./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/weaver/chl-name-comparator-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 e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 08:20:11,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 08:20:11,855 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 08:20:11,859 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 08:20:11,859 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 08:20:11,886 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 08:20:11,887 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 08:20:11,887 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 08:20:11,888 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 08:20:11,889 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 08:20:11,889 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 08:20:11,890 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 08:20:11,890 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 08:20:11,890 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 08:20:11,891 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 08:20:11,891 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 08:20:11,893 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 08:20:11,893 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 08:20:11,893 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 08:20:11,894 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 08:20:11,894 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 08:20:11,895 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 08:20:11,895 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 08:20:11,896 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 08:20:11,896 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 08:20:11,896 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 08:20:11,896 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 08:20:11,900 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 08:20:11,900 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 08:20:11,900 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 08:20:11,901 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 08:20:11,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 08:20:11,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:20:11,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 08:20:11,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 08:20:11,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 08:20:11,902 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 08:20:11,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 08:20:11,902 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 08:20:11,902 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 08:20:11,902 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 08:20:11,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 08:20:11,906 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2024-11-12 08:20:12,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 08:20:12,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 08:20:12,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 08:20:12,261 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 08:20:12,262 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 08:20:12,263 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2024-11-12 08:20:13,715 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 08:20:13,875 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 08:20:13,877 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2024-11-12 08:20:13,883 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a29baec1/cdc9aef7ff2d427d8d5cac2292121a5b/FLAG4b0f2a73b [2024-11-12 08:20:13,895 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a29baec1/cdc9aef7ff2d427d8d5cac2292121a5b [2024-11-12 08:20:13,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 08:20:13,898 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 08:20:13,899 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 08:20:13,899 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 08:20:13,904 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 08:20:13,905 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:20:13" (1/1) ... [2024-11-12 08:20:13,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71fb44f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:13, skipping insertion in model container [2024-11-12 08:20:13,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:20:13" (1/1) ... [2024-11-12 08:20:13,928 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 08:20:14,091 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3882,3895] [2024-11-12 08:20:14,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:20:14,108 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 08:20:14,126 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c[3882,3895] [2024-11-12 08:20:14,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 08:20:14,147 INFO L204 MainTranslator]: Completed translation [2024-11-12 08:20:14,151 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14 WrapperNode [2024-11-12 08:20:14,151 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 08:20:14,153 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 08:20:14,153 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 08:20:14,153 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 08:20:14,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (1/1) ... [2024-11-12 08:20:14,170 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (1/1) ... [2024-11-12 08:20:14,223 INFO L138 Inliner]: procedures = 24, calls = 24, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 219 [2024-11-12 08:20:14,227 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 08:20:14,228 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 08:20:14,228 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 08:20:14,228 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 08:20:14,243 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (1/1) ... [2024-11-12 08:20:14,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (1/1) ... [2024-11-12 08:20:14,252 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (1/1) ... [2024-11-12 08:20:14,294 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-12 08:20:14,300 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (1/1) ... [2024-11-12 08:20:14,300 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (1/1) ... [2024-11-12 08:20:14,311 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (1/1) ... [2024-11-12 08:20:14,322 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (1/1) ... [2024-11-12 08:20:14,330 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (1/1) ... [2024-11-12 08:20:14,332 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (1/1) ... [2024-11-12 08:20:14,340 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 08:20:14,341 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 08:20:14,341 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 08:20:14,341 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 08:20:14,345 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (1/1) ... [2024-11-12 08:20:14,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 08:20:14,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:14,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-12 08:20:14,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-12 08:20:14,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 08:20:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 08:20:14,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 08:20:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 08:20:14,447 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 08:20:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 08:20:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 08:20:14,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 08:20:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 08:20:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 08:20:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 08:20:14,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 08:20:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 08:20:14,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 08:20:14,450 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 08:20:14,540 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 08:20:14,541 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 08:20:15,036 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 08:20:15,036 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 08:20:15,360 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 08:20:15,360 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-12 08:20:15,361 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:20:15 BoogieIcfgContainer [2024-11-12 08:20:15,361 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 08:20:15,363 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 08:20:15,364 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 08:20:15,367 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 08:20:15,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:20:13" (1/3) ... [2024-11-12 08:20:15,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf2b70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:20:15, skipping insertion in model container [2024-11-12 08:20:15,368 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:20:14" (2/3) ... [2024-11-12 08:20:15,368 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf2b70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:20:15, skipping insertion in model container [2024-11-12 08:20:15,369 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:20:15" (3/3) ... [2024-11-12 08:20:15,370 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2024-11-12 08:20:15,384 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 08:20:15,385 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-12 08:20:15,385 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 08:20:15,433 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 08:20:15,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 26 transitions, 66 flow [2024-11-12 08:20:15,485 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2024-11-12 08:20:15,485 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:20:15,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 5/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 26 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-11-12 08:20:15,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 26 transitions, 66 flow [2024-11-12 08:20:15,491 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 58 flow [2024-11-12 08:20:15,501 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 08:20:15,509 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;@6626fd67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 08:20:15,509 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-12 08:20:15,520 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 08:20:15,520 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2024-11-12 08:20:15,520 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 08:20:15,521 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:15,522 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:15,522 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:15,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:15,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1373352467, now seen corresponding path program 1 times [2024-11-12 08:20:15,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:15,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580129733] [2024-11-12 08:20:15,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:15,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:20:15,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:15,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580129733] [2024-11-12 08:20:15,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580129733] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:15,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:15,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:20:15,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299252522] [2024-11-12 08:20:15,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:15,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-12 08:20:15,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:15,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-12 08:20:15,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-12 08:20:15,755 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:15,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:15,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:15,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:15,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:15,834 INFO L124 PetriNetUnfolderBase]: 92/162 cut-off events. [2024-11-12 08:20:15,834 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-12 08:20:15,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 162 events. 92/162 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 386 event pairs, 68 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 300. Up to 162 conditions per place. [2024-11-12 08:20:15,838 INFO L140 encePairwiseOnDemand]: 24/26 looper letters, 20 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2024-11-12 08:20:15,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 94 flow [2024-11-12 08:20:15,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-12 08:20:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-12 08:20:15,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 28 transitions. [2024-11-12 08:20:15,876 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-11-12 08:20:15,877 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 58 flow. Second operand 2 states and 28 transitions. [2024-11-12 08:20:15,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 94 flow [2024-11-12 08:20:15,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 08:20:15,881 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 46 flow [2024-11-12 08:20:15,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2024-11-12 08:20:15,885 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2024-11-12 08:20:15,885 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 46 flow [2024-11-12 08:20:15,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:15,886 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:15,886 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:15,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 08:20:15,887 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:15,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:15,888 INFO L85 PathProgramCache]: Analyzing trace with hash 322998943, now seen corresponding path program 1 times [2024-11-12 08:20:15,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:15,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356602073] [2024-11-12 08:20:15,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:15,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:20:16,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:16,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356602073] [2024-11-12 08:20:16,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356602073] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:16,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:16,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 08:20:16,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332922680] [2024-11-12 08:20:16,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:16,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 08:20:16,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:16,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 08:20:16,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 08:20:16,095 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:16,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:16,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:16,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:16,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:16,181 INFO L124 PetriNetUnfolderBase]: 92/163 cut-off events. [2024-11-12 08:20:16,182 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 08:20:16,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 163 events. 92/163 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 391 event pairs, 68 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 331. Up to 162 conditions per place. [2024-11-12 08:20:16,185 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 19 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-11-12 08:20:16,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 90 flow [2024-11-12 08:20:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 08:20:16,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 08:20:16,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2024-11-12 08:20:16,188 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3974358974358974 [2024-11-12 08:20:16,188 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 46 flow. Second operand 3 states and 31 transitions. [2024-11-12 08:20:16,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 90 flow [2024-11-12 08:20:16,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 90 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 08:20:16,191 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 58 flow [2024-11-12 08:20:16,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-11-12 08:20:16,193 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2024-11-12 08:20:16,193 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 58 flow [2024-11-12 08:20:16,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:16,193 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:16,193 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:16,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 08:20:16,194 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:16,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash 397278911, now seen corresponding path program 1 times [2024-11-12 08:20:16,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:16,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580969040] [2024-11-12 08:20:16,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:16,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:20:16,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:16,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580969040] [2024-11-12 08:20:16,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580969040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:16,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664491831] [2024-11-12 08:20:16,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:16,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:16,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:16,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 08:20:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:16,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 08:20:16,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:20:16,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:20:16,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664491831] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:16,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:16,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-12 08:20:16,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854328564] [2024-11-12 08:20:16,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:16,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 08:20:16,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:16,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 08:20:16,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-12 08:20:16,535 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:16,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:16,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:16,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:16,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:16,594 INFO L124 PetriNetUnfolderBase]: 92/165 cut-off events. [2024-11-12 08:20:16,594 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 08:20:16,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 165 events. 92/165 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 391 event pairs, 68 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 342. Up to 162 conditions per place. [2024-11-12 08:20:16,596 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 19 selfloop transitions, 4 changer transitions 0/24 dead transitions. [2024-11-12 08:20:16,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 112 flow [2024-11-12 08:20:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:20:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:20:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2024-11-12 08:20:16,597 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2024-11-12 08:20:16,597 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 58 flow. Second operand 5 states and 40 transitions. [2024-11-12 08:20:16,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 112 flow [2024-11-12 08:20:16,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 108 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-12 08:20:16,599 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 80 flow [2024-11-12 08:20:16,599 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-11-12 08:20:16,599 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2024-11-12 08:20:16,600 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 80 flow [2024-11-12 08:20:16,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:16,600 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:16,600 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:16,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 08:20:16,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:16,805 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:16,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:16,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1068563135, now seen corresponding path program 2 times [2024-11-12 08:20:16,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:16,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415087923] [2024-11-12 08:20:16,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:16,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:17,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:17,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415087923] [2024-11-12 08:20:17,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415087923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:17,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:17,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 08:20:17,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334077008] [2024-11-12 08:20:17,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:17,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 08:20:17,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 08:20:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-12 08:20:17,357 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:17,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 80 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2024-11-12 08:20:17,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:17,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:17,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:17,556 INFO L124 PetriNetUnfolderBase]: 222/403 cut-off events. [2024-11-12 08:20:17,556 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-12 08:20:17,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 403 events. 222/403 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1539 event pairs, 68 based on Foata normal form. 1/343 useless extension candidates. Maximal degree in co-relation 827. Up to 173 conditions per place. [2024-11-12 08:20:17,559 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 44 selfloop transitions, 4 changer transitions 8/57 dead transitions. [2024-11-12 08:20:17,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 57 transitions, 265 flow [2024-11-12 08:20:17,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:20:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:20:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2024-11-12 08:20:17,560 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-11-12 08:20:17,561 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 80 flow. Second operand 5 states and 70 transitions. [2024-11-12 08:20:17,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 57 transitions, 265 flow [2024-11-12 08:20:17,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 57 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-12 08:20:17,562 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 99 flow [2024-11-12 08:20:17,563 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2024-11-12 08:20:17,563 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2024-11-12 08:20:17,563 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 99 flow [2024-11-12 08:20:17,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2024-11-12 08:20:17,564 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:17,564 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:17,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 08:20:17,564 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:17,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:17,565 INFO L85 PathProgramCache]: Analyzing trace with hash -709564833, now seen corresponding path program 3 times [2024-11-12 08:20:17,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:17,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002449461] [2024-11-12 08:20:17,565 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:17,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:18,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:18,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:18,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002449461] [2024-11-12 08:20:18,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002449461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:18,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:18,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 08:20:18,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166329789] [2024-11-12 08:20:18,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:18,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 08:20:18,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:18,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 08:20:18,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-12 08:20:18,047 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:18,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 99 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2024-11-12 08:20:18,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:18,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:18,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:18,343 INFO L124 PetriNetUnfolderBase]: 371/674 cut-off events. [2024-11-12 08:20:18,343 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-11-12 08:20:18,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1619 conditions, 674 events. 371/674 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2858 event pairs, 177 based on Foata normal form. 3/677 useless extension candidates. Maximal degree in co-relation 1608. Up to 384 conditions per place. [2024-11-12 08:20:18,347 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 45 selfloop transitions, 4 changer transitions 7/57 dead transitions. [2024-11-12 08:20:18,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 57 transitions, 308 flow [2024-11-12 08:20:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:20:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:20:18,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2024-11-12 08:20:18,348 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-11-12 08:20:18,349 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 99 flow. Second operand 5 states and 63 transitions. [2024-11-12 08:20:18,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 57 transitions, 308 flow [2024-11-12 08:20:18,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 57 transitions, 300 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-12 08:20:18,353 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 122 flow [2024-11-12 08:20:18,353 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2024-11-12 08:20:18,354 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 16 predicate places. [2024-11-12 08:20:18,354 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 122 flow [2024-11-12 08:20:18,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2024-11-12 08:20:18,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:18,354 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:18,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 08:20:18,354 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:18,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:18,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1546106423, now seen corresponding path program 4 times [2024-11-12 08:20:18,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:18,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35326687] [2024-11-12 08:20:18,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:18,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:18,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:18,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35326687] [2024-11-12 08:20:18,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35326687] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:18,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:18,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 08:20:18,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043037647] [2024-11-12 08:20:18,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:18,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 08:20:18,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:18,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 08:20:18,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-12 08:20:18,565 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:18,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 122 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2024-11-12 08:20:18,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:18,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:18,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:18,777 INFO L124 PetriNetUnfolderBase]: 356/632 cut-off events. [2024-11-12 08:20:18,777 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-11-12 08:20:18,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1696 conditions, 632 events. 356/632 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2667 event pairs, 158 based on Foata normal form. 4/636 useless extension candidates. Maximal degree in co-relation 1682. Up to 291 conditions per place. [2024-11-12 08:20:18,781 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 46 selfloop transitions, 4 changer transitions 9/60 dead transitions. [2024-11-12 08:20:18,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 60 transitions, 345 flow [2024-11-12 08:20:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:20:18,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:20:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-11-12 08:20:18,782 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-11-12 08:20:18,782 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 122 flow. Second operand 5 states and 66 transitions. [2024-11-12 08:20:18,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 60 transitions, 345 flow [2024-11-12 08:20:18,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 333 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-12 08:20:18,785 INFO L231 Difference]: Finished difference. Result has 45 places, 30 transitions, 140 flow [2024-11-12 08:20:18,785 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=45, PETRI_TRANSITIONS=30} [2024-11-12 08:20:18,786 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2024-11-12 08:20:18,786 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 30 transitions, 140 flow [2024-11-12 08:20:18,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2024-11-12 08:20:18,787 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:18,787 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:18,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 08:20:18,787 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:18,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:18,788 INFO L85 PathProgramCache]: Analyzing trace with hash -513537359, now seen corresponding path program 5 times [2024-11-12 08:20:18,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:18,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200559852] [2024-11-12 08:20:18,789 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:18,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:19,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:19,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200559852] [2024-11-12 08:20:19,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200559852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:19,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:19,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 08:20:19,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132188561] [2024-11-12 08:20:19,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:19,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 08:20:19,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:19,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 08:20:19,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-12 08:20:19,048 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:19,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 30 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2024-11-12 08:20:19,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:19,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:19,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:19,234 INFO L124 PetriNetUnfolderBase]: 396/694 cut-off events. [2024-11-12 08:20:19,234 INFO L125 PetriNetUnfolderBase]: For 741/741 co-relation queries the response was YES. [2024-11-12 08:20:19,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 694 events. 396/694 cut-off events. For 741/741 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2897 event pairs, 151 based on Foata normal form. 6/700 useless extension candidates. Maximal degree in co-relation 1977. Up to 368 conditions per place. [2024-11-12 08:20:19,238 INFO L140 encePairwiseOnDemand]: 20/26 looper letters, 46 selfloop transitions, 5 changer transitions 9/61 dead transitions. [2024-11-12 08:20:19,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 385 flow [2024-11-12 08:20:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:20:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:20:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2024-11-12 08:20:19,239 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-11-12 08:20:19,239 INFO L175 Difference]: Start difference. First operand has 45 places, 30 transitions, 140 flow. Second operand 5 states and 66 transitions. [2024-11-12 08:20:19,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 385 flow [2024-11-12 08:20:19,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-12 08:20:19,242 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 170 flow [2024-11-12 08:20:19,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2024-11-12 08:20:19,243 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 24 predicate places. [2024-11-12 08:20:19,243 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 170 flow [2024-11-12 08:20:19,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2024-11-12 08:20:19,243 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:19,244 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:19,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-12 08:20:19,244 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:19,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:19,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1658143472, now seen corresponding path program 1 times [2024-11-12 08:20:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194743158] [2024-11-12 08:20:19,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:19,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:19,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194743158] [2024-11-12 08:20:19,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194743158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:19,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027724074] [2024-11-12 08:20:19,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:19,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:19,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:19,349 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:19,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 08:20:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:19,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-12 08:20:19,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:19,467 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:19,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027724074] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:19,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 08:20:19,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-11-12 08:20:19,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132603355] [2024-11-12 08:20:19,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:19,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:20:19,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:19,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:20:19,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-12 08:20:19,507 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:19,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:19,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:19,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:19,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:19,630 INFO L124 PetriNetUnfolderBase]: 413/718 cut-off events. [2024-11-12 08:20:19,630 INFO L125 PetriNetUnfolderBase]: For 915/915 co-relation queries the response was YES. [2024-11-12 08:20:19,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2119 conditions, 718 events. 413/718 cut-off events. For 915/915 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3132 event pairs, 40 based on Foata normal form. 9/727 useless extension candidates. Maximal degree in co-relation 2101. Up to 318 conditions per place. [2024-11-12 08:20:19,634 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 57 selfloop transitions, 6 changer transitions 2/66 dead transitions. [2024-11-12 08:20:19,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 428 flow [2024-11-12 08:20:19,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:20:19,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:20:19,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2024-11-12 08:20:19,635 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2024-11-12 08:20:19,635 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 170 flow. Second operand 5 states and 68 transitions. [2024-11-12 08:20:19,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 428 flow [2024-11-12 08:20:19,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 407 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-12 08:20:19,638 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 196 flow [2024-11-12 08:20:19,638 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2024-11-12 08:20:19,638 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 27 predicate places. [2024-11-12 08:20:19,639 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 196 flow [2024-11-12 08:20:19,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:19,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:19,639 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:19,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 08:20:19,843 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,SelfDestructingSolverStorable7 [2024-11-12 08:20:19,844 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:19,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:19,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1577565820, now seen corresponding path program 1 times [2024-11-12 08:20:19,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:19,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887833476] [2024-11-12 08:20:19,845 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:19,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:19,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:19,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887833476] [2024-11-12 08:20:19,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887833476] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:19,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396723330] [2024-11-12 08:20:19,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:19,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:19,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:19,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:19,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 08:20:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:20,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-12 08:20:20,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:20,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:20,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396723330] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:20,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 08:20:20,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-11-12 08:20:20,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472534094] [2024-11-12 08:20:20,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:20,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:20:20,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:20,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:20:20,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-12 08:20:20,114 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:20,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:20,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:20,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:20,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:20,264 INFO L124 PetriNetUnfolderBase]: 449/778 cut-off events. [2024-11-12 08:20:20,266 INFO L125 PetriNetUnfolderBase]: For 1358/1358 co-relation queries the response was YES. [2024-11-12 08:20:20,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2299 conditions, 778 events. 449/778 cut-off events. For 1358/1358 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3338 event pairs, 87 based on Foata normal form. 8/786 useless extension candidates. Maximal degree in co-relation 2280. Up to 339 conditions per place. [2024-11-12 08:20:20,272 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 53 selfloop transitions, 8 changer transitions 2/64 dead transitions. [2024-11-12 08:20:20,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 64 transitions, 450 flow [2024-11-12 08:20:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:20:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:20:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-11-12 08:20:20,274 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2024-11-12 08:20:20,274 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 196 flow. Second operand 5 states and 64 transitions. [2024-11-12 08:20:20,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 64 transitions, 450 flow [2024-11-12 08:20:20,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 436 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-12 08:20:20,280 INFO L231 Difference]: Finished difference. Result has 56 places, 36 transitions, 235 flow [2024-11-12 08:20:20,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=56, PETRI_TRANSITIONS=36} [2024-11-12 08:20:20,282 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 31 predicate places. [2024-11-12 08:20:20,282 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 36 transitions, 235 flow [2024-11-12 08:20:20,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:20,283 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:20,283 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:20,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-12 08:20:20,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:20,484 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:20,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:20,485 INFO L85 PathProgramCache]: Analyzing trace with hash -307064914, now seen corresponding path program 2 times [2024-11-12 08:20:20,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:20,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290199113] [2024-11-12 08:20:20,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:20,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:20,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:20,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290199113] [2024-11-12 08:20:20,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290199113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:20,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696620014] [2024-11-12 08:20:20,570 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:20:20,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:20,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:20,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:20,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 08:20:20,648 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:20:20,648 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:20:20,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-12 08:20:20,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:20,770 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:20,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696620014] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:20,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 08:20:20,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-11-12 08:20:20,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790235705] [2024-11-12 08:20:20,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:20,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:20:20,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:20,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:20:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-12 08:20:20,875 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:20,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 36 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:20,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:20,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:20,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:21,146 INFO L124 PetriNetUnfolderBase]: 479/835 cut-off events. [2024-11-12 08:20:21,150 INFO L125 PetriNetUnfolderBase]: For 1917/1917 co-relation queries the response was YES. [2024-11-12 08:20:21,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2542 conditions, 835 events. 479/835 cut-off events. For 1917/1917 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3762 event pairs, 80 based on Foata normal form. 9/844 useless extension candidates. Maximal degree in co-relation 2521. Up to 541 conditions per place. [2024-11-12 08:20:21,159 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 52 selfloop transitions, 11 changer transitions 2/66 dead transitions. [2024-11-12 08:20:21,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 485 flow [2024-11-12 08:20:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:20:21,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:20:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2024-11-12 08:20:21,167 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-12 08:20:21,167 INFO L175 Difference]: Start difference. First operand has 56 places, 36 transitions, 235 flow. Second operand 5 states and 65 transitions. [2024-11-12 08:20:21,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 485 flow [2024-11-12 08:20:21,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 471 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-12 08:20:21,195 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 309 flow [2024-11-12 08:20:21,195 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2024-11-12 08:20:21,200 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2024-11-12 08:20:21,202 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 309 flow [2024-11-12 08:20:21,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:21,202 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:21,202 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:21,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 08:20:21,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:21,407 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:21,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:21,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1555071804, now seen corresponding path program 3 times [2024-11-12 08:20:21,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:21,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015273591] [2024-11-12 08:20:21,408 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:21,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:21,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:21,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015273591] [2024-11-12 08:20:21,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015273591] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:21,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:21,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 08:20:21,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254460673] [2024-11-12 08:20:21,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:21,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:20:21,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:21,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:20:21,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:20:21,572 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:21,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 309 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:21,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:21,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:21,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:21,773 INFO L124 PetriNetUnfolderBase]: 473/817 cut-off events. [2024-11-12 08:20:21,773 INFO L125 PetriNetUnfolderBase]: For 2050/2050 co-relation queries the response was YES. [2024-11-12 08:20:21,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2643 conditions, 817 events. 473/817 cut-off events. For 2050/2050 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3605 event pairs, 227 based on Foata normal form. 2/819 useless extension candidates. Maximal degree in co-relation 2620. Up to 469 conditions per place. [2024-11-12 08:20:21,777 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 46 selfloop transitions, 9 changer transitions 7/63 dead transitions. [2024-11-12 08:20:21,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 500 flow [2024-11-12 08:20:21,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:20:21,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:20:21,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 62 transitions. [2024-11-12 08:20:21,778 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-11-12 08:20:21,779 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 309 flow. Second operand 5 states and 62 transitions. [2024-11-12 08:20:21,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 500 flow [2024-11-12 08:20:21,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 500 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 08:20:21,783 INFO L231 Difference]: Finished difference. Result has 64 places, 40 transitions, 315 flow [2024-11-12 08:20:21,783 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=315, PETRI_PLACES=64, PETRI_TRANSITIONS=40} [2024-11-12 08:20:21,783 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2024-11-12 08:20:21,783 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 40 transitions, 315 flow [2024-11-12 08:20:21,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:21,784 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:21,784 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:21,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 08:20:21,784 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:21,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:21,785 INFO L85 PathProgramCache]: Analyzing trace with hash 398039530, now seen corresponding path program 2 times [2024-11-12 08:20:21,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:21,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256233801] [2024-11-12 08:20:21,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:21,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:21,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:21,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256233801] [2024-11-12 08:20:21,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256233801] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:21,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:21,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 08:20:21,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749267304] [2024-11-12 08:20:21,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:21,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:20:21,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:21,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:20:21,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:20:21,859 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:21,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 40 transitions, 315 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:21,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:21,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:21,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:22,002 INFO L124 PetriNetUnfolderBase]: 462/798 cut-off events. [2024-11-12 08:20:22,002 INFO L125 PetriNetUnfolderBase]: For 2345/2345 co-relation queries the response was YES. [2024-11-12 08:20:22,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2627 conditions, 798 events. 462/798 cut-off events. For 2345/2345 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3437 event pairs, 221 based on Foata normal form. 3/801 useless extension candidates. Maximal degree in co-relation 2603. Up to 443 conditions per place. [2024-11-12 08:20:22,007 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 40 selfloop transitions, 12 changer transitions 7/60 dead transitions. [2024-11-12 08:20:22,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 506 flow [2024-11-12 08:20:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:20:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:20:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2024-11-12 08:20:22,008 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4461538461538462 [2024-11-12 08:20:22,009 INFO L175 Difference]: Start difference. First operand has 64 places, 40 transitions, 315 flow. Second operand 5 states and 58 transitions. [2024-11-12 08:20:22,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 506 flow [2024-11-12 08:20:22,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 60 transitions, 473 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-12 08:20:22,014 INFO L231 Difference]: Finished difference. Result has 62 places, 42 transitions, 334 flow [2024-11-12 08:20:22,014 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=62, PETRI_TRANSITIONS=42} [2024-11-12 08:20:22,015 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 37 predicate places. [2024-11-12 08:20:22,015 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 42 transitions, 334 flow [2024-11-12 08:20:22,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:22,015 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:22,015 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:22,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 08:20:22,015 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:22,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:22,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1066661762, now seen corresponding path program 3 times [2024-11-12 08:20:22,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:22,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473609916] [2024-11-12 08:20:22,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:22,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:22,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:22,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473609916] [2024-11-12 08:20:22,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473609916] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:22,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:22,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 08:20:22,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546825443] [2024-11-12 08:20:22,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:22,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 08:20:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 08:20:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 08:20:22,099 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:22,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 42 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:22,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:22,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:22,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:22,241 INFO L124 PetriNetUnfolderBase]: 437/749 cut-off events. [2024-11-12 08:20:22,241 INFO L125 PetriNetUnfolderBase]: For 2317/2317 co-relation queries the response was YES. [2024-11-12 08:20:22,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2461 conditions, 749 events. 437/749 cut-off events. For 2317/2317 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3150 event pairs, 184 based on Foata normal form. 8/757 useless extension candidates. Maximal degree in co-relation 2439. Up to 355 conditions per place. [2024-11-12 08:20:22,272 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 44 selfloop transitions, 13 changer transitions 5/63 dead transitions. [2024-11-12 08:20:22,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 523 flow [2024-11-12 08:20:22,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 08:20:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 08:20:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2024-11-12 08:20:22,274 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-11-12 08:20:22,274 INFO L175 Difference]: Start difference. First operand has 62 places, 42 transitions, 334 flow. Second operand 5 states and 61 transitions. [2024-11-12 08:20:22,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 523 flow [2024-11-12 08:20:22,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 511 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-12 08:20:22,278 INFO L231 Difference]: Finished difference. Result has 65 places, 42 transitions, 354 flow [2024-11-12 08:20:22,279 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=354, PETRI_PLACES=65, PETRI_TRANSITIONS=42} [2024-11-12 08:20:22,279 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 40 predicate places. [2024-11-12 08:20:22,279 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 42 transitions, 354 flow [2024-11-12 08:20:22,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:22,280 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:22,280 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:22,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 08:20:22,280 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:22,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:22,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1458736781, now seen corresponding path program 1 times [2024-11-12 08:20:22,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:22,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127632171] [2024-11-12 08:20:22,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:23,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:23,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127632171] [2024-11-12 08:20:23,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127632171] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:23,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412197691] [2024-11-12 08:20:23,051 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:23,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:23,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:23,052 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:23,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 08:20:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:23,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 08:20:23,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:23,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 89 [2024-11-12 08:20:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:23,532 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:24,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:24,975 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 136 treesize of output 96 [2024-11-12 08:20:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:25,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412197691] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:25,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:25,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-11-12 08:20:25,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711009085] [2024-11-12 08:20:25,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:25,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 08:20:25,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:25,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 08:20:25,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2024-11-12 08:20:25,125 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:25,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 42 transitions, 354 flow. Second operand has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:25,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:25,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:25,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:26,297 INFO L124 PetriNetUnfolderBase]: 715/1223 cut-off events. [2024-11-12 08:20:26,298 INFO L125 PetriNetUnfolderBase]: For 3521/3521 co-relation queries the response was YES. [2024-11-12 08:20:26,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3879 conditions, 1223 events. 715/1223 cut-off events. For 3521/3521 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5805 event pairs, 172 based on Foata normal form. 1/1224 useless extension candidates. Maximal degree in co-relation 3856. Up to 339 conditions per place. [2024-11-12 08:20:26,305 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 96 selfloop transitions, 30 changer transitions 12/139 dead transitions. [2024-11-12 08:20:26,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 139 transitions, 1073 flow [2024-11-12 08:20:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-12 08:20:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-12 08:20:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 160 transitions. [2024-11-12 08:20:26,307 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2024-11-12 08:20:26,307 INFO L175 Difference]: Start difference. First operand has 65 places, 42 transitions, 354 flow. Second operand 16 states and 160 transitions. [2024-11-12 08:20:26,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 139 transitions, 1073 flow [2024-11-12 08:20:26,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 139 transitions, 1001 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-12 08:20:26,314 INFO L231 Difference]: Finished difference. Result has 82 places, 60 transitions, 575 flow [2024-11-12 08:20:26,314 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=575, PETRI_PLACES=82, PETRI_TRANSITIONS=60} [2024-11-12 08:20:26,314 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 57 predicate places. [2024-11-12 08:20:26,314 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 60 transitions, 575 flow [2024-11-12 08:20:26,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.7272727272727275) internal successors, (126), 22 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:26,315 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:26,315 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:26,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 08:20:26,517 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,SelfDestructingSolverStorable13 [2024-11-12 08:20:26,518 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:26,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:26,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1451639513, now seen corresponding path program 2 times [2024-11-12 08:20:26,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:26,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644244865] [2024-11-12 08:20:26,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:26,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:27,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:27,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:27,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644244865] [2024-11-12 08:20:27,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644244865] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:27,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111598282] [2024-11-12 08:20:27,187 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:20:27,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:27,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:27,188 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:27,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 08:20:27,281 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:20:27,281 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:20:27,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-12 08:20:27,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:27,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 96 [2024-11-12 08:20:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:27,869 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:29,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:29,151 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 328 treesize of output 208 [2024-11-12 08:20:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:29,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111598282] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:29,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:29,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2024-11-12 08:20:29,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828360120] [2024-11-12 08:20:29,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:29,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 08:20:29,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:29,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 08:20:29,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-11-12 08:20:29,825 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:29,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 60 transitions, 575 flow. Second operand has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:29,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:29,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:29,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:31,420 INFO L124 PetriNetUnfolderBase]: 956/1676 cut-off events. [2024-11-12 08:20:31,420 INFO L125 PetriNetUnfolderBase]: For 5208/5208 co-relation queries the response was YES. [2024-11-12 08:20:31,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5696 conditions, 1676 events. 956/1676 cut-off events. For 5208/5208 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8579 event pairs, 280 based on Foata normal form. 5/1681 useless extension candidates. Maximal degree in co-relation 5666. Up to 663 conditions per place. [2024-11-12 08:20:31,430 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 108 selfloop transitions, 54 changer transitions 25/188 dead transitions. [2024-11-12 08:20:31,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 188 transitions, 1545 flow [2024-11-12 08:20:31,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-12 08:20:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-12 08:20:31,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 214 transitions. [2024-11-12 08:20:31,432 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3741258741258741 [2024-11-12 08:20:31,432 INFO L175 Difference]: Start difference. First operand has 82 places, 60 transitions, 575 flow. Second operand 22 states and 214 transitions. [2024-11-12 08:20:31,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 188 transitions, 1545 flow [2024-11-12 08:20:31,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 188 transitions, 1438 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-11-12 08:20:31,447 INFO L231 Difference]: Finished difference. Result has 107 places, 95 transitions, 992 flow [2024-11-12 08:20:31,447 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=992, PETRI_PLACES=107, PETRI_TRANSITIONS=95} [2024-11-12 08:20:31,447 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 82 predicate places. [2024-11-12 08:20:31,447 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 95 transitions, 992 flow [2024-11-12 08:20:31,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:31,448 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:31,448 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:31,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 08:20:31,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-12 08:20:31,652 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:31,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:31,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1037802407, now seen corresponding path program 3 times [2024-11-12 08:20:31,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:31,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359095853] [2024-11-12 08:20:31,653 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:31,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:32,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:32,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359095853] [2024-11-12 08:20:32,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359095853] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:20:32,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:20:32,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-12 08:20:32,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185036241] [2024-11-12 08:20:32,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:20:32,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 08:20:32,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:32,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 08:20:32,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-12 08:20:32,315 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:32,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 95 transitions, 992 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:32,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:32,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:32,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:32,742 INFO L124 PetriNetUnfolderBase]: 1060/1847 cut-off events. [2024-11-12 08:20:32,742 INFO L125 PetriNetUnfolderBase]: For 8812/8812 co-relation queries the response was YES. [2024-11-12 08:20:32,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6943 conditions, 1847 events. 1060/1847 cut-off events. For 8812/8812 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9769 event pairs, 548 based on Foata normal form. 1/1848 useless extension candidates. Maximal degree in co-relation 6905. Up to 1243 conditions per place. [2024-11-12 08:20:32,756 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 105 selfloop transitions, 27 changer transitions 7/140 dead transitions. [2024-11-12 08:20:32,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 140 transitions, 1524 flow [2024-11-12 08:20:32,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 08:20:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 08:20:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-11-12 08:20:32,757 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4017094017094017 [2024-11-12 08:20:32,757 INFO L175 Difference]: Start difference. First operand has 107 places, 95 transitions, 992 flow. Second operand 9 states and 94 transitions. [2024-11-12 08:20:32,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 140 transitions, 1524 flow [2024-11-12 08:20:32,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 140 transitions, 1411 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-11-12 08:20:32,786 INFO L231 Difference]: Finished difference. Result has 110 places, 106 transitions, 1092 flow [2024-11-12 08:20:32,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1092, PETRI_PLACES=110, PETRI_TRANSITIONS=106} [2024-11-12 08:20:32,787 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 85 predicate places. [2024-11-12 08:20:32,787 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 106 transitions, 1092 flow [2024-11-12 08:20:32,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:32,787 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:32,788 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:32,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-12 08:20:32,788 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:32,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:32,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1660132979, now seen corresponding path program 4 times [2024-11-12 08:20:32,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:32,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620130447] [2024-11-12 08:20:32,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:32,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:20:33,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:33,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620130447] [2024-11-12 08:20:33,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620130447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:33,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911253797] [2024-11-12 08:20:33,783 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:20:33,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:33,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:33,787 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:33,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 08:20:33,878 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:20:33,878 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:20:33,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-12 08:20:33,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:34,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 102 [2024-11-12 08:20:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:34,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:35,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:35,788 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 193 treesize of output 137 [2024-11-12 08:20:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:36,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911253797] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:36,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:36,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 24 [2024-11-12 08:20:36,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797119117] [2024-11-12 08:20:36,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:36,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-12 08:20:36,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:36,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-12 08:20:36,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2024-11-12 08:20:36,054 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:36,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 106 transitions, 1092 flow. Second operand has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:36,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:36,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:36,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:37,215 INFO L124 PetriNetUnfolderBase]: 1062/1862 cut-off events. [2024-11-12 08:20:37,215 INFO L125 PetriNetUnfolderBase]: For 9087/9087 co-relation queries the response was YES. [2024-11-12 08:20:37,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7361 conditions, 1862 events. 1062/1862 cut-off events. For 9087/9087 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9827 event pairs, 323 based on Foata normal form. 1/1863 useless extension candidates. Maximal degree in co-relation 7321. Up to 792 conditions per place. [2024-11-12 08:20:37,239 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 106 selfloop transitions, 55 changer transitions 11/173 dead transitions. [2024-11-12 08:20:37,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 173 transitions, 1740 flow [2024-11-12 08:20:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-12 08:20:37,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-12 08:20:37,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 164 transitions. [2024-11-12 08:20:37,245 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3504273504273504 [2024-11-12 08:20:37,245 INFO L175 Difference]: Start difference. First operand has 110 places, 106 transitions, 1092 flow. Second operand 18 states and 164 transitions. [2024-11-12 08:20:37,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 173 transitions, 1740 flow [2024-11-12 08:20:37,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 173 transitions, 1716 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-12 08:20:37,272 INFO L231 Difference]: Finished difference. Result has 125 places, 107 transitions, 1195 flow [2024-11-12 08:20:37,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1195, PETRI_PLACES=125, PETRI_TRANSITIONS=107} [2024-11-12 08:20:37,272 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 100 predicate places. [2024-11-12 08:20:37,273 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 107 transitions, 1195 flow [2024-11-12 08:20:37,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:37,273 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:37,273 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:37,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 08:20:37,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:37,474 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:37,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:37,475 INFO L85 PathProgramCache]: Analyzing trace with hash -777728863, now seen corresponding path program 5 times [2024-11-12 08:20:37,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:37,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415991846] [2024-11-12 08:20:37,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:37,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:38,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:38,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415991846] [2024-11-12 08:20:38,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415991846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:38,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983971607] [2024-11-12 08:20:38,170 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:20:38,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:38,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:38,173 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:38,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 08:20:38,264 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-12 08:20:38,264 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:20:38,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-12 08:20:38,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:38,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 91 [2024-11-12 08:20:38,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:38,888 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:40,127 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:40,127 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 311 treesize of output 191 [2024-11-12 08:20:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:40,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983971607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:40,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:40,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-12 08:20:40,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428036032] [2024-11-12 08:20:40,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:40,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 08:20:40,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:40,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 08:20:40,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-12 08:20:40,416 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:40,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 107 transitions, 1195 flow. Second operand has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:40,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:40,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:40,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:41,921 INFO L124 PetriNetUnfolderBase]: 1197/2096 cut-off events. [2024-11-12 08:20:41,921 INFO L125 PetriNetUnfolderBase]: For 11832/11832 co-relation queries the response was YES. [2024-11-12 08:20:41,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8551 conditions, 2096 events. 1197/2096 cut-off events. For 11832/11832 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11380 event pairs, 389 based on Foata normal form. 9/2105 useless extension candidates. Maximal degree in co-relation 8510. Up to 808 conditions per place. [2024-11-12 08:20:41,937 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 103 selfloop transitions, 60 changer transitions 25/189 dead transitions. [2024-11-12 08:20:41,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 189 transitions, 2035 flow [2024-11-12 08:20:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 08:20:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 08:20:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 163 transitions. [2024-11-12 08:20:41,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36877828054298645 [2024-11-12 08:20:41,939 INFO L175 Difference]: Start difference. First operand has 125 places, 107 transitions, 1195 flow. Second operand 17 states and 163 transitions. [2024-11-12 08:20:41,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 189 transitions, 2035 flow [2024-11-12 08:20:41,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 189 transitions, 1928 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-11-12 08:20:41,969 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 1379 flow [2024-11-12 08:20:41,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1379, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2024-11-12 08:20:41,969 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 107 predicate places. [2024-11-12 08:20:41,970 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 1379 flow [2024-11-12 08:20:41,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.681818181818182) internal successors, (125), 22 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:41,970 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:41,970 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:41,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-12 08:20:42,170 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,SelfDestructingSolverStorable17 [2024-11-12 08:20:42,171 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:42,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:42,171 INFO L85 PathProgramCache]: Analyzing trace with hash -517699671, now seen corresponding path program 6 times [2024-11-12 08:20:42,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:42,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208168798] [2024-11-12 08:20:42,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:42,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:42,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:42,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208168798] [2024-11-12 08:20:42,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208168798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:42,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713493479] [2024-11-12 08:20:42,928 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 08:20:42,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:42,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:42,930 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:42,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 08:20:43,009 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-12 08:20:43,009 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:20:43,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-12 08:20:43,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:43,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 118 [2024-11-12 08:20:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:43,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:45,078 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:45,078 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 284 treesize of output 196 [2024-11-12 08:20:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:45,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713493479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:45,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:45,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 21 [2024-11-12 08:20:45,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968795219] [2024-11-12 08:20:45,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:45,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 08:20:45,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:45,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 08:20:45,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-11-12 08:20:45,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:45,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 1379 flow. Second operand has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:45,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:45,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:45,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:47,962 INFO L124 PetriNetUnfolderBase]: 1370/2440 cut-off events. [2024-11-12 08:20:47,962 INFO L125 PetriNetUnfolderBase]: For 16743/16743 co-relation queries the response was YES. [2024-11-12 08:20:47,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10563 conditions, 2440 events. 1370/2440 cut-off events. For 16743/16743 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13789 event pairs, 464 based on Foata normal form. 13/2453 useless extension candidates. Maximal degree in co-relation 10519. Up to 1114 conditions per place. [2024-11-12 08:20:47,980 INFO L140 encePairwiseOnDemand]: 15/26 looper letters, 149 selfloop transitions, 82 changer transitions 30/262 dead transitions. [2024-11-12 08:20:47,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 262 transitions, 2847 flow [2024-11-12 08:20:47,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-12 08:20:47,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-12 08:20:47,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 253 transitions. [2024-11-12 08:20:47,982 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3892307692307692 [2024-11-12 08:20:47,982 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 1379 flow. Second operand 25 states and 253 transitions. [2024-11-12 08:20:47,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 262 transitions, 2847 flow [2024-11-12 08:20:48,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 262 transitions, 2687 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-11-12 08:20:48,040 INFO L231 Difference]: Finished difference. Result has 151 places, 147 transitions, 1915 flow [2024-11-12 08:20:48,041 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1915, PETRI_PLACES=151, PETRI_TRANSITIONS=147} [2024-11-12 08:20:48,041 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 126 predicate places. [2024-11-12 08:20:48,041 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 147 transitions, 1915 flow [2024-11-12 08:20:48,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:48,042 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:48,042 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:48,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 08:20:48,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:48,242 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:48,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:48,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1600104067, now seen corresponding path program 7 times [2024-11-12 08:20:48,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:48,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864246815] [2024-11-12 08:20:48,243 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:48,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:48,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:48,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864246815] [2024-11-12 08:20:48,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864246815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:48,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222036260] [2024-11-12 08:20:48,882 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 08:20:48,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:48,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:48,883 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:48,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 08:20:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:48,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-12 08:20:48,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:49,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 105 [2024-11-12 08:20:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:49,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:51,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:20:51,087 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 298 treesize of output 194 [2024-11-12 08:20:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:51,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222036260] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:51,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:51,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-11-12 08:20:51,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835746403] [2024-11-12 08:20:51,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:51,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 08:20:51,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:51,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 08:20:51,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2024-11-12 08:20:51,330 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:51,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 147 transitions, 1915 flow. Second operand has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:51,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:51,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:51,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:53,979 INFO L124 PetriNetUnfolderBase]: 1706/3040 cut-off events. [2024-11-12 08:20:53,982 INFO L125 PetriNetUnfolderBase]: For 25867/25867 co-relation queries the response was YES. [2024-11-12 08:20:54,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14592 conditions, 3040 events. 