./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.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 b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 12:36:03,065 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 12:36:03,154 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 12:36:03,161 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 12:36:03,161 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 12:36:03,192 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 12:36:03,193 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 12:36:03,193 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 12:36:03,194 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 12:36:03,197 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 12:36:03,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 12:36:03,198 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 12:36:03,199 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 12:36:03,199 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 12:36:03,199 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 12:36:03,199 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 12:36:03,200 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 12:36:03,200 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 12:36:03,200 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 12:36:03,200 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 12:36:03,201 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 12:36:03,203 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 12:36:03,204 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 12:36:03,204 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 12:36:03,204 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 12:36:03,204 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 12:36:03,205 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 12:36:03,205 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 12:36:03,205 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 12:36:03,205 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 12:36:03,206 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 12:36:03,206 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 12:36:03,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:36:03,207 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 12:36:03,208 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 12:36:03,208 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 12:36:03,208 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 12:36:03,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 12:36:03,209 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 12:36:03,209 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 12:36:03,209 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 12:36:03,210 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 12:36:03,210 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 [2024-10-24 12:36:03,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 12:36:03,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 12:36:03,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 12:36:03,466 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 12:36:03,466 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 12:36:03,467 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2024-10-24 12:36:04,914 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 12:36:05,090 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 12:36:05,090 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2024-10-24 12:36:05,098 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8ef7b7bb/24733db32f9247ffbbf42c17019fde37/FLAG29ea07106 [2024-10-24 12:36:05,477 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8ef7b7bb/24733db32f9247ffbbf42c17019fde37 [2024-10-24 12:36:05,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 12:36:05,480 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 12:36:05,481 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 12:36:05,482 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 12:36:05,488 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 12:36:05,489 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1417427b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05, skipping insertion in model container [2024-10-24 12:36:05,490 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,511 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 12:36:05,711 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2664,2677] [2024-10-24 12:36:05,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:36:05,728 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 12:36:05,753 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2664,2677] [2024-10-24 12:36:05,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 12:36:05,780 INFO L204 MainTranslator]: Completed translation [2024-10-24 12:36:05,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05 WrapperNode [2024-10-24 12:36:05,780 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 12:36:05,781 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 12:36:05,782 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 12:36:05,782 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 12:36:05,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,798 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,820 INFO L138 Inliner]: procedures = 22, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 98 [2024-10-24 12:36:05,822 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 12:36:05,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 12:36:05,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 12:36:05,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 12:36:05,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,837 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,867 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-24 12:36:05,867 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,867 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,874 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,881 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,886 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,887 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 12:36:05,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 12:36:05,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 12:36:05,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 12:36:05,892 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (1/1) ... [2024-10-24 12:36:05,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 12:36:05,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:05,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 12:36:05,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 12:36:05,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 12:36:05,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 12:36:05,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 12:36:05,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 12:36:05,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 12:36:05,987 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 12:36:05,987 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 12:36:05,988 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-24 12:36:05,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-24 12:36:05,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 12:36:05,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 12:36:05,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 12:36:05,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 12:36:05,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 12:36:05,992 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 12:36:06,102 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 12:36:06,105 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 12:36:06,308 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 12:36:06,310 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 12:36:06,464 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 12:36:06,465 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-24 12:36:06,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:36:06 BoogieIcfgContainer [2024-10-24 12:36:06,465 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 12:36:06,470 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 12:36:06,470 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 12:36:06,476 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 12:36:06,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:36:05" (1/3) ... [2024-10-24 12:36:06,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3530a991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:36:06, skipping insertion in model container [2024-10-24 12:36:06,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:36:05" (2/3) ... [2024-10-24 12:36:06,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3530a991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:36:06, skipping insertion in model container [2024-10-24 12:36:06,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:36:06" (3/3) ... [2024-10-24 12:36:06,481 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2024-10-24 12:36:06,495 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 12:36:06,495 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 12:36:06,496 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 12:36:06,565 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-24 12:36:06,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 40 transitions, 108 flow [2024-10-24 12:36:06,646 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2024-10-24 12:36:06,649 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 12:36:06,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 36 events. 4/36 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-10-24 12:36:06,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 40 transitions, 108 flow [2024-10-24 12:36:06,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 35 transitions, 94 flow [2024-10-24 12:36:06,671 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 12:36:06,680 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;@528106bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 12:36:06,680 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-24 12:36:06,698 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 12:36:06,700 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2024-10-24 12:36:06,701 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 12:36:06,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:06,702 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:06,702 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:36:06,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:06,707 INFO L85 PathProgramCache]: Analyzing trace with hash -196909692, now seen corresponding path program 1 times [2024-10-24 12:36:06,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:06,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099404206] [2024-10-24 12:36:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:06,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:07,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:07,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099404206] [2024-10-24 12:36:07,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099404206] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:07,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:07,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 12:36:07,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041556995] [2024-10-24 12:36:07,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:07,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 12:36:07,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:07,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 12:36:07,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 12:36:07,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-10-24 12:36:07,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:07,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:07,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-10-24 12:36:07,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:07,723 INFO L124 PetriNetUnfolderBase]: 3042/4228 cut-off events. [2024-10-24 12:36:07,723 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2024-10-24 12:36:07,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8628 conditions, 4228 events. 3042/4228 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18771 event pairs, 763 based on Foata normal form. 152/4370 useless extension candidates. Maximal degree in co-relation 7622. Up to 3203 conditions per place. [2024-10-24 12:36:07,761 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 46 selfloop transitions, 3 changer transitions 2/56 dead transitions. [2024-10-24 12:36:07,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 56 transitions, 259 flow [2024-10-24 12:36:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 12:36:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 12:36:07,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-10-24 12:36:07,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-10-24 12:36:07,776 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 94 flow. Second operand 3 states and 81 transitions. [2024-10-24 12:36:07,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 56 transitions, 259 flow [2024-10-24 12:36:07,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 229 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-24 12:36:07,789 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 101 flow [2024-10-24 12:36:07,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-10-24 12:36:07,796 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2024-10-24 12:36:07,796 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 101 flow [2024-10-24 12:36:07,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:07,797 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:07,797 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:07,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 12:36:07,798 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:36:07,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1212674722, now seen corresponding path program 1 times [2024-10-24 12:36:07,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:07,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709252614] [2024-10-24 12:36:07,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:07,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:08,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:08,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709252614] [2024-10-24 12:36:08,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709252614] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:08,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:08,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:36:08,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707928923] [2024-10-24 12:36:08,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:08,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:36:08,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:08,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:36:08,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:36:08,070 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-24 12:36:08,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:08,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:08,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-24 12:36:08,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:09,275 INFO L124 PetriNetUnfolderBase]: 11982/15969 cut-off events. [2024-10-24 12:36:09,276 INFO L125 PetriNetUnfolderBase]: For 965/965 co-relation queries the response was YES. [2024-10-24 12:36:09,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33885 conditions, 15969 events. 11982/15969 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 80300 event pairs, 4246 based on Foata normal form. 0/12597 useless extension candidates. Maximal degree in co-relation 9444. Up to 8562 conditions per place. [2024-10-24 12:36:09,438 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 81 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-10-24 12:36:09,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 96 transitions, 418 flow [2024-10-24 12:36:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:36:09,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:36:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-10-24 12:36:09,441 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-10-24 12:36:09,441 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 101 flow. Second operand 5 states and 129 transitions. [2024-10-24 12:36:09,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 96 transitions, 418 flow [2024-10-24 12:36:09,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 96 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 12:36:09,444 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 165 flow [2024-10-24 12:36:09,444 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2024-10-24 12:36:09,445 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-10-24 12:36:09,445 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 165 flow [2024-10-24 12:36:09,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:09,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:09,446 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:09,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 12:36:09,446 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:36:09,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:09,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1378229130, now seen corresponding path program 2 times [2024-10-24 12:36:09,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:09,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925412520] [2024-10-24 12:36:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:09,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:09,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:09,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925412520] [2024-10-24 12:36:09,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925412520] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:09,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:09,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 12:36:09,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628362287] [2024-10-24 12:36:09,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:09,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 12:36:09,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:09,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 12:36:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:36:09,620 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-24 12:36:09,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:09,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:09,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-24 12:36:09,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:11,466 INFO L124 PetriNetUnfolderBase]: 17012/23075 cut-off events. [2024-10-24 12:36:11,467 INFO L125 PetriNetUnfolderBase]: For 10240/10264 co-relation queries the response was YES. [2024-10-24 12:36:11,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59304 conditions, 23075 events. 17012/23075 cut-off events. For 10240/10264 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 128533 event pairs, 1739 based on Foata normal form. 1551/24214 useless extension candidates. Maximal degree in co-relation 34291. Up to 6690 conditions per place. [2024-10-24 12:36:11,727 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 119 selfloop transitions, 23 changer transitions 2/149 dead transitions. [2024-10-24 12:36:11,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 149 transitions, 759 flow [2024-10-24 12:36:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:36:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 12:36:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-10-24 12:36:11,732 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6714285714285714 [2024-10-24 12:36:11,732 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 165 flow. Second operand 7 states and 188 transitions. [2024-10-24 12:36:11,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 149 transitions, 759 flow [2024-10-24 12:36:11,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 149 transitions, 759 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 12:36:11,746 INFO L231 Difference]: Finished difference. Result has 57 places, 62 transitions, 355 flow [2024-10-24 12:36:11,746 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=355, PETRI_PLACES=57, PETRI_TRANSITIONS=62} [2024-10-24 12:36:11,747 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-10-24 12:36:11,748 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 62 transitions, 355 flow [2024-10-24 12:36:11,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:11,748 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:11,748 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:11,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 12:36:11,749 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:36:11,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1181142688, now seen corresponding path program 3 times [2024-10-24 12:36:11,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:11,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620407989] [2024-10-24 12:36:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:11,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:11,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:11,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:11,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620407989] [2024-10-24 12:36:11,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620407989] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:11,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:11,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:36:11,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759768392] [2024-10-24 12:36:11,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:11,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:36:11,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:11,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:36:11,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:36:11,906 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-24 12:36:11,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 62 transitions, 355 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:11,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:11,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-24 12:36:11,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:14,106 INFO L124 PetriNetUnfolderBase]: 22345/30237 cut-off events. [2024-10-24 12:36:14,106 INFO L125 PetriNetUnfolderBase]: For 50507/50583 co-relation queries the response was YES. [2024-10-24 12:36:14,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97892 conditions, 30237 events. 22345/30237 cut-off events. For 50507/50583 co-relation queries the response was YES. Maximal size of possible extension queue 1159. Compared 170935 event pairs, 6489 based on Foata normal form. 556/30186 useless extension candidates. Maximal degree in co-relation 53450. Up to 15419 conditions per place. [2024-10-24 12:36:14,523 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 103 selfloop transitions, 12 changer transitions 9/129 dead transitions. [2024-10-24 12:36:14,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 129 transitions, 891 flow [2024-10-24 12:36:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:36:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:36:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-10-24 12:36:14,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-10-24 12:36:14,525 INFO L175 Difference]: Start difference. First operand has 57 places, 62 transitions, 355 flow. Second operand 5 states and 129 transitions. [2024-10-24 12:36:14,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 129 transitions, 891 flow [2024-10-24 12:36:14,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 129 transitions, 879 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-10-24 12:36:14,902 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 440 flow [2024-10-24 12:36:14,902 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=440, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-10-24 12:36:14,903 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-10-24 12:36:14,903 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 440 flow [2024-10-24 12:36:14,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:14,904 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:14,904 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:14,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 12:36:14,904 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:36:14,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:14,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1923555558, now seen corresponding path program 1 times [2024-10-24 12:36:14,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:14,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129655460] [2024-10-24 12:36:14,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:14,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:15,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:15,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129655460] [2024-10-24 12:36:15,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129655460] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:15,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:15,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:36:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075498003] [2024-10-24 12:36:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:15,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:36:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:36:15,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:36:15,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-24 12:36:15,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 440 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:15,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:15,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-24 12:36:15,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:17,120 INFO L124 PetriNetUnfolderBase]: 22445/30176 cut-off events. [2024-10-24 12:36:17,120 INFO L125 PetriNetUnfolderBase]: For 91411/91433 co-relation queries the response was YES. [2024-10-24 12:36:17,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110644 conditions, 30176 events. 22445/30176 cut-off events. For 91411/91433 co-relation queries the response was YES. Maximal size of possible extension queue 1126. Compared 166708 event pairs, 7842 based on Foata normal form. 114/29521 useless extension candidates. Maximal degree in co-relation 49421. Up to 15999 conditions per place. [2024-10-24 12:36:17,364 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 71 selfloop transitions, 9 changer transitions 29/114 dead transitions. [2024-10-24 12:36:17,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 114 transitions, 876 flow [2024-10-24 12:36:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:36:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:36:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-10-24 12:36:17,367 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-10-24 12:36:17,367 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 440 flow. Second operand 5 states and 124 transitions. [2024-10-24 12:36:17,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 114 transitions, 876 flow [2024-10-24 12:36:17,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 114 transitions, 812 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-10-24 12:36:17,585 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 413 flow [2024-10-24 12:36:17,586 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=413, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2024-10-24 12:36:17,586 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-10-24 12:36:17,587 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 413 flow [2024-10-24 12:36:17,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:17,587 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:17,587 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:17,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 12:36:17,588 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:36:17,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:17,588 INFO L85 PathProgramCache]: Analyzing trace with hash 861508722, now seen corresponding path program 4 times [2024-10-24 12:36:17,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:17,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746160475] [2024-10-24 12:36:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:17,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:17,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:17,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746160475] [2024-10-24 12:36:17,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746160475] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:17,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:17,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 12:36:17,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858696518] [2024-10-24 12:36:17,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:17,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 12:36:17,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:17,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 12:36:17,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-24 12:36:17,731 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-24 12:36:17,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 413 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:17,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:17,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-24 12:36:17,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:19,854 INFO L124 PetriNetUnfolderBase]: 21387/28703 cut-off events. [2024-10-24 12:36:19,854 INFO L125 PetriNetUnfolderBase]: For 74254/74326 co-relation queries the response was YES. [2024-10-24 12:36:19,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101382 conditions, 28703 events. 21387/28703 cut-off events. For 74254/74326 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 155781 event pairs, 6396 based on Foata normal form. 562/28612 useless extension candidates. Maximal degree in co-relation 65402. Up to 10986 conditions per place. [2024-10-24 12:36:20,051 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 105 selfloop transitions, 35 changer transitions 3/148 dead transitions. [2024-10-24 12:36:20,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 148 transitions, 1127 flow [2024-10-24 12:36:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 12:36:20,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 12:36:20,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-10-24 12:36:20,053 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-10-24 12:36:20,053 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 413 flow. Second operand 6 states and 155 transitions. [2024-10-24 12:36:20,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 148 transitions, 1127 flow [2024-10-24 12:36:20,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 148 transitions, 1071 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-10-24 12:36:20,335 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 689 flow [2024-10-24 12:36:20,335 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=689, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2024-10-24 12:36:20,336 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-10-24 12:36:20,336 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 689 flow [2024-10-24 12:36:20,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:20,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:20,336 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:20,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 12:36:20,337 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:36:20,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1556545025, now seen corresponding path program 1 times [2024-10-24 12:36:20,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:20,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138818728] [2024-10-24 12:36:20,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:20,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:20,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:20,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:20,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138818728] [2024-10-24 12:36:20,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138818728] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:20,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564202607] [2024-10-24 12:36:20,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:20,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:20,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:20,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:20,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 12:36:20,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:20,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:36:20,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:20,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:20,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564202607] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:20,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:36:20,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-10-24 12:36:20,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20138828] [2024-10-24 12:36:20,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:20,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:36:20,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:20,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:36:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:36:20,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-24 12:36:20,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 689 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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) [2024-10-24 12:36:20,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:20,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-24 12:36:20,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:23,172 INFO L124 PetriNetUnfolderBase]: 23218/31449 cut-off events. [2024-10-24 12:36:23,172 INFO L125 PetriNetUnfolderBase]: For 116623/116649 co-relation queries the response was YES. [2024-10-24 12:36:23,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126099 conditions, 31449 events. 23218/31449 cut-off events. For 116623/116649 co-relation queries the response was YES. Maximal size of possible extension queue 1214. Compared 177971 event pairs, 2979 based on Foata normal form. 915/31862 useless extension candidates. Maximal degree in co-relation 81751. Up to 15130 conditions per place. [2024-10-24 12:36:23,421 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 108 selfloop transitions, 21 changer transitions 0/134 dead transitions. [2024-10-24 12:36:23,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 134 transitions, 1364 flow [2024-10-24 12:36:23,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:36:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:36:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-10-24 12:36:23,423 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-10-24 12:36:23,423 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 689 flow. Second operand 4 states and 98 transitions. [2024-10-24 12:36:23,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 134 transitions, 1364 flow [2024-10-24 12:36:24,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 134 transitions, 1268 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-10-24 12:36:24,008 INFO L231 Difference]: Finished difference. Result has 73 places, 84 transitions, 737 flow [2024-10-24 12:36:24,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=737, PETRI_PLACES=73, PETRI_TRANSITIONS=84} [2024-10-24 12:36:24,009 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-10-24 12:36:24,009 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 84 transitions, 737 flow [2024-10-24 12:36:24,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 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) [2024-10-24 12:36:24,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:24,010 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:24,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 12:36:24,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:24,211 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:36:24,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:24,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1417153903, now seen corresponding path program 2 times [2024-10-24 12:36:24,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:24,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970070384] [2024-10-24 12:36:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:24,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:24,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:24,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970070384] [2024-10-24 12:36:24,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970070384] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:24,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:24,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:36:24,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734964036] [2024-10-24 12:36:24,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:24,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:36:24,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:36:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:36:24,405 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-24 12:36:24,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 84 transitions, 737 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:24,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:24,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-24 12:36:24,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:27,330 INFO L124 PetriNetUnfolderBase]: 28978/38784 cut-off events. [2024-10-24 12:36:27,331 INFO L125 PetriNetUnfolderBase]: For 175708/175746 co-relation queries the response was YES. [2024-10-24 12:36:27,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167271 conditions, 38784 events. 28978/38784 cut-off events. For 175708/175746 co-relation queries the response was YES. Maximal size of possible extension queue 1469. Compared 219521 event pairs, 7781 based on Foata normal form. 200/38198 useless extension candidates. Maximal degree in co-relation 115193. Up to 19286 conditions per place. [2024-10-24 12:36:27,679 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 148 selfloop transitions, 24 changer transitions 1/178 dead transitions. [2024-10-24 12:36:27,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 178 transitions, 1840 flow [2024-10-24 12:36:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:36:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:36:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-10-24 12:36:27,681 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-10-24 12:36:27,681 INFO L175 Difference]: Start difference. First operand has 73 places, 84 transitions, 737 flow. Second operand 5 states and 123 transitions. [2024-10-24 12:36:27,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 178 transitions, 1840 flow [2024-10-24 12:36:28,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 178 transitions, 1789 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-24 12:36:28,169 INFO L231 Difference]: Finished difference. Result has 78 places, 97 transitions, 940 flow [2024-10-24 12:36:28,170 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=940, PETRI_PLACES=78, PETRI_TRANSITIONS=97} [2024-10-24 12:36:28,170 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-10-24 12:36:28,171 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 97 transitions, 940 flow [2024-10-24 12:36:28,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:28,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:28,171 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:28,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 12:36:28,172 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:36:28,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:28,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1829799521, now seen corresponding path program 3 times [2024-10-24 12:36:28,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:28,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47614188] [2024-10-24 12:36:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:28,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:28,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:28,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47614188] [2024-10-24 12:36:28,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47614188] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:28,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142001181] [2024-10-24 12:36:28,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 12:36:28,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:28,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:28,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:28,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 12:36:28,351 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 12:36:28,351 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:28,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:36:28,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:28,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:28,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:28,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142001181] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 12:36:28,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 12:36:28,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-10-24 12:36:28,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123906976] [2024-10-24 12:36:28,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 12:36:28,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 12:36:28,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:28,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 12:36:28,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-10-24 12:36:28,544 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-24 12:36:28,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 97 transitions, 940 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:28,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:28,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-24 12:36:28,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:32,749 INFO L124 PetriNetUnfolderBase]: 36553/49922 cut-off events. [2024-10-24 12:36:32,750 INFO L125 PetriNetUnfolderBase]: For 276233/276267 co-relation queries the response was YES. [2024-10-24 12:36:33,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230047 conditions, 49922 events. 36553/49922 cut-off events. For 276233/276267 co-relation queries the response was YES. Maximal size of possible extension queue 1836. Compared 301182 event pairs, 7282 based on Foata normal form. 1015/50066 useless extension candidates. Maximal degree in co-relation 154521. Up to 17366 conditions per place. [2024-10-24 12:36:33,528 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 207 selfloop transitions, 76 changer transitions 1/289 dead transitions. [2024-10-24 12:36:33,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 289 transitions, 3343 flow [2024-10-24 12:36:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 12:36:33,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 12:36:33,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-10-24 12:36:33,530 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-10-24 12:36:33,530 INFO L175 Difference]: Start difference. First operand has 78 places, 97 transitions, 940 flow. Second operand 7 states and 172 transitions. [2024-10-24 12:36:33,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 289 transitions, 3343 flow [2024-10-24 12:36:34,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 289 transitions, 3224 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-10-24 12:36:34,385 INFO L231 Difference]: Finished difference. Result has 88 places, 156 transitions, 2027 flow [2024-10-24 12:36:34,386 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2027, PETRI_PLACES=88, PETRI_TRANSITIONS=156} [2024-10-24 12:36:34,386 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-10-24 12:36:34,387 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 156 transitions, 2027 flow [2024-10-24 12:36:34,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:34,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:34,387 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:34,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 12:36:34,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-24 12:36:34,588 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:36:34,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1451895657, now seen corresponding path program 4 times [2024-10-24 12:36:34,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986761531] [2024-10-24 12:36:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:34,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:34,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:34,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986761531] [2024-10-24 12:36:34,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986761531] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:34,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:34,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:36:34,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900316687] [2024-10-24 12:36:34,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:34,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:36:34,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:34,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:36:34,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:36:34,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-24 12:36:34,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 156 transitions, 2027 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:34,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:34,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-24 12:36:34,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:39,390 INFO L124 PetriNetUnfolderBase]: 36999/50104 cut-off events. [2024-10-24 12:36:39,390 INFO L125 PetriNetUnfolderBase]: For 394247/394301 co-relation queries the response was YES. [2024-10-24 12:36:39,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256786 conditions, 50104 events. 36999/50104 cut-off events. For 394247/394301 co-relation queries the response was YES. Maximal size of possible extension queue 1758. Compared 294798 event pairs, 11919 based on Foata normal form. 104/48986 useless extension candidates. Maximal degree in co-relation 180710. Up to 24662 conditions per place. [2024-10-24 12:36:39,912 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 175 selfloop transitions, 7 changer transitions 17/204 dead transitions. [2024-10-24 12:36:39,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 204 transitions, 2782 flow [2024-10-24 12:36:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:36:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:36:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-10-24 12:36:39,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-10-24 12:36:39,913 INFO L175 Difference]: Start difference. First operand has 88 places, 156 transitions, 2027 flow. Second operand 5 states and 108 transitions. [2024-10-24 12:36:39,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 204 transitions, 2782 flow [2024-10-24 12:36:41,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 204 transitions, 2654 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-10-24 12:36:41,821 INFO L231 Difference]: Finished difference. Result has 91 places, 154 transitions, 1937 flow [2024-10-24 12:36:41,821 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1937, PETRI_PLACES=91, PETRI_TRANSITIONS=154} [2024-10-24 12:36:41,822 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-10-24 12:36:41,822 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 154 transitions, 1937 flow [2024-10-24 12:36:41,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:41,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:41,822 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:41,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-24 12:36:41,823 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:36:41,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:41,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1372284545, now seen corresponding path program 1 times [2024-10-24 12:36:41,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:41,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299444941] [2024-10-24 12:36:41,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:41,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 12:36:41,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:41,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299444941] [2024-10-24 12:36:41,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299444941] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:36:41,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:36:41,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:36:41,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484230842] [2024-10-24 12:36:41,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:41,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:36:41,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:41,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:36:41,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:36:41,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-24 12:36:41,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 154 transitions, 1937 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:41,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:41,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-24 12:36:41,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:48,025 INFO L124 PetriNetUnfolderBase]: 47704/63921 cut-off events. [2024-10-24 12:36:48,026 INFO L125 PetriNetUnfolderBase]: For 521446/521514 co-relation queries the response was YES. [2024-10-24 12:36:48,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330840 conditions, 63921 events. 47704/63921 cut-off events. For 521446/521514 co-relation queries the response was YES. Maximal size of possible extension queue 2354. Compared 381364 event pairs, 11903 based on Foata normal form. 722/62918 useless extension candidates. Maximal degree in co-relation 258682. Up to 28686 conditions per place. [2024-10-24 12:36:48,780 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 160 selfloop transitions, 113 changer transitions 0/278 dead transitions. [2024-10-24 12:36:48,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 278 transitions, 3818 flow [2024-10-24 12:36:48,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 12:36:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 12:36:48,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-10-24 12:36:48,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-10-24 12:36:48,781 INFO L175 Difference]: Start difference. First operand has 91 places, 154 transitions, 1937 flow. Second operand 5 states and 128 transitions. [2024-10-24 12:36:48,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 278 transitions, 3818 flow [2024-10-24 12:36:51,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 278 transitions, 3698 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-10-24 12:36:51,694 INFO L231 Difference]: Finished difference. Result has 90 places, 188 transitions, 2772 flow [2024-10-24 12:36:51,695 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2772, PETRI_PLACES=90, PETRI_TRANSITIONS=188} [2024-10-24 12:36:51,695 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-10-24 12:36:51,695 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 188 transitions, 2772 flow [2024-10-24 12:36:51,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:51,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:36:51,696 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:36:51,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-24 12:36:51,696 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:36:51,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:36:51,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2115531539, now seen corresponding path program 2 times [2024-10-24 12:36:51,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:36:51,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513834341] [2024-10-24 12:36:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:36:51,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:36:51,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:36:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:51,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:36:51,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513834341] [2024-10-24 12:36:51,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513834341] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:51,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678908358] [2024-10-24 12:36:51,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 12:36:51,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:36:51,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 12:36:51,818 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 12:36:51,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 12:36:51,886 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 12:36:51,886 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 12:36:51,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 12:36:51,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 12:36:51,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:51,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 12:36:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 12:36:51,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678908358] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 12:36:51,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-24 12:36:51,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-10-24 12:36:51,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893891751] [2024-10-24 12:36:51,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:36:51,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 12:36:51,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:36:51,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 12:36:51,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-24 12:36:51,997 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-24 12:36:51,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 188 transitions, 2772 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:36:51,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:36:51,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-24 12:36:51,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 12:36:58,376 INFO L124 PetriNetUnfolderBase]: 52170/69784 cut-off events. [2024-10-24 12:36:58,376 INFO L125 PetriNetUnfolderBase]: For 675267/675401 co-relation queries the response was YES. [2024-10-24 12:36:58,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 392766 conditions, 69784 events. 52170/69784 cut-off events. For 675267/675401 co-relation queries the response was YES. Maximal size of possible extension queue 2642. Compared 420046 event pairs, 6561 based on Foata normal form. 1731/69507 useless extension candidates. Maximal degree in co-relation 269507. Up to 36214 conditions per place. [2024-10-24 12:36:59,093 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 228 selfloop transitions, 51 changer transitions 0/284 dead transitions. [2024-10-24 12:36:59,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 284 transitions, 4660 flow [2024-10-24 12:36:59,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 12:36:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 12:36:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-10-24 12:36:59,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-10-24 12:36:59,094 INFO L175 Difference]: Start difference. First operand has 90 places, 188 transitions, 2772 flow. Second operand 4 states and 95 transitions. [2024-10-24 12:36:59,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 284 transitions, 4660 flow [2024-10-24 12:37:03,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 284 transitions, 4451 flow, removed 70 selfloop flow, removed 2 redundant places. [2024-10-24 12:37:03,897 INFO L231 Difference]: Finished difference. Result has 93 places, 198 transitions, 2973 flow [2024-10-24 12:37:03,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2651, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2973, PETRI_PLACES=93, PETRI_TRANSITIONS=198} [2024-10-24 12:37:03,898 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-10-24 12:37:03,899 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 198 transitions, 2973 flow [2024-10-24 12:37:03,899 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:37:03,899 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 12:37:03,899 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 12:37:03,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 12:37:04,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 12:37:04,100 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-10-24 12:37:04,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 12:37:04,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1909169881, now seen corresponding path program 3 times [2024-10-24 12:37:04,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 12:37:04,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327390246] [2024-10-24 12:37:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 12:37:04,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 12:37:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 12:37:04,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 12:37:04,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 12:37:04,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327390246] [2024-10-24 12:37:04,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327390246] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 12:37:04,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 12:37:04,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 12:37:04,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222386976] [2024-10-24 12:37:04,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 12:37:04,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 12:37:04,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 12:37:04,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 12:37:04,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 12:37:04,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-10-24 12:37:04,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 198 transitions, 2973 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 12:37:04,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 12:37:04,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-10-24 12:37:04,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand