./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/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d 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/array-eq-symm.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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 07:04:51,394 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 07:04:51,439 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 07:04:51,442 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 07:04:51,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 07:04:51,461 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 07:04:51,461 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 07:04:51,462 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 07:04:51,462 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 07:04:51,471 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 07:04:51,471 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 07:04:51,472 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 07:04:51,472 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 07:04:51,473 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 07:04:51,473 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 07:04:51,474 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 07:04:51,474 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 07:04:51,474 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 07:04:51,475 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 07:04:51,475 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 07:04:51,475 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 07:04:51,476 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 07:04:51,476 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 07:04:51,476 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 07:04:51,477 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 07:04:51,477 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 07:04:51,477 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 07:04:51,477 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 07:04:51,478 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 07:04:51,478 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 07:04:51,478 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 07:04:51,478 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 07:04:51,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:04:51,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 07:04:51,479 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 07:04:51,479 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 07:04:51,479 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 07:04:51,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 07:04:51,480 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 07:04:51,480 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 07:04:51,480 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 07:04:51,480 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 07:04:51,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-10-13 07:04:51,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 07:04:51,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 07:04:51,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 07:04:51,720 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 07:04:51,721 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 07:04:51,722 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-13 07:04:53,193 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 07:04:53,343 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 07:04:53,344 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-13 07:04:53,350 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3618bdf5/6dcfef93b11f46a89f1d2eae54cda088/FLAG3e8bcbbf2 [2024-10-13 07:04:53,765 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3618bdf5/6dcfef93b11f46a89f1d2eae54cda088 [2024-10-13 07:04:53,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 07:04:53,774 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 07:04:53,781 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 07:04:53,781 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 07:04:53,785 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 07:04:53,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:04:53" (1/1) ... [2024-10-13 07:04:53,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5498ce48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:53, skipping insertion in model container [2024-10-13 07:04:53,791 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:04:53" (1/1) ... [2024-10-13 07:04:53,834 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 07:04:54,066 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2277,2290] [2024-10-13 07:04:54,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:04:54,087 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 07:04:54,115 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2277,2290] [2024-10-13 07:04:54,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 07:04:54,134 INFO L204 MainTranslator]: Completed translation [2024-10-13 07:04:54,134 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54 WrapperNode [2024-10-13 07:04:54,134 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 07:04:54,135 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 07:04:54,135 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 07:04:54,135 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 07:04:54,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (1/1) ... [2024-10-13 07:04:54,147 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (1/1) ... [2024-10-13 07:04:54,173 INFO L138 Inliner]: procedures = 22, calls = 19, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 105 [2024-10-13 07:04:54,173 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 07:04:54,174 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 07:04:54,174 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 07:04:54,174 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 07:04:54,188 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (1/1) ... [2024-10-13 07:04:54,189 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (1/1) ... [2024-10-13 07:04:54,191 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (1/1) ... [2024-10-13 07:04:54,204 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-13 07:04:54,205 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (1/1) ... [2024-10-13 07:04:54,205 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (1/1) ... [2024-10-13 07:04:54,209 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (1/1) ... [2024-10-13 07:04:54,212 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (1/1) ... [2024-10-13 07:04:54,213 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (1/1) ... [2024-10-13 07:04:54,214 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (1/1) ... [2024-10-13 07:04:54,217 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 07:04:54,218 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 07:04:54,218 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 07:04:54,218 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 07:04:54,219 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (1/1) ... [2024-10-13 07:04:54,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 07:04:54,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:04:54,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 07:04:54,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 07:04:54,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 07:04:54,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-13 07:04:54,303 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-13 07:04:54,303 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-13 07:04:54,304 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-13 07:04:54,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 07:04:54,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 07:04:54,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 07:04:54,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 07:04:54,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-13 07:04:54,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 07:04:54,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 07:04:54,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 07:04:54,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 07:04:54,306 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 07:04:54,385 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 07:04:54,387 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 07:04:54,630 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 07:04:54,632 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 07:04:54,947 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 07:04:54,948 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-13 07:04:54,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:04:54 BoogieIcfgContainer [2024-10-13 07:04:54,948 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 07:04:54,950 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 07:04:54,950 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 07:04:54,953 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 07:04:54,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:04:53" (1/3) ... [2024-10-13 07:04:54,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57212295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:04:54, skipping insertion in model container [2024-10-13 07:04:54,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:04:54" (2/3) ... [2024-10-13 07:04:54,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57212295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:04:54, skipping insertion in model container [2024-10-13 07:04:54,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:04:54" (3/3) ... [2024-10-13 07:04:54,955 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-10-13 07:04:54,969 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 07:04:54,969 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 07:04:54,969 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 07:04:55,019 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-13 07:04:55,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 28 transitions, 70 flow [2024-10-13 07:04:55,091 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-10-13 07:04:55,094 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:04:55,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 6/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-10-13 07:04:55,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 28 transitions, 70 flow [2024-10-13 07:04:55,100 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 25 transitions, 62 flow [2024-10-13 07:04:55,113 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 07:04:55,120 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;@59af7a62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 07:04:55,120 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 07:04:55,129 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 07:04:55,130 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2024-10-13 07:04:55,130 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 07:04:55,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:04:55,131 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:04:55,133 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:04:55,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:04:55,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1113111192, now seen corresponding path program 1 times [2024-10-13 07:04:55,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:04:55,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058478548] [2024-10-13 07:04:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:55,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:04:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:04:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:04:55,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:04:55,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058478548] [2024-10-13 07:04:55,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058478548] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:04:55,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:04:55,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 07:04:55,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148846278] [2024-10-13 07:04:55,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:04:55,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 07:04:55,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:04:55,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 07:04:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 07:04:55,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:04:55,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:55,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:04:55,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:04:55,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:04:55,720 INFO L124 PetriNetUnfolderBase]: 207/323 cut-off events. [2024-10-13 07:04:55,721 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-13 07:04:55,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 323 events. 207/323 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1131 event pairs, 42 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 596. Up to 208 conditions per place. [2024-10-13 07:04:55,736 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 33 selfloop transitions, 3 changer transitions 1/40 dead transitions. [2024-10-13 07:04:55,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 40 transitions, 175 flow [2024-10-13 07:04:55,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 07:04:55,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 07:04:55,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-10-13 07:04:55,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-10-13 07:04:55,782 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 62 flow. Second operand 3 states and 53 transitions. [2024-10-13 07:04:55,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 40 transitions, 175 flow [2024-10-13 07:04:55,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 40 transitions, 161 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:04:55,788 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 73 flow [2024-10-13 07:04:55,790 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2024-10-13 07:04:55,794 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2024-10-13 07:04:55,795 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 73 flow [2024-10-13 07:04:55,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:55,795 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:04:55,795 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:04:55,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 07:04:55,796 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:04:55,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:04:55,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1220597756, now seen corresponding path program 1 times [2024-10-13 07:04:55,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:04:55,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584423973] [2024-10-13 07:04:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:55,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:04:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:04:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:04:55,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:04:55,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584423973] [2024-10-13 07:04:55,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584423973] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:04:55,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:04:55,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:04:55,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118689828] [2024-10-13 07:04:55,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:04:55,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:04:55,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:04:55,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:04:55,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:04:55,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:04:55,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:55,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:04:55,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:04:55,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:04:56,069 INFO L124 PetriNetUnfolderBase]: 292/481 cut-off events. [2024-10-13 07:04:56,069 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-10-13 07:04:56,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 481 events. 292/481 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1950 event pairs, 170 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 392. Up to 319 conditions per place. [2024-10-13 07:04:56,074 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 40 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-10-13 07:04:56,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 48 transitions, 216 flow [2024-10-13 07:04:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:04:56,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:04:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2024-10-13 07:04:56,076 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-10-13 07:04:56,076 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 73 flow. Second operand 5 states and 68 transitions. [2024-10-13 07:04:56,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 48 transitions, 216 flow [2024-10-13 07:04:56,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 48 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 07:04:56,077 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 106 flow [2024-10-13 07:04:56,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2024-10-13 07:04:56,078 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2024-10-13 07:04:56,079 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 106 flow [2024-10-13 07:04:56,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:56,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:04:56,079 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:04:56,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 07:04:56,080 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:04:56,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:04:56,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1689689306, now seen corresponding path program 1 times [2024-10-13 07:04:56,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:04:56,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311063157] [2024-10-13 07:04:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:56,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:04:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:04:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:04:56,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:04:56,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311063157] [2024-10-13 07:04:56,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311063157] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:04:56,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:04:56,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 07:04:56,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69726530] [2024-10-13 07:04:56,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:04:56,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 07:04:56,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:04:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 07:04:56,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 07:04:56,177 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:04:56,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:56,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:04:56,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:04:56,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:04:56,298 INFO L124 PetriNetUnfolderBase]: 231/382 cut-off events. [2024-10-13 07:04:56,299 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-10-13 07:04:56,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 382 events. 231/382 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1410 event pairs, 130 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 725. Up to 319 conditions per place. [2024-10-13 07:04:56,302 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 23 selfloop transitions, 2 changer transitions 15/43 dead transitions. [2024-10-13 07:04:56,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 218 flow [2024-10-13 07:04:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:04:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:04:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-10-13 07:04:56,304 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-10-13 07:04:56,305 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 106 flow. Second operand 5 states and 64 transitions. [2024-10-13 07:04:56,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 218 flow [2024-10-13 07:04:56,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 43 transitions, 212 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-13 07:04:56,307 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 90 flow [2024-10-13 07:04:56,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-10-13 07:04:56,309 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2024-10-13 07:04:56,310 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 90 flow [2024-10-13 07:04:56,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:56,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:04:56,310 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] [2024-10-13 07:04:56,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 07:04:56,310 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:04:56,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:04:56,311 INFO L85 PathProgramCache]: Analyzing trace with hash 140296278, now seen corresponding path program 1 times [2024-10-13 07:04:56,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:04:56,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15340615] [2024-10-13 07:04:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:56,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:04:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:04:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:04:56,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:04:56,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15340615] [2024-10-13 07:04:56,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15340615] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:04:56,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:04:56,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:04:56,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208931133] [2024-10-13 07:04:56,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:04:56,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:04:56,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:04:56,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:04:56,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:04:56,417 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:04:56,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:56,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:04:56,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:04:56,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:04:56,532 INFO L124 PetriNetUnfolderBase]: 337/556 cut-off events. [2024-10-13 07:04:56,532 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-10-13 07:04:56,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1287 conditions, 556 events. 337/556 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2315 event pairs, 155 based on Foata normal form. 18/569 useless extension candidates. Maximal degree in co-relation 1271. Up to 220 conditions per place. [2024-10-13 07:04:56,538 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 52 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-10-13 07:04:56,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 301 flow [2024-10-13 07:04:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:04:56,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:04:56,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-10-13 07:04:56,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-13 07:04:56,542 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 90 flow. Second operand 5 states and 80 transitions. [2024-10-13 07:04:56,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 301 flow [2024-10-13 07:04:56,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 61 transitions, 279 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-10-13 07:04:56,546 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 115 flow [2024-10-13 07:04:56,546 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-10-13 07:04:56,547 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2024-10-13 07:04:56,547 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 115 flow [2024-10-13 07:04:56,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:56,548 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:04:56,548 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] [2024-10-13 07:04:56,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 07:04:56,548 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:04:56,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:04:56,549 INFO L85 PathProgramCache]: Analyzing trace with hash 880851478, now seen corresponding path program 1 times [2024-10-13 07:04:56,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:04:56,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995356054] [2024-10-13 07:04:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:56,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:04:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:04:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:04:56,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:04:56,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995356054] [2024-10-13 07:04:56,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995356054] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:04:56,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:04:56,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 07:04:56,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196347045] [2024-10-13 07:04:56,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:04:56,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 07:04:56,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:04:56,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 07:04:56,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 07:04:56,648 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:04:56,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:56,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:04:56,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:04:56,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:04:56,742 INFO L124 PetriNetUnfolderBase]: 321/532 cut-off events. [2024-10-13 07:04:56,742 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-10-13 07:04:56,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1253 conditions, 532 events. 321/532 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2081 event pairs, 115 based on Foata normal form. 0/494 useless extension candidates. Maximal degree in co-relation 1230. Up to 238 conditions per place. [2024-10-13 07:04:56,745 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 36 selfloop transitions, 5 changer transitions 11/55 dead transitions. [2024-10-13 07:04:56,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 55 transitions, 283 flow [2024-10-13 07:04:56,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 07:04:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 07:04:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-10-13 07:04:56,746 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-10-13 07:04:56,746 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 115 flow. Second operand 5 states and 74 transitions. [2024-10-13 07:04:56,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 55 transitions, 283 flow [2024-10-13 07:04:56,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 278 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 07:04:56,747 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 127 flow [2024-10-13 07:04:56,748 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2024-10-13 07:04:56,748 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2024-10-13 07:04:56,748 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 127 flow [2024-10-13 07:04:56,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:56,748 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:04:56,748 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] [2024-10-13 07:04:56,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 07:04:56,749 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:04:56,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:04:56,749 INFO L85 PathProgramCache]: Analyzing trace with hash 221294698, now seen corresponding path program 1 times [2024-10-13 07:04:56,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:04:56,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134543512] [2024-10-13 07:04:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:56,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:04:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:04:56,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:04:56,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:04:56,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134543512] [2024-10-13 07:04:56,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134543512] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:04:56,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375878521] [2024-10-13 07:04:56,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:56,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:04:56,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:04:56,914 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:04:56,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 07:04:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:04:56,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:04:56,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:04:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:04:57,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:04:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:04:57,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375878521] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-13 07:04:57,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-13 07:04:57,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2024-10-13 07:04:57,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508793620] [2024-10-13 07:04:57,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:04:57,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:04:57,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:04:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:04:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:04:57,248 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:04:57,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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) [2024-10-13 07:04:57,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:04:57,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:04:57,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:04:57,377 INFO L124 PetriNetUnfolderBase]: 323/544 cut-off events. [2024-10-13 07:04:57,378 INFO L125 PetriNetUnfolderBase]: For 258/258 co-relation queries the response was YES. [2024-10-13 07:04:57,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 544 events. 323/544 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2116 event pairs, 93 based on Foata normal form. 16/557 useless extension candidates. Maximal degree in co-relation 1347. Up to 217 conditions per place. [2024-10-13 07:04:57,381 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 43 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2024-10-13 07:04:57,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 301 flow [2024-10-13 07:04:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:04:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:04:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-10-13 07:04:57,382 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2024-10-13 07:04:57,382 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 127 flow. Second operand 7 states and 83 transitions. [2024-10-13 07:04:57,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 301 flow [2024-10-13 07:04:57,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 286 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-13 07:04:57,384 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 148 flow [2024-10-13 07:04:57,385 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=148, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2024-10-13 07:04:57,385 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 14 predicate places. [2024-10-13 07:04:57,385 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 148 flow [2024-10-13 07:04:57,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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) [2024-10-13 07:04:57,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:04:57,386 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] [2024-10-13 07:04:57,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 07:04:57,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-13 07:04:57,593 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:04:57,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:04:57,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1389849294, now seen corresponding path program 1 times [2024-10-13 07:04:57,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:04:57,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565152954] [2024-10-13 07:04:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:57,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:04:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:04:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:04:57,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:04:57,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565152954] [2024-10-13 07:04:57,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565152954] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:04:57,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972373442] [2024-10-13 07:04:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:57,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:04:57,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:04:57,776 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:04:57,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 07:04:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:04:57,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-13 07:04:57,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:04:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:04:57,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:04:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:04:57,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972373442] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-13 07:04:57,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-13 07:04:57,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2024-10-13 07:04:57,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926835716] [2024-10-13 07:04:57,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:04:57,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:04:57,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:04:57,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:04:57,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-10-13 07:04:57,984 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:04:57,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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) [2024-10-13 07:04:57,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:04:57,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:04:57,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:04:58,136 INFO L124 PetriNetUnfolderBase]: 353/636 cut-off events. [2024-10-13 07:04:58,136 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-10-13 07:04:58,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1648 conditions, 636 events. 353/636 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2845 event pairs, 138 based on Foata normal form. 0/612 useless extension candidates. Maximal degree in co-relation 1618. Up to 223 conditions per place. [2024-10-13 07:04:58,139 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 50 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-10-13 07:04:58,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 368 flow [2024-10-13 07:04:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:04:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:04:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-10-13 07:04:58,140 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2024-10-13 07:04:58,140 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 148 flow. Second operand 7 states and 87 transitions. [2024-10-13 07:04:58,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 368 flow [2024-10-13 07:04:58,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 61 transitions, 346 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-13 07:04:58,142 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 162 flow [2024-10-13 07:04:58,143 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-10-13 07:04:58,143 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2024-10-13 07:04:58,143 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 162 flow [2024-10-13 07:04:58,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 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) [2024-10-13 07:04:58,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:04:58,144 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] [2024-10-13 07:04:58,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 07:04:58,344 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,SelfDestructingSolverStorable6 [2024-10-13 07:04:58,345 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:04:58,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:04:58,346 INFO L85 PathProgramCache]: Analyzing trace with hash 857225227, now seen corresponding path program 1 times [2024-10-13 07:04:58,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:04:58,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080774939] [2024-10-13 07:04:58,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:58,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:04:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:04:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:04:58,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:04:58,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080774939] [2024-10-13 07:04:58,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080774939] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:04:58,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:04:58,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 07:04:58,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824715191] [2024-10-13 07:04:58,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:04:58,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:04:58,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:04:58,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:04:58,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:04:58,599 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:04:58,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:58,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:04:58,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:04:58,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:04:58,759 INFO L124 PetriNetUnfolderBase]: 365/655 cut-off events. [2024-10-13 07:04:58,760 INFO L125 PetriNetUnfolderBase]: For 547/547 co-relation queries the response was YES. [2024-10-13 07:04:58,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 655 events. 365/655 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2852 event pairs, 102 based on Foata normal form. 5/659 useless extension candidates. Maximal degree in co-relation 1778. Up to 536 conditions per place. [2024-10-13 07:04:58,763 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 40 selfloop transitions, 11 changer transitions 6/60 dead transitions. [2024-10-13 07:04:58,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 361 flow [2024-10-13 07:04:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:04:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:04:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-10-13 07:04:58,764 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2024-10-13 07:04:58,764 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 162 flow. Second operand 7 states and 87 transitions. [2024-10-13 07:04:58,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 361 flow [2024-10-13 07:04:58,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 341 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-10-13 07:04:58,766 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 228 flow [2024-10-13 07:04:58,767 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-10-13 07:04:58,767 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 23 predicate places. [2024-10-13 07:04:58,767 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 228 flow [2024-10-13 07:04:58,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:58,768 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:04:58,768 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] [2024-10-13 07:04:58,768 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 07:04:58,768 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:04:58,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:04:58,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1135586795, now seen corresponding path program 2 times [2024-10-13 07:04:58,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:04:58,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599376503] [2024-10-13 07:04:58,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:58,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:04:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:04:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:04:59,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:04:59,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599376503] [2024-10-13 07:04:59,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599376503] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:04:59,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:04:59,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 07:04:59,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723269913] [2024-10-13 07:04:59,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:04:59,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:04:59,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:04:59,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:04:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:04:59,045 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:04:59,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 228 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:59,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:04:59,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:04:59,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:04:59,205 INFO L124 PetriNetUnfolderBase]: 363/652 cut-off events. [2024-10-13 07:04:59,206 INFO L125 PetriNetUnfolderBase]: For 691/691 co-relation queries the response was YES. [2024-10-13 07:04:59,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2055 conditions, 652 events. 363/652 cut-off events. For 691/691 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2882 event pairs, 75 based on Foata normal form. 5/657 useless extension candidates. Maximal degree in co-relation 2024. Up to 536 conditions per place. [2024-10-13 07:04:59,209 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 42 selfloop transitions, 10 changer transitions 10/65 dead transitions. [2024-10-13 07:04:59,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 441 flow [2024-10-13 07:04:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:04:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:04:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-10-13 07:04:59,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2024-10-13 07:04:59,211 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 228 flow. Second operand 7 states and 89 transitions. [2024-10-13 07:04:59,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 441 flow [2024-10-13 07:04:59,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 411 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-10-13 07:04:59,214 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 243 flow [2024-10-13 07:04:59,214 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2024-10-13 07:04:59,215 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 26 predicate places. [2024-10-13 07:04:59,215 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 243 flow [2024-10-13 07:04:59,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:59,215 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:04:59,215 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] [2024-10-13 07:04:59,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 07:04:59,216 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:04:59,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:04:59,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1909171475, now seen corresponding path program 1 times [2024-10-13 07:04:59,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:04:59,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130503761] [2024-10-13 07:04:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:59,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:04:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:04:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:04:59,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:04:59,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130503761] [2024-10-13 07:04:59,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130503761] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:04:59,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:04:59,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 07:04:59,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770853685] [2024-10-13 07:04:59,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:04:59,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:04:59,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:04:59,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:04:59,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:04:59,641 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:04:59,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 243 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:59,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:04:59,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:04:59,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:04:59,874 INFO L124 PetriNetUnfolderBase]: 357/646 cut-off events. [2024-10-13 07:04:59,874 INFO L125 PetriNetUnfolderBase]: For 814/820 co-relation queries the response was YES. [2024-10-13 07:04:59,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 646 events. 357/646 cut-off events. For 814/820 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2743 event pairs, 147 based on Foata normal form. 6/652 useless extension candidates. Maximal degree in co-relation 2033. Up to 536 conditions per place. [2024-10-13 07:04:59,878 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 37 selfloop transitions, 14 changer transitions 11/65 dead transitions. [2024-10-13 07:04:59,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 481 flow [2024-10-13 07:04:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:04:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:04:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-10-13 07:04:59,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-10-13 07:04:59,880 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 243 flow. Second operand 7 states and 86 transitions. [2024-10-13 07:04:59,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 481 flow [2024-10-13 07:04:59,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 65 transitions, 443 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-13 07:04:59,884 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 304 flow [2024-10-13 07:04:59,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=304, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2024-10-13 07:04:59,885 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 30 predicate places. [2024-10-13 07:04:59,885 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 304 flow [2024-10-13 07:04:59,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:04:59,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:04:59,886 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] [2024-10-13 07:04:59,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 07:04:59,886 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:04:59,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:04:59,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1424687657, now seen corresponding path program 2 times [2024-10-13 07:04:59,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:04:59,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599269550] [2024-10-13 07:04:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:04:59,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:04:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:00,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:00,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599269550] [2024-10-13 07:05:00,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599269550] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:00,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607151747] [2024-10-13 07:05:00,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:05:00,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:00,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:00,268 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:05:00,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 07:05:00,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:05:00,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:00,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 07:05:00,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:00,497 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 07:05:00,502 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 26 treesize of output 10 [2024-10-13 07:05:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:00,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:00,638 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-13 07:05:00,638 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 40 treesize of output 56 [2024-10-13 07:05:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:00,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607151747] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:00,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:00,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-10-13 07:05:00,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274185118] [2024-10-13 07:05:00,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:00,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:05:00,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:00,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:05:00,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:05:00,676 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:00,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 304 flow. Second operand has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 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) [2024-10-13 07:05:00,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:00,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:00,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:00,891 INFO L124 PetriNetUnfolderBase]: 369/668 cut-off events. [2024-10-13 07:05:00,892 INFO L125 PetriNetUnfolderBase]: For 918/918 co-relation queries the response was YES. [2024-10-13 07:05:00,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 668 events. 369/668 cut-off events. For 918/918 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2890 event pairs, 45 based on Foata normal form. 14/682 useless extension candidates. Maximal degree in co-relation 2167. Up to 388 conditions per place. [2024-10-13 07:05:00,895 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 54 selfloop transitions, 16 changer transitions 3/76 dead transitions. [2024-10-13 07:05:00,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 565 flow [2024-10-13 07:05:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 07:05:00,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 07:05:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-10-13 07:05:00,896 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-10-13 07:05:00,896 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 304 flow. Second operand 8 states and 105 transitions. [2024-10-13 07:05:00,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 565 flow [2024-10-13 07:05:00,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 550 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-13 07:05:00,900 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 333 flow [2024-10-13 07:05:00,900 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=333, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-10-13 07:05:00,900 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2024-10-13 07:05:00,900 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 333 flow [2024-10-13 07:05:00,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 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) [2024-10-13 07:05:00,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:00,901 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] [2024-10-13 07:05:00,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-13 07:05:01,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:01,106 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:01,108 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:01,108 INFO L85 PathProgramCache]: Analyzing trace with hash -98403989, now seen corresponding path program 3 times [2024-10-13 07:05:01,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:01,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137946521] [2024-10-13 07:05:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:01,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:01,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:01,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:01,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137946521] [2024-10-13 07:05:01,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137946521] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:05:01,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:05:01,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 07:05:01,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835410952] [2024-10-13 07:05:01,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:05:01,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:05:01,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:05:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:05:01,441 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:01,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 333 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:01,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:01,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:01,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:01,620 INFO L124 PetriNetUnfolderBase]: 364/663 cut-off events. [2024-10-13 07:05:01,620 INFO L125 PetriNetUnfolderBase]: For 1324/1334 co-relation queries the response was YES. [2024-10-13 07:05:01,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 663 events. 364/663 cut-off events. For 1324/1334 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2875 event pairs, 131 based on Foata normal form. 9/672 useless extension candidates. Maximal degree in co-relation 2220. Up to 565 conditions per place. [2024-10-13 07:05:01,624 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 34 selfloop transitions, 14 changer transitions 10/61 dead transitions. [2024-10-13 07:05:01,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 498 flow [2024-10-13 07:05:01,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:05:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:05:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-10-13 07:05:01,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2024-10-13 07:05:01,625 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 333 flow. Second operand 7 states and 83 transitions. [2024-10-13 07:05:01,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 498 flow [2024-10-13 07:05:01,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 448 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-10-13 07:05:01,629 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 311 flow [2024-10-13 07:05:01,629 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2024-10-13 07:05:01,630 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2024-10-13 07:05:01,630 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 311 flow [2024-10-13 07:05:01,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:01,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:01,630 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] [2024-10-13 07:05:01,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 07:05:01,631 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:01,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:01,631 INFO L85 PathProgramCache]: Analyzing trace with hash 337700793, now seen corresponding path program 3 times [2024-10-13 07:05:01,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:01,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479028893] [2024-10-13 07:05:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:01,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:01,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479028893] [2024-10-13 07:05:01,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479028893] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:05:01,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:05:01,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 07:05:01,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415124031] [2024-10-13 07:05:01,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:05:01,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:05:01,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:01,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:05:01,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:05:01,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:01,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 311 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:01,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:01,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:01,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:02,003 INFO L124 PetriNetUnfolderBase]: 340/613 cut-off events. [2024-10-13 07:05:02,004 INFO L125 PetriNetUnfolderBase]: For 862/862 co-relation queries the response was YES. [2024-10-13 07:05:02,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2029 conditions, 613 events. 