1706/3040 cut-off events. For 25867/25867 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 17998 event pairs, 626 based on Foata normal form. 9/3049 useless extension candidates. Maximal degree in co-relation 14544. Up to 1321 conditions per place. [2024-11-12 08:20:54,026 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 171 selfloop transitions, 103 changer transitions 23/298 dead transitions. [2024-11-12 08:20:54,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 298 transitions, 3791 flow [2024-11-12 08:20:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-12 08:20:54,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-12 08:20:54,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 228 transitions. [2024-11-12 08:20:54,027 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3986013986013986 [2024-11-12 08:20:54,027 INFO L175 Difference]: Start difference. First operand has 151 places, 147 transitions, 1915 flow. Second operand 22 states and 228 transitions. [2024-11-12 08:20:54,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 298 transitions, 3791 flow [2024-11-12 08:20:54,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 298 transitions, 3364 flow, removed 192 selfloop flow, removed 13 redundant places. [2024-11-12 08:20:54,159 INFO L231 Difference]: Finished difference. Result has 165 places, 189 transitions, 2499 flow [2024-11-12 08:20:54,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2499, PETRI_PLACES=165, PETRI_TRANSITIONS=189} [2024-11-12 08:20:54,162 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 140 predicate places. [2024-11-12 08:20:54,163 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 189 transitions, 2499 flow [2024-11-12 08:20:54,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.590909090909091) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:54,165 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:54,165 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:54,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-12 08:20:54,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:54,376 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:54,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:54,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1261059467, now seen corresponding path program 8 times [2024-11-12 08:20:54,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:54,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173779122] [2024-11-12 08:20:54,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:54,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:55,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:55,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173779122] [2024-11-12 08:20:55,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173779122] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:55,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269675114] [2024-11-12 08:20:55,206 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:20:55,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:55,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:55,209 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:55,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 08:20:55,314 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:20:55,314 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:20:55,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-12 08:20:55,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:20:55,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-12 08:20:55,360 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 [2024-11-12 08:20:55,375 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 [2024-11-12 08:20:55,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 76 [2024-11-12 08:20:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:20:55,910 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:20:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:57,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269675114] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:20:57,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:20:57,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 9] total 26 [2024-11-12 08:20:57,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32487381] [2024-11-12 08:20:57,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:20:57,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-12 08:20:57,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:20:57,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-12 08:20:57,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-11-12 08:20:57,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:20:57,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 189 transitions, 2499 flow. Second operand has 26 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:57,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:20:57,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:20:57,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:20:59,075 INFO L124 PetriNetUnfolderBase]: 1930/3469 cut-off events. [2024-11-12 08:20:59,075 INFO L125 PetriNetUnfolderBase]: For 27880/27880 co-relation queries the response was YES. [2024-11-12 08:20:59,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16685 conditions, 3469 events. 1930/3469 cut-off events. For 27880/27880 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21283 event pairs, 652 based on Foata normal form. 3/3472 useless extension candidates. Maximal degree in co-relation 16633. Up to 1089 conditions per place. [2024-11-12 08:20:59,102 INFO L140 encePairwiseOnDemand]: 14/26 looper letters, 176 selfloop transitions, 97 changer transitions 13/287 dead transitions. [2024-11-12 08:20:59,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 287 transitions, 4128 flow [2024-11-12 08:20:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 08:20:59,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 08:20:59,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 156 transitions. [2024-11-12 08:20:59,104 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2024-11-12 08:20:59,104 INFO L175 Difference]: Start difference. First operand has 165 places, 189 transitions, 2499 flow. Second operand 17 states and 156 transitions. [2024-11-12 08:20:59,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 287 transitions, 4128 flow [2024-11-12 08:20:59,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 287 transitions, 3753 flow, removed 153 selfloop flow, removed 7 redundant places. [2024-11-12 08:20:59,199 INFO L231 Difference]: Finished difference. Result has 180 places, 216 transitions, 2912 flow [2024-11-12 08:20:59,199 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2190, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2912, PETRI_PLACES=180, PETRI_TRANSITIONS=216} [2024-11-12 08:20:59,199 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 155 predicate places. [2024-11-12 08:20:59,199 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 216 transitions, 2912 flow [2024-11-12 08:20:59,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.269230769230769) internal successors, (137), 26 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:20:59,200 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:20:59,200 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:20:59,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-12 08:20:59,400 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,SelfDestructingSolverStorable20 [2024-11-12 08:20:59,401 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:20:59,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:20:59,401 INFO L85 PathProgramCache]: Analyzing trace with hash -117806081, now seen corresponding path program 9 times [2024-11-12 08:20:59,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:20:59,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954337158] [2024-11-12 08:20:59,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:20:59,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:20:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:20:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:20:59,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:20:59,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954337158] [2024-11-12 08:20:59,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954337158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:20:59,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338761808] [2024-11-12 08:20:59,957 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:20:59,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:20:59,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:20:59,959 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:20:59,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 08:21:00,054 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:21:00,054 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:00,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-12 08:21:00,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:00,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 131 [2024-11-12 08:21:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:00,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:01,788 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:21:01,789 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 317 treesize of output 213 [2024-11-12 08:21:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:02,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338761808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:02,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:02,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2024-11-12 08:21:02,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660005151] [2024-11-12 08:21:02,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:02,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 08:21:02,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:02,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 08:21:02,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-11-12 08:21:02,025 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:02,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 216 transitions, 2912 flow. Second operand has 20 states, 20 states have (on average 5.8) internal successors, (116), 20 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:02,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:02,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:02,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:05,356 INFO L124 PetriNetUnfolderBase]: 2092/3802 cut-off events. [2024-11-12 08:21:05,356 INFO L125 PetriNetUnfolderBase]: For 32883/32883 co-relation queries the response was YES. [2024-11-12 08:21:05,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19079 conditions, 3802 events. 2092/3802 cut-off events. For 32883/32883 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23934 event pairs, 852 based on Foata normal form. 10/3812 useless extension candidates. Maximal degree in co-relation 19022. Up to 1906 conditions per place. [2024-11-12 08:21:05,389 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 240 selfloop transitions, 112 changer transitions 27/380 dead transitions. [2024-11-12 08:21:05,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 380 transitions, 5111 flow [2024-11-12 08:21:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-12 08:21:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-12 08:21:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 278 transitions. [2024-11-12 08:21:05,391 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.396011396011396 [2024-11-12 08:21:05,391 INFO L175 Difference]: Start difference. First operand has 180 places, 216 transitions, 2912 flow. Second operand 27 states and 278 transitions. [2024-11-12 08:21:05,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 380 transitions, 5111 flow [2024-11-12 08:21:05,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 380 transitions, 4945 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-11-12 08:21:05,533 INFO L231 Difference]: Finished difference. Result has 211 places, 247 transitions, 3644 flow [2024-11-12 08:21:05,533 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3644, PETRI_PLACES=211, PETRI_TRANSITIONS=247} [2024-11-12 08:21:05,534 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 186 predicate places. [2024-11-12 08:21:05,534 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 247 transitions, 3644 flow [2024-11-12 08:21:05,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.8) internal successors, (116), 20 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:05,534 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:05,534 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:05,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-12 08:21:05,738 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,SelfDestructingSolverStorable21 [2024-11-12 08:21:05,739 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:05,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash -497032918, now seen corresponding path program 10 times [2024-11-12 08:21:05,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:05,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101907721] [2024-11-12 08:21:05,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:05,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:05,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:06,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:06,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:06,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101907721] [2024-11-12 08:21:06,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101907721] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:06,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709328645] [2024-11-12 08:21:06,071 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:21:06,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:06,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:06,072 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:06,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 08:21:06,163 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:21:06,163 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:06,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-12 08:21:06,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:06,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:06,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:06,464 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 08:21:06,464 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 40 treesize of output 19 [2024-11-12 08:21:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:06,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709328645] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:06,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:06,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 17 [2024-11-12 08:21:06,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651366760] [2024-11-12 08:21:06,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:06,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 08:21:06,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:06,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 08:21:06,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-11-12 08:21:06,495 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:06,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 247 transitions, 3644 flow. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 17 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:06,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:06,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:06,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:07,626 INFO L124 PetriNetUnfolderBase]: 2153/3899 cut-off events. [2024-11-12 08:21:07,626 INFO L125 PetriNetUnfolderBase]: For 38917/38917 co-relation queries the response was YES. [2024-11-12 08:21:07,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20315 conditions, 3899 events. 2153/3899 cut-off events. For 38917/38917 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 24574 event pairs, 308 based on Foata normal form. 12/3911 useless extension candidates. Maximal degree in co-relation 20248. Up to 843 conditions per place. [2024-11-12 08:21:07,663 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 195 selfloop transitions, 147 changer transitions 10/353 dead transitions. [2024-11-12 08:21:07,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 353 transitions, 5296 flow [2024-11-12 08:21:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-12 08:21:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-12 08:21:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 194 transitions. [2024-11-12 08:21:07,664 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3553113553113553 [2024-11-12 08:21:07,664 INFO L175 Difference]: Start difference. First operand has 211 places, 247 transitions, 3644 flow. Second operand 21 states and 194 transitions. [2024-11-12 08:21:07,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 353 transitions, 5296 flow [2024-11-12 08:21:07,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 353 transitions, 4974 flow, removed 158 selfloop flow, removed 4 redundant places. [2024-11-12 08:21:07,911 INFO L231 Difference]: Finished difference. Result has 228 places, 268 transitions, 4101 flow [2024-11-12 08:21:07,911 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3356, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4101, PETRI_PLACES=228, PETRI_TRANSITIONS=268} [2024-11-12 08:21:07,912 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 203 predicate places. [2024-11-12 08:21:07,912 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 268 transitions, 4101 flow [2024-11-12 08:21:07,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 17 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:07,912 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:07,912 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:07,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-12 08:21:08,116 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,SelfDestructingSolverStorable22 [2024-11-12 08:21:08,117 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:08,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash -259960230, now seen corresponding path program 11 times [2024-11-12 08:21:08,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:08,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504507266] [2024-11-12 08:21:08,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:08,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:08,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:08,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504507266] [2024-11-12 08:21:08,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504507266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:08,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159081981] [2024-11-12 08:21:08,442 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:21:08,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:08,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:08,444 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:08,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 08:21:08,536 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-12 08:21:08,536 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:08,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 08:21:08,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:08,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2024-11-12 08:21:08,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:08,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:08,874 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 08:21:08,875 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 109 treesize of output 56 [2024-11-12 08:21:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:08,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159081981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:08,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:08,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-12 08:21:08,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353076416] [2024-11-12 08:21:08,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:08,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 08:21:08,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:08,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 08:21:08,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2024-11-12 08:21:08,926 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:08,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 268 transitions, 4101 flow. Second operand has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:08,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:08,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:08,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:09,836 INFO L124 PetriNetUnfolderBase]: 2201/3993 cut-off events. [2024-11-12 08:21:09,836 INFO L125 PetriNetUnfolderBase]: For 42542/42542 co-relation queries the response was YES. [2024-11-12 08:21:09,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20958 conditions, 3993 events. 2201/3993 cut-off events. For 42542/42542 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 25651 event pairs, 913 based on Foata normal form. 8/4001 useless extension candidates. Maximal degree in co-relation 20890. Up to 1738 conditions per place. [2024-11-12 08:21:09,878 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 260 selfloop transitions, 76 changer transitions 4/341 dead transitions. [2024-11-12 08:21:09,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 341 transitions, 5389 flow [2024-11-12 08:21:09,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 08:21:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 08:21:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-11-12 08:21:09,880 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-11-12 08:21:09,880 INFO L175 Difference]: Start difference. First operand has 228 places, 268 transitions, 4101 flow. Second operand 10 states and 115 transitions. [2024-11-12 08:21:09,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 341 transitions, 5389 flow [2024-11-12 08:21:10,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 341 transitions, 5002 flow, removed 96 selfloop flow, removed 11 redundant places. [2024-11-12 08:21:10,193 INFO L231 Difference]: Finished difference. Result has 229 places, 271 transitions, 3984 flow [2024-11-12 08:21:10,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3746, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3984, PETRI_PLACES=229, PETRI_TRANSITIONS=271} [2024-11-12 08:21:10,194 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 204 predicate places. [2024-11-12 08:21:10,194 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 271 transitions, 3984 flow [2024-11-12 08:21:10,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.571428571428571) internal successors, (117), 21 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:10,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:10,194 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:10,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-12 08:21:10,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:10,399 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:10,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:10,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2021623830, now seen corresponding path program 12 times [2024-11-12 08:21:10,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:10,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122758571] [2024-11-12 08:21:10,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:10,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:10,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:10,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122758571] [2024-11-12 08:21:10,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122758571] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:10,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673210809] [2024-11-12 08:21:10,942 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 08:21:10,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:10,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:10,943 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:10,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 08:21:11,044 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-12 08:21:11,045 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:11,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-12 08:21:11,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:11,383 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:11,665 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 08:21:11,665 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 40 treesize of output 19 [2024-11-12 08:21:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:11,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673210809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:11,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:11,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-11-12 08:21:11,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144947664] [2024-11-12 08:21:11,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:11,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 08:21:11,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:11,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 08:21:11,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-11-12 08:21:11,683 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:11,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 271 transitions, 3984 flow. Second operand has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:11,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:11,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:11,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:12,891 INFO L124 PetriNetUnfolderBase]: 2199/4003 cut-off events. [2024-11-12 08:21:12,892 INFO L125 PetriNetUnfolderBase]: For 34760/34760 co-relation queries the response was YES. [2024-11-12 08:21:12,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21225 conditions, 4003 events. 2199/4003 cut-off events. For 34760/34760 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 25667 event pairs, 344 based on Foata normal form. 24/4027 useless extension candidates. Maximal degree in co-relation 21158. Up to 1270 conditions per place. [2024-11-12 08:21:12,940 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 225 selfloop transitions, 143 changer transitions 8/377 dead transitions. [2024-11-12 08:21:12,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 377 transitions, 5552 flow [2024-11-12 08:21:12,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 08:21:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 08:21:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 194 transitions. [2024-11-12 08:21:12,942 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43891402714932126 [2024-11-12 08:21:12,942 INFO L175 Difference]: Start difference. First operand has 229 places, 271 transitions, 3984 flow. Second operand 17 states and 194 transitions. [2024-11-12 08:21:12,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 377 transitions, 5552 flow [2024-11-12 08:21:13,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 377 transitions, 5492 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-12 08:21:13,146 INFO L231 Difference]: Finished difference. Result has 244 places, 286 transitions, 4532 flow [2024-11-12 08:21:13,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4532, PETRI_PLACES=244, PETRI_TRANSITIONS=286} [2024-11-12 08:21:13,147 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 219 predicate places. [2024-11-12 08:21:13,147 INFO L471 AbstractCegarLoop]: Abstraction has has 244 places, 286 transitions, 4532 flow [2024-11-12 08:21:13,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:13,147 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:13,147 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:13,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-12 08:21:13,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:13,348 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:13,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash -897504608, now seen corresponding path program 13 times [2024-11-12 08:21:13,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:13,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741218094] [2024-11-12 08:21:13,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:13,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:13,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:13,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741218094] [2024-11-12 08:21:13,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741218094] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:13,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198009163] [2024-11-12 08:21:13,713 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 08:21:13,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:13,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:13,714 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:13,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-12 08:21:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:13,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 08:21:13,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:13,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2024-11-12 08:21:13,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:13,995 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:14,097 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 08:21:14,098 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 109 treesize of output 56 [2024-11-12 08:21:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:14,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198009163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:14,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:14,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-12 08:21:14,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124996039] [2024-11-12 08:21:14,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:14,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 08:21:14,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:14,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 08:21:14,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-11-12 08:21:14,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:14,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 286 transitions, 4532 flow. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:14,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:14,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:14,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:15,084 INFO L124 PetriNetUnfolderBase]: 2188/3977 cut-off events. [2024-11-12 08:21:15,084 INFO L125 PetriNetUnfolderBase]: For 39435/39435 co-relation queries the response was YES. [2024-11-12 08:21:15,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21743 conditions, 3977 events. 2188/3977 cut-off events. For 39435/39435 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 25504 event pairs, 1011 based on Foata normal form. 3/3980 useless extension candidates. Maximal degree in co-relation 21672. Up to 1981 conditions per place. [2024-11-12 08:21:15,126 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 249 selfloop transitions, 73 changer transitions 8/331 dead transitions. [2024-11-12 08:21:15,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 331 transitions, 5460 flow [2024-11-12 08:21:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 08:21:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 08:21:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-11-12 08:21:15,127 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2024-11-12 08:21:15,127 INFO L175 Difference]: Start difference. First operand has 244 places, 286 transitions, 4532 flow. Second operand 10 states and 110 transitions. [2024-11-12 08:21:15,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 331 transitions, 5460 flow [2024-11-12 08:21:15,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 331 transitions, 5192 flow, removed 48 selfloop flow, removed 12 redundant places. [2024-11-12 08:21:15,437 INFO L231 Difference]: Finished difference. Result has 241 places, 284 transitions, 4377 flow [2024-11-12 08:21:15,437 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4246, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4377, PETRI_PLACES=241, PETRI_TRANSITIONS=284} [2024-11-12 08:21:15,438 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 216 predicate places. [2024-11-12 08:21:15,438 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 284 transitions, 4377 flow [2024-11-12 08:21:15,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:15,438 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:15,438 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:15,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-12 08:21:15,638 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,SelfDestructingSolverStorable25 [2024-11-12 08:21:15,639 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:15,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:15,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1169538598, now seen corresponding path program 14 times [2024-11-12 08:21:15,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:15,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086616679] [2024-11-12 08:21:15,639 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:15,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:15,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:15,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086616679] [2024-11-12 08:21:15,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086616679] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:15,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666850163] [2024-11-12 08:21:15,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 08:21:15,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:15,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:15,949 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:15,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-12 08:21:16,039 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 08:21:16,039 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:16,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-12 08:21:16,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:16,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2024-11-12 08:21:16,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:16,288 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:16,433 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:21:16,433 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 44 treesize of output 28 [2024-11-12 08:21:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:16,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666850163] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:16,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:16,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2024-11-12 08:21:16,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963928052] [2024-11-12 08:21:16,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:16,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 08:21:16,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:16,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 08:21:16,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-11-12 08:21:16,466 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:16,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 284 transitions, 4377 flow. Second operand has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:16,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:16,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:16,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:18,240 INFO L124 PetriNetUnfolderBase]: 2497/4472 cut-off events. [2024-11-12 08:21:18,241 INFO L125 PetriNetUnfolderBase]: For 42920/42920 co-relation queries the response was YES. [2024-11-12 08:21:18,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24582 conditions, 4472 events. 2497/4472 cut-off events. For 42920/42920 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 28741 event pairs, 340 based on Foata normal form. 9/4481 useless extension candidates. Maximal degree in co-relation 24514. Up to 1014 conditions per place. [2024-11-12 08:21:18,286 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 261 selfloop transitions, 188 changer transitions 21/471 dead transitions. [2024-11-12 08:21:18,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 471 transitions, 6930 flow [2024-11-12 08:21:18,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-12 08:21:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-12 08:21:18,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 323 transitions. [2024-11-12 08:21:18,288 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35494505494505496 [2024-11-12 08:21:18,288 INFO L175 Difference]: Start difference. First operand has 241 places, 284 transitions, 4377 flow. Second operand 35 states and 323 transitions. [2024-11-12 08:21:18,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 471 transitions, 6930 flow [2024-11-12 08:21:18,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 471 transitions, 6714 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-11-12 08:21:18,529 INFO L231 Difference]: Finished difference. Result has 279 places, 331 transitions, 5532 flow [2024-11-12 08:21:18,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4181, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5532, PETRI_PLACES=279, PETRI_TRANSITIONS=331} [2024-11-12 08:21:18,530 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 254 predicate places. [2024-11-12 08:21:18,530 INFO L471 AbstractCegarLoop]: Abstraction has has 279 places, 331 transitions, 5532 flow [2024-11-12 08:21:18,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.7) internal successors, (114), 20 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:18,530 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:18,531 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:18,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-12 08:21:18,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-12 08:21:18,735 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:18,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:18,735 INFO L85 PathProgramCache]: Analyzing trace with hash -425239836, now seen corresponding path program 15 times [2024-11-12 08:21:18,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:18,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101031324] [2024-11-12 08:21:18,735 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:18,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:19,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:19,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:19,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101031324] [2024-11-12 08:21:19,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101031324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:19,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30104876] [2024-11-12 08:21:19,066 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:21:19,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:19,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:19,068 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:19,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-12 08:21:19,162 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:21:19,163 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:19,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-12 08:21:19,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:19,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2024-11-12 08:21:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:19,329 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:19,423 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 08:21:19,424 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 79 treesize of output 42 [2024-11-12 08:21:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:19,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30104876] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:19,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:19,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 17 [2024-11-12 08:21:19,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395914132] [2024-11-12 08:21:19,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:19,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 08:21:19,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 08:21:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-12 08:21:19,445 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:19,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 331 transitions, 5532 flow. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:19,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:19,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:19,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:20,313 INFO L124 PetriNetUnfolderBase]: 2384/4335 cut-off events. [2024-11-12 08:21:20,314 INFO L125 PetriNetUnfolderBase]: For 72219/72219 co-relation queries the response was YES. [2024-11-12 08:21:20,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30069 conditions, 4335 events. 2384/4335 cut-off events. For 72219/72219 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 28364 event pairs, 1109 based on Foata normal form. 3/4338 useless extension candidates. Maximal degree in co-relation 29987. Up to 2379 conditions per place. [2024-11-12 08:21:20,361 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 277 selfloop transitions, 72 changer transitions 11/361 dead transitions. [2024-11-12 08:21:20,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 361 transitions, 6515 flow [2024-11-12 08:21:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 08:21:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 08:21:20,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-11-12 08:21:20,363 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3803418803418803 [2024-11-12 08:21:20,363 INFO L175 Difference]: Start difference. First operand has 279 places, 331 transitions, 5532 flow. Second operand 9 states and 89 transitions. [2024-11-12 08:21:20,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 361 transitions, 6515 flow [2024-11-12 08:21:20,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 361 transitions, 6148 flow, removed 72 selfloop flow, removed 17 redundant places. [2024-11-12 08:21:20,779 INFO L231 Difference]: Finished difference. Result has 271 places, 329 transitions, 5295 flow [2024-11-12 08:21:20,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5295, PETRI_PLACES=271, PETRI_TRANSITIONS=329} [2024-11-12 08:21:20,780 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 246 predicate places. [2024-11-12 08:21:20,780 INFO L471 AbstractCegarLoop]: Abstraction has has 271 places, 329 transitions, 5295 flow [2024-11-12 08:21:20,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:20,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:20,781 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:20,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-12 08:21:20,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-12 08:21:20,982 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:20,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:20,983 INFO L85 PathProgramCache]: Analyzing trace with hash -216452482, now seen corresponding path program 16 times [2024-11-12 08:21:20,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:20,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549546342] [2024-11-12 08:21:20,983 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:20,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:21,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:21,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549546342] [2024-11-12 08:21:21,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549546342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:21,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281648412] [2024-11-12 08:21:21,589 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 08:21:21,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:21,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:21,591 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:21,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-12 08:21:21,683 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 08:21:21,684 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:21,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-12 08:21:21,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:21,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 50 [2024-11-12 08:21:21,809 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:21,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:21,961 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 08:21:21,961 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 109 treesize of output 56 [2024-11-12 08:21:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:21,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281648412] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:21,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:21,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 18 [2024-11-12 08:21:21,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009314428] [2024-11-12 08:21:21,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:21,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 08:21:21,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 08:21:21,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-12 08:21:21,993 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:21,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 329 transitions, 5295 flow. Second operand has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 18 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:21,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:21,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:21,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:22,946 INFO L124 PetriNetUnfolderBase]: 2362/4283 cut-off events. [2024-11-12 08:21:22,947 INFO L125 PetriNetUnfolderBase]: For 67394/67394 co-relation queries the response was YES. [2024-11-12 08:21:22,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29080 conditions, 4283 events. 2362/4283 cut-off events. For 67394/67394 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 27840 event pairs, 1080 based on Foata normal form. 3/4286 useless extension candidates. Maximal degree in co-relation 28998. Up to 2379 conditions per place. [2024-11-12 08:21:22,992 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 264 selfloop transitions, 81 changer transitions 11/357 dead transitions. [2024-11-12 08:21:22,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 357 transitions, 6245 flow [2024-11-12 08:21:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 08:21:22,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 08:21:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-11-12 08:21:22,994 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3803418803418803 [2024-11-12 08:21:22,994 INFO L175 Difference]: Start difference. First operand has 271 places, 329 transitions, 5295 flow. Second operand 9 states and 89 transitions. [2024-11-12 08:21:22,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 357 transitions, 6245 flow [2024-11-12 08:21:23,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 357 transitions, 6097 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-12 08:21:23,453 INFO L231 Difference]: Finished difference. Result has 271 places, 325 transitions, 5248 flow [2024-11-12 08:21:23,453 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5133, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5248, PETRI_PLACES=271, PETRI_TRANSITIONS=325} [2024-11-12 08:21:23,454 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 246 predicate places. [2024-11-12 08:21:23,454 INFO L471 AbstractCegarLoop]: Abstraction has has 271 places, 325 transitions, 5248 flow [2024-11-12 08:21:23,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.888888888888889) internal successors, (106), 18 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:23,455 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:23,455 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:23,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-12 08:21:23,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-12 08:21:23,656 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:23,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2080079788, now seen corresponding path program 17 times [2024-11-12 08:21:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928086977] [2024-11-12 08:21:23,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:23,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:23,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:23,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928086977] [2024-11-12 08:21:23,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928086977] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:23,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075318299] [2024-11-12 08:21:23,980 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:21:23,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:23,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:23,981 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:23,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-12 08:21:24,076 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-12 08:21:24,076 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:24,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 08:21:24,078 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:24,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2024-11-12 08:21:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:24,208 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:24,305 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-12 08:21:24,306 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 40 treesize of output 19 [2024-11-12 08:21:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:24,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075318299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:24,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:24,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-12 08:21:24,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727866964] [2024-11-12 08:21:24,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:24,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 08:21:24,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:24,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 08:21:24,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-11-12 08:21:24,334 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:24,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 325 transitions, 5248 flow. Second operand has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:24,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:24,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:24,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:25,436 INFO L124 PetriNetUnfolderBase]: 2342/4224 cut-off events. [2024-11-12 08:21:25,440 INFO L125 PetriNetUnfolderBase]: For 68080/68080 co-relation queries the response was YES. [2024-11-12 08:21:25,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28818 conditions, 4224 events. 2342/4224 cut-off events. For 68080/68080 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 27255 event pairs, 383 based on Foata normal form. 2/4226 useless extension candidates. Maximal degree in co-relation 28736. Up to 1334 conditions per place. [2024-11-12 08:21:25,480 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 264 selfloop transitions, 129 changer transitions 11/405 dead transitions. [2024-11-12 08:21:25,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 405 transitions, 6823 flow [2024-11-12 08:21:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-12 08:21:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-12 08:21:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 161 transitions. [2024-11-12 08:21:25,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3870192307692308 [2024-11-12 08:21:25,484 INFO L175 Difference]: Start difference. First operand has 271 places, 325 transitions, 5248 flow. Second operand 16 states and 161 transitions. [2024-11-12 08:21:25,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 405 transitions, 6823 flow [2024-11-12 08:21:25,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 405 transitions, 6584 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-11-12 08:21:25,750 INFO L231 Difference]: Finished difference. Result has 268 places, 322 transitions, 5273 flow [2024-11-12 08:21:25,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4996, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5273, PETRI_PLACES=268, PETRI_TRANSITIONS=322} [2024-11-12 08:21:25,752 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 243 predicate places. [2024-11-12 08:21:25,753 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 322 transitions, 5273 flow [2024-11-12 08:21:25,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.428571428571429) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:25,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:25,753 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:25,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-12 08:21:25,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:25,958 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:25,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:25,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1145634044, now seen corresponding path program 18 times [2024-11-12 08:21:25,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:25,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775312429] [2024-11-12 08:21:25,959 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:25,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:25,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:26,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:26,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:26,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775312429] [2024-11-12 08:21:26,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775312429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:26,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801537198] [2024-11-12 08:21:26,282 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 08:21:26,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:26,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:26,283 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:26,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-12 08:21:26,382 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-12 08:21:26,382 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:26,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-12 08:21:26,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:26,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:26,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:21:26,754 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 54 treesize of output 30 [2024-11-12 08:21:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:26,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801537198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:26,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:26,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2024-11-12 08:21:26,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400053602] [2024-11-12 08:21:26,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:26,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 08:21:26,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:26,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 08:21:26,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-11-12 08:21:26,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:26,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 322 transitions, 5273 flow. Second operand has 20 states, 20 states have (on average 5.65) internal successors, (113), 20 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) [2024-11-12 08:21:26,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:26,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:26,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:27,828 INFO L124 PetriNetUnfolderBase]: 2359/4256 cut-off events. [2024-11-12 08:21:27,828 INFO L125 PetriNetUnfolderBase]: For 63169/63169 co-relation queries the response was YES. [2024-11-12 08:21:27,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28482 conditions, 4256 events. 2359/4256 cut-off events. For 63169/63169 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 27489 event pairs, 1286 based on Foata normal form. 16/4272 useless extension candidates. Maximal degree in co-relation 28404. Up to 3336 conditions per place. [2024-11-12 08:21:27,864 INFO L140 encePairwiseOnDemand]: 16/26 looper letters, 262 selfloop transitions, 101 changer transitions 3/367 dead transitions. [2024-11-12 08:21:27,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 367 transitions, 6491 flow [2024-11-12 08:21:27,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 08:21:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-12 08:21:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 123 transitions. [2024-11-12 08:21:27,865 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33791208791208793 [2024-11-12 08:21:27,865 INFO L175 Difference]: Start difference. First operand has 268 places, 322 transitions, 5273 flow. Second operand 14 states and 123 transitions. [2024-11-12 08:21:27,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 367 transitions, 6491 flow [2024-11-12 08:21:28,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 367 transitions, 6196 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-11-12 08:21:28,169 INFO L231 Difference]: Finished difference. Result has 268 places, 330 transitions, 5407 flow [2024-11-12 08:21:28,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=4971, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5407, PETRI_PLACES=268, PETRI_TRANSITIONS=330} [2024-11-12 08:21:28,170 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 243 predicate places. [2024-11-12 08:21:28,170 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 330 transitions, 5407 flow [2024-11-12 08:21:28,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.65) internal successors, (113), 20 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) [2024-11-12 08:21:28,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:28,171 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:28,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-12 08:21:28,371 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:28,372 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:28,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:28,372 INFO L85 PathProgramCache]: Analyzing trace with hash 942527528, now seen corresponding path program 19 times [2024-11-12 08:21:28,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:28,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515487134] [2024-11-12 08:21:28,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:28,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 08:21:29,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:29,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515487134] [2024-11-12 08:21:29,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515487134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:29,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316342570] [2024-11-12 08:21:29,042 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 08:21:29,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:29,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:29,044 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:29,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-12 08:21:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:29,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-12 08:21:29,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:29,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:29,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:21:29,697 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 51 treesize of output 27 [2024-11-12 08:21:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:29,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316342570] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:29,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:29,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2024-11-12 08:21:29,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46878892] [2024-11-12 08:21:29,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:29,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-12 08:21:29,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:29,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-12 08:21:29,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-11-12 08:21:29,788 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:29,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 330 transitions, 5407 flow. Second operand has 23 states, 23 states have (on average 5.695652173913044) internal successors, (131), 23 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:29,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:29,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:29,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:31,374 INFO L124 PetriNetUnfolderBase]: 2407/4352 cut-off events. [2024-11-12 08:21:31,375 INFO L125 PetriNetUnfolderBase]: For 70725/70725 co-relation queries the response was YES. [2024-11-12 08:21:31,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29822 conditions, 4352 events. 2407/4352 cut-off events. For 70725/70725 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 28332 event pairs, 1066 based on Foata normal form. 21/4373 useless extension candidates. Maximal degree in co-relation 29741. Up to 2818 conditions per place. [2024-11-12 08:21:31,427 INFO L140 encePairwiseOnDemand]: 17/26 looper letters, 251 selfloop transitions, 143 changer transitions 7/402 dead transitions. [2024-11-12 08:21:31,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 402 transitions, 7005 flow [2024-11-12 08:21:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-12 08:21:31,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-12 08:21:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 168 transitions. [2024-11-12 08:21:31,429 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38009049773755654 [2024-11-12 08:21:31,429 INFO L175 Difference]: Start difference. First operand has 268 places, 330 transitions, 5407 flow. Second operand 17 states and 168 transitions. [2024-11-12 08:21:31,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 402 transitions, 7005 flow [2024-11-12 08:21:31,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 402 transitions, 6876 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-11-12 08:21:31,802 INFO L231 Difference]: Finished difference. Result has 282 places, 336 transitions, 5955 flow [2024-11-12 08:21:31,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5275, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5955, PETRI_PLACES=282, PETRI_TRANSITIONS=336} [2024-11-12 08:21:31,803 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 257 predicate places. [2024-11-12 08:21:31,803 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 336 transitions, 5955 flow [2024-11-12 08:21:31,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.695652173913044) internal successors, (131), 23 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:31,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:31,804 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:31,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-12 08:21:32,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:32,004 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:32,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:32,005 INFO L85 PathProgramCache]: Analyzing trace with hash -426781430, now seen corresponding path program 20 times [2024-11-12 08:21:32,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:32,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468591026] [2024-11-12 08:21:32,005 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:32,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:32,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468591026] [2024-11-12 08:21:32,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468591026] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:21:32,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:21:32,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-12 08:21:32,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333553577] [2024-11-12 08:21:32,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:21:32,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-12 08:21:32,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:32,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-12 08:21:32,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-12 08:21:32,352 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:32,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 336 transitions, 5955 flow. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:32,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:32,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:32,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:33,319 INFO L124 PetriNetUnfolderBase]: 2718/4888 cut-off events. [2024-11-12 08:21:33,319 INFO L125 PetriNetUnfolderBase]: For 90101/90101 co-relation queries the response was YES. [2024-11-12 08:21:33,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34651 conditions, 4888 events. 2718/4888 cut-off events. For 90101/90101 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32519 event pairs, 1459 based on Foata normal form. 18/4906 useless extension candidates. Maximal degree in co-relation 34565. Up to 3689 conditions per place. [2024-11-12 08:21:33,369 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 322 selfloop transitions, 76 changer transitions 5/404 dead transitions. [2024-11-12 08:21:33,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 404 transitions, 7821 flow [2024-11-12 08:21:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 08:21:33,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 08:21:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-11-12 08:21:33,370 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38076923076923075 [2024-11-12 08:21:33,370 INFO L175 Difference]: Start difference. First operand has 282 places, 336 transitions, 5955 flow. Second operand 10 states and 99 transitions. [2024-11-12 08:21:33,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 404 transitions, 7821 flow [2024-11-12 08:21:33,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 404 transitions, 7603 flow, removed 47 selfloop flow, removed 11 redundant places. [2024-11-12 08:21:33,847 INFO L231 Difference]: Finished difference. Result has 282 places, 358 transitions, 6471 flow [2024-11-12 08:21:33,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=5813, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6471, PETRI_PLACES=282, PETRI_TRANSITIONS=358} [2024-11-12 08:21:33,848 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 257 predicate places. [2024-11-12 08:21:33,848 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 358 transitions, 6471 flow [2024-11-12 08:21:33,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:33,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:33,849 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:33,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-12 08:21:33,849 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:33,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:33,849 INFO L85 PathProgramCache]: Analyzing trace with hash -434390360, now seen corresponding path program 21 times [2024-11-12 08:21:33,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:33,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112096869] [2024-11-12 08:21:33,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:33,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:34,070 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:34,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:34,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112096869] [2024-11-12 08:21:34,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112096869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:34,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482114460] [2024-11-12 08:21:34,070 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 08:21:34,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:34,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:34,072 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:34,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-12 08:21:34,167 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 08:21:34,167 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:34,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 08:21:34,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:34,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 70 [2024-11-12 08:21:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:34,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:34,586 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:21:34,587 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 95 treesize of output 55 [2024-11-12 08:21:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:34,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482114460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:34,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:34,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-11-12 08:21:34,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420193424] [2024-11-12 08:21:34,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:34,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 08:21:34,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:34,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 08:21:34,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-11-12 08:21:34,667 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:34,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 358 transitions, 6471 flow. Second operand has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:34,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:34,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:34,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:35,999 INFO L124 PetriNetUnfolderBase]: 2761/4970 cut-off events. [2024-11-12 08:21:35,999 INFO L125 PetriNetUnfolderBase]: For 92362/92362 co-relation queries the response was YES. [2024-11-12 08:21:36,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35518 conditions, 4970 events. 2761/4970 cut-off events. For 92362/92362 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 33128 event pairs, 1128 based on Foata normal form. 9/4979 useless extension candidates. Maximal degree in co-relation 35431. Up to 2683 conditions per place. [2024-11-12 08:21:36,048 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 249 selfloop transitions, 169 changer transitions 5/424 dead transitions. [2024-11-12 08:21:36,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 424 transitions, 8118 flow [2024-11-12 08:21:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 08:21:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-12 08:21:36,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 142 transitions. [2024-11-12 08:21:36,050 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3901098901098901 [2024-11-12 08:21:36,051 INFO L175 Difference]: Start difference. First operand has 282 places, 358 transitions, 6471 flow. Second operand 14 states and 142 transitions. [2024-11-12 08:21:36,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 424 transitions, 8118 flow [2024-11-12 08:21:36,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 424 transitions, 8012 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-11-12 08:21:36,544 INFO L231 Difference]: Finished difference. Result has 292 places, 362 transitions, 6867 flow [2024-11-12 08:21:36,545 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6365, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6867, PETRI_PLACES=292, PETRI_TRANSITIONS=362} [2024-11-12 08:21:36,545 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 267 predicate places. [2024-11-12 08:21:36,545 INFO L471 AbstractCegarLoop]: Abstraction has has 292 places, 362 transitions, 6867 flow [2024-11-12 08:21:36,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.166666666666667) internal successors, (111), 18 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:36,546 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:36,546 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:36,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-12 08:21:36,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:36,749 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:36,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:36,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1394489622, now seen corresponding path program 22 times [2024-11-12 08:21:36,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:36,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417340988] [2024-11-12 08:21:36,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:36,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:37,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:37,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417340988] [2024-11-12 08:21:37,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417340988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 08:21:37,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 08:21:37,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-12 08:21:37,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810785802] [2024-11-12 08:21:37,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 08:21:37,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-12 08:21:37,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:37,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-12 08:21:37,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-12 08:21:37,021 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:37,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 362 transitions, 6867 flow. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:37,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:37,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:37,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:37,968 INFO L124 PetriNetUnfolderBase]: 2760/4954 cut-off events. [2024-11-12 08:21:37,968 INFO L125 PetriNetUnfolderBase]: For 97055/97055 co-relation queries the response was YES. [2024-11-12 08:21:38,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36173 conditions, 4954 events. 2760/4954 cut-off events. For 97055/97055 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33022 event pairs, 1651 based on Foata normal form. 20/4974 useless extension candidates. Maximal degree in co-relation 36084. Up to 4197 conditions per place. [2024-11-12 08:21:38,019 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 318 selfloop transitions, 56 changer transitions 4/379 dead transitions. [2024-11-12 08:21:38,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 379 transitions, 7769 flow [2024-11-12 08:21:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 08:21:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 08:21:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2024-11-12 08:21:38,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36324786324786323 [2024-11-12 08:21:38,021 INFO L175 Difference]: Start difference. First operand has 292 places, 362 transitions, 6867 flow. Second operand 9 states and 85 transitions. [2024-11-12 08:21:38,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 379 transitions, 7769 flow [2024-11-12 08:21:38,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 379 transitions, 7435 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-11-12 08:21:38,551 INFO L231 Difference]: Finished difference. Result has 289 places, 356 transitions, 6571 flow [2024-11-12 08:21:38,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6398, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6571, PETRI_PLACES=289, PETRI_TRANSITIONS=356} [2024-11-12 08:21:38,552 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 264 predicate places. [2024-11-12 08:21:38,552 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 356 transitions, 6571 flow [2024-11-12 08:21:38,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:38,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:38,552 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:38,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-12 08:21:38,553 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:38,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:38,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1386880692, now seen corresponding path program 23 times [2024-11-12 08:21:38,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:38,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690492432] [2024-11-12 08:21:38,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:38,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:38,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:38,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690492432] [2024-11-12 08:21:38,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690492432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:38,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615986960] [2024-11-12 08:21:38,845 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 08:21:38,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:38,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:38,847 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:38,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-12 08:21:38,954 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-12 08:21:38,955 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:38,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-12 08:21:38,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:39,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2024-11-12 08:21:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:39,089 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:39,182 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:21:39,182 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 51 treesize of output 27 [2024-11-12 08:21:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:39,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615986960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:39,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:39,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-12 08:21:39,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202637608] [2024-11-12 08:21:39,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:39,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 08:21:39,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:39,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 08:21:39,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-11-12 08:21:39,221 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:39,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 356 transitions, 6571 flow. Second operand has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:39,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:39,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:39,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:40,612 INFO L124 PetriNetUnfolderBase]: 2848/5120 cut-off events. [2024-11-12 08:21:40,613 INFO L125 PetriNetUnfolderBase]: For 98789/98789 co-relation queries the response was YES. [2024-11-12 08:21:40,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36722 conditions, 5120 events. 2848/5120 cut-off events. For 98789/98789 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 34516 event pairs, 1712 based on Foata normal form. 8/5128 useless extension candidates. Maximal degree in co-relation 36632. Up to 4332 conditions per place. [2024-11-12 08:21:40,660 INFO L140 encePairwiseOnDemand]: 19/26 looper letters, 340 selfloop transitions, 55 changer transitions 3/399 dead transitions. [2024-11-12 08:21:40,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 399 transitions, 7895 flow [2024-11-12 08:21:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 08:21:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 08:21:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2024-11-12 08:21:40,663 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3741258741258741 [2024-11-12 08:21:40,663 INFO L175 Difference]: Start difference. First operand has 289 places, 356 transitions, 6571 flow. Second operand 11 states and 107 transitions. [2024-11-12 08:21:40,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 399 transitions, 7895 flow [2024-11-12 08:21:41,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 399 transitions, 7769 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-11-12 08:21:41,149 INFO L231 Difference]: Finished difference. Result has 292 places, 361 transitions, 6698 flow [2024-11-12 08:21:41,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6445, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6698, PETRI_PLACES=292, PETRI_TRANSITIONS=361} [2024-11-12 08:21:41,150 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 267 predicate places. [2024-11-12 08:21:41,150 INFO L471 AbstractCegarLoop]: Abstraction has has 292 places, 361 transitions, 6698 flow [2024-11-12 08:21:41,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:41,151 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:41,151 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:41,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-12 08:21:41,354 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,SelfDestructingSolverStorable35 [2024-11-12 08:21:41,355 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:41,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:41,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1391912706, now seen corresponding path program 24 times [2024-11-12 08:21:41,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:41,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90028245] [2024-11-12 08:21:41,358 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:41,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:41,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:41,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90028245] [2024-11-12 08:21:41,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90028245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:41,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649960436] [2024-11-12 08:21:41,705 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 08:21:41,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:41,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:41,708 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:41,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-12 08:21:41,818 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-12 08:21:41,819 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 08:21:41,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 08:21:41,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:41,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 59 [2024-11-12 08:21:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:42,031 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:42,115 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:21:42,115 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 54 treesize of output 30 [2024-11-12 08:21:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:42,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649960436] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:42,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:42,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-11-12 08:21:42,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110841917] [2024-11-12 08:21:42,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:42,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 08:21:42,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:42,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 08:21:42,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2024-11-12 08:21:42,163 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:42,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 361 transitions, 6698 flow. Second operand has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:42,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:42,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:42,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 08:21:43,616 INFO L124 PetriNetUnfolderBase]: 2829/5071 cut-off events. [2024-11-12 08:21:43,616 INFO L125 PetriNetUnfolderBase]: For 97023/97023 co-relation queries the response was YES. [2024-11-12 08:21:43,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36468 conditions, 5071 events. 2829/5071 cut-off events. For 97023/97023 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33943 event pairs, 1588 based on Foata normal form. 3/5074 useless extension candidates. Maximal degree in co-relation 36378. Up to 4002 conditions per place. [2024-11-12 08:21:43,672 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 292 selfloop transitions, 97 changer transitions 8/398 dead transitions. [2024-11-12 08:21:43,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 398 transitions, 7865 flow [2024-11-12 08:21:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 08:21:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-12 08:21:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 115 transitions. [2024-11-12 08:21:43,673 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34023668639053256 [2024-11-12 08:21:43,673 INFO L175 Difference]: Start difference. First operand has 292 places, 361 transitions, 6698 flow. Second operand 13 states and 115 transitions. [2024-11-12 08:21:43,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 398 transitions, 7865 flow [2024-11-12 08:21:44,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 398 transitions, 7769 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-12 08:21:44,233 INFO L231 Difference]: Finished difference. Result has 297 places, 360 transitions, 6778 flow [2024-11-12 08:21:44,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=6586, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6778, PETRI_PLACES=297, PETRI_TRANSITIONS=360} [2024-11-12 08:21:44,234 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 272 predicate places. [2024-11-12 08:21:44,234 INFO L471 AbstractCegarLoop]: Abstraction has has 297 places, 360 transitions, 6778 flow [2024-11-12 08:21:44,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:44,234 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 08:21:44,234 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 08:21:44,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-12 08:21:44,435 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,SelfDestructingSolverStorable36 [2024-11-12 08:21:44,435 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 08:21:44,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 08:21:44,436 INFO L85 PathProgramCache]: Analyzing trace with hash -514485728, now seen corresponding path program 25 times [2024-11-12 08:21:44,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 08:21:44,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422048896] [2024-11-12 08:21:44,436 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 08:21:44,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 08:21:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:44,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 08:21:44,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422048896] [2024-11-12 08:21:44,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422048896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 08:21:44,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330551854] [2024-11-12 08:21:44,722 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 08:21:44,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 08:21:44,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 08:21:44,725 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 08:21:44,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-12 08:21:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 08:21:44,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-12 08:21:44,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 08:21:44,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2024-11-12 08:21:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:45,004 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 08:21:45,196 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 08:21:45,196 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 51 treesize of output 27 [2024-11-12 08:21:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 08:21:45,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330551854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 08:21:45,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 08:21:45,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-12 08:21:45,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88009593] [2024-11-12 08:21:45,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 08:21:45,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 08:21:45,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 08:21:45,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 08:21:45,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-12 08:21:45,242 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 26 [2024-11-12 08:21:45,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 360 transitions, 6778 flow. Second operand has 20 states, 20 states have (on average 6.0) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 08:21:45,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 08:21:45,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 26 [2024-11-12 08:21:45,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand