitions. [2024-11-20 09:44:19,619 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3561253561253561 [2024-11-20 09:44:19,619 INFO L175 Difference]: Start difference. First operand has 235 places, 426 transitions, 6530 flow. Second operand 52 states and 500 transitions. [2024-11-20 09:44:19,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 763 transitions, 12043 flow [2024-11-20 09:44:19,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 763 transitions, 11653 flow, removed 93 selfloop flow, removed 11 redundant places. [2024-11-20 09:44:19,982 INFO L231 Difference]: Finished difference. Result has 291 places, 539 transitions, 8864 flow [2024-11-20 09:44:19,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6278, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=8864, PETRI_PLACES=291, PETRI_TRANSITIONS=539} [2024-11-20 09:44:19,983 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 262 predicate places. [2024-11-20 09:44:19,983 INFO L471 AbstractCegarLoop]: Abstraction has has 291 places, 539 transitions, 8864 flow [2024-11-20 09:44:19,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.5) internal successors, (117), 18 states have internal predecessors, (117), 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) [2024-11-20 09:44:19,983 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:19,983 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:19,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:20,184 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:20,184 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:20,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:20,184 INFO L85 PathProgramCache]: Analyzing trace with hash -510134992, now seen corresponding path program 5 times [2024-11-20 09:44:20,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:20,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908822979] [2024-11-20 09:44:20,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:20,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:20,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:20,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908822979] [2024-11-20 09:44:20,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908822979] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:20,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847430134] [2024-11-20 09:44:20,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:44:20,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:20,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:20,256 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:20,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-20 09:44:20,315 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:44:20,315 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:20,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:44:20,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:20,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:20,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847430134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:20,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:20,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-20 09:44:20,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199049504] [2024-11-20 09:44:20,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:20,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 09:44:20,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:20,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 09:44:20,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-11-20 09:44:20,422 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:20,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 539 transitions, 8864 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 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) [2024-11-20 09:44:20,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:20,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:20,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:21,051 INFO L124 PetriNetUnfolderBase]: 2323/3457 cut-off events. [2024-11-20 09:44:21,051 INFO L125 PetriNetUnfolderBase]: For 64215/64215 co-relation queries the response was YES. [2024-11-20 09:44:21,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30074 conditions, 3457 events. 2323/3457 cut-off events. For 64215/64215 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 16877 event pairs, 659 based on Foata normal form. 98/3555 useless extension candidates. Maximal degree in co-relation 29967. Up to 2748 conditions per place. [2024-11-20 09:44:21,085 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 478 selfloop transitions, 55 changer transitions 30/564 dead transitions. [2024-11-20 09:44:21,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 564 transitions, 10114 flow [2024-11-20 09:44:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:44:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:44:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 107 transitions. [2024-11-20 09:44:21,086 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4403292181069959 [2024-11-20 09:44:21,086 INFO L175 Difference]: Start difference. First operand has 291 places, 539 transitions, 8864 flow. Second operand 9 states and 107 transitions. [2024-11-20 09:44:21,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 564 transitions, 10114 flow [2024-11-20 09:44:21,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 564 transitions, 9058 flow, removed 346 selfloop flow, removed 24 redundant places. [2024-11-20 09:44:21,483 INFO L231 Difference]: Finished difference. Result has 266 places, 510 transitions, 7492 flow [2024-11-20 09:44:21,483 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7631, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7492, PETRI_PLACES=266, PETRI_TRANSITIONS=510} [2024-11-20 09:44:21,483 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 237 predicate places. [2024-11-20 09:44:21,484 INFO L471 AbstractCegarLoop]: Abstraction has has 266 places, 510 transitions, 7492 flow [2024-11-20 09:44:21,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 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) [2024-11-20 09:44:21,484 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:21,484 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:21,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:21,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:21,685 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:21,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash 948173126, now seen corresponding path program 6 times [2024-11-20 09:44:21,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:21,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340728640] [2024-11-20 09:44:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:21,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:21,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:21,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340728640] [2024-11-20 09:44:21,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340728640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:21,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225763250] [2024-11-20 09:44:21,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:44:21,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:21,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:21,751 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:21,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-20 09:44:21,806 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-20 09:44:21,806 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:21,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:44:21,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:21,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:21,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225763250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:21,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:21,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-20 09:44:21,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893438806] [2024-11-20 09:44:21,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:21,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:44:21,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:21,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:44:21,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:44:21,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:21,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 510 transitions, 7492 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 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) [2024-11-20 09:44:21,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:21,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:21,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:22,490 INFO L124 PetriNetUnfolderBase]: 2075/3054 cut-off events. [2024-11-20 09:44:22,490 INFO L125 PetriNetUnfolderBase]: For 51022/51022 co-relation queries the response was YES. [2024-11-20 09:44:22,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25668 conditions, 3054 events. 2075/3054 cut-off events. For 51022/51022 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 14151 event pairs, 626 based on Foata normal form. 79/3133 useless extension candidates. Maximal degree in co-relation 25571. Up to 2748 conditions per place. [2024-11-20 09:44:22,522 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 384 selfloop transitions, 3 changer transitions 82/470 dead transitions. [2024-11-20 09:44:22,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 470 transitions, 7735 flow [2024-11-20 09:44:22,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 09:44:22,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 09:44:22,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-11-20 09:44:22,523 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3991769547325103 [2024-11-20 09:44:22,523 INFO L175 Difference]: Start difference. First operand has 266 places, 510 transitions, 7492 flow. Second operand 9 states and 97 transitions. [2024-11-20 09:44:22,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 470 transitions, 7735 flow [2024-11-20 09:44:22,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 470 transitions, 7532 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-11-20 09:44:22,782 INFO L231 Difference]: Finished difference. Result has 257 places, 388 transitions, 5662 flow [2024-11-20 09:44:22,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5662, PETRI_PLACES=257, PETRI_TRANSITIONS=388} [2024-11-20 09:44:22,783 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 228 predicate places. [2024-11-20 09:44:22,783 INFO L471 AbstractCegarLoop]: Abstraction has has 257 places, 388 transitions, 5662 flow [2024-11-20 09:44:22,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 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) [2024-11-20 09:44:22,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:22,783 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:22,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:22,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:22,984 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:22,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:22,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1419626082, now seen corresponding path program 10 times [2024-11-20 09:44:22,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:22,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946940325] [2024-11-20 09:44:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:22,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:23,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:23,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946940325] [2024-11-20 09:44:23,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946940325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:23,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689283140] [2024-11-20 09:44:23,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:44:23,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:23,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:23,072 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:23,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-20 09:44:23,124 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:44:23,124 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:23,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:44:23,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:23,199 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:23,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689283140] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:23,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:23,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-20 09:44:23,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394905157] [2024-11-20 09:44:23,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:23,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:44:23,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:23,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:44:23,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:44:23,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:23,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 388 transitions, 5662 flow. Second operand has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 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) [2024-11-20 09:44:23,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:23,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:23,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:24,078 INFO L124 PetriNetUnfolderBase]: 1948/2771 cut-off events. [2024-11-20 09:44:24,078 INFO L125 PetriNetUnfolderBase]: For 43372/43372 co-relation queries the response was YES. [2024-11-20 09:44:24,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23320 conditions, 2771 events. 1948/2771 cut-off events. For 43372/43372 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 11873 event pairs, 154 based on Foata normal form. 28/2799 useless extension candidates. Maximal degree in co-relation 23225. Up to 986 conditions per place. [2024-11-20 09:44:24,111 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 281 selfloop transitions, 219 changer transitions 0/501 dead transitions. [2024-11-20 09:44:24,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 501 transitions, 7949 flow [2024-11-20 09:44:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 09:44:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 09:44:24,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 209 transitions. [2024-11-20 09:44:24,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.387037037037037 [2024-11-20 09:44:24,112 INFO L175 Difference]: Start difference. First operand has 257 places, 388 transitions, 5662 flow. Second operand 20 states and 209 transitions. [2024-11-20 09:44:24,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 501 transitions, 7949 flow [2024-11-20 09:44:24,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 501 transitions, 7508 flow, removed 157 selfloop flow, removed 24 redundant places. [2024-11-20 09:44:24,339 INFO L231 Difference]: Finished difference. Result has 207 places, 404 transitions, 6117 flow [2024-11-20 09:44:24,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6117, PETRI_PLACES=207, PETRI_TRANSITIONS=404} [2024-11-20 09:44:24,339 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2024-11-20 09:44:24,339 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 404 transitions, 6117 flow [2024-11-20 09:44:24,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 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) [2024-11-20 09:44:24,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:24,339 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:24,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:24,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-20 09:44:24,540 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:24,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:24,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1282815831, now seen corresponding path program 8 times [2024-11-20 09:44:24,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:24,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226755884] [2024-11-20 09:44:24,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:24,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:24,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:24,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226755884] [2024-11-20 09:44:24,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226755884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:24,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962211201] [2024-11-20 09:44:24,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:44:24,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:24,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:24,633 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:24,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-20 09:44:24,691 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:44:24,691 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:24,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:44:24,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:24,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:24,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962211201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:24,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:24,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-20 09:44:24,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686087411] [2024-11-20 09:44:24,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:24,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:44:24,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:24,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:44:24,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:44:24,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:24,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 404 transitions, 6117 flow. Second operand has 20 states, 20 states have (on average 6.15) internal successors, (123), 20 states have internal predecessors, (123), 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) [2024-11-20 09:44:24,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:24,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:24,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:25,430 INFO L124 PetriNetUnfolderBase]: 2534/3602 cut-off events. [2024-11-20 09:44:25,430 INFO L125 PetriNetUnfolderBase]: For 52426/52426 co-relation queries the response was YES. [2024-11-20 09:44:25,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29620 conditions, 3602 events. 2534/3602 cut-off events. For 52426/52426 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 16310 event pairs, 323 based on Foata normal form. 54/3656 useless extension candidates. Maximal degree in co-relation 29541. Up to 1962 conditions per place. [2024-11-20 09:44:25,463 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 444 selfloop transitions, 253 changer transitions 0/698 dead transitions. [2024-11-20 09:44:25,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 698 transitions, 11277 flow [2024-11-20 09:44:25,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 09:44:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 09:44:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 167 transitions. [2024-11-20 09:44:25,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4123456790123457 [2024-11-20 09:44:25,464 INFO L175 Difference]: Start difference. First operand has 207 places, 404 transitions, 6117 flow. Second operand 15 states and 167 transitions. [2024-11-20 09:44:25,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 698 transitions, 11277 flow [2024-11-20 09:44:25,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 698 transitions, 10850 flow, removed 114 selfloop flow, removed 9 redundant places. [2024-11-20 09:44:25,719 INFO L231 Difference]: Finished difference. Result has 217 places, 499 transitions, 7917 flow [2024-11-20 09:44:25,720 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5811, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7917, PETRI_PLACES=217, PETRI_TRANSITIONS=499} [2024-11-20 09:44:25,720 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 188 predicate places. [2024-11-20 09:44:25,720 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 499 transitions, 7917 flow [2024-11-20 09:44:25,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.15) internal successors, (123), 20 states have internal predecessors, (123), 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) [2024-11-20 09:44:25,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:25,720 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:25,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:25,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:25,921 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:25,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:25,921 INFO L85 PathProgramCache]: Analyzing trace with hash -731354923, now seen corresponding path program 9 times [2024-11-20 09:44:25,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:25,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618947492] [2024-11-20 09:44:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:25,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:25,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:25,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618947492] [2024-11-20 09:44:25,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618947492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:25,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337577187] [2024-11-20 09:44:25,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:44:25,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:25,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:25,984 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:25,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-20 09:44:26,043 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-20 09:44:26,043 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:26,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:44:26,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:26,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:26,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337577187] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:26,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:26,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-20 09:44:26,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246937144] [2024-11-20 09:44:26,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:26,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 09:44:26,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 09:44:26,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-20 09:44:26,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:26,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 499 transitions, 7917 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 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) [2024-11-20 09:44:26,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:26,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:26,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:26,781 INFO L124 PetriNetUnfolderBase]: 2639/3795 cut-off events. [2024-11-20 09:44:26,782 INFO L125 PetriNetUnfolderBase]: For 63336/63336 co-relation queries the response was YES. [2024-11-20 09:44:26,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32887 conditions, 3795 events. 2639/3795 cut-off events. For 63336/63336 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 17673 event pairs, 217 based on Foata normal form. 30/3825 useless extension candidates. Maximal degree in co-relation 32805. Up to 1295 conditions per place. [2024-11-20 09:44:26,820 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 451 selfloop transitions, 207 changer transitions 0/659 dead transitions. [2024-11-20 09:44:26,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 659 transitions, 11422 flow [2024-11-20 09:44:26,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:44:26,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:44:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-11-20 09:44:26,822 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-11-20 09:44:26,822 INFO L175 Difference]: Start difference. First operand has 217 places, 499 transitions, 7917 flow. Second operand 10 states and 109 transitions. [2024-11-20 09:44:26,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 659 transitions, 11422 flow [2024-11-20 09:44:27,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 659 transitions, 10958 flow, removed 209 selfloop flow, removed 5 redundant places. [2024-11-20 09:44:27,164 INFO L231 Difference]: Finished difference. Result has 223 places, 512 transitions, 8260 flow [2024-11-20 09:44:27,166 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7453, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8260, PETRI_PLACES=223, PETRI_TRANSITIONS=512} [2024-11-20 09:44:27,166 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 194 predicate places. [2024-11-20 09:44:27,166 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 512 transitions, 8260 flow [2024-11-20 09:44:27,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 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) [2024-11-20 09:44:27,167 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:27,167 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:27,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-20 09:44:27,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:27,367 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:27,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1409569305, now seen corresponding path program 10 times [2024-11-20 09:44:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:27,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111474531] [2024-11-20 09:44:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:27,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:27,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:27,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111474531] [2024-11-20 09:44:27,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111474531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:27,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932589090] [2024-11-20 09:44:27,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:44:27,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:27,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:27,451 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:27,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-20 09:44:27,504 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:44:27,505 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:27,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:44:27,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:27,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:27,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932589090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:27,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:27,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-20 09:44:27,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649949131] [2024-11-20 09:44:27,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:27,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 09:44:27,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 09:44:27,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-11-20 09:44:27,616 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:27,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 512 transitions, 8260 flow. Second operand has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 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) [2024-11-20 09:44:27,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:27,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:27,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:28,425 INFO L124 PetriNetUnfolderBase]: 2676/3857 cut-off events. [2024-11-20 09:44:28,425 INFO L125 PetriNetUnfolderBase]: For 64084/64084 co-relation queries the response was YES. [2024-11-20 09:44:28,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33003 conditions, 3857 events. 2676/3857 cut-off events. For 64084/64084 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 17993 event pairs, 161 based on Foata normal form. 25/3882 useless extension candidates. Maximal degree in co-relation 32919. Up to 1207 conditions per place. [2024-11-20 09:44:28,472 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 378 selfloop transitions, 305 changer transitions 0/684 dead transitions. [2024-11-20 09:44:28,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 684 transitions, 11658 flow [2024-11-20 09:44:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 09:44:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 09:44:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 196 transitions. [2024-11-20 09:44:28,473 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.362962962962963 [2024-11-20 09:44:28,473 INFO L175 Difference]: Start difference. First operand has 223 places, 512 transitions, 8260 flow. Second operand 20 states and 196 transitions. [2024-11-20 09:44:28,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 684 transitions, 11658 flow [2024-11-20 09:44:28,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 684 transitions, 11174 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-11-20 09:44:28,878 INFO L231 Difference]: Finished difference. Result has 238 places, 555 transitions, 9222 flow [2024-11-20 09:44:28,878 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7868, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9222, PETRI_PLACES=238, PETRI_TRANSITIONS=555} [2024-11-20 09:44:28,879 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 209 predicate places. [2024-11-20 09:44:28,879 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 555 transitions, 9222 flow [2024-11-20 09:44:28,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.352941176470588) internal successors, (108), 17 states have internal predecessors, (108), 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) [2024-11-20 09:44:28,879 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:28,879 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:28,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-20 09:44:29,080 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-20 09:44:29,080 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:29,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:29,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1458763499, now seen corresponding path program 11 times [2024-11-20 09:44:29,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:29,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439709072] [2024-11-20 09:44:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:29,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:29,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:29,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439709072] [2024-11-20 09:44:29,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439709072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:29,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303570682] [2024-11-20 09:44:29,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:44:29,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:29,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:29,184 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:29,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-20 09:44:29,250 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:44:29,250 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:29,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:44:29,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:29,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:29,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303570682] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:29,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:29,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-20 09:44:29,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789484757] [2024-11-20 09:44:29,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:29,381 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-20 09:44:29,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:29,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-20 09:44:29,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-11-20 09:44:29,382 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:29,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 555 transitions, 9222 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:29,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:29,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:29,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:30,527 INFO L124 PetriNetUnfolderBase]: 2854/4158 cut-off events. [2024-11-20 09:44:30,527 INFO L125 PetriNetUnfolderBase]: For 75376/75376 co-relation queries the response was YES. [2024-11-20 09:44:30,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36689 conditions, 4158 events. 2854/4158 cut-off events. For 75376/75376 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 20100 event pairs, 167 based on Foata normal form. 52/4210 useless extension candidates. Maximal degree in co-relation 36602. Up to 1207 conditions per place. [2024-11-20 09:44:30,574 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 404 selfloop transitions, 457 changer transitions 0/862 dead transitions. [2024-11-20 09:44:30,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 862 transitions, 14900 flow [2024-11-20 09:44:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-20 09:44:30,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-20 09:44:30,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 374 transitions. [2024-11-20 09:44:30,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3645224171539961 [2024-11-20 09:44:30,576 INFO L175 Difference]: Start difference. First operand has 238 places, 555 transitions, 9222 flow. Second operand 38 states and 374 transitions. [2024-11-20 09:44:30,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 862 transitions, 14900 flow [2024-11-20 09:44:30,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 862 transitions, 14632 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-11-20 09:44:30,975 INFO L231 Difference]: Finished difference. Result has 279 places, 678 transitions, 12412 flow [2024-11-20 09:44:30,975 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=9006, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=12412, PETRI_PLACES=279, PETRI_TRANSITIONS=678} [2024-11-20 09:44:30,975 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 250 predicate places. [2024-11-20 09:44:30,975 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 678 transitions, 12412 flow [2024-11-20 09:44:30,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:30,976 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:30,976 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:30,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:31,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-20 09:44:31,176 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:31,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash 851042482, now seen corresponding path program 11 times [2024-11-20 09:44:31,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:31,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478872382] [2024-11-20 09:44:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:31,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:31,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478872382] [2024-11-20 09:44:31,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478872382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:31,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16299423] [2024-11-20 09:44:31,265 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:44:31,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:31,266 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:31,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-20 09:44:31,327 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:44:31,327 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:31,328 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:44:31,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:31,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:31,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:31,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16299423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:31,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:31,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-20 09:44:31,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702830827] [2024-11-20 09:44:31,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:31,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:44:31,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:31,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:44:31,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:44:31,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:31,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 678 transitions, 12412 flow. Second operand has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 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) [2024-11-20 09:44:31,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:31,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:31,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:33,134 INFO L124 PetriNetUnfolderBase]: 4029/5807 cut-off events. [2024-11-20 09:44:33,135 INFO L125 PetriNetUnfolderBase]: For 138056/138056 co-relation queries the response was YES. [2024-11-20 09:44:33,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56724 conditions, 5807 events. 4029/5807 cut-off events. For 138056/138056 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 29031 event pairs, 143 based on Foata normal form. 59/5866 useless extension candidates. Maximal degree in co-relation 56626. Up to 1885 conditions per place. [2024-11-20 09:44:33,196 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 482 selfloop transitions, 619 changer transitions 0/1102 dead transitions. [2024-11-20 09:44:33,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1102 transitions, 20904 flow [2024-11-20 09:44:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-20 09:44:33,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-20 09:44:33,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 457 transitions. [2024-11-20 09:44:33,197 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3846801346801347 [2024-11-20 09:44:33,197 INFO L175 Difference]: Start difference. First operand has 279 places, 678 transitions, 12412 flow. Second operand 44 states and 457 transitions. [2024-11-20 09:44:33,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1102 transitions, 20904 flow [2024-11-20 09:44:34,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 1102 transitions, 19639 flow, removed 463 selfloop flow, removed 10 redundant places. [2024-11-20 09:44:34,141 INFO L231 Difference]: Finished difference. Result has 325 places, 845 transitions, 16041 flow [2024-11-20 09:44:34,142 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11114, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16041, PETRI_PLACES=325, PETRI_TRANSITIONS=845} [2024-11-20 09:44:34,142 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 296 predicate places. [2024-11-20 09:44:34,142 INFO L471 AbstractCegarLoop]: Abstraction has has 325 places, 845 transitions, 16041 flow [2024-11-20 09:44:34,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.1) internal successors, (122), 20 states have internal predecessors, (122), 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) [2024-11-20 09:44:34,142 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:34,142 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:34,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:34,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-20 09:44:34,343 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:34,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:34,343 INFO L85 PathProgramCache]: Analyzing trace with hash 675261373, now seen corresponding path program 12 times [2024-11-20 09:44:34,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:34,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235083683] [2024-11-20 09:44:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:34,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:34,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:34,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235083683] [2024-11-20 09:44:34,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235083683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:34,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834815574] [2024-11-20 09:44:34,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:44:34,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:34,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:34,435 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:34,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-20 09:44:34,504 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 09:44:34,505 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:34,505 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:44:34,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:34,589 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:34,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834815574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:34,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:34,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-20 09:44:34,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049725146] [2024-11-20 09:44:34,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:34,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:44:34,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:34,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:44:34,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:44:34,676 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:34,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 845 transitions, 16041 flow. Second operand has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 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) [2024-11-20 09:44:34,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:34,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:34,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:35,947 INFO L124 PetriNetUnfolderBase]: 3992/5741 cut-off events. [2024-11-20 09:44:35,947 INFO L125 PetriNetUnfolderBase]: For 136434/136434 co-relation queries the response was YES. [2024-11-20 09:44:35,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57368 conditions, 5741 events. 3992/5741 cut-off events. For 136434/136434 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 28344 event pairs, 859 based on Foata normal form. 25/5766 useless extension candidates. Maximal degree in co-relation 57257. Up to 4017 conditions per place. [2024-11-20 09:44:36,012 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 661 selfloop transitions, 257 changer transitions 0/919 dead transitions. [2024-11-20 09:44:36,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 919 transitions, 18560 flow [2024-11-20 09:44:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 09:44:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 09:44:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 133 transitions. [2024-11-20 09:44:36,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3789173789173789 [2024-11-20 09:44:36,014 INFO L175 Difference]: Start difference. First operand has 325 places, 845 transitions, 16041 flow. Second operand 13 states and 133 transitions. [2024-11-20 09:44:36,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 919 transitions, 18560 flow [2024-11-20 09:44:37,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 919 transitions, 16600 flow, removed 595 selfloop flow, removed 17 redundant places. [2024-11-20 09:44:37,119 INFO L231 Difference]: Finished difference. Result has 320 places, 837 transitions, 14469 flow [2024-11-20 09:44:37,120 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13955, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14469, PETRI_PLACES=320, PETRI_TRANSITIONS=837} [2024-11-20 09:44:37,120 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 291 predicate places. [2024-11-20 09:44:37,120 INFO L471 AbstractCegarLoop]: Abstraction has has 320 places, 837 transitions, 14469 flow [2024-11-20 09:44:37,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.809523809523809) internal successors, (122), 21 states have internal predecessors, (122), 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) [2024-11-20 09:44:37,121 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:37,121 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:37,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:37,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-20 09:44:37,321 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:37,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:37,322 INFO L85 PathProgramCache]: Analyzing trace with hash -354849624, now seen corresponding path program 12 times [2024-11-20 09:44:37,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:37,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060720875] [2024-11-20 09:44:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:37,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:37,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:37,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060720875] [2024-11-20 09:44:37,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060720875] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:37,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683788428] [2024-11-20 09:44:37,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:44:37,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:37,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:37,402 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:37,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-20 09:44:37,470 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 09:44:37,470 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:37,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:44:37,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:37,527 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:37,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683788428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:37,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:37,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-20 09:44:37,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178753449] [2024-11-20 09:44:37,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:37,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:44:37,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:37,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:44:37,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:44:37,600 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:37,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 837 transitions, 14469 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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) [2024-11-20 09:44:37,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:37,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:37,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:38,851 INFO L124 PetriNetUnfolderBase]: 4079/5891 cut-off events. [2024-11-20 09:44:38,851 INFO L125 PetriNetUnfolderBase]: For 103052/103052 co-relation queries the response was YES. [2024-11-20 09:44:38,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51215 conditions, 5891 events. 4079/5891 cut-off events. For 103052/103052 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 29336 event pairs, 559 based on Foata normal form. 17/5908 useless extension candidates. Maximal degree in co-relation 51104. Up to 2379 conditions per place. [2024-11-20 09:44:38,915 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 611 selfloop transitions, 308 changer transitions 0/920 dead transitions. [2024-11-20 09:44:38,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 920 transitions, 17250 flow [2024-11-20 09:44:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 09:44:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 09:44:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-11-20 09:44:38,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2024-11-20 09:44:38,916 INFO L175 Difference]: Start difference. First operand has 320 places, 837 transitions, 14469 flow. Second operand 10 states and 104 transitions. [2024-11-20 09:44:38,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 920 transitions, 17250 flow [2024-11-20 09:44:39,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 920 transitions, 16633 flow, removed 26 selfloop flow, removed 17 redundant places. [2024-11-20 09:44:39,674 INFO L231 Difference]: Finished difference. Result has 313 places, 832 transitions, 14412 flow [2024-11-20 09:44:39,675 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13760, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=832, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14412, PETRI_PLACES=313, PETRI_TRANSITIONS=832} [2024-11-20 09:44:39,676 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 284 predicate places. [2024-11-20 09:44:39,676 INFO L471 AbstractCegarLoop]: Abstraction has has 313 places, 832 transitions, 14412 flow [2024-11-20 09:44:39,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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) [2024-11-20 09:44:39,676 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:39,676 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:39,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:39,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:39,877 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:39,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:39,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2058141848, now seen corresponding path program 13 times [2024-11-20 09:44:39,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:39,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293713909] [2024-11-20 09:44:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:39,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:39,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:39,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293713909] [2024-11-20 09:44:39,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293713909] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:39,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145964134] [2024-11-20 09:44:39,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:44:39,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:39,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:39,966 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:39,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-20 09:44:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:40,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:44:40,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:40,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:40,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145964134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:40,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:40,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-20 09:44:40,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345651022] [2024-11-20 09:44:40,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:40,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 09:44:40,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:40,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 09:44:40,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2024-11-20 09:44:40,200 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:40,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 832 transitions, 14412 flow. Second operand has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 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) [2024-11-20 09:44:40,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:40,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:40,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:41,500 INFO L124 PetriNetUnfolderBase]: 4053/5844 cut-off events. [2024-11-20 09:44:41,501 INFO L125 PetriNetUnfolderBase]: For 103902/103902 co-relation queries the response was YES. [2024-11-20 09:44:41,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51368 conditions, 5844 events. 4053/5844 cut-off events. For 103902/103902 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 29037 event pairs, 436 based on Foata normal form. 18/5862 useless extension candidates. Maximal degree in co-relation 51262. Up to 1847 conditions per place. [2024-11-20 09:44:41,554 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 574 selfloop transitions, 408 changer transitions 0/983 dead transitions. [2024-11-20 09:44:41,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 983 transitions, 18078 flow [2024-11-20 09:44:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 09:44:41,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-20 09:44:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 204 transitions. [2024-11-20 09:44:41,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-11-20 09:44:41,555 INFO L175 Difference]: Start difference. First operand has 313 places, 832 transitions, 14412 flow. Second operand 18 states and 204 transitions. [2024-11-20 09:44:41,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 983 transitions, 18078 flow [2024-11-20 09:44:42,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 983 transitions, 17547 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-20 09:44:42,274 INFO L231 Difference]: Finished difference. Result has 319 places, 821 transitions, 14577 flow [2024-11-20 09:44:42,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13761, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=14577, PETRI_PLACES=319, PETRI_TRANSITIONS=821} [2024-11-20 09:44:42,275 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 290 predicate places. [2024-11-20 09:44:42,275 INFO L471 AbstractCegarLoop]: Abstraction has has 319 places, 821 transitions, 14577 flow [2024-11-20 09:44:42,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 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) [2024-11-20 09:44:42,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:42,275 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:42,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-20 09:44:42,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-20 09:44:42,476 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:42,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:42,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1642167738, now seen corresponding path program 14 times [2024-11-20 09:44:42,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:42,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702049696] [2024-11-20 09:44:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:42,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:42,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:42,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702049696] [2024-11-20 09:44:42,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702049696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:42,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891896016] [2024-11-20 09:44:42,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:44:42,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:42,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:42,566 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:42,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-20 09:44:42,635 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:44:42,636 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:42,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:44:42,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:42,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:42,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891896016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:42,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:42,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-20 09:44:42,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991307506] [2024-11-20 09:44:42,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:42,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:44:42,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:42,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:44:42,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:44:42,802 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:42,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 821 transitions, 14577 flow. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 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) [2024-11-20 09:44:42,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:42,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:42,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:44,014 INFO L124 PetriNetUnfolderBase]: 4079/5888 cut-off events. [2024-11-20 09:44:44,015 INFO L125 PetriNetUnfolderBase]: For 104881/104881 co-relation queries the response was YES. [2024-11-20 09:44:44,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52605 conditions, 5888 events. 4079/5888 cut-off events. For 104881/104881 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29277 event pairs, 935 based on Foata normal form. 18/5906 useless extension candidates. Maximal degree in co-relation 52502. Up to 4116 conditions per place. [2024-11-20 09:44:44,078 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 653 selfloop transitions, 249 changer transitions 0/903 dead transitions. [2024-11-20 09:44:44,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 903 transitions, 17308 flow [2024-11-20 09:44:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-20 09:44:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-20 09:44:44,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 124 transitions. [2024-11-20 09:44:44,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38271604938271603 [2024-11-20 09:44:44,079 INFO L175 Difference]: Start difference. First operand has 319 places, 821 transitions, 14577 flow. Second operand 12 states and 124 transitions. [2024-11-20 09:44:44,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 903 transitions, 17308 flow [2024-11-20 09:44:44,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 903 transitions, 16503 flow, removed 0 selfloop flow, removed 16 redundant places. [2024-11-20 09:44:44,999 INFO L231 Difference]: Finished difference. Result has 315 places, 825 transitions, 14377 flow [2024-11-20 09:44:44,999 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13780, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14377, PETRI_PLACES=315, PETRI_TRANSITIONS=825} [2024-11-20 09:44:45,000 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 286 predicate places. [2024-11-20 09:44:45,000 INFO L471 AbstractCegarLoop]: Abstraction has has 315 places, 825 transitions, 14377 flow [2024-11-20 09:44:45,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 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) [2024-11-20 09:44:45,000 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:45,000 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:45,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:45,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-20 09:44:45,201 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:45,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:45,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1906027553, now seen corresponding path program 13 times [2024-11-20 09:44:45,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:45,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946700012] [2024-11-20 09:44:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:45,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:45,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:45,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946700012] [2024-11-20 09:44:45,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946700012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:45,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113601711] [2024-11-20 09:44:45,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:44:45,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:45,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:45,289 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:45,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-20 09:44:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:45,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:44:45,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:45,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:45,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:45,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113601711] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:45,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:45,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-20 09:44:45,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315794549] [2024-11-20 09:44:45,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:45,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:44:45,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:45,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:44:45,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:44:45,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:45,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 825 transitions, 14377 flow. Second operand has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 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) [2024-11-20 09:44:45,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:45,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:45,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:46,743 INFO L124 PetriNetUnfolderBase]: 3980/5710 cut-off events. [2024-11-20 09:44:46,744 INFO L125 PetriNetUnfolderBase]: For 103311/103311 co-relation queries the response was YES. [2024-11-20 09:44:46,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50619 conditions, 5710 events. 3980/5710 cut-off events. For 103311/103311 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28215 event pairs, 637 based on Foata normal form. 67/5777 useless extension candidates. Maximal degree in co-relation 50515. Up to 3545 conditions per place. [2024-11-20 09:44:46,807 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 663 selfloop transitions, 360 changer transitions 0/1024 dead transitions. [2024-11-20 09:44:46,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1024 transitions, 18804 flow [2024-11-20 09:44:46,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 09:44:46,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 09:44:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 162 transitions. [2024-11-20 09:44:46,808 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-20 09:44:46,808 INFO L175 Difference]: Start difference. First operand has 315 places, 825 transitions, 14377 flow. Second operand 15 states and 162 transitions. [2024-11-20 09:44:46,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1024 transitions, 18804 flow [2024-11-20 09:44:47,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1024 transitions, 18292 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-11-20 09:44:47,610 INFO L231 Difference]: Finished difference. Result has 319 places, 832 transitions, 14653 flow [2024-11-20 09:44:47,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13801, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=14653, PETRI_PLACES=319, PETRI_TRANSITIONS=832} [2024-11-20 09:44:47,611 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 290 predicate places. [2024-11-20 09:44:47,611 INFO L471 AbstractCegarLoop]: Abstraction has has 319 places, 832 transitions, 14653 flow [2024-11-20 09:44:47,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 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) [2024-11-20 09:44:47,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:47,612 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:47,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-20 09:44:47,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-20 09:44:47,812 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:47,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash 449616526, now seen corresponding path program 15 times [2024-11-20 09:44:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:47,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083583513] [2024-11-20 09:44:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:47,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:47,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:47,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083583513] [2024-11-20 09:44:47,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083583513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:47,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623593554] [2024-11-20 09:44:47,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:44:47,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:47,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:47,904 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:47,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-20 09:44:47,973 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:44:47,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:47,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 09:44:47,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:48,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 09:44:48,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623593554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:48,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:48,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-20 09:44:48,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579495058] [2024-11-20 09:44:48,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:48,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:44:48,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:48,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:44:48,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:44:48,134 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-20 09:44:48,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 832 transitions, 14653 flow. Second operand has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 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) [2024-11-20 09:44:48,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:48,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-20 09:44:48,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:49,237 INFO L124 PetriNetUnfolderBase]: 3954/5663 cut-off events. [2024-11-20 09:44:49,237 INFO L125 PetriNetUnfolderBase]: For 104291/104291 co-relation queries the response was YES. [2024-11-20 09:44:49,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50913 conditions, 5663 events. 3954/5663 cut-off events. For 104291/104291 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 27541 event pairs, 1040 based on Foata normal form. 18/5681 useless extension candidates. Maximal degree in co-relation 50809. Up to 4739 conditions per place. [2024-11-20 09:44:49,327 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 674 selfloop transitions, 206 changer transitions 0/881 dead transitions. [2024-11-20 09:44:49,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 881 transitions, 16988 flow [2024-11-20 09:44:49,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 09:44:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 09:44:49,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-11-20 09:44:49,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-11-20 09:44:49,328 INFO L175 Difference]: Start difference. First operand has 319 places, 832 transitions, 14653 flow. Second operand 11 states and 110 transitions. [2024-11-20 09:44:49,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 881 transitions, 16988 flow [2024-11-20 09:44:50,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 881 transitions, 16449 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-11-20 09:44:50,111 INFO L231 Difference]: Finished difference. Result has 319 places, 832 transitions, 14556 flow [2024-11-20 09:44:50,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=14037, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=622, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14556, PETRI_PLACES=319, PETRI_TRANSITIONS=832} [2024-11-20 09:44:50,113 INFO L277 CegarLoopForPetriNet]: 29 programPoint places, 290 predicate places. [2024-11-20 09:44:50,113 INFO L471 AbstractCegarLoop]: Abstraction has has 319 places, 832 transitions, 14556 flow [2024-11-20 09:44:50,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 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) [2024-11-20 09:44:50,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:50,114 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:50,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-20 09:44:50,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:50,314 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-20 09:44:50,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:50,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1281299081, now seen corresponding path program 7 times [2024-11-20 09:44:50,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:50,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922231384] [2024-11-20 09:44:50,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:50,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:50,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:50,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922231384] [2024-11-20 09:44:50,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922231384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:50,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940023608] [2024-11-20 09:44:50,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:44:50,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:50,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:50,753 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:44:50,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-20 09:44:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:50,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 09:44:50,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:51,131 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-11-20 09:44:51,131 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 34 treesize of output 20 [2024-11-20 09:44:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:51,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:51,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 09:44:51,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 59