340/613 cut-off events. For 862/862 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2535 event pairs, 134 based on Foata normal form. 4/617 useless extension candidates. Maximal degree in co-relation 1996. Up to 565 conditions per place. [2024-10-13 07:05:02,007 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 37 selfloop transitions, 12 changer transitions 3/55 dead transitions. [2024-10-13 07:05:02,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 437 flow [2024-10-13 07:05:02,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:05:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:05:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-10-13 07:05:02,008 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-10-13 07:05:02,008 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 311 flow. Second operand 7 states and 78 transitions. [2024-10-13 07:05:02,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 437 flow [2024-10-13 07:05:02,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 398 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-10-13 07:05:02,010 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 286 flow [2024-10-13 07:05:02,011 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=286, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-10-13 07:05:02,011 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 31 predicate places. [2024-10-13 07:05:02,011 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 286 flow [2024-10-13 07:05:02,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:02,012 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:02,012 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] [2024-10-13 07:05:02,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 07:05:02,012 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:02,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:02,012 INFO L85 PathProgramCache]: Analyzing trace with hash 779947237, now seen corresponding path program 4 times [2024-10-13 07:05:02,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:02,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245676536] [2024-10-13 07:05:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:02,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:02,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:02,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245676536] [2024-10-13 07:05:02,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245676536] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:02,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893689866] [2024-10-13 07:05:02,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:05:02,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:02,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:02,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:05:02,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 07:05:02,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:05:02,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:02,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 07:05:02,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:02,342 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:02,342 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 29 treesize of output 25 [2024-10-13 07:05:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:02,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:02,435 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-13 07:05:02,436 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 40 treesize of output 56 [2024-10-13 07:05:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:02,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893689866] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:02,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:02,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 14 [2024-10-13 07:05:02,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500380827] [2024-10-13 07:05:02,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:02,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 07:05:02,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:02,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 07:05:02,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:05:02,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:02,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 286 flow. Second operand has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 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) [2024-10-13 07:05:02,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:02,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:02,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:02,783 INFO L124 PetriNetUnfolderBase]: 424/758 cut-off events. [2024-10-13 07:05:02,783 INFO L125 PetriNetUnfolderBase]: For 1058/1058 co-relation queries the response was YES. [2024-10-13 07:05:02,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2490 conditions, 758 events. 424/758 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3358 event pairs, 102 based on Foata normal form. 21/779 useless extension candidates. Maximal degree in co-relation 2459. Up to 600 conditions per place. [2024-10-13 07:05:02,787 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 61 selfloop transitions, 21 changer transitions 0/85 dead transitions. [2024-10-13 07:05:02,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 85 transitions, 601 flow [2024-10-13 07:05:02,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:05:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:05:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-10-13 07:05:02,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-10-13 07:05:02,788 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 286 flow. Second operand 11 states and 130 transitions. [2024-10-13 07:05:02,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 85 transitions, 601 flow [2024-10-13 07:05:02,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 577 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-13 07:05:02,791 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 388 flow [2024-10-13 07:05:02,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=388, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2024-10-13 07:05:02,791 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2024-10-13 07:05:02,791 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 388 flow [2024-10-13 07:05:02,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 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) [2024-10-13 07:05:02,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:02,792 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] [2024-10-13 07:05:02,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 07:05:02,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:02,997 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:02,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1525908377, now seen corresponding path program 4 times [2024-10-13 07:05:02,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:02,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661804459] [2024-10-13 07:05:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:02,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:03,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:03,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661804459] [2024-10-13 07:05:03,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661804459] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:05:03,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:05:03,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 07:05:03,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084703751] [2024-10-13 07:05:03,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:05:03,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:05:03,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:05:03,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:05:03,184 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:03,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 388 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:03,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:03,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:03,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:03,360 INFO L124 PetriNetUnfolderBase]: 442/788 cut-off events. [2024-10-13 07:05:03,360 INFO L125 PetriNetUnfolderBase]: For 1727/1727 co-relation queries the response was YES. [2024-10-13 07:05:03,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2877 conditions, 788 events. 442/788 cut-off events. For 1727/1727 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3514 event pairs, 151 based on Foata normal form. 12/800 useless extension candidates. Maximal degree in co-relation 2841. Up to 725 conditions per place. [2024-10-13 07:05:03,364 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 52 selfloop transitions, 13 changer transitions 0/68 dead transitions. [2024-10-13 07:05:03,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 574 flow [2024-10-13 07:05:03,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:05:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:05:03,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-10-13 07:05:03,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-10-13 07:05:03,366 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 388 flow. Second operand 7 states and 82 transitions. [2024-10-13 07:05:03,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 574 flow [2024-10-13 07:05:03,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 548 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-10-13 07:05:03,370 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 402 flow [2024-10-13 07:05:03,370 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=402, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2024-10-13 07:05:03,370 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 41 predicate places. [2024-10-13 07:05:03,370 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 402 flow [2024-10-13 07:05:03,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:03,371 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:03,371 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] [2024-10-13 07:05:03,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-13 07:05:03,371 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:03,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:03,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1300987723, now seen corresponding path program 5 times [2024-10-13 07:05:03,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:03,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020427482] [2024-10-13 07:05:03,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:03,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:03,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:03,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:03,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020427482] [2024-10-13 07:05:03,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020427482] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:03,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125019485] [2024-10-13 07:05:03,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:05:03,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:03,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:03,607 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:05:03,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 07:05:03,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:05:03,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:03,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:05:03,672 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:03,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:03,743 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 29 treesize of output 25 [2024-10-13 07:05:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:03,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:03,835 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-13 07:05:03,835 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 40 treesize of output 56 [2024-10-13 07:05:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:03,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125019485] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:03,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-13 07:05:03,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 14 [2024-10-13 07:05:03,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110455158] [2024-10-13 07:05:03,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:05:03,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-13 07:05:03,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:03,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-13 07:05:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:05:03,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:03,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 402 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:03,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:03,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:03,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:04,004 INFO L124 PetriNetUnfolderBase]: 421/768 cut-off events. [2024-10-13 07:05:04,005 INFO L125 PetriNetUnfolderBase]: For 1829/1835 co-relation queries the response was YES. [2024-10-13 07:05:04,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 768 events. 421/768 cut-off events. For 1829/1835 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3489 event pairs, 105 based on Foata normal form. 27/795 useless extension candidates. Maximal degree in co-relation 2759. Up to 601 conditions per place. [2024-10-13 07:05:04,009 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 55 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2024-10-13 07:05:04,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 599 flow [2024-10-13 07:05:04,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 07:05:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 07:05:04,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2024-10-13 07:05:04,010 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-10-13 07:05:04,010 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 402 flow. Second operand 6 states and 79 transitions. [2024-10-13 07:05:04,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 599 flow [2024-10-13 07:05:04,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 575 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-13 07:05:04,015 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 410 flow [2024-10-13 07:05:04,015 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=410, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2024-10-13 07:05:04,015 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2024-10-13 07:05:04,015 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 410 flow [2024-10-13 07:05:04,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:04,015 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:04,016 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] [2024-10-13 07:05:04,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 07:05:04,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-13 07:05:04,220 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:04,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:04,220 INFO L85 PathProgramCache]: Analyzing trace with hash -413633599, now seen corresponding path program 5 times [2024-10-13 07:05:04,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:04,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698007313] [2024-10-13 07:05:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:04,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:04,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:04,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698007313] [2024-10-13 07:05:04,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698007313] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:05:04,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:05:04,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 07:05:04,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557405364] [2024-10-13 07:05:04,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:05:04,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:05:04,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:04,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:05:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:05:04,522 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:04,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 410 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:04,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:04,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:04,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:04,691 INFO L124 PetriNetUnfolderBase]: 439/798 cut-off events. [2024-10-13 07:05:04,691 INFO L125 PetriNetUnfolderBase]: For 1994/2000 co-relation queries the response was YES. [2024-10-13 07:05:04,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2979 conditions, 798 events. 439/798 cut-off events. For 1994/2000 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3672 event pairs, 136 based on Foata normal form. 18/816 useless extension candidates. Maximal degree in co-relation 2941. Up to 734 conditions per place. [2024-10-13 07:05:04,696 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 50 selfloop transitions, 14 changer transitions 0/67 dead transitions. [2024-10-13 07:05:04,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 67 transitions, 593 flow [2024-10-13 07:05:04,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:05:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:05:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-10-13 07:05:04,697 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-10-13 07:05:04,697 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 410 flow. Second operand 7 states and 80 transitions. [2024-10-13 07:05:04,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 67 transitions, 593 flow [2024-10-13 07:05:04,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 571 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-13 07:05:04,702 INFO L231 Difference]: Finished difference. Result has 71 places, 55 transitions, 432 flow [2024-10-13 07:05:04,702 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=432, PETRI_PLACES=71, PETRI_TRANSITIONS=55} [2024-10-13 07:05:04,702 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 45 predicate places. [2024-10-13 07:05:04,703 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 55 transitions, 432 flow [2024-10-13 07:05:04,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:04,703 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:04,703 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] [2024-10-13 07:05:04,703 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-13 07:05:04,703 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:04,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:04,704 INFO L85 PathProgramCache]: Analyzing trace with hash -431005725, now seen corresponding path program 6 times [2024-10-13 07:05:04,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:04,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945714119] [2024-10-13 07:05:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:04,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:04,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:04,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945714119] [2024-10-13 07:05:04,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945714119] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:05:04,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 07:05:04,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-13 07:05:04,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123956089] [2024-10-13 07:05:04,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:05:04,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:05:04,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:04,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:05:04,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-13 07:05:04,887 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:04,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 55 transitions, 432 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:04,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:04,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:04,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:05,063 INFO L124 PetriNetUnfolderBase]: 396/704 cut-off events. [2024-10-13 07:05:05,064 INFO L125 PetriNetUnfolderBase]: For 2085/2091 co-relation queries the response was YES. [2024-10-13 07:05:05,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2765 conditions, 704 events. 396/704 cut-off events. For 2085/2091 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3057 event pairs, 115 based on Foata normal form. 10/714 useless extension candidates. Maximal degree in co-relation 2726. Up to 663 conditions per place. [2024-10-13 07:05:05,068 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 44 selfloop transitions, 11 changer transitions 3/61 dead transitions. [2024-10-13 07:05:05,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 61 transitions, 546 flow [2024-10-13 07:05:05,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:05:05,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:05:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2024-10-13 07:05:05,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-10-13 07:05:05,069 INFO L175 Difference]: Start difference. First operand has 71 places, 55 transitions, 432 flow. Second operand 7 states and 74 transitions. [2024-10-13 07:05:05,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 61 transitions, 546 flow [2024-10-13 07:05:05,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 61 transitions, 520 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-10-13 07:05:05,072 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 406 flow [2024-10-13 07:05:05,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2024-10-13 07:05:05,074 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2024-10-13 07:05:05,074 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 406 flow [2024-10-13 07:05:05,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:05,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:05,075 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] [2024-10-13 07:05:05,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-13 07:05:05,076 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:05,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2085142019, now seen corresponding path program 6 times [2024-10-13 07:05:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:05,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209104111] [2024-10-13 07:05:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:05,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:05,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:05,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:05,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209104111] [2024-10-13 07:05:05,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209104111] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:05,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051197435] [2024-10-13 07:05:05,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:05:05,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:05,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:05,271 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:05:05,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 07:05:05,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-13 07:05:05,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:05,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 07:05:05,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:05,421 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 07:05:05,422 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 26 treesize of output 10 [2024-10-13 07:05:05,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:05,432 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:05,525 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-13 07:05:05,525 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 40 treesize of output 56 [2024-10-13 07:05:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:05,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051197435] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:05,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:05,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-10-13 07:05:05,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875197348] [2024-10-13 07:05:05,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:05,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:05:05,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:05,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:05:05,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:05:05,560 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:05,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 406 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:05,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:05,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:05,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:05,727 INFO L124 PetriNetUnfolderBase]: 352/620 cut-off events. [2024-10-13 07:05:05,727 INFO L125 PetriNetUnfolderBase]: For 1752/1758 co-relation queries the response was YES. [2024-10-13 07:05:05,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2473 conditions, 620 events. 352/620 cut-off events. For 1752/1758 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2539 event pairs, 80 based on Foata normal form. 18/638 useless extension candidates. Maximal degree in co-relation 2434. Up to 497 conditions per place. [2024-10-13 07:05:05,731 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 51 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-10-13 07:05:05,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 69 transitions, 611 flow [2024-10-13 07:05:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 07:05:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 07:05:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-10-13 07:05:05,732 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39732142857142855 [2024-10-13 07:05:05,732 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 406 flow. Second operand 8 states and 89 transitions. [2024-10-13 07:05:05,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 69 transitions, 611 flow [2024-10-13 07:05:05,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 589 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-13 07:05:05,736 INFO L231 Difference]: Finished difference. Result has 73 places, 53 transitions, 418 flow [2024-10-13 07:05:05,736 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=73, PETRI_TRANSITIONS=53} [2024-10-13 07:05:05,736 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 47 predicate places. [2024-10-13 07:05:05,737 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 53 transitions, 418 flow [2024-10-13 07:05:05,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:05,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:05,737 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] [2024-10-13 07:05:05,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 07:05:05,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:05,942 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:05,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:05,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2105778690, now seen corresponding path program 1 times [2024-10-13 07:05:05,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:05,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485266906] [2024-10-13 07:05:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:05,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:06,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:06,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485266906] [2024-10-13 07:05:06,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485266906] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:06,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600800900] [2024-10-13 07:05:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:06,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:06,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:06,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:05:06,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 07:05:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:06,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 07:05:06,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:06,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:06,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600800900] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:06,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:06,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-10-13 07:05:06,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451408462] [2024-10-13 07:05:06,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:06,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 07:05:06,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:06,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 07:05:06,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-13 07:05:06,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:06,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 53 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:06,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:06,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:06,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:06,377 INFO L124 PetriNetUnfolderBase]: 758/1332 cut-off events. [2024-10-13 07:05:06,377 INFO L125 PetriNetUnfolderBase]: For 3857/3863 co-relation queries the response was YES. [2024-10-13 07:05:06,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 1332 events. 758/1332 cut-off events. For 3857/3863 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6576 event pairs, 96 based on Foata normal form. 14/1346 useless extension candidates. Maximal degree in co-relation 4949. Up to 549 conditions per place. [2024-10-13 07:05:06,384 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 83 selfloop transitions, 20 changer transitions 2/108 dead transitions. [2024-10-13 07:05:06,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 108 transitions, 922 flow [2024-10-13 07:05:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:05:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:05:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-10-13 07:05:06,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5969387755102041 [2024-10-13 07:05:06,385 INFO L175 Difference]: Start difference. First operand has 73 places, 53 transitions, 418 flow. Second operand 7 states and 117 transitions. [2024-10-13 07:05:06,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 108 transitions, 922 flow [2024-10-13 07:05:06,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 108 transitions, 861 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-10-13 07:05:06,393 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 512 flow [2024-10-13 07:05:06,393 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2024-10-13 07:05:06,393 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-10-13 07:05:06,394 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 512 flow [2024-10-13 07:05:06,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:06,394 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:06,394 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] [2024-10-13 07:05:06,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 07:05:06,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:06,595 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:06,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1525261836, now seen corresponding path program 2 times [2024-10-13 07:05:06,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:06,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416868331] [2024-10-13 07:05:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:06,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:06,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:06,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:06,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416868331] [2024-10-13 07:05:06,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416868331] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:06,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050513771] [2024-10-13 07:05:06,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:05:06,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:06,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:06,668 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 07:05:06,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 07:05:06,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:05:06,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:06,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 07:05:06,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:06,793 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:06,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050513771] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:06,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:06,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-10-13 07:05:06,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720609789] [2024-10-13 07:05:06,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:06,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 07:05:06,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:06,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 07:05:06,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-13 07:05:06,819 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:06,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 512 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:06,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:06,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:06,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:07,067 INFO L124 PetriNetUnfolderBase]: 1190/2084 cut-off events. [2024-10-13 07:05:07,067 INFO L125 PetriNetUnfolderBase]: For 5846/5852 co-relation queries the response was YES. [2024-10-13 07:05:07,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7776 conditions, 2084 events. 1190/2084 cut-off events. For 5846/5852 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11395 event pairs, 314 based on Foata normal form. 14/2097 useless extension candidates. Maximal degree in co-relation 7735. Up to 1335 conditions per place. [2024-10-13 07:05:07,078 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 94 selfloop transitions, 17 changer transitions 2/116 dead transitions. [2024-10-13 07:05:07,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 1032 flow [2024-10-13 07:05:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:05:07,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:05:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-10-13 07:05:07,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-10-13 07:05:07,079 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 512 flow. Second operand 7 states and 114 transitions. [2024-10-13 07:05:07,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 1032 flow [2024-10-13 07:05:07,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 1003 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-10-13 07:05:07,094 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 628 flow [2024-10-13 07:05:07,094 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=628, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2024-10-13 07:05:07,095 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 56 predicate places. [2024-10-13 07:05:07,095 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 628 flow [2024-10-13 07:05:07,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:07,095 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:07,095 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] [2024-10-13 07:05:07,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-13 07:05:07,296 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,SelfDestructingSolverStorable20 [2024-10-13 07:05:07,296 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:07,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:07,297 INFO L85 PathProgramCache]: Analyzing trace with hash -930481090, now seen corresponding path program 3 times [2024-10-13 07:05:07,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:07,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732912088] [2024-10-13 07:05:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:07,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:07,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:07,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:07,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732912088] [2024-10-13 07:05:07,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732912088] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:07,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906253708] [2024-10-13 07:05:07,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:05:07,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:07,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:07,378 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) [2024-10-13 07:05:07,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-13 07:05:07,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:05:07,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:07,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-13 07:05:07,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:05:07,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:05:07,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906253708] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:07,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:07,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 25 [2024-10-13 07:05:07,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652249294] [2024-10-13 07:05:07,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:07,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 07:05:07,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:07,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 07:05:07,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2024-10-13 07:05:07,939 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:07,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 628 flow. Second operand has 26 states, 26 states have (on average 7.538461538461538) internal successors, (196), 26 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:07,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:07,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:07,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:09,359 INFO L124 PetriNetUnfolderBase]: 2343/4315 cut-off events. [2024-10-13 07:05:09,360 INFO L125 PetriNetUnfolderBase]: For 12610/12610 co-relation queries the response was YES. [2024-10-13 07:05:09,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16127 conditions, 4315 events. 2343/4315 cut-off events. For 12610/12610 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28619 event pairs, 362 based on Foata normal form. 208/4519 useless extension candidates. Maximal degree in co-relation 14995. Up to 892 conditions per place. [2024-10-13 07:05:09,383 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 196 selfloop transitions, 93 changer transitions 95/387 dead transitions. [2024-10-13 07:05:09,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 387 transitions, 3398 flow [2024-10-13 07:05:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-13 07:05:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-10-13 07:05:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 516 transitions. [2024-10-13 07:05:09,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-10-13 07:05:09,386 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 628 flow. Second operand 40 states and 516 transitions. [2024-10-13 07:05:09,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 387 transitions, 3398 flow [2024-10-13 07:05:09,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 387 transitions, 3279 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-10-13 07:05:09,421 INFO L231 Difference]: Finished difference. Result has 146 places, 138 transitions, 1575 flow [2024-10-13 07:05:09,422 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1575, PETRI_PLACES=146, PETRI_TRANSITIONS=138} [2024-10-13 07:05:09,422 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 120 predicate places. [2024-10-13 07:05:09,422 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 138 transitions, 1575 flow [2024-10-13 07:05:09,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.538461538461538) internal successors, (196), 26 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:09,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:09,423 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:09,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-13 07:05:09,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:09,624 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:09,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash 895194908, now seen corresponding path program 4 times [2024-10-13 07:05:09,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:09,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180565446] [2024-10-13 07:05:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:09,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:05:09,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:09,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180565446] [2024-10-13 07:05:09,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180565446] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:09,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033696462] [2024-10-13 07:05:09,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:05:09,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:09,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:09,699 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) [2024-10-13 07:05:09,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-13 07:05:09,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:05:09,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:09,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-13 07:05:09,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:05:09,859 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 07:05:09,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033696462] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 07:05:09,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 07:05:09,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2024-10-13 07:05:09,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701851247] [2024-10-13 07:05:09,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 07:05:09,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-13 07:05:09,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:09,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-13 07:05:09,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:05:09,860 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:09,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 138 transitions, 1575 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:09,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:09,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:09,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:10,445 INFO L124 PetriNetUnfolderBase]: 2227/4153 cut-off events. [2024-10-13 07:05:10,446 INFO L125 PetriNetUnfolderBase]: For 29767/29767 co-relation queries the response was YES. [2024-10-13 07:05:10,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19404 conditions, 4153 events. 2227/4153 cut-off events. For 29767/29767 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 28550 event pairs, 319 based on Foata normal form. 4/4157 useless extension candidates. Maximal degree in co-relation 18216. Up to 1710 conditions per place. [2024-10-13 07:05:10,476 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 151 selfloop transitions, 77 changer transitions 11/242 dead transitions. [2024-10-13 07:05:10,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 242 transitions, 3086 flow [2024-10-13 07:05:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 07:05:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 07:05:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-10-13 07:05:10,477 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-10-13 07:05:10,477 INFO L175 Difference]: Start difference. First operand has 146 places, 138 transitions, 1575 flow. Second operand 10 states and 120 transitions. [2024-10-13 07:05:10,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 242 transitions, 3086 flow [2024-10-13 07:05:10,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 242 transitions, 2830 flow, removed 106 selfloop flow, removed 14 redundant places. [2024-10-13 07:05:10,543 INFO L231 Difference]: Finished difference. Result has 137 places, 158 transitions, 1861 flow [2024-10-13 07:05:10,544 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1861, PETRI_PLACES=137, PETRI_TRANSITIONS=158} [2024-10-13 07:05:10,544 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 111 predicate places. [2024-10-13 07:05:10,544 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 158 transitions, 1861 flow [2024-10-13 07:05:10,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:10,544 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:10,545 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:10,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-13 07:05:10,745 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,SelfDestructingSolverStorable22 [2024-10-13 07:05:10,745 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:10,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:10,746 INFO L85 PathProgramCache]: Analyzing trace with hash 739656916, now seen corresponding path program 5 times [2024-10-13 07:05:10,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:10,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357200899] [2024-10-13 07:05:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:10,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:10,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:10,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357200899] [2024-10-13 07:05:10,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357200899] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:10,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545532526] [2024-10-13 07:05:10,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:05:10,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:10,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:10,853 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) [2024-10-13 07:05:10,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-13 07:05:10,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:05:10,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:10,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:05:10,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:10,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:11,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545532526] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:11,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:11,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-13 07:05:11,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718513298] [2024-10-13 07:05:11,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:11,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 07:05:11,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:11,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 07:05:11,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-10-13 07:05:11,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:11,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 158 transitions, 1861 flow. Second operand has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:11,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:11,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:11,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:11,416 INFO L124 PetriNetUnfolderBase]: 1905/3520 cut-off events. [2024-10-13 07:05:11,416 INFO L125 PetriNetUnfolderBase]: For 22919/22919 co-relation queries the response was YES. [2024-10-13 07:05:11,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16856 conditions, 3520 events. 1905/3520 cut-off events. For 22919/22919 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 23091 event pairs, 1411 based on Foata normal form. 15/3535 useless extension candidates. Maximal degree in co-relation 16522. Up to 3356 conditions per place. [2024-10-13 07:05:11,439 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 132 selfloop transitions, 3 changer transitions 28/166 dead transitions. [2024-10-13 07:05:11,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 166 transitions, 2174 flow [2024-10-13 07:05:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 07:05:11,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 07:05:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-10-13 07:05:11,441 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4030612244897959 [2024-10-13 07:05:11,441 INFO L175 Difference]: Start difference. First operand has 137 places, 158 transitions, 1861 flow. Second operand 7 states and 79 transitions. [2024-10-13 07:05:11,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 166 transitions, 2174 flow [2024-10-13 07:05:11,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 166 transitions, 1997 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-10-13 07:05:11,498 INFO L231 Difference]: Finished difference. Result has 135 places, 138 transitions, 1457 flow [2024-10-13 07:05:11,498 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1457, PETRI_PLACES=135, PETRI_TRANSITIONS=138} [2024-10-13 07:05:11,499 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 109 predicate places. [2024-10-13 07:05:11,499 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 138 transitions, 1457 flow [2024-10-13 07:05:11,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:11,499 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:11,499 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:11,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-13 07:05:11,701 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,SelfDestructingSolverStorable23 [2024-10-13 07:05:11,702 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:11,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:11,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1465117270, now seen corresponding path program 6 times [2024-10-13 07:05:11,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:11,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199216698] [2024-10-13 07:05:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:11,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:11,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:11,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199216698] [2024-10-13 07:05:11,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199216698] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:11,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111262851] [2024-10-13 07:05:11,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:05:11,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:11,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:11,783 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) [2024-10-13 07:05:11,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-13 07:05:11,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:05:11,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:11,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-13 07:05:11,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:11,917 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:11,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111262851] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:11,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:11,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-10-13 07:05:11,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638890756] [2024-10-13 07:05:11,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:11,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-13 07:05:11,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:11,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-13 07:05:11,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-10-13 07:05:11,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:11,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 138 transitions, 1457 flow. Second operand has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 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) [2024-10-13 07:05:11,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:11,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:11,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:12,272 INFO L124 PetriNetUnfolderBase]: 1748/3204 cut-off events. [2024-10-13 07:05:12,272 INFO L125 PetriNetUnfolderBase]: For 18874/18874 co-relation queries the response was YES. [2024-10-13 07:05:12,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14578 conditions, 3204 events. 1748/3204 cut-off events. For 18874/18874 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20408 event pairs, 711 based on Foata normal form. 10/3214 useless extension candidates. Maximal degree in co-relation 14522. Up to 2813 conditions per place. [2024-10-13 07:05:12,292 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 115 selfloop transitions, 16 changer transitions 27/161 dead transitions. [2024-10-13 07:05:12,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 161 transitions, 1897 flow [2024-10-13 07:05:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 07:05:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 07:05:12,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-10-13 07:05:12,293 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41517857142857145 [2024-10-13 07:05:12,293 INFO L175 Difference]: Start difference. First operand has 135 places, 138 transitions, 1457 flow. Second operand 8 states and 93 transitions. [2024-10-13 07:05:12,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 161 transitions, 1897 flow [2024-10-13 07:05:12,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 161 transitions, 1873 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-10-13 07:05:12,335 INFO L231 Difference]: Finished difference. Result has 126 places, 125 transitions, 1304 flow [2024-10-13 07:05:12,336 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1304, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2024-10-13 07:05:12,336 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 100 predicate places. [2024-10-13 07:05:12,336 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 1304 flow [2024-10-13 07:05:12,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 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) [2024-10-13 07:05:12,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:12,337 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:12,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-13 07:05:12,540 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,SelfDestructingSolverStorable24 [2024-10-13 07:05:12,541 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:12,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:12,541 INFO L85 PathProgramCache]: Analyzing trace with hash 278839278, now seen corresponding path program 7 times [2024-10-13 07:05:12,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:12,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728169729] [2024-10-13 07:05:12,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:12,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:05:12,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:12,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728169729] [2024-10-13 07:05:12,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728169729] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:12,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661447418] [2024-10-13 07:05:12,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:05:12,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:12,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:12,688 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) [2024-10-13 07:05:12,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-13 07:05:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:12,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-13 07:05:12,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:05:12,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:05:13,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661447418] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:13,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:13,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-10-13 07:05:13,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818625124] [2024-10-13 07:05:13,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:13,046 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:05:13,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:13,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:05:13,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:05:13,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:13,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 1304 flow. Second operand has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:13,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:13,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:13,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:13,460 INFO L124 PetriNetUnfolderBase]: 1729/3139 cut-off events. [2024-10-13 07:05:13,460 INFO L125 PetriNetUnfolderBase]: For 18520/18524 co-relation queries the response was YES. [2024-10-13 07:05:13,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14364 conditions, 3139 events. 1729/3139 cut-off events. For 18520/18524 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19713 event pairs, 388 based on Foata normal form. 79/3218 useless extension candidates. Maximal degree in co-relation 14302. Up to 1182 conditions per place. [2024-10-13 07:05:13,489 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 116 selfloop transitions, 45 changer transitions 0/164 dead transitions. [2024-10-13 07:05:13,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 164 transitions, 1993 flow [2024-10-13 07:05:13,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:05:13,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:05:13,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-10-13 07:05:13,495 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-10-13 07:05:13,495 INFO L175 Difference]: Start difference. First operand has 126 places, 125 transitions, 1304 flow. Second operand 11 states and 114 transitions. [2024-10-13 07:05:13,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 164 transitions, 1993 flow [2024-10-13 07:05:13,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 164 transitions, 1942 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-10-13 07:05:13,622 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 1358 flow [2024-10-13 07:05:13,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1358, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2024-10-13 07:05:13,623 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 102 predicate places. [2024-10-13 07:05:13,624 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 1358 flow [2024-10-13 07:05:13,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:13,624 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:13,624 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:13,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-13 07:05:13,827 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,SelfDestructingSolverStorable25 [2024-10-13 07:05:13,828 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:13,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash -32640620, now seen corresponding path program 8 times [2024-10-13 07:05:13,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:13,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517019582] [2024-10-13 07:05:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:13,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:05:13,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:13,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517019582] [2024-10-13 07:05:13,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517019582] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:13,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395811351] [2024-10-13 07:05:13,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:05:13,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:13,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:13,967 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) [2024-10-13 07:05:13,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-13 07:05:14,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:05:14,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:14,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-13 07:05:14,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:05:14,173 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:05:14,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395811351] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:14,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:14,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-10-13 07:05:14,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942426498] [2024-10-13 07:05:14,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:14,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:05:14,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:14,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:05:14,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:05:14,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:14,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 1358 flow. Second operand has 22 states, 22 states have (on average 7.181818181818182) internal successors, (158), 22 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:14,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:14,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:14,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:14,803 INFO L124 PetriNetUnfolderBase]: 1950/3544 cut-off events. [2024-10-13 07:05:14,804 INFO L125 PetriNetUnfolderBase]: For 23116/23120 co-relation queries the response was YES. [2024-10-13 07:05:14,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17038 conditions, 3544 events. 1950/3544 cut-off events. For 23116/23120 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22384 event pairs, 592 based on Foata normal form. 66/3610 useless extension candidates. Maximal degree in co-relation 16974. Up to 1236 conditions per place. [2024-10-13 07:05:14,842 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 124 selfloop transitions, 53 changer transitions 0/180 dead transitions. [2024-10-13 07:05:14,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 180 transitions, 2303 flow [2024-10-13 07:05:14,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-13 07:05:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-13 07:05:14,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-10-13 07:05:14,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-10-13 07:05:14,847 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 1358 flow. Second operand 11 states and 119 transitions. [2024-10-13 07:05:14,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 180 transitions, 2303 flow [2024-10-13 07:05:14,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 180 transitions, 2240 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-10-13 07:05:14,918 INFO L231 Difference]: Finished difference. Result has 131 places, 131 transitions, 1619 flow [2024-10-13 07:05:14,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1619, PETRI_PLACES=131, PETRI_TRANSITIONS=131} [2024-10-13 07:05:14,919 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 105 predicate places. [2024-10-13 07:05:14,919 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 131 transitions, 1619 flow [2024-10-13 07:05:14,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.181818181818182) internal successors, (158), 22 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:14,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:14,920 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:14,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-13 07:05:15,123 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:15,124 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:15,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:15,124 INFO L85 PathProgramCache]: Analyzing trace with hash 555207431, now seen corresponding path program 1 times [2024-10-13 07:05:15,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:15,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941748021] [2024-10-13 07:05:15,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:15,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:15,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:15,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941748021] [2024-10-13 07:05:15,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941748021] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:15,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298228431] [2024-10-13 07:05:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:15,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:15,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:15,660 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) [2024-10-13 07:05:15,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-13 07:05:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:15,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:05:15,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:15,836 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-13 07:05:15,837 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 35 treesize of output 20 [2024-10-13 07:05:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:15,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:15,924 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-13 07:05:15,925 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 42 treesize of output 60 [2024-10-13 07:05:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:15,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298228431] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:15,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:15,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 20 [2024-10-13 07:05:15,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750346852] [2024-10-13 07:05:15,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:15,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:05:15,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:15,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:05:15,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:05:15,968 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:15,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 131 transitions, 1619 flow. Second operand has 21 states, 21 states have (on average 7.761904761904762) internal successors, (163), 21 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) [2024-10-13 07:05:15,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:15,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:15,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:16,709 INFO L124 PetriNetUnfolderBase]: 1990/3637 cut-off events. [2024-10-13 07:05:16,709 INFO L125 PetriNetUnfolderBase]: For 24313/24317 co-relation queries the response was YES. [2024-10-13 07:05:16,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17821 conditions, 3637 events. 1990/3637 cut-off events. For 24313/24317 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23265 event pairs, 673 based on Foata normal form. 14/3651 useless extension candidates. Maximal degree in co-relation 17755. Up to 2583 conditions per place. [2024-10-13 07:05:16,733 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 141 selfloop transitions, 42 changer transitions 34/220 dead transitions. [2024-10-13 07:05:16,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 220 transitions, 2724 flow [2024-10-13 07:05:16,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 07:05:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 07:05:16,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 204 transitions. [2024-10-13 07:05:16,735 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-10-13 07:05:16,735 INFO L175 Difference]: Start difference. First operand has 131 places, 131 transitions, 1619 flow. Second operand 17 states and 204 transitions. [2024-10-13 07:05:16,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 220 transitions, 2724 flow [2024-10-13 07:05:16,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2692 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-10-13 07:05:16,791 INFO L231 Difference]: Finished difference. Result has 147 places, 136 transitions, 1792 flow [2024-10-13 07:05:16,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1792, PETRI_PLACES=147, PETRI_TRANSITIONS=136} [2024-10-13 07:05:16,791 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 121 predicate places. [2024-10-13 07:05:16,792 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 136 transitions, 1792 flow [2024-10-13 07:05:16,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.761904761904762) internal successors, (163), 21 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) [2024-10-13 07:05:16,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:16,792 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:16,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-13 07:05:16,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-13 07:05:16,993 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:16,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:16,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1808304955, now seen corresponding path program 1 times [2024-10-13 07:05:16,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:16,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133014539] [2024-10-13 07:05:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:16,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:17,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:17,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133014539] [2024-10-13 07:05:17,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133014539] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:17,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104903201] [2024-10-13 07:05:17,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:17,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:17,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:17,284 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) [2024-10-13 07:05:17,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-13 07:05:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:17,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:05:17,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:17,466 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-13 07:05:17,466 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 34 treesize of output 10 [2024-10-13 07:05:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:17,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:17,567 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-13 07:05:17,568 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 42 treesize of output 60 [2024-10-13 07:05:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:17,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104903201] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:17,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:17,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 20 [2024-10-13 07:05:17,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039883358] [2024-10-13 07:05:17,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:17,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:05:17,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:17,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:05:17,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:05:17,612 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:17,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 136 transitions, 1792 flow. Second operand has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:17,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:17,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:17,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:18,506 INFO L124 PetriNetUnfolderBase]: 2282/4156 cut-off events. [2024-10-13 07:05:18,506 INFO L125 PetriNetUnfolderBase]: For 35223/35227 co-relation queries the response was YES. [2024-10-13 07:05:18,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21879 conditions, 4156 events. 2282/4156 cut-off events. For 35223/35227 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 27106 event pairs, 553 based on Foata normal form. 46/4202 useless extension candidates. Maximal degree in co-relation 21805. Up to 2361 conditions per place. [2024-10-13 07:05:18,527 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 186 selfloop transitions, 58 changer transitions 1/248 dead transitions. [2024-10-13 07:05:18,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 248 transitions, 3410 flow [2024-10-13 07:05:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 07:05:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-13 07:05:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 229 transitions. [2024-10-13 07:05:18,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45436507936507936 [2024-10-13 07:05:18,531 INFO L175 Difference]: Start difference. First operand has 147 places, 136 transitions, 1792 flow. Second operand 18 states and 229 transitions. [2024-10-13 07:05:18,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 248 transitions, 3410 flow [2024-10-13 07:05:18,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 248 transitions, 3280 flow, removed 24 selfloop flow, removed 14 redundant places. [2024-10-13 07:05:18,595 INFO L231 Difference]: Finished difference. Result has 149 places, 146 transitions, 1973 flow [2024-10-13 07:05:18,595 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1973, PETRI_PLACES=149, PETRI_TRANSITIONS=146} [2024-10-13 07:05:18,596 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 123 predicate places. [2024-10-13 07:05:18,596 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 146 transitions, 1973 flow [2024-10-13 07:05:18,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:18,596 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:18,596 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:18,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-13 07:05:18,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-13 07:05:18,798 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:18,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:18,799 INFO L85 PathProgramCache]: Analyzing trace with hash 2104518837, now seen corresponding path program 2 times [2024-10-13 07:05:18,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:18,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836482980] [2024-10-13 07:05:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:18,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:19,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:19,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836482980] [2024-10-13 07:05:19,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836482980] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:19,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328282895] [2024-10-13 07:05:19,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:05:19,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:19,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:19,356 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) [2024-10-13 07:05:19,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-13 07:05:19,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:05:19,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:19,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 07:05:19,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:19,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:19,626 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 29 treesize of output 21 [2024-10-13 07:05:19,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:19,633 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:19,731 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-13 07:05:19,731 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 42 treesize of output 60 [2024-10-13 07:05:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:19,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328282895] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:19,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:19,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 21 [2024-10-13 07:05:19,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690546492] [2024-10-13 07:05:19,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:19,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:05:19,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:19,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:05:19,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:05:19,776 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:19,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 146 transitions, 1973 flow. Second operand has 22 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:19,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:19,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:19,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:21,363 INFO L124 PetriNetUnfolderBase]: 2661/4848 cut-off events. [2024-10-13 07:05:21,363 INFO L125 PetriNetUnfolderBase]: For 44528/44528 co-relation queries the response was YES. [2024-10-13 07:05:21,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26004 conditions, 4848 events. 2661/4848 cut-off events. For 44528/44528 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 32637 event pairs, 819 based on Foata normal form. 30/4878 useless extension candidates. Maximal degree in co-relation 25931. Up to 3267 conditions per place. [2024-10-13 07:05:21,398 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 176 selfloop transitions, 82 changer transitions 8/269 dead transitions. [2024-10-13 07:05:21,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 269 transitions, 3651 flow [2024-10-13 07:05:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 07:05:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-13 07:05:21,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 256 transitions. [2024-10-13 07:05:21,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-10-13 07:05:21,400 INFO L175 Difference]: Start difference. First operand has 149 places, 146 transitions, 1973 flow. Second operand 21 states and 256 transitions. [2024-10-13 07:05:21,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 269 transitions, 3651 flow [2024-10-13 07:05:21,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 269 transitions, 3535 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-10-13 07:05:21,495 INFO L231 Difference]: Finished difference. Result has 166 places, 179 transitions, 2669 flow [2024-10-13 07:05:21,496 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2669, PETRI_PLACES=166, PETRI_TRANSITIONS=179} [2024-10-13 07:05:21,499 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 140 predicate places. [2024-10-13 07:05:21,499 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 179 transitions, 2669 flow [2024-10-13 07:05:21,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:21,500 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:21,500 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:21,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-13 07:05:21,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:21,701 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:21,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:21,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1741214893, now seen corresponding path program 3 times [2024-10-13 07:05:21,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:21,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576472291] [2024-10-13 07:05:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:21,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:22,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:22,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576472291] [2024-10-13 07:05:22,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576472291] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:22,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483229564] [2024-10-13 07:05:22,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:05:22,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:22,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:22,018 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) [2024-10-13 07:05:22,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-13 07:05:22,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:05:22,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:22,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-13 07:05:22,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:22,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:22,270 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 29 treesize of output 21 [2024-10-13 07:05:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 07:05:22,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:22,366 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-13 07:05:22,366 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 42 treesize of output 60 [2024-10-13 07:05:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:22,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483229564] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:22,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:22,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 7] total 22 [2024-10-13 07:05:22,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083725791] [2024-10-13 07:05:22,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:22,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 07:05:22,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 07:05:22,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-10-13 07:05:22,424 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:22,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 179 transitions, 2669 flow. Second operand has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:22,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:22,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:22,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:23,474 INFO L124 PetriNetUnfolderBase]: 2517/4602 cut-off events. [2024-10-13 07:05:23,474 INFO L125 PetriNetUnfolderBase]: For 64840/64840 co-relation queries the response was YES. [2024-10-13 07:05:23,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27636 conditions, 4602 events. 2517/4602 cut-off events. For 64840/64840 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30847 event pairs, 783 based on Foata normal form. 48/4650 useless extension candidates. Maximal degree in co-relation 27554. Up to 3267 conditions per place. [2024-10-13 07:05:23,506 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 163 selfloop transitions, 78 changer transitions 2/246 dead transitions. [2024-10-13 07:05:23,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 246 transitions, 3641 flow [2024-10-13 07:05:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 07:05:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-13 07:05:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 216 transitions. [2024-10-13 07:05:23,507 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-10-13 07:05:23,507 INFO L175 Difference]: Start difference. First operand has 166 places, 179 transitions, 2669 flow. Second operand 18 states and 216 transitions. [2024-10-13 07:05:23,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 246 transitions, 3641 flow [2024-10-13 07:05:23,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 246 transitions, 3426 flow, removed 76 selfloop flow, removed 12 redundant places. [2024-10-13 07:05:23,735 INFO L231 Difference]: Finished difference. Result has 170 places, 176 transitions, 2592 flow [2024-10-13 07:05:23,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2592, PETRI_PLACES=170, PETRI_TRANSITIONS=176} [2024-10-13 07:05:23,735 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2024-10-13 07:05:23,735 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 176 transitions, 2592 flow [2024-10-13 07:05:23,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:23,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:23,736 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:23,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-13 07:05:23,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:23,941 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:23,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:23,945 INFO L85 PathProgramCache]: Analyzing trace with hash -508949035, now seen corresponding path program 4 times [2024-10-13 07:05:23,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:23,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568663921] [2024-10-13 07:05:23,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:23,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:24,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:24,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568663921] [2024-10-13 07:05:24,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568663921] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:24,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794503511] [2024-10-13 07:05:24,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:05:24,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:24,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:24,212 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) [2024-10-13 07:05:24,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-13 07:05:24,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:05:24,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:24,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-13 07:05:24,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:24,352 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 19 treesize of output 1 [2024-10-13 07:05:24,494 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-13 07:05:24,495 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 31 treesize of output 20 [2024-10-13 07:05:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:05:24,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:24,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:24,709 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 168 treesize of output 164 [2024-10-13 07:05:24,725 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:05:24,725 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 50 treesize of output 39 [2024-10-13 07:05:24,795 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-10-13 07:05:24,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 195 treesize of output 190 [2024-10-13 07:05:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:05:25,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794503511] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:25,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:25,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2024-10-13 07:05:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669416255] [2024-10-13 07:05:25,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:25,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-13 07:05:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-13 07:05:25,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-10-13 07:05:25,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:25,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 176 transitions, 2592 flow. Second operand has 26 states, 26 states have (on average 7.384615384615385) internal successors, (192), 26 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:25,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:25,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:25,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:26,432 INFO L124 PetriNetUnfolderBase]: 2515/4588 cut-off events. [2024-10-13 07:05:26,432 INFO L125 PetriNetUnfolderBase]: For 58767/58767 co-relation queries the response was YES. [2024-10-13 07:05:26,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26942 conditions, 4588 events. 2515/4588 cut-off events. For 58767/58767 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30656 event pairs, 950 based on Foata normal form. 15/4603 useless extension candidates. Maximal degree in co-relation 26860. Up to 4099 conditions per place. [2024-10-13 07:05:26,462 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 181 selfloop transitions, 46 changer transitions 31/261 dead transitions. [2024-10-13 07:05:26,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 261 transitions, 3745 flow [2024-10-13 07:05:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 07:05:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-13 07:05:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 241 transitions. [2024-10-13 07:05:26,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4098639455782313 [2024-10-13 07:05:26,464 INFO L175 Difference]: Start difference. First operand has 170 places, 176 transitions, 2592 flow. Second operand 21 states and 241 transitions. [2024-10-13 07:05:26,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 261 transitions, 3745 flow [2024-10-13 07:05:26,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 261 transitions, 3548 flow, removed 3 selfloop flow, removed 18 redundant places. [2024-10-13 07:05:26,559 INFO L231 Difference]: Finished difference. Result has 181 places, 182 transitions, 2703 flow [2024-10-13 07:05:26,559 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2703, PETRI_PLACES=181, PETRI_TRANSITIONS=182} [2024-10-13 07:05:26,560 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 155 predicate places. [2024-10-13 07:05:26,560 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 182 transitions, 2703 flow [2024-10-13 07:05:26,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.384615384615385) internal successors, (192), 26 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:26,560 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:26,560 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:26,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-13 07:05:26,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:26,765 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:26,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:26,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1128017449, now seen corresponding path program 2 times [2024-10-13 07:05:26,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:26,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104152013] [2024-10-13 07:05:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:26,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:27,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:27,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104152013] [2024-10-13 07:05:27,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104152013] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:27,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557359541] [2024-10-13 07:05:27,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:05:27,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:27,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:27,089 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) [2024-10-13 07:05:27,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-13 07:05:27,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:05:27,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:27,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:05:27,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:27,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:27,340 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 29 treesize of output 21 [2024-10-13 07:05:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:05:27,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:27,434 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-13 07:05:27,434 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 42 treesize of output 60 [2024-10-13 07:05:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:27,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557359541] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:27,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:27,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 21 [2024-10-13 07:05:27,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387207339] [2024-10-13 07:05:27,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:27,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:05:27,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:27,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:05:27,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:05:27,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:27,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 182 transitions, 2703 flow. Second operand has 22 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:27,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:27,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:27,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:28,720 INFO L124 PetriNetUnfolderBase]: 2719/4952 cut-off events. [2024-10-13 07:05:28,720 INFO L125 PetriNetUnfolderBase]: For 66682/66682 co-relation queries the response was YES. [2024-10-13 07:05:28,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29356 conditions, 4952 events. 2719/4952 cut-off events. For 66682/66682 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 33283 event pairs, 818 based on Foata normal form. 16/4968 useless extension candidates. Maximal degree in co-relation 29266. Up to 3538 conditions per place. [2024-10-13 07:05:28,747 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 199 selfloop transitions, 99 changer transitions 11/312 dead transitions. [2024-10-13 07:05:28,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 312 transitions, 4559 flow [2024-10-13 07:05:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-13 07:05:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-13 07:05:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 307 transitions. [2024-10-13 07:05:28,748 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39158163265306123 [2024-10-13 07:05:28,748 INFO L175 Difference]: Start difference. First operand has 181 places, 182 transitions, 2703 flow. Second operand 28 states and 307 transitions. [2024-10-13 07:05:28,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 312 transitions, 4559 flow [2024-10-13 07:05:28,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 312 transitions, 4428 flow, removed 35 selfloop flow, removed 13 redundant places. [2024-10-13 07:05:28,854 INFO L231 Difference]: Finished difference. Result has 197 places, 209 transitions, 3386 flow [2024-10-13 07:05:28,855 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3386, PETRI_PLACES=197, PETRI_TRANSITIONS=209} [2024-10-13 07:05:28,855 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 171 predicate places. [2024-10-13 07:05:28,855 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 209 transitions, 3386 flow [2024-10-13 07:05:28,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:28,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:28,855 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:28,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-10-13 07:05:29,059 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,SelfDestructingSolverStorable32 [2024-10-13 07:05:29,060 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:29,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:29,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1833896661, now seen corresponding path program 3 times [2024-10-13 07:05:29,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:29,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470730961] [2024-10-13 07:05:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:29,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:29,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:29,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470730961] [2024-10-13 07:05:29,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470730961] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:29,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676736766] [2024-10-13 07:05:29,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:05:29,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:29,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:29,426 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) [2024-10-13 07:05:29,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-13 07:05:29,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:05:29,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:29,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-13 07:05:29,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:29,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-10-13 07:05:29,575 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 19 treesize of output 1 [2024-10-13 07:05:29,599 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 07:05:29,600 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 11 treesize of output 11 [2024-10-13 07:05:29,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-13 07:05:29,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-13 07:05:29,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2024-10-13 07:05:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 07:05:29,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:30,182 INFO L349 Elim1Store]: treesize reduction 38, result has 53.7 percent of original size [2024-10-13 07:05:30,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 125 [2024-10-13 07:05:30,245 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse9 (* c_~i_BA~0 4)) (.cse3 (* c_~i_AB~0 4))) (let ((.cse0 (= c_~i_AB~0 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse6 (= c_~i_BA~0 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse2 (+ c_~A~0.offset 4 .cse3)) (.cse4 (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse5 (+ c_~A~0.offset .cse9 4))) (and (or .cse0 (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (or (not (= (select .cse1 .cse2) (select v_arrayElimArr_1 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3)))) (= (select v_arrayElimArr_1 (+ .cse4 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse1 .cse5))))) (not .cse6)) (or .cse0 (and (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (let ((.cse8 (select .cse7 .cse5))) (or (not (= (select .cse7 .cse2) (select v_arrayElimArr_1 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3)))) (= (select v_arrayElimArr_1 (+ .cse4 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse8) (= (select v_arrayElimArr_1 (+ .cse9 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse8))))) (or (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (or (not (= (select .cse10 .cse2) (select v_arrayElimArr_1 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3)))) (= (select v_arrayElimArr_1 (+ .cse9 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse10 .cse5))))) .cse6))) (or (not .cse0) (and (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (let ((.cse12 (select v_arrayElimArr_1 (+ .cse4 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (.cse13 (select .cse11 .cse5))) (or (not (= (select .cse11 .cse2) .cse12)) (= .cse12 .cse13) (= (select v_arrayElimArr_1 (+ .cse9 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse13))))) (or .cse6 (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (or (not (= (select .cse14 .cse2) (select v_arrayElimArr_1 (+ .cse4 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= (select v_arrayElimArr_1 (+ .cse9 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse14 .cse5))))))))))) is different from false [2024-10-13 07:05:30,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:30,611 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2024-10-13 07:05:30,622 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:05:30,622 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 82 treesize of output 70 [2024-10-13 07:05:30,659 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-10-13 07:05:30,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 67 treesize of output 74 [2024-10-13 07:05:30,703 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:30,703 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2024-10-13 07:05:30,716 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:05:30,717 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 94 treesize of output 79 [2024-10-13 07:05:30,763 INFO L349 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2024-10-13 07:05:30,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 76 treesize of output 82 [2024-10-13 07:05:30,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:30,826 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 77 [2024-10-13 07:05:30,842 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:05:30,842 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 133 treesize of output 109 [2024-10-13 07:05:30,908 INFO L349 Elim1Store]: treesize reduction 24, result has 77.1 percent of original size [2024-10-13 07:05:30,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 129 [2024-10-13 07:05:31,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:31,038 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2024-10-13 07:05:31,057 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:05:31,057 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 82 treesize of output 70 [2024-10-13 07:05:31,103 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-10-13 07:05:31,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 67 treesize of output 74 [2024-10-13 07:05:31,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:31,153 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 71 [2024-10-13 07:05:31,162 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:05:31,162 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 121 treesize of output 100 [2024-10-13 07:05:31,203 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-10-13 07:05:31,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 97 treesize of output 89 [2024-10-13 07:05:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 2 times theorem prover too weak. 1 trivial. 2 not checked. [2024-10-13 07:05:31,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676736766] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:31,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:31,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 32 [2024-10-13 07:05:31,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627050899] [2024-10-13 07:05:31,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:31,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-13 07:05:31,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:31,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-13 07:05:31,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=834, Unknown=2, NotChecked=60, Total=1056 [2024-10-13 07:05:31,321 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:31,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 209 transitions, 3386 flow. Second operand has 33 states, 33 states have (on average 7.0) internal successors, (231), 33 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:31,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:31,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:31,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:34,128 INFO L124 PetriNetUnfolderBase]: 3609/6556 cut-off events. [2024-10-13 07:05:34,129 INFO L125 PetriNetUnfolderBase]: For 107359/107359 co-relation queries the response was YES. [2024-10-13 07:05:34,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41119 conditions, 6556 events. 3609/6556 cut-off events. For 107359/107359 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 46396 event pairs, 1013 based on Foata normal form. 70/6626 useless extension candidates. Maximal degree in co-relation 41026. Up to 4220 conditions per place. [2024-10-13 07:05:34,189 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 313 selfloop transitions, 127 changer transitions 4/447 dead transitions. [2024-10-13 07:05:34,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 447 transitions, 7240 flow [2024-10-13 07:05:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-13 07:05:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-10-13 07:05:34,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 411 transitions. [2024-10-13 07:05:34,191 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4317226890756303 [2024-10-13 07:05:34,191 INFO L175 Difference]: Start difference. First operand has 197 places, 209 transitions, 3386 flow. Second operand 34 states and 411 transitions. [2024-10-13 07:05:34,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 447 transitions, 7240 flow [2024-10-13 07:05:34,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 447 transitions, 6863 flow, removed 125 selfloop flow, removed 17 redundant places. [2024-10-13 07:05:34,437 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 4924 flow [2024-10-13 07:05:34,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3194, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4924, PETRI_PLACES=223, PETRI_TRANSITIONS=279} [2024-10-13 07:05:34,438 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 197 predicate places. [2024-10-13 07:05:34,438 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 4924 flow [2024-10-13 07:05:34,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.0) internal successors, (231), 33 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:34,438 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:34,439 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:34,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-10-13 07:05:34,642 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,SelfDestructingSolverStorable33 [2024-10-13 07:05:34,642 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:34,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1276340903, now seen corresponding path program 4 times [2024-10-13 07:05:34,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:34,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620407052] [2024-10-13 07:05:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:34,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:34,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:34,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620407052] [2024-10-13 07:05:34,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620407052] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:34,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072298923] [2024-10-13 07:05:34,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:05:34,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:34,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:34,933 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) [2024-10-13 07:05:34,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-13 07:05:35,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:05:35,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:35,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-13 07:05:35,016 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:35,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:35,104 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 37 treesize of output 25 [2024-10-13 07:05:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:35,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:35,198 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-13 07:05:35,198 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 42 treesize of output 60 [2024-10-13 07:05:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:35,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072298923] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:35,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:35,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2024-10-13 07:05:35,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168457523] [2024-10-13 07:05:35,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:35,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:05:35,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:35,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:05:35,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:05:35,243 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:35,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 279 transitions, 4924 flow. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 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) [2024-10-13 07:05:35,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:35,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:35,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:37,011 INFO L124 PetriNetUnfolderBase]: 3492/6334 cut-off events. [2024-10-13 07:05:37,011 INFO L125 PetriNetUnfolderBase]: For 138348/138348 co-relation queries the response was YES. [2024-10-13 07:05:37,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42162 conditions, 6334 events. 3492/6334 cut-off events. For 138348/138348 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 44705 event pairs, 893 based on Foata normal form. 140/6474 useless extension candidates. Maximal degree in co-relation 42058. Up to 4293 conditions per place. [2024-10-13 07:05:37,066 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 259 selfloop transitions, 150 changer transitions 10/422 dead transitions. [2024-10-13 07:05:37,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 422 transitions, 7297 flow [2024-10-13 07:05:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-13 07:05:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-10-13 07:05:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 356 transitions. [2024-10-13 07:05:37,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39732142857142855 [2024-10-13 07:05:37,068 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 4924 flow. Second operand 32 states and 356 transitions. [2024-10-13 07:05:37,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 422 transitions, 7297 flow [2024-10-13 07:05:37,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 422 transitions, 6681 flow, removed 243 selfloop flow, removed 19 redundant places. [2024-10-13 07:05:37,376 INFO L231 Difference]: Finished difference. Result has 239 places, 295 transitions, 5155 flow [2024-10-13 07:05:37,376 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5155, PETRI_PLACES=239, PETRI_TRANSITIONS=295} [2024-10-13 07:05:37,376 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 213 predicate places. [2024-10-13 07:05:37,376 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 295 transitions, 5155 flow [2024-10-13 07:05:37,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 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) [2024-10-13 07:05:37,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:37,377 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:37,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-13 07:05:37,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:37,582 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:37,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:37,582 INFO L85 PathProgramCache]: Analyzing trace with hash 936351649, now seen corresponding path program 5 times [2024-10-13 07:05:37,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:37,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086992286] [2024-10-13 07:05:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:37,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:37,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086992286] [2024-10-13 07:05:37,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086992286] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731861346] [2024-10-13 07:05:37,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:05:37,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:37,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:37,839 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) [2024-10-13 07:05:37,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-13 07:05:37,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:05:37,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:37,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:05:37,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:37,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:37,992 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 37 treesize of output 25 [2024-10-13 07:05:37,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:37,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:38,061 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-13 07:05:38,062 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 40 treesize of output 56 [2024-10-13 07:05:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:38,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731861346] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:38,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:38,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 18 [2024-10-13 07:05:38,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097844827] [2024-10-13 07:05:38,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:38,104 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:05:38,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:38,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:05:38,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:05:38,105 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:38,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 295 transitions, 5155 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:38,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:38,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:38,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:39,389 INFO L124 PetriNetUnfolderBase]: 3573/6491 cut-off events. [2024-10-13 07:05:39,389 INFO L125 PetriNetUnfolderBase]: For 122766/122768 co-relation queries the response was YES. [2024-10-13 07:05:39,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42552 conditions, 6491 events. 3573/6491 cut-off events. For 122766/122768 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 46016 event pairs, 1107 based on Foata normal form. 12/6503 useless extension candidates. Maximal degree in co-relation 42447. Up to 4839 conditions per place. [2024-10-13 07:05:39,447 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 259 selfloop transitions, 109 changer transitions 16/387 dead transitions. [2024-10-13 07:05:39,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 387 transitions, 6991 flow [2024-10-13 07:05:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 07:05:39,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-13 07:05:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 248 transitions. [2024-10-13 07:05:39,449 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-10-13 07:05:39,449 INFO L175 Difference]: Start difference. First operand has 239 places, 295 transitions, 5155 flow. Second operand 22 states and 248 transitions. [2024-10-13 07:05:39,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 387 transitions, 6991 flow [2024-10-13 07:05:39,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 387 transitions, 6679 flow, removed 15 selfloop flow, removed 24 redundant places. [2024-10-13 07:05:39,756 INFO L231 Difference]: Finished difference. Result has 241 places, 321 transitions, 5850 flow [2024-10-13 07:05:39,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4823, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5850, PETRI_PLACES=241, PETRI_TRANSITIONS=321} [2024-10-13 07:05:39,756 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 215 predicate places. [2024-10-13 07:05:39,757 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 321 transitions, 5850 flow [2024-10-13 07:05:39,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:39,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:39,757 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:39,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-10-13 07:05:39,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:39,962 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:39,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:39,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1964301891, now seen corresponding path program 6 times [2024-10-13 07:05:39,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:39,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817172371] [2024-10-13 07:05:39,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:39,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:40,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:40,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817172371] [2024-10-13 07:05:40,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817172371] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:40,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822323427] [2024-10-13 07:05:40,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:05:40,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:40,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:40,210 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) [2024-10-13 07:05:40,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-13 07:05:40,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:05:40,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:40,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 07:05:40,304 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:40,469 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 07:05:40,469 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 26 treesize of output 10 [2024-10-13 07:05:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:40,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:40,536 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-13 07:05:40,536 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 40 treesize of output 56 [2024-10-13 07:05:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:40,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822323427] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:40,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:40,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 21 [2024-10-13 07:05:40,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819465737] [2024-10-13 07:05:40,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:40,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:05:40,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:40,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:05:40,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:05:40,578 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:40,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 321 transitions, 5850 flow. Second operand has 22 states, 22 states have (on average 7.545454545454546) internal successors, (166), 22 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:40,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:40,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:40,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:41,929 INFO L124 PetriNetUnfolderBase]: 3886/7024 cut-off events. [2024-10-13 07:05:41,929 INFO L125 PetriNetUnfolderBase]: For 147880/147882 co-relation queries the response was YES. [2024-10-13 07:05:41,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47205 conditions, 7024 events. 3886/7024 cut-off events. For 147880/147882 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 50132 event pairs, 1029 based on Foata normal form. 78/7102 useless extension candidates. Maximal degree in co-relation 47095. Up to 4374 conditions per place. [2024-10-13 07:05:41,998 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 287 selfloop transitions, 138 changer transitions 2/430 dead transitions. [2024-10-13 07:05:41,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 430 transitions, 8178 flow [2024-10-13 07:05:41,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-13 07:05:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-13 07:05:41,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 244 transitions. [2024-10-13 07:05:41,999 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-10-13 07:05:42,000 INFO L175 Difference]: Start difference. First operand has 241 places, 321 transitions, 5850 flow. Second operand 20 states and 244 transitions. [2024-10-13 07:05:42,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 430 transitions, 8178 flow [2024-10-13 07:05:42,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 430 transitions, 7539 flow, removed 267 selfloop flow, removed 13 redundant places. [2024-10-13 07:05:42,707 INFO L231 Difference]: Finished difference. Result has 248 places, 337 transitions, 6071 flow [2024-10-13 07:05:42,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6071, PETRI_PLACES=248, PETRI_TRANSITIONS=337} [2024-10-13 07:05:42,708 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 222 predicate places. [2024-10-13 07:05:42,708 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 337 transitions, 6071 flow [2024-10-13 07:05:42,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.545454545454546) internal successors, (166), 22 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:42,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:42,709 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:42,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-13 07:05:42,912 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,SelfDestructingSolverStorable36 [2024-10-13 07:05:42,913 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:42,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:42,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1589704119, now seen corresponding path program 5 times [2024-10-13 07:05:42,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:42,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780619552] [2024-10-13 07:05:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:42,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:43,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:43,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780619552] [2024-10-13 07:05:43,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780619552] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:43,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187939412] [2024-10-13 07:05:43,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:05:43,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:43,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:43,261 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) [2024-10-13 07:05:43,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-13 07:05:43,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-13 07:05:43,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:43,363 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:05:43,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:43,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:43,452 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 37 treesize of output 25 [2024-10-13 07:05:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:43,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:43,532 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-13 07:05:43,532 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 40 treesize of output 56 [2024-10-13 07:05:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:43,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187939412] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:43,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:43,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 18 [2024-10-13 07:05:43,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603041631] [2024-10-13 07:05:43,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:43,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:05:43,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:05:43,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:05:43,581 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:43,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 337 transitions, 6071 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:43,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:43,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:43,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:45,625 INFO L124 PetriNetUnfolderBase]: 4214/7670 cut-off events. [2024-10-13 07:05:45,625 INFO L125 PetriNetUnfolderBase]: For 133050/133052 co-relation queries the response was YES. [2024-10-13 07:05:45,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49854 conditions, 7670 events. 4214/7670 cut-off events. For 133050/133052 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 56195 event pairs, 1310 based on Foata normal form. 26/7696 useless extension candidates. Maximal degree in co-relation 49742. Up to 5754 conditions per place. [2024-10-13 07:05:45,696 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 330 selfloop transitions, 121 changer transitions 10/464 dead transitions. [2024-10-13 07:05:45,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 464 transitions, 8229 flow [2024-10-13 07:05:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-13 07:05:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-13 07:05:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 311 transitions. [2024-10-13 07:05:45,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4113756613756614 [2024-10-13 07:05:45,698 INFO L175 Difference]: Start difference. First operand has 248 places, 337 transitions, 6071 flow. Second operand 27 states and 311 transitions. [2024-10-13 07:05:45,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 464 transitions, 8229 flow [2024-10-13 07:05:46,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 464 transitions, 7876 flow, removed 45 selfloop flow, removed 17 redundant places. [2024-10-13 07:05:46,182 INFO L231 Difference]: Finished difference. Result has 264 places, 365 transitions, 6680 flow [2024-10-13 07:05:46,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6680, PETRI_PLACES=264, PETRI_TRANSITIONS=365} [2024-10-13 07:05:46,182 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 238 predicate places. [2024-10-13 07:05:46,182 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 365 transitions, 6680 flow [2024-10-13 07:05:46,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:46,183 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:46,183 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:46,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-13 07:05:46,387 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,SelfDestructingSolverStorable37 [2024-10-13 07:05:46,388 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:46,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:46,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1031048031, now seen corresponding path program 7 times [2024-10-13 07:05:46,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:46,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531628880] [2024-10-13 07:05:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:46,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:46,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:46,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531628880] [2024-10-13 07:05:46,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531628880] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:46,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026091909] [2024-10-13 07:05:46,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:05:46,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:46,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:46,816 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) [2024-10-13 07:05:46,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-13 07:05:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:46,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:05:46,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:46,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:46,967 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 37 treesize of output 25 [2024-10-13 07:05:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:46,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:47,039 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-13 07:05:47,039 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 40 treesize of output 56 [2024-10-13 07:05:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:47,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026091909] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:47,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:47,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 18 [2024-10-13 07:05:47,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484836519] [2024-10-13 07:05:47,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:47,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-13 07:05:47,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-13 07:05:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-10-13 07:05:47,084 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:47,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 365 transitions, 6680 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:47,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:47,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:47,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:48,949 INFO L124 PetriNetUnfolderBase]: 4029/7322 cut-off events. [2024-10-13 07:05:48,949 INFO L125 PetriNetUnfolderBase]: For 134143/134145 co-relation queries the response was YES. [2024-10-13 07:05:48,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48361 conditions, 7322 events. 4029/7322 cut-off events. For 134143/134145 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 53009 event pairs, 1299 based on Foata normal form. 50/7372 useless extension candidates. Maximal degree in co-relation 48244. Up to 5582 conditions per place. [2024-10-13 07:05:49,025 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 294 selfloop transitions, 122 changer transitions 2/421 dead transitions. [2024-10-13 07:05:49,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 421 transitions, 7876 flow [2024-10-13 07:05:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-13 07:05:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-13 07:05:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 230 transitions. [2024-10-13 07:05:49,027 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-10-13 07:05:49,027 INFO L175 Difference]: Start difference. First operand has 264 places, 365 transitions, 6680 flow. Second operand 21 states and 230 transitions. [2024-10-13 07:05:49,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 421 transitions, 7876 flow [2024-10-13 07:05:49,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 421 transitions, 7636 flow, removed 88 selfloop flow, removed 12 redundant places. [2024-10-13 07:05:49,565 INFO L231 Difference]: Finished difference. Result has 270 places, 365 transitions, 6689 flow [2024-10-13 07:05:49,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6416, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6689, PETRI_PLACES=270, PETRI_TRANSITIONS=365} [2024-10-13 07:05:49,565 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 244 predicate places. [2024-10-13 07:05:49,566 INFO L471 AbstractCegarLoop]: Abstraction has has 270 places, 365 transitions, 6689 flow [2024-10-13 07:05:49,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:49,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:49,566 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:49,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-13 07:05:49,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-13 07:05:49,771 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:49,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:49,772 INFO L85 PathProgramCache]: Analyzing trace with hash -812211079, now seen corresponding path program 6 times [2024-10-13 07:05:49,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:49,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734094483] [2024-10-13 07:05:49,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:49,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:49,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:50,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:50,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734094483] [2024-10-13 07:05:50,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734094483] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:50,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002233149] [2024-10-13 07:05:50,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:05:50,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:50,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:50,121 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) [2024-10-13 07:05:50,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-13 07:05:50,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:05:50,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:50,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 07:05:50,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:50,417 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 07:05:50,417 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 26 treesize of output 10 [2024-10-13 07:05:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:50,420 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:50,487 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-13 07:05:50,487 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 40 treesize of output 56 [2024-10-13 07:05:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 07:05:50,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002233149] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:50,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:50,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 21 [2024-10-13 07:05:50,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143872361] [2024-10-13 07:05:50,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:50,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:05:50,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:50,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:05:50,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:05:50,528 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:50,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 365 transitions, 6689 flow. Second operand has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:50,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:50,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:50,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:52,847 INFO L124 PetriNetUnfolderBase]: 4859/8864 cut-off events. [2024-10-13 07:05:52,847 INFO L125 PetriNetUnfolderBase]: For 152249/152249 co-relation queries the response was YES. [2024-10-13 07:05:52,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57463 conditions, 8864 events. 4859/8864 cut-off events. For 152249/152249 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65374 event pairs, 1204 based on Foata normal form. 105/8969 useless extension candidates. Maximal degree in co-relation 57347. Up to 5198 conditions per place. [2024-10-13 07:05:53,031 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 427 selfloop transitions, 189 changer transitions 8/627 dead transitions. [2024-10-13 07:05:53,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 627 transitions, 11730 flow [2024-10-13 07:05:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-13 07:05:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-13 07:05:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 396 transitions. [2024-10-13 07:05:53,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4876847290640394 [2024-10-13 07:05:53,032 INFO L175 Difference]: Start difference. First operand has 270 places, 365 transitions, 6689 flow. Second operand 29 states and 396 transitions. [2024-10-13 07:05:53,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 627 transitions, 11730 flow [2024-10-13 07:05:53,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 627 transitions, 11366 flow, removed 18 selfloop flow, removed 18 redundant places. [2024-10-13 07:05:53,469 INFO L231 Difference]: Finished difference. Result has 288 places, 432 transitions, 8478 flow [2024-10-13 07:05:53,469 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6407, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8478, PETRI_PLACES=288, PETRI_TRANSITIONS=432} [2024-10-13 07:05:53,470 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 262 predicate places. [2024-10-13 07:05:53,470 INFO L471 AbstractCegarLoop]: Abstraction has has 288 places, 432 transitions, 8478 flow [2024-10-13 07:05:53,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:53,470 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:53,470 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:53,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-10-13 07:05:53,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-13 07:05:53,671 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:53,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash 685513861, now seen corresponding path program 7 times [2024-10-13 07:05:53,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:53,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665702708] [2024-10-13 07:05:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:53,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:53,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:53,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665702708] [2024-10-13 07:05:53,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665702708] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:53,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91064807] [2024-10-13 07:05:53,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:05:53,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:53,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:53,964 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) [2024-10-13 07:05:53,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-13 07:05:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:54,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:05:54,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:54,138 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-13 07:05:54,139 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 35 treesize of output 20 [2024-10-13 07:05:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:54,141 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:54,211 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-13 07:05:54,211 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 40 treesize of output 56 [2024-10-13 07:05:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:54,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91064807] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:54,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:54,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2024-10-13 07:05:54,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779827201] [2024-10-13 07:05:54,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:54,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:05:54,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:54,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:05:54,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:05:54,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:54,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 432 transitions, 8478 flow. Second operand has 20 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:54,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:54,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:54,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:05:56,279 INFO L124 PetriNetUnfolderBase]: 4799/8744 cut-off events. [2024-10-13 07:05:56,279 INFO L125 PetriNetUnfolderBase]: For 160709/160711 co-relation queries the response was YES. [2024-10-13 07:05:56,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58023 conditions, 8744 events. 4799/8744 cut-off events. For 160709/160711 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 64584 event pairs, 1523 based on Foata normal form. 14/8758 useless extension candidates. Maximal degree in co-relation 57899. Up to 6688 conditions per place. [2024-10-13 07:05:56,365 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 324 selfloop transitions, 124 changer transitions 18/469 dead transitions. [2024-10-13 07:05:56,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 469 transitions, 9488 flow [2024-10-13 07:05:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 07:05:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 07:05:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 186 transitions. [2024-10-13 07:05:56,368 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3907563025210084 [2024-10-13 07:05:56,368 INFO L175 Difference]: Start difference. First operand has 288 places, 432 transitions, 8478 flow. Second operand 17 states and 186 transitions. [2024-10-13 07:05:56,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 469 transitions, 9488 flow [2024-10-13 07:05:57,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 469 transitions, 9160 flow, removed 94 selfloop flow, removed 15 redundant places. [2024-10-13 07:05:57,026 INFO L231 Difference]: Finished difference. Result has 289 places, 424 transitions, 8247 flow [2024-10-13 07:05:57,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8069, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8247, PETRI_PLACES=289, PETRI_TRANSITIONS=424} [2024-10-13 07:05:57,028 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 263 predicate places. [2024-10-13 07:05:57,028 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 424 transitions, 8247 flow [2024-10-13 07:05:57,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:57,029 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:05:57,029 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:05:57,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-10-13 07:05:57,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:57,229 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:05:57,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:05:57,230 INFO L85 PathProgramCache]: Analyzing trace with hash -247561881, now seen corresponding path program 8 times [2024-10-13 07:05:57,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:05:57,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142648481] [2024-10-13 07:05:57,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:05:57,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:05:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:05:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:05:57,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:05:57,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142648481] [2024-10-13 07:05:57,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142648481] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:05:57,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389899447] [2024-10-13 07:05:57,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:05:57,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:05:57,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:05:57,827 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) [2024-10-13 07:05:57,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-13 07:05:57,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:05:57,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:05:57,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-13 07:05:57,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:05:58,058 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:05:58,059 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 29 treesize of output 21 [2024-10-13 07:05:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:05:58,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:05:58,127 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-13 07:05:58,127 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 40 treesize of output 56 [2024-10-13 07:05:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:05:58,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389899447] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:05:58,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:05:58,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-10-13 07:05:58,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948648048] [2024-10-13 07:05:58,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:05:58,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:05:58,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:05:58,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:05:58,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:05:58,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:05:58,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 424 transitions, 8247 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:05:58,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:05:58,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:05:58,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:00,163 INFO L124 PetriNetUnfolderBase]: 4331/7827 cut-off events. [2024-10-13 07:06:00,164 INFO L125 PetriNetUnfolderBase]: For 150144/150146 co-relation queries the response was YES. [2024-10-13 07:06:00,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53145 conditions, 7827 events. 4331/7827 cut-off events. For 150144/150146 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 55958 event pairs, 1321 based on Foata normal form. 107/7934 useless extension candidates. Maximal degree in co-relation 53023. Up to 6026 conditions per place. [2024-10-13 07:06:00,227 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 313 selfloop transitions, 144 changer transitions 3/463 dead transitions. [2024-10-13 07:06:00,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 463 transitions, 9364 flow [2024-10-13 07:06:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 07:06:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-13 07:06:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 209 transitions. [2024-10-13 07:06:00,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-10-13 07:06:00,228 INFO L175 Difference]: Start difference. First operand has 289 places, 424 transitions, 8247 flow. Second operand 19 states and 209 transitions. [2024-10-13 07:06:00,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 463 transitions, 9364 flow [2024-10-13 07:06:00,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 463 transitions, 9030 flow, removed 18 selfloop flow, removed 16 redundant places. [2024-10-13 07:06:00,883 INFO L231 Difference]: Finished difference. Result has 285 places, 412 transitions, 8084 flow [2024-10-13 07:06:00,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7785, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8084, PETRI_PLACES=285, PETRI_TRANSITIONS=412} [2024-10-13 07:06:00,883 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 259 predicate places. [2024-10-13 07:06:00,883 INFO L471 AbstractCegarLoop]: Abstraction has has 285 places, 412 transitions, 8084 flow [2024-10-13 07:06:00,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:00,884 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:00,884 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:00,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-13 07:06:01,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:01,088 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:01,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:01,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1278345783, now seen corresponding path program 9 times [2024-10-13 07:06:01,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:01,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736035975] [2024-10-13 07:06:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:01,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:06:01,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:01,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736035975] [2024-10-13 07:06:01,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736035975] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:01,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067874117] [2024-10-13 07:06:01,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-13 07:06:01,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:01,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:01,437 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) [2024-10-13 07:06:01,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-13 07:06:01,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-13 07:06:01,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:01,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-13 07:06:01,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:01,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-13 07:06:01,749 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-13 07:06:01,749 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 27 treesize of output 15 [2024-10-13 07:06:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-13 07:06:01,751 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:01,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:01,934 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 168 treesize of output 164 [2024-10-13 07:06:01,946 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-13 07:06:01,946 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 50 treesize of output 39 [2024-10-13 07:06:02,017 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-10-13 07:06:02,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 190 treesize of output 185 [2024-10-13 07:06:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-13 07:06:02,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067874117] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:02,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:02,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 26 [2024-10-13 07:06:02,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9987432] [2024-10-13 07:06:02,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:02,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-13 07:06:02,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:02,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-13 07:06:02,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-10-13 07:06:02,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:06:02,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 412 transitions, 8084 flow. Second operand has 27 states, 27 states have (on average 7.222222222222222) internal successors, (195), 27 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:02,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:02,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:06:02,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:04,484 INFO L124 PetriNetUnfolderBase]: 4479/8093 cut-off events. [2024-10-13 07:06:04,485 INFO L125 PetriNetUnfolderBase]: For 157989/157991 co-relation queries the response was YES. [2024-10-13 07:06:04,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55065 conditions, 8093 events. 4479/8093 cut-off events. For 157989/157991 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 58425 event pairs, 1335 based on Foata normal form. 14/8107 useless extension candidates. Maximal degree in co-relation 54944. Up to 7327 conditions per place. [2024-10-13 07:06:04,550 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 434 selfloop transitions, 55 changer transitions 27/519 dead transitions. [2024-10-13 07:06:04,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 519 transitions, 10400 flow [2024-10-13 07:06:04,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 07:06:04,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-13 07:06:04,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 254 transitions. [2024-10-13 07:06:04,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41233766233766234 [2024-10-13 07:06:04,552 INFO L175 Difference]: Start difference. First operand has 285 places, 412 transitions, 8084 flow. Second operand 22 states and 254 transitions. [2024-10-13 07:06:04,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 519 transitions, 10400 flow [2024-10-13 07:06:05,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 519 transitions, 10091 flow, removed 1 selfloop flow, removed 19 redundant places. [2024-10-13 07:06:05,073 INFO L231 Difference]: Finished difference. Result has 297 places, 436 transitions, 8461 flow [2024-10-13 07:06:05,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7775, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8461, PETRI_PLACES=297, PETRI_TRANSITIONS=436} [2024-10-13 07:06:05,074 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 271 predicate places. [2024-10-13 07:06:05,074 INFO L471 AbstractCegarLoop]: Abstraction has has 297 places, 436 transitions, 8461 flow [2024-10-13 07:06:05,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.222222222222222) internal successors, (195), 27 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:05,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:05,074 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:05,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-13 07:06:05,275 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,SelfDestructingSolverStorable42 [2024-10-13 07:06:05,275 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:05,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:05,275 INFO L85 PathProgramCache]: Analyzing trace with hash 406116903, now seen corresponding path program 10 times [2024-10-13 07:06:05,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:05,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886448561] [2024-10-13 07:06:05,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:05,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:05,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:06:05,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:05,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886448561] [2024-10-13 07:06:05,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886448561] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:05,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634942902] [2024-10-13 07:06:05,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-13 07:06:05,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:05,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:05,532 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) [2024-10-13 07:06:05,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-13 07:06:05,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-13 07:06:05,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:05,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-13 07:06:05,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:05,751 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-13 07:06:05,751 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 31 treesize of output 20 [2024-10-13 07:06:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:06:05,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:05,834 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-13 07:06:05,834 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 42 treesize of output 60 [2024-10-13 07:06:05,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:06:05,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634942902] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:05,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:05,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2024-10-13 07:06:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488166818] [2024-10-13 07:06:05,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:05,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-13 07:06:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-13 07:06:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-10-13 07:06:05,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:06:05,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 436 transitions, 8461 flow. Second operand has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:05,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:05,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:06:05,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:07,895 INFO L124 PetriNetUnfolderBase]: 4469/8101 cut-off events. [2024-10-13 07:06:07,895 INFO L125 PetriNetUnfolderBase]: For 173270/173272 co-relation queries the response was YES. [2024-10-13 07:06:07,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55933 conditions, 8101 events. 4469/8101 cut-off events. For 173270/173272 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 58577 event pairs, 1299 based on Foata normal form. 14/8115 useless extension candidates. Maximal degree in co-relation 55802. Up to 6735 conditions per place. [2024-10-13 07:06:07,963 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 422 selfloop transitions, 58 changer transitions 32/515 dead transitions. [2024-10-13 07:06:07,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 515 transitions, 10464 flow [2024-10-13 07:06:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-13 07:06:07,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-13 07:06:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 196 transitions. [2024-10-13 07:06:07,964 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2024-10-13 07:06:07,964 INFO L175 Difference]: Start difference. First operand has 297 places, 436 transitions, 8461 flow. Second operand 17 states and 196 transitions. [2024-10-13 07:06:07,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 515 transitions, 10464 flow [2024-10-13 07:06:08,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 515 transitions, 10146 flow, removed 132 selfloop flow, removed 10 redundant places. [2024-10-13 07:06:08,623 INFO L231 Difference]: Finished difference. Result has 306 places, 435 transitions, 8359 flow [2024-10-13 07:06:08,623 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8181, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8359, PETRI_PLACES=306, PETRI_TRANSITIONS=435} [2024-10-13 07:06:08,624 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 280 predicate places. [2024-10-13 07:06:08,624 INFO L471 AbstractCegarLoop]: Abstraction has has 306 places, 435 transitions, 8359 flow [2024-10-13 07:06:08,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:08,624 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:08,624 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:08,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-10-13 07:06:08,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:08,829 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:08,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash -888786901, now seen corresponding path program 11 times [2024-10-13 07:06:08,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:08,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309647966] [2024-10-13 07:06:08,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:08,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:09,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:06:09,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:09,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309647966] [2024-10-13 07:06:09,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309647966] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:09,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231896204] [2024-10-13 07:06:09,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-13 07:06:09,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:09,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:09,123 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) [2024-10-13 07:06:09,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-13 07:06:09,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-13 07:06:09,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:09,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-13 07:06:09,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:09,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:09,407 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 33 treesize of output 25 [2024-10-13 07:06:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:06:09,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:09,507 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-13 07:06:09,507 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 42 treesize of output 60 [2024-10-13 07:06:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:06:09,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231896204] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:09,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:09,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 20 [2024-10-13 07:06:09,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959507800] [2024-10-13 07:06:09,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:09,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:06:09,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:06:09,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:06:09,556 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:06:09,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 435 transitions, 8359 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:09,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:09,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:06:09,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:11,984 INFO L124 PetriNetUnfolderBase]: 4494/8139 cut-off events. [2024-10-13 07:06:11,984 INFO L125 PetriNetUnfolderBase]: For 171961/171963 co-relation queries the response was YES. [2024-10-13 07:06:12,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55934 conditions, 8139 events. 4494/8139 cut-off events. For 171961/171963 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 58973 event pairs, 1217 based on Foata normal form. 30/8169 useless extension candidates. Maximal degree in co-relation 55799. Up to 6713 conditions per place. [2024-10-13 07:06:12,051 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 435 selfloop transitions, 85 changer transitions 4/527 dead transitions. [2024-10-13 07:06:12,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 527 transitions, 10644 flow [2024-10-13 07:06:12,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-13 07:06:12,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-13 07:06:12,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 212 transitions. [2024-10-13 07:06:12,053 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-10-13 07:06:12,053 INFO L175 Difference]: Start difference. First operand has 306 places, 435 transitions, 8359 flow. Second operand 18 states and 212 transitions. [2024-10-13 07:06:12,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 527 transitions, 10644 flow [2024-10-13 07:06:12,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 527 transitions, 10404 flow, removed 58 selfloop flow, removed 13 redundant places. [2024-10-13 07:06:12,667 INFO L231 Difference]: Finished difference. Result has 310 places, 453 transitions, 8812 flow [2024-10-13 07:06:12,667 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8185, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=8812, PETRI_PLACES=310, PETRI_TRANSITIONS=453} [2024-10-13 07:06:12,667 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 284 predicate places. [2024-10-13 07:06:12,667 INFO L471 AbstractCegarLoop]: Abstraction has has 310 places, 453 transitions, 8812 flow [2024-10-13 07:06:12,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:12,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:12,668 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:12,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-10-13 07:06:12,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:12,869 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:12,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:12,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1804670255, now seen corresponding path program 12 times [2024-10-13 07:06:12,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:12,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441856723] [2024-10-13 07:06:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:12,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:06:13,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:13,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441856723] [2024-10-13 07:06:13,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441856723] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:13,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549370965] [2024-10-13 07:06:13,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-13 07:06:13,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:13,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:13,102 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) [2024-10-13 07:06:13,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-13 07:06:13,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-13 07:06:13,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:13,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 07:06:13,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:13,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:13,336 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 29 treesize of output 21 [2024-10-13 07:06:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:06:13,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:13,406 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-13 07:06:13,407 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 40 treesize of output 56 [2024-10-13 07:06:13,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 07:06:13,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549370965] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:13,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:13,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 20 [2024-10-13 07:06:13,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530718252] [2024-10-13 07:06:13,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:13,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-13 07:06:13,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:13,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-13 07:06:13,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-13 07:06:13,451 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:06:13,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 453 transitions, 8812 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:13,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:13,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:06:13,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:15,644 INFO L124 PetriNetUnfolderBase]: 4775/8690 cut-off events. [2024-10-13 07:06:15,644 INFO L125 PetriNetUnfolderBase]: For 188859/188859 co-relation queries the response was YES. [2024-10-13 07:06:15,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59573 conditions, 8690 events. 4775/8690 cut-off events. For 188859/188859 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 64236 event pairs, 1393 based on Foata normal form. 42/8732 useless extension candidates. Maximal degree in co-relation 59436. Up to 6938 conditions per place. [2024-10-13 07:06:15,885 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 451 selfloop transitions, 110 changer transitions 6/570 dead transitions. [2024-10-13 07:06:15,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 570 transitions, 11466 flow [2024-10-13 07:06:15,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-13 07:06:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-13 07:06:15,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 265 transitions. [2024-10-13 07:06:15,890 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4301948051948052 [2024-10-13 07:06:15,890 INFO L175 Difference]: Start difference. First operand has 310 places, 453 transitions, 8812 flow. Second operand 22 states and 265 transitions. [2024-10-13 07:06:15,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 570 transitions, 11466 flow [2024-10-13 07:06:16,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 570 transitions, 11185 flow, removed 87 selfloop flow, removed 13 redundant places. [2024-10-13 07:06:16,762 INFO L231 Difference]: Finished difference. Result has 326 places, 488 transitions, 9772 flow [2024-10-13 07:06:16,763 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8591, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9772, PETRI_PLACES=326, PETRI_TRANSITIONS=488} [2024-10-13 07:06:16,763 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 300 predicate places. [2024-10-13 07:06:16,763 INFO L471 AbstractCegarLoop]: Abstraction has has 326 places, 488 transitions, 9772 flow [2024-10-13 07:06:16,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:16,763 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:16,764 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:16,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-10-13 07:06:16,965 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,SelfDestructingSolverStorable45 [2024-10-13 07:06:16,966 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:16,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1283208955, now seen corresponding path program 8 times [2024-10-13 07:06:16,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:16,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423111167] [2024-10-13 07:06:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:16,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:06:17,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423111167] [2024-10-13 07:06:17,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423111167] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828889797] [2024-10-13 07:06:17,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 07:06:17,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:17,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:17,307 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) [2024-10-13 07:06:17,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-13 07:06:17,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 07:06:17,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 07:06:17,405 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-13 07:06:17,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:17,549 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-13 07:06:17,549 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 26 treesize of output 10 [2024-10-13 07:06:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:06:17,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:17,620 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-13 07:06:17,621 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 42 treesize of output 60 [2024-10-13 07:06:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:06:17,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828889797] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:17,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:17,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 22 [2024-10-13 07:06:17,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485931878] [2024-10-13 07:06:17,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:17,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-13 07:06:17,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:17,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-13 07:06:17,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-10-13 07:06:17,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:06:17,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 488 transitions, 9772 flow. Second operand has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:17,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:17,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:06:17,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 07:06:20,644 INFO L124 PetriNetUnfolderBase]: 5126/9323 cut-off events. [2024-10-13 07:06:20,645 INFO L125 PetriNetUnfolderBase]: For 220453/220455 co-relation queries the response was YES. [2024-10-13 07:06:20,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65525 conditions, 9323 events. 5126/9323 cut-off events. For 220453/220455 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 69661 event pairs, 1386 based on Foata normal form. 58/9381 useless extension candidates. Maximal degree in co-relation 65382. Up to 7057 conditions per place. [2024-10-13 07:06:20,732 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 491 selfloop transitions, 92 changer transitions 1/587 dead transitions. [2024-10-13 07:06:20,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 587 transitions, 12508 flow [2024-10-13 07:06:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-13 07:06:20,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-13 07:06:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 227 transitions. [2024-10-13 07:06:20,734 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4266917293233083 [2024-10-13 07:06:20,734 INFO L175 Difference]: Start difference. First operand has 326 places, 488 transitions, 9772 flow. Second operand 19 states and 227 transitions. [2024-10-13 07:06:20,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 587 transitions, 12508 flow [2024-10-13 07:06:21,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 587 transitions, 12058 flow, removed 193 selfloop flow, removed 10 redundant places. [2024-10-13 07:06:21,697 INFO L231 Difference]: Finished difference. Result has 338 places, 502 transitions, 9921 flow [2024-10-13 07:06:21,698 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=9380, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9921, PETRI_PLACES=338, PETRI_TRANSITIONS=502} [2024-10-13 07:06:21,698 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 312 predicate places. [2024-10-13 07:06:21,698 INFO L471 AbstractCegarLoop]: Abstraction has has 338 places, 502 transitions, 9921 flow [2024-10-13 07:06:21,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 07:06:21,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 07:06:21,698 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 07:06:21,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-10-13 07:06:21,899 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,SelfDestructingSolverStorable46 [2024-10-13 07:06:21,899 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-13 07:06:21,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 07:06:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash 134743177, now seen corresponding path program 13 times [2024-10-13 07:06:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 07:06:21,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145896335] [2024-10-13 07:06:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 07:06:21,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 07:06:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-13 07:06:22,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 07:06:22,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145896335] [2024-10-13 07:06:22,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145896335] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 07:06:22,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928612952] [2024-10-13 07:06:22,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-13 07:06:22,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 07:06:22,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 07:06:22,411 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) [2024-10-13 07:06:22,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-10-13 07:06:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 07:06:22,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-13 07:06:22,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 07:06:22,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-13 07:06:22,596 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 37 treesize of output 25 [2024-10-13 07:06:22,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:06:22,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 07:06:22,696 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-13 07:06:22,697 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 42 treesize of output 60 [2024-10-13 07:06:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-13 07:06:22,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928612952] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 07:06:22,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 07:06:22,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2024-10-13 07:06:22,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825901158] [2024-10-13 07:06:22,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 07:06:22,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-13 07:06:22,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 07:06:22,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-13 07:06:22,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-10-13 07:06:22,746 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-13 07:06:22,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 502 transitions, 9921 flow. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 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) [2024-10-13 07:06:22,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 07:06:22,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-13 07:06:22,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand