./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC --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 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:47:11,706 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:47:11,786 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-24 01:47:11,793 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:47:11,794 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:47:11,823 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:47:11,824 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:47:11,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:47:11,824 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:47:11,825 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:47:11,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:47:11,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:47:11,826 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:47:11,826 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:47:11,826 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:47:11,826 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:47:11,826 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-24 01:47:11,827 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 01:47:11,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 01:47:11,827 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 01:47:11,827 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:47:11,827 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-24 01:47:11,828 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:47:11,828 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-24 01:47:11,828 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 01:47:11,828 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-24 01:47:11,828 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:47:11,828 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:47:11,829 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:47:11,829 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:47:11,829 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:47:11,829 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:47:11,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:47:11,829 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:47:11,830 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:47:11,830 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:47:11,830 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:47:11,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:47:11,831 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:47:11,831 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:47:11,831 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-24 01:47:11,831 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-24 01:47:11,831 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 01:47:11,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 01:47:11,832 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:47:11,832 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:47:11,832 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:47:11,832 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:47:11,832 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC 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 -> 87e1a1d3acb3ee9b7a4a97eb7b14df31d5b38b7566b1218cea0dabfe5ec8ddbd [2024-11-24 01:47:12,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:47:12,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:47:12,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:47:12,257 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:47:12,258 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:47:12,259 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-24 01:47:15,903 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/data/adccb944e/dd953236af0e464783040cff00bb050f/FLAGdf1f3d5d8 [2024-11-24 01:47:16,269 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:47:16,269 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-24 01:47:16,280 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/data/adccb944e/dd953236af0e464783040cff00bb050f/FLAGdf1f3d5d8 [2024-11-24 01:47:16,316 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/data/adccb944e/dd953236af0e464783040cff00bb050f [2024-11-24 01:47:16,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:47:16,324 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:47:16,325 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:47:16,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:47:16,342 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:47:16,346 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,348 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248d4b49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16, skipping insertion in model container [2024-11-24 01:47:16,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,377 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:47:16,605 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-11-24 01:47:16,609 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:47:16,621 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:47:16,641 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/sv-benchmarks/c/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2173,2186] [2024-11-24 01:47:16,642 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:47:16,660 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:47:16,661 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16 WrapperNode [2024-11-24 01:47:16,661 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:47:16,662 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:47:16,662 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:47:16,662 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:47:16,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,676 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,692 INFO L138 Inliner]: procedures = 20, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2024-11-24 01:47:16,693 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:47:16,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:47:16,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:47:16,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:47:16,702 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,704 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,717 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]. [2024-11-24 01:47:16,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,717 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,721 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,722 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,726 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,727 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,728 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,730 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:47:16,731 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:47:16,731 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:47:16,731 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:47:16,732 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (1/1) ... [2024-11-24 01:47:16,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:47:16,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:16,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:47:16,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:47:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:47:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 01:47:16,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 01:47:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 01:47:16,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 01:47:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 01:47:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-24 01:47:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-24 01:47:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:47:16,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:47:16,816 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 01:47:16,923 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:47:16,924 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:47:17,140 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 01:47:17,140 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:47:17,373 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:47:17,373 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-24 01:47:17,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:47:17 BoogieIcfgContainer [2024-11-24 01:47:17,375 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:47:17,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:47:17,379 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:47:17,387 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:47:17,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:47:16" (1/3) ... [2024-11-24 01:47:17,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571ce2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:47:17, skipping insertion in model container [2024-11-24 01:47:17,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:47:16" (2/3) ... [2024-11-24 01:47:17,389 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@571ce2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:47:17, skipping insertion in model container [2024-11-24 01:47:17,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:47:17" (3/3) ... [2024-11-24 01:47:17,392 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2024-11-24 01:47:17,411 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:47:17,413 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-nonblocking-counter-alt2.wvr.c that has 3 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-24 01:47:17,414 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 01:47:17,495 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-24 01:47:17,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 21 transitions, 56 flow [2024-11-24 01:47:17,599 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-11-24 01:47:17,602 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 01:47:17,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 19 events. 2/19 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-11-24 01:47:17,607 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 21 transitions, 56 flow [2024-11-24 01:47:17,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 48 flow [2024-11-24 01:47:17,621 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:47:17,635 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;@160bf8d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:47:17,636 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-24 01:47:17,648 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 01:47:17,648 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2024-11-24 01:47:17,649 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-24 01:47:17,649 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:47:17,650 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:17,650 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:47:17,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:17,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2020468598, now seen corresponding path program 1 times [2024-11-24 01:47:17,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:17,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914714434] [2024-11-24 01:47:17,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:47:17,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:47:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:18,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:18,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914714434] [2024-11-24 01:47:18,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914714434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:47:18,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:47:18,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:47:18,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764966585] [2024-11-24 01:47:18,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:47:18,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:47:18,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:18,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:47:18,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:47:18,246 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-24 01:47:18,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:18,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:47:18,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-24 01:47:18,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:47:18,428 INFO L124 PetriNetUnfolderBase]: 73/144 cut-off events. [2024-11-24 01:47:18,428 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-24 01:47:18,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 144 events. 73/144 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 409 event pairs, 22 based on Foata normal form. 1/141 useless extension candidates. Maximal degree in co-relation 252. Up to 74 conditions per place. [2024-11-24 01:47:18,435 INFO L140 encePairwiseOnDemand]: 18/21 looper letters, 20 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-11-24 01:47:18,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 28 transitions, 127 flow [2024-11-24 01:47:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:47:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:47:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-11-24 01:47:18,453 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-11-24 01:47:18,455 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 48 flow. Second operand 3 states and 41 transitions. [2024-11-24 01:47:18,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 28 transitions, 127 flow [2024-11-24 01:47:18,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:47:18,465 INFO L231 Difference]: Finished difference. Result has 22 places, 19 transitions, 52 flow [2024-11-24 01:47:18,468 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=22, PETRI_TRANSITIONS=19} [2024-11-24 01:47:18,475 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2024-11-24 01:47:18,475 INFO L471 AbstractCegarLoop]: Abstraction has has 22 places, 19 transitions, 52 flow [2024-11-24 01:47:18,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:18,475 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:47:18,476 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:18,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 01:47:18,476 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:47:18,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:18,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1800830420, now seen corresponding path program 1 times [2024-11-24 01:47:18,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:18,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653318110] [2024-11-24 01:47:18,478 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:47:18,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:47:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:18,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:18,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653318110] [2024-11-24 01:47:18,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653318110] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:47:18,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:47:18,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:47:18,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148534902] [2024-11-24 01:47:18,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:47:18,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:47:18,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:18,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:47:18,689 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:47:18,694 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-24 01:47:18,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:18,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:47:18,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-24 01:47:18,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:47:18,890 INFO L124 PetriNetUnfolderBase]: 141/258 cut-off events. [2024-11-24 01:47:18,890 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-24 01:47:18,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 531 conditions, 258 events. 141/258 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 891 event pairs, 81 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 277. Up to 179 conditions per place. [2024-11-24 01:47:18,892 INFO L140 encePairwiseOnDemand]: 17/21 looper letters, 21 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2024-11-24 01:47:18,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 27 transitions, 117 flow [2024-11-24 01:47:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:47:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:47:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 41 transitions. [2024-11-24 01:47:18,897 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-11-24 01:47:18,898 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 52 flow. Second operand 4 states and 41 transitions. [2024-11-24 01:47:18,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 27 transitions, 117 flow [2024-11-24 01:47:18,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:47:18,900 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 64 flow [2024-11-24 01:47:18,900 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2024-11-24 01:47:18,901 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-11-24 01:47:18,901 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 64 flow [2024-11-24 01:47:18,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:18,902 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:47:18,902 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:18,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 01:47:18,903 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:47:18,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:18,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2023668756, now seen corresponding path program 1 times [2024-11-24 01:47:18,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:18,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973996698] [2024-11-24 01:47:18,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:47:18,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:47:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:19,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:19,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973996698] [2024-11-24 01:47:19,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973996698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:47:19,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611571386] [2024-11-24 01:47:19,562 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:47:19,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:19,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:19,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:47:19,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:47:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:47:19,673 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 01:47:19,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:47:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:20,151 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:47:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:20,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611571386] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:47:20,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:47:20,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2024-11-24 01:47:20,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329694209] [2024-11-24 01:47:20,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:47:20,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 01:47:20,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:20,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 01:47:20,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:47:20,952 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:47:20,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 20 transitions, 64 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:20,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:47:20,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:47:20,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:47:22,196 INFO L124 PetriNetUnfolderBase]: 580/998 cut-off events. [2024-11-24 01:47:22,196 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2024-11-24 01:47:22,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 998 events. 580/998 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4179 event pairs, 28 based on Foata normal form. 2/920 useless extension candidates. Maximal degree in co-relation 879. Up to 244 conditions per place. [2024-11-24 01:47:22,208 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 114 selfloop transitions, 42 changer transitions 12/169 dead transitions. [2024-11-24 01:47:22,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 169 transitions, 831 flow [2024-11-24 01:47:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-24 01:47:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-24 01:47:22,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 223 transitions. [2024-11-24 01:47:22,212 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5588972431077694 [2024-11-24 01:47:22,213 INFO L175 Difference]: Start difference. First operand has 25 places, 20 transitions, 64 flow. Second operand 19 states and 223 transitions. [2024-11-24 01:47:22,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 169 transitions, 831 flow [2024-11-24 01:47:22,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 169 transitions, 807 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-24 01:47:22,219 INFO L231 Difference]: Finished difference. Result has 52 places, 65 transitions, 412 flow [2024-11-24 01:47:22,219 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=412, PETRI_PLACES=52, PETRI_TRANSITIONS=65} [2024-11-24 01:47:22,220 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 29 predicate places. [2024-11-24 01:47:22,221 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 65 transitions, 412 flow [2024-11-24 01:47:22,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:22,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:47:22,221 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:22,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 01:47:22,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:22,426 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:47:22,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:22,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1804494400, now seen corresponding path program 2 times [2024-11-24 01:47:22,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:22,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171115519] [2024-11-24 01:47:22,427 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:47:22,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:22,457 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:47:22,457 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:22,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:22,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171115519] [2024-11-24 01:47:22,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171115519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:47:22,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448906224] [2024-11-24 01:47:22,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:47:22,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:22,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:22,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:47:22,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:47:22,964 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:47:22,964 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:22,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 01:47:22,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:47:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:47:23,155 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:47:23,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448906224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:47:23,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:47:23,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-24 01:47:23,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853660776] [2024-11-24 01:47:23,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:47:23,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 01:47:23,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:23,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 01:47:23,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:47:23,173 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:47:23,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 65 transitions, 412 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:23,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:47:23,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:47:23,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:47:23,468 INFO L124 PetriNetUnfolderBase]: 604/1038 cut-off events. [2024-11-24 01:47:23,468 INFO L125 PetriNetUnfolderBase]: For 1854/1854 co-relation queries the response was YES. [2024-11-24 01:47:23,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3700 conditions, 1038 events. 604/1038 cut-off events. For 1854/1854 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4360 event pairs, 175 based on Foata normal form. 2/1040 useless extension candidates. Maximal degree in co-relation 3401. Up to 912 conditions per place. [2024-11-24 01:47:23,480 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 80 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2024-11-24 01:47:23,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 90 transitions, 729 flow [2024-11-24 01:47:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:47:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:47:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 64 transitions. [2024-11-24 01:47:23,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-11-24 01:47:23,482 INFO L175 Difference]: Start difference. First operand has 52 places, 65 transitions, 412 flow. Second operand 6 states and 64 transitions. [2024-11-24 01:47:23,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 90 transitions, 729 flow [2024-11-24 01:47:23,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 90 transitions, 685 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-11-24 01:47:23,506 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 435 flow [2024-11-24 01:47:23,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=435, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2024-11-24 01:47:23,507 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 36 predicate places. [2024-11-24 01:47:23,508 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 435 flow [2024-11-24 01:47:23,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:23,508 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:47:23,508 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:23,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-24 01:47:23,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:23,712 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:47:23,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:23,713 INFO L85 PathProgramCache]: Analyzing trace with hash 918696120, now seen corresponding path program 3 times [2024-11-24 01:47:23,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:23,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460847689] [2024-11-24 01:47:23,714 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:47:23,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:23,739 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:47:23,739 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:24,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:24,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460847689] [2024-11-24 01:47:24,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460847689] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:47:24,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926301546] [2024-11-24 01:47:24,091 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:47:24,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:24,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:24,094 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:47:24,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:47:24,166 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:47:24,166 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:24,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 01:47:24,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:47:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:47:24,320 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:47:24,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926301546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:47:24,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:47:24,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-24 01:47:24,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378449009] [2024-11-24 01:47:24,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:47:24,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 01:47:24,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:24,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 01:47:24,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:47:24,326 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:47:24,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 435 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:24,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:47:24,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:47:24,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:47:24,615 INFO L124 PetriNetUnfolderBase]: 628/1078 cut-off events. [2024-11-24 01:47:24,615 INFO L125 PetriNetUnfolderBase]: For 2435/2435 co-relation queries the response was YES. [2024-11-24 01:47:24,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4077 conditions, 1078 events. 628/1078 cut-off events. For 2435/2435 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4527 event pairs, 182 based on Foata normal form. 4/1082 useless extension candidates. Maximal degree in co-relation 3563. Up to 920 conditions per place. [2024-11-24 01:47:24,628 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 77 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-11-24 01:47:24,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 91 transitions, 771 flow [2024-11-24 01:47:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:47:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:47:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 61 transitions. [2024-11-24 01:47:24,630 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-11-24 01:47:24,630 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 435 flow. Second operand 6 states and 61 transitions. [2024-11-24 01:47:24,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 91 transitions, 771 flow [2024-11-24 01:47:24,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 91 transitions, 742 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-24 01:47:24,650 INFO L231 Difference]: Finished difference. Result has 64 places, 74 transitions, 507 flow [2024-11-24 01:47:24,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=64, PETRI_TRANSITIONS=74} [2024-11-24 01:47:24,651 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 41 predicate places. [2024-11-24 01:47:24,651 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 74 transitions, 507 flow [2024-11-24 01:47:24,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:24,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:47:24,652 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:24,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 01:47:24,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:24,857 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:47:24,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:24,858 INFO L85 PathProgramCache]: Analyzing trace with hash -31554280, now seen corresponding path program 4 times [2024-11-24 01:47:24,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:24,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981172467] [2024-11-24 01:47:24,858 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:47:24,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:24,874 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:47:24,874 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:25,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:25,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981172467] [2024-11-24 01:47:25,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981172467] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:47:25,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320337179] [2024-11-24 01:47:25,087 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:47:25,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:25,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:25,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:47:25,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:47:25,165 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:47:25,165 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:25,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-24 01:47:25,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:47:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-24 01:47:25,321 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:47:25,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320337179] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:47:25,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:47:25,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2024-11-24 01:47:25,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748828068] [2024-11-24 01:47:25,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:47:25,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:47:25,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:25,323 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:47:25,323 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-24 01:47:25,341 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:47:25,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 74 transitions, 507 flow. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:25,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:47:25,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:47:25,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:47:25,717 INFO L124 PetriNetUnfolderBase]: 685/1181 cut-off events. [2024-11-24 01:47:25,717 INFO L125 PetriNetUnfolderBase]: For 3401/3401 co-relation queries the response was YES. [2024-11-24 01:47:25,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4489 conditions, 1181 events. 685/1181 cut-off events. For 3401/3401 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5168 event pairs, 167 based on Foata normal form. 26/1207 useless extension candidates. Maximal degree in co-relation 3955. Up to 825 conditions per place. [2024-11-24 01:47:25,731 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 79 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-11-24 01:47:25,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 828 flow [2024-11-24 01:47:25,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:47:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:47:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 68 transitions. [2024-11-24 01:47:25,733 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-11-24 01:47:25,733 INFO L175 Difference]: Start difference. First operand has 64 places, 74 transitions, 507 flow. Second operand 7 states and 68 transitions. [2024-11-24 01:47:25,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 828 flow [2024-11-24 01:47:25,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 809 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-24 01:47:25,750 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 587 flow [2024-11-24 01:47:25,750 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=587, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-11-24 01:47:25,751 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 48 predicate places. [2024-11-24 01:47:25,751 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 587 flow [2024-11-24 01:47:25,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:25,751 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:47:25,751 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:25,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 01:47:25,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-24 01:47:25,952 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:47:25,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:25,953 INFO L85 PathProgramCache]: Analyzing trace with hash -2086087432, now seen corresponding path program 5 times [2024-11-24 01:47:25,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:25,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29957873] [2024-11-24 01:47:25,954 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:47:25,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:25,993 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:47:25,993 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:26,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:26,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29957873] [2024-11-24 01:47:26,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29957873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:47:26,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954305002] [2024-11-24 01:47:26,359 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:47:26,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:26,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:26,361 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:47:26,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:47:26,434 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:47:26,435 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:26,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:47:26,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:47:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:26,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:47:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:26,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954305002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:47:26,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:47:26,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2024-11-24 01:47:26,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777565578] [2024-11-24 01:47:26,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:47:26,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-24 01:47:26,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:26,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-24 01:47:26,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-24 01:47:26,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-24 01:47:26,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 587 flow. Second operand has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:26,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:47:26,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-24 01:47:26,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:47:28,187 INFO L124 PetriNetUnfolderBase]: 1391/2377 cut-off events. [2024-11-24 01:47:28,188 INFO L125 PetriNetUnfolderBase]: For 8079/8081 co-relation queries the response was YES. [2024-11-24 01:47:28,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8879 conditions, 2377 events. 1391/2377 cut-off events. For 8079/8081 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 11859 event pairs, 35 based on Foata normal form. 32/2409 useless extension candidates. Maximal degree in co-relation 8252. Up to 490 conditions per place. [2024-11-24 01:47:28,215 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 112 selfloop transitions, 161 changer transitions 19/313 dead transitions. [2024-11-24 01:47:28,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 313 transitions, 2700 flow [2024-11-24 01:47:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-24 01:47:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-24 01:47:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 254 transitions. [2024-11-24 01:47:28,222 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-11-24 01:47:28,223 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 587 flow. Second operand 24 states and 254 transitions. [2024-11-24 01:47:28,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 313 transitions, 2700 flow [2024-11-24 01:47:28,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 313 transitions, 2615 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-11-24 01:47:28,254 INFO L231 Difference]: Finished difference. Result has 101 places, 210 transitions, 2035 flow [2024-11-24 01:47:28,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2035, PETRI_PLACES=101, PETRI_TRANSITIONS=210} [2024-11-24 01:47:28,255 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 78 predicate places. [2024-11-24 01:47:28,256 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 210 transitions, 2035 flow [2024-11-24 01:47:28,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:28,256 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:47:28,256 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:28,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-24 01:47:28,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-24 01:47:28,457 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:47:28,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:28,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1958553992, now seen corresponding path program 6 times [2024-11-24 01:47:28,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:28,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263729070] [2024-11-24 01:47:28,458 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:47:28,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:28,485 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:47:28,485 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:28,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:28,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263729070] [2024-11-24 01:47:28,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263729070] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:47:28,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534063704] [2024-11-24 01:47:28,880 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:47:28,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:28,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:28,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:47:28,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:47:28,946 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:47:28,946 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:28,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:47:28,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:47:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:29,173 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:47:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:29,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534063704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:47:29,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:47:29,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2024-11-24 01:47:29,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814148177] [2024-11-24 01:47:29,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:47:29,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:47:29,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:29,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:47:29,512 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:47:29,534 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-24 01:47:29,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 210 transitions, 2035 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:29,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:47:29,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-24 01:47:29,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:47:31,084 INFO L124 PetriNetUnfolderBase]: 1907/3239 cut-off events. [2024-11-24 01:47:31,084 INFO L125 PetriNetUnfolderBase]: For 19414/19416 co-relation queries the response was YES. [2024-11-24 01:47:31,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15568 conditions, 3239 events. 1907/3239 cut-off events. For 19414/19416 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 17381 event pairs, 78 based on Foata normal form. 14/3253 useless extension candidates. Maximal degree in co-relation 14285. Up to 746 conditions per place. [2024-11-24 01:47:31,132 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 198 selfloop transitions, 312 changer transitions 7/538 dead transitions. [2024-11-24 01:47:31,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 538 transitions, 6468 flow [2024-11-24 01:47:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-24 01:47:31,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-24 01:47:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 168 transitions. [2024-11-24 01:47:31,134 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-11-24 01:47:31,134 INFO L175 Difference]: Start difference. First operand has 101 places, 210 transitions, 2035 flow. Second operand 19 states and 168 transitions. [2024-11-24 01:47:31,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 538 transitions, 6468 flow [2024-11-24 01:47:31,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 538 transitions, 6044 flow, removed 199 selfloop flow, removed 3 redundant places. [2024-11-24 01:47:31,310 INFO L231 Difference]: Finished difference. Result has 127 places, 433 transitions, 5497 flow [2024-11-24 01:47:31,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5497, PETRI_PLACES=127, PETRI_TRANSITIONS=433} [2024-11-24 01:47:31,311 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 104 predicate places. [2024-11-24 01:47:31,311 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 433 transitions, 5497 flow [2024-11-24 01:47:31,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:31,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:47:31,312 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:31,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-24 01:47:31,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:31,512 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:47:31,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:31,513 INFO L85 PathProgramCache]: Analyzing trace with hash 383367186, now seen corresponding path program 7 times [2024-11-24 01:47:31,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:31,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241630589] [2024-11-24 01:47:31,514 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:47:31,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:47:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:31,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:31,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241630589] [2024-11-24 01:47:31,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241630589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:47:31,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634221016] [2024-11-24 01:47:31,871 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:47:31,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:31,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:31,876 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:47:31,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:47:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:47:31,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:47:31,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:47:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:32,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:47:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:32,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634221016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:47:32,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:47:32,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2024-11-24 01:47:32,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872539815] [2024-11-24 01:47:32,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:47:32,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:47:32,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:32,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:47:32,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:47:32,383 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:47:32,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 433 transitions, 5497 flow. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:32,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:47:32,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:47:32,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:47:35,475 INFO L124 PetriNetUnfolderBase]: 3080/5055 cut-off events. [2024-11-24 01:47:35,475 INFO L125 PetriNetUnfolderBase]: For 49952/49952 co-relation queries the response was YES. [2024-11-24 01:47:35,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29300 conditions, 5055 events. 3080/5055 cut-off events. For 49952/49952 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 28396 event pairs, 54 based on Foata normal form. 82/5137 useless extension candidates. Maximal degree in co-relation 28879. Up to 1298 conditions per place. [2024-11-24 01:47:35,544 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 297 selfloop transitions, 680 changer transitions 1/979 dead transitions. [2024-11-24 01:47:35,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 979 transitions, 13677 flow [2024-11-24 01:47:35,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-24 01:47:35,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-24 01:47:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 334 transitions. [2024-11-24 01:47:35,548 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42985842985842987 [2024-11-24 01:47:35,548 INFO L175 Difference]: Start difference. First operand has 127 places, 433 transitions, 5497 flow. Second operand 37 states and 334 transitions. [2024-11-24 01:47:35,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 979 transitions, 13677 flow [2024-11-24 01:47:35,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 979 transitions, 13420 flow, removed 128 selfloop flow, removed 1 redundant places. [2024-11-24 01:47:35,929 INFO L231 Difference]: Finished difference. Result has 190 places, 865 transitions, 13421 flow [2024-11-24 01:47:35,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=5384, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=13421, PETRI_PLACES=190, PETRI_TRANSITIONS=865} [2024-11-24 01:47:35,931 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 167 predicate places. [2024-11-24 01:47:35,931 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 865 transitions, 13421 flow [2024-11-24 01:47:35,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:35,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:47:35,931 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:35,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-24 01:47:36,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:36,132 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:47:36,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:36,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1400371186, now seen corresponding path program 8 times [2024-11-24 01:47:36,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:36,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911335882] [2024-11-24 01:47:36,133 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:47:36,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:36,150 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:47:36,153 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:36,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:36,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911335882] [2024-11-24 01:47:36,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911335882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:47:36,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38558721] [2024-11-24 01:47:36,599 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:47:36,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:36,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:36,602 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:47:36,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 01:47:36,676 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:47:36,676 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:36,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:47:36,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:47:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:36,856 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:47:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:37,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38558721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:47:37,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:47:37,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2024-11-24 01:47:37,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296096705] [2024-11-24 01:47:37,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:47:37,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 01:47:37,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:37,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 01:47:37,160 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:47:37,164 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-24 01:47:37,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 865 transitions, 13421 flow. Second operand has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:37,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:47:37,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-24 01:47:37,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:47:41,198 INFO L124 PetriNetUnfolderBase]: 3514/5976 cut-off events. [2024-11-24 01:47:41,198 INFO L125 PetriNetUnfolderBase]: For 109842/109848 co-relation queries the response was YES. [2024-11-24 01:47:41,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42860 conditions, 5976 events. 3514/5976 cut-off events. For 109842/109848 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 36916 event pairs, 81 based on Foata normal form. 56/6030 useless extension candidates. Maximal degree in co-relation 42342. Up to 1579 conditions per place. [2024-11-24 01:47:41,274 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 275 selfloop transitions, 950 changer transitions 1/1261 dead transitions. [2024-11-24 01:47:41,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 1261 transitions, 21440 flow [2024-11-24 01:47:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-24 01:47:41,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-24 01:47:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 304 transitions. [2024-11-24 01:47:41,276 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-11-24 01:47:41,276 INFO L175 Difference]: Start difference. First operand has 190 places, 865 transitions, 13421 flow. Second operand 32 states and 304 transitions. [2024-11-24 01:47:41,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 1261 transitions, 21440 flow [2024-11-24 01:47:42,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 1261 transitions, 20138 flow, removed 643 selfloop flow, removed 2 redundant places. [2024-11-24 01:47:42,607 INFO L231 Difference]: Finished difference. Result has 236 places, 1164 transitions, 20538 flow [2024-11-24 01:47:42,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=12485, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=667, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=20538, PETRI_PLACES=236, PETRI_TRANSITIONS=1164} [2024-11-24 01:47:42,609 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 213 predicate places. [2024-11-24 01:47:42,609 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 1164 transitions, 20538 flow [2024-11-24 01:47:42,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.3125) internal successors, (101), 16 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:42,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:47:42,610 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:42,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 01:47:42,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-24 01:47:42,811 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:47:42,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:42,811 INFO L85 PathProgramCache]: Analyzing trace with hash 475759416, now seen corresponding path program 9 times [2024-11-24 01:47:42,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:42,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879310546] [2024-11-24 01:47:42,812 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:47:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:42,841 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:47:42,841 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:43,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:43,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879310546] [2024-11-24 01:47:43,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879310546] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:47:43,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490926070] [2024-11-24 01:47:43,127 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:47:43,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:43,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:43,131 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:47:43,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 01:47:43,203 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:47:43,203 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:43,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:47:43,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:47:43,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:43,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:47:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:43,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490926070] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:47:43,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:47:43,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2024-11-24 01:47:43,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707514084] [2024-11-24 01:47:43,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:47:43,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-24 01:47:43,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:43,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-24 01:47:43,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:47:43,647 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-24 01:47:43,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 1164 transitions, 20538 flow. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:43,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:47:43,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-24 01:47:43,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:47:47,603 INFO L124 PetriNetUnfolderBase]: 3515/5941 cut-off events. [2024-11-24 01:47:47,604 INFO L125 PetriNetUnfolderBase]: For 121417/121427 co-relation queries the response was YES. [2024-11-24 01:47:47,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47437 conditions, 5941 events. 3515/5941 cut-off events. For 121417/121427 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 36586 event pairs, 154 based on Foata normal form. 6/5945 useless extension candidates. Maximal degree in co-relation 47305. Up to 1583 conditions per place. [2024-11-24 01:47:47,685 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 361 selfloop transitions, 820 changer transitions 3/1219 dead transitions. [2024-11-24 01:47:47,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1219 transitions, 23590 flow [2024-11-24 01:47:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-24 01:47:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-24 01:47:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 211 transitions. [2024-11-24 01:47:47,687 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45670995670995673 [2024-11-24 01:47:47,687 INFO L175 Difference]: Start difference. First operand has 236 places, 1164 transitions, 20538 flow. Second operand 22 states and 211 transitions. [2024-11-24 01:47:47,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1219 transitions, 23590 flow [2024-11-24 01:47:49,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1219 transitions, 23313 flow, removed 126 selfloop flow, removed 4 redundant places. [2024-11-24 01:47:49,525 INFO L231 Difference]: Finished difference. Result has 253 places, 1167 transitions, 22509 flow [2024-11-24 01:47:49,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=20188, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=811, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=22509, PETRI_PLACES=253, PETRI_TRANSITIONS=1167} [2024-11-24 01:47:49,526 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 230 predicate places. [2024-11-24 01:47:49,526 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 1167 transitions, 22509 flow [2024-11-24 01:47:49,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:49,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:47:49,527 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:47:49,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-24 01:47:49,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-24 01:47:49,730 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:47:49,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:47:49,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1678835268, now seen corresponding path program 10 times [2024-11-24 01:47:49,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:47:49,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115633075] [2024-11-24 01:47:49,731 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:47:49,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:47:49,757 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:47:49,757 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:50,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:47:50,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115633075] [2024-11-24 01:47:50,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115633075] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:47:50,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435281080] [2024-11-24 01:47:50,054 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:47:50,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:47:50,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:47:50,057 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:47:50,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 01:47:50,272 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:47:50,272 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:47:50,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:47:50,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:47:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:50,451 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:47:50,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:47:50,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435281080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:47:50,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:47:50,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2024-11-24 01:47:50,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294124844] [2024-11-24 01:47:50,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:47:50,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:47:50,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:47:50,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:47:50,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:47:50,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:47:50,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 1167 transitions, 22509 flow. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:47:50,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:47:50,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:47:50,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:47:57,196 INFO L124 PetriNetUnfolderBase]: 5953/9749 cut-off events. [2024-11-24 01:47:57,196 INFO L125 PetriNetUnfolderBase]: For 274744/274744 co-relation queries the response was YES. [2024-11-24 01:47:57,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84666 conditions, 9749 events. 5953/9749 cut-off events. For 274744/274744 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 62474 event pairs, 92 based on Foata normal form. 130/9879 useless extension candidates. Maximal degree in co-relation 84459. Up to 2635 conditions per place. [2024-11-24 01:47:57,339 INFO L140 encePairwiseOnDemand]: 10/21 looper letters, 626 selfloop transitions, 1617 changer transitions 7/2251 dead transitions. [2024-11-24 01:47:57,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 2251 transitions, 47634 flow [2024-11-24 01:47:57,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-24 01:47:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-24 01:47:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 403 transitions. [2024-11-24 01:47:57,342 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4083080040526849 [2024-11-24 01:47:57,342 INFO L175 Difference]: Start difference. First operand has 253 places, 1167 transitions, 22509 flow. Second operand 47 states and 403 transitions. [2024-11-24 01:47:57,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 2251 transitions, 47634 flow [2024-11-24 01:48:01,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 2251 transitions, 46758 flow, removed 25 selfloop flow, removed 16 redundant places. [2024-11-24 01:48:01,416 INFO L231 Difference]: Finished difference. Result has 301 places, 2039 transitions, 45539 flow [2024-11-24 01:48:01,417 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=21913, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=843, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=45539, PETRI_PLACES=301, PETRI_TRANSITIONS=2039} [2024-11-24 01:48:01,418 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 278 predicate places. [2024-11-24 01:48:01,418 INFO L471 AbstractCegarLoop]: Abstraction has has 301 places, 2039 transitions, 45539 flow [2024-11-24 01:48:01,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 19 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:48:01,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:48:01,418 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:48:01,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-24 01:48:01,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-24 01:48:01,619 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:48:01,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:48:01,620 INFO L85 PathProgramCache]: Analyzing trace with hash 53273690, now seen corresponding path program 11 times [2024-11-24 01:48:01,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:48:01,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307552621] [2024-11-24 01:48:01,620 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:48:01,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:48:01,635 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:48:01,636 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:48:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:48:01,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:48:01,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307552621] [2024-11-24 01:48:01,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307552621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:48:01,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124015082] [2024-11-24 01:48:01,857 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:48:01,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:48:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:48:01,860 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:48:01,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 01:48:01,926 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:48:01,926 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:48:01,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:48:01,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:48:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:48:02,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:48:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:48:02,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124015082] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:48:02,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:48:02,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-11-24 01:48:02,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614933639] [2024-11-24 01:48:02,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:48:02,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:48:02,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:48:02,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:48:02,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:48:02,449 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-24 01:48:02,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 2039 transitions, 45539 flow. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:48:02,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:48:02,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-24 01:48:02,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:48:11,455 INFO L124 PetriNetUnfolderBase]: 6202/10403 cut-off events. [2024-11-24 01:48:11,455 INFO L125 PetriNetUnfolderBase]: For 313752/313788 co-relation queries the response was YES. [2024-11-24 01:48:11,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103536 conditions, 10403 events. 6202/10403 cut-off events. For 313752/313788 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 70564 event pairs, 486 based on Foata normal form. 20/10419 useless extension candidates. Maximal degree in co-relation 102824. Up to 3442 conditions per place. [2024-11-24 01:48:11,656 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 699 selfloop transitions, 1634 changer transitions 4/2415 dead transitions. [2024-11-24 01:48:11,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 2415 transitions, 58788 flow [2024-11-24 01:48:11,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-24 01:48:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-24 01:48:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 250 transitions. [2024-11-24 01:48:11,659 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4409171075837742 [2024-11-24 01:48:11,659 INFO L175 Difference]: Start difference. First operand has 301 places, 2039 transitions, 45539 flow. Second operand 27 states and 250 transitions. [2024-11-24 01:48:11,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 2415 transitions, 58788 flow [2024-11-24 01:48:19,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 2415 transitions, 56532 flow, removed 1028 selfloop flow, removed 10 redundant places. [2024-11-24 01:48:19,987 INFO L231 Difference]: Finished difference. Result has 334 places, 2356 transitions, 57880 flow [2024-11-24 01:48:19,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=44097, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=57880, PETRI_PLACES=334, PETRI_TRANSITIONS=2356} [2024-11-24 01:48:19,989 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 311 predicate places. [2024-11-24 01:48:19,989 INFO L471 AbstractCegarLoop]: Abstraction has has 334 places, 2356 transitions, 57880 flow [2024-11-24 01:48:19,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:48:19,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:48:19,989 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:48:19,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-24 01:48:20,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-24 01:48:20,190 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:48:20,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:48:20,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1727385962, now seen corresponding path program 12 times [2024-11-24 01:48:20,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:48:20,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169529098] [2024-11-24 01:48:20,191 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:48:20,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:48:20,219 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-24 01:48:20,223 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:48:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:48:20,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:48:20,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169529098] [2024-11-24 01:48:20,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169529098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:48:20,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963414309] [2024-11-24 01:48:20,571 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:48:20,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:48:20,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:48:20,574 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:48:20,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 01:48:20,640 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-24 01:48:20,641 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:48:20,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:48:20,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:48:20,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:48:20,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:48:21,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:48:21,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963414309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:48:21,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:48:21,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2024-11-24 01:48:21,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913906477] [2024-11-24 01:48:21,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:48:21,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 01:48:21,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:48:21,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 01:48:21,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-11-24 01:48:21,044 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-24 01:48:21,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 2356 transitions, 57880 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:48:21,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:48:21,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-24 01:48:21,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:48:32,303 INFO L124 PetriNetUnfolderBase]: 6808/11462 cut-off events. [2024-11-24 01:48:32,303 INFO L125 PetriNetUnfolderBase]: For 310922/310962 co-relation queries the response was YES. [2024-11-24 01:48:32,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120679 conditions, 11462 events. 6808/11462 cut-off events. For 310922/310962 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 78932 event pairs, 122 based on Foata normal form. 114/11572 useless extension candidates. Maximal degree in co-relation 120538. Up to 3112 conditions per place. [2024-11-24 01:48:32,585 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 274 selfloop transitions, 2382 changer transitions 4/2738 dead transitions. [2024-11-24 01:48:32,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 2738 transitions, 72045 flow [2024-11-24 01:48:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-24 01:48:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-24 01:48:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 292 transitions. [2024-11-24 01:48:32,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-11-24 01:48:32,588 INFO L175 Difference]: Start difference. First operand has 334 places, 2356 transitions, 57880 flow. Second operand 32 states and 292 transitions. [2024-11-24 01:48:32,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 2738 transitions, 72045 flow [2024-11-24 01:48:44,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 2738 transitions, 71805 flow, removed 93 selfloop flow, removed 8 redundant places. [2024-11-24 01:48:45,112 INFO L231 Difference]: Finished difference. Result has 360 places, 2656 transitions, 74136 flow [2024-11-24 01:48:45,114 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=56929, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2058, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=74136, PETRI_PLACES=360, PETRI_TRANSITIONS=2656} [2024-11-24 01:48:45,115 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 337 predicate places. [2024-11-24 01:48:45,115 INFO L471 AbstractCegarLoop]: Abstraction has has 360 places, 2656 transitions, 74136 flow [2024-11-24 01:48:45,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:48:45,116 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:48:45,116 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:48:45,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-24 01:48:45,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-24 01:48:45,320 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:48:45,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:48:45,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1729108360, now seen corresponding path program 13 times [2024-11-24 01:48:45,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:48:45,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898835087] [2024-11-24 01:48:45,321 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:48:45,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:48:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:48:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:48:45,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:48:45,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898835087] [2024-11-24 01:48:45,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898835087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:48:45,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305230883] [2024-11-24 01:48:45,551 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 01:48:45,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:48:45,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:48:45,553 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:48:45,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 01:48:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:48:45,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:48:45,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:48:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:48:45,830 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:48:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:48:46,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305230883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:48:46,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:48:46,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2024-11-24 01:48:46,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571334097] [2024-11-24 01:48:46,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:48:46,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-24 01:48:46,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:48:46,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-24 01:48:46,048 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2024-11-24 01:48:46,056 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-24 01:48:46,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 2656 transitions, 74136 flow. Second operand has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:48:46,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:48:46,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-24 01:48:46,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:49:00,908 INFO L124 PetriNetUnfolderBase]: 7471/12636 cut-off events. [2024-11-24 01:49:00,909 INFO L125 PetriNetUnfolderBase]: For 449354/449378 co-relation queries the response was YES. [2024-11-24 01:49:01,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147839 conditions, 12636 events. 7471/12636 cut-off events. For 449354/449378 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 89319 event pairs, 325 based on Foata normal form. 73/12707 useless extension candidates. Maximal degree in co-relation 147237. Up to 3354 conditions per place. [2024-11-24 01:49:01,241 INFO L140 encePairwiseOnDemand]: 13/21 looper letters, 661 selfloop transitions, 2294 changer transitions 2/3035 dead transitions. [2024-11-24 01:49:01,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 3035 transitions, 90194 flow [2024-11-24 01:49:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-24 01:49:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-24 01:49:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 230 transitions. [2024-11-24 01:49:01,243 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-11-24 01:49:01,243 INFO L175 Difference]: Start difference. First operand has 360 places, 2656 transitions, 74136 flow. Second operand 23 states and 230 transitions. [2024-11-24 01:49:01,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 3035 transitions, 90194 flow [2024-11-24 01:49:17,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 3035 transitions, 89426 flow, removed 257 selfloop flow, removed 12 redundant places. [2024-11-24 01:49:17,844 INFO L231 Difference]: Finished difference. Result has 379 places, 2938 transitions, 91098 flow [2024-11-24 01:49:17,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=73390, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2027, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=91098, PETRI_PLACES=379, PETRI_TRANSITIONS=2938} [2024-11-24 01:49:17,846 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 356 predicate places. [2024-11-24 01:49:17,846 INFO L471 AbstractCegarLoop]: Abstraction has has 379 places, 2938 transitions, 91098 flow [2024-11-24 01:49:17,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0) internal successors, (102), 17 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:49:17,847 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:49:17,847 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:49:17,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-24 01:49:18,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-24 01:49:18,051 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:49:18,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:49:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1798557726, now seen corresponding path program 14 times [2024-11-24 01:49:18,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:49:18,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722378562] [2024-11-24 01:49:18,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:49:18,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:49:18,063 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:49:18,064 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:49:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:49:18,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:49:18,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722378562] [2024-11-24 01:49:18,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722378562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:49:18,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911186174] [2024-11-24 01:49:18,263 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:49:18,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:49:18,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:49:18,266 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:49:18,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-24 01:49:18,324 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:49:18,324 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:49:18,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:49:18,326 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:49:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:49:18,491 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:49:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:49:18,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911186174] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:49:18,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:49:18,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2024-11-24 01:49:18,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272569174] [2024-11-24 01:49:18,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:49:18,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 01:49:18,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:49:18,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 01:49:18,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:49:18,689 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-24 01:49:18,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 2938 transitions, 91098 flow. Second operand has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:49:18,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:49:18,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-24 01:49:18,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:49:32,775 INFO L124 PetriNetUnfolderBase]: 7464/12583 cut-off events. [2024-11-24 01:49:32,775 INFO L125 PetriNetUnfolderBase]: For 533078/533106 co-relation queries the response was YES. [2024-11-24 01:49:33,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160774 conditions, 12583 events. 7464/12583 cut-off events. For 533078/533106 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 88495 event pairs, 441 based on Foata normal form. 14/12595 useless extension candidates. Maximal degree in co-relation 160118. Up to 3362 conditions per place. [2024-11-24 01:49:33,129 INFO L140 encePairwiseOnDemand]: 12/21 looper letters, 513 selfloop transitions, 2469 changer transitions 5/3065 dead transitions. [2024-11-24 01:49:33,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 3065 transitions, 99986 flow [2024-11-24 01:49:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-24 01:49:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-24 01:49:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 203 transitions. [2024-11-24 01:49:33,131 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-11-24 01:49:33,131 INFO L175 Difference]: Start difference. First operand has 379 places, 2938 transitions, 91098 flow. Second operand 22 states and 203 transitions. [2024-11-24 01:49:33,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 3065 transitions, 99986 flow [2024-11-24 01:49:50,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 3065 transitions, 99640 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-11-24 01:49:50,674 INFO L231 Difference]: Finished difference. Result has 396 places, 3005 transitions, 100920 flow [2024-11-24 01:49:50,676 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=90681, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=100920, PETRI_PLACES=396, PETRI_TRANSITIONS=3005} [2024-11-24 01:49:50,676 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 373 predicate places. [2024-11-24 01:49:50,676 INFO L471 AbstractCegarLoop]: Abstraction has has 396 places, 3005 transitions, 100920 flow [2024-11-24 01:49:50,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.25) internal successors, (100), 16 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:49:50,677 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:49:50,677 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:49:50,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-24 01:49:50,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-24 01:49:50,877 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:49:50,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:49:50,878 INFO L85 PathProgramCache]: Analyzing trace with hash 348564442, now seen corresponding path program 15 times [2024-11-24 01:49:50,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:49:50,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885955431] [2024-11-24 01:49:50,878 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 01:49:50,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:49:50,892 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-24 01:49:50,892 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:49:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:49:51,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:49:51,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885955431] [2024-11-24 01:49:51,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885955431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:49:51,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:49:51,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-24 01:49:51,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318537381] [2024-11-24 01:49:51,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:49:51,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-24 01:49:51,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:49:51,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-24 01:49:51,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-24 01:49:51,070 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-24 01:49:51,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 3005 transitions, 100920 flow. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:49:51,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:49:51,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-24 01:49:51,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:50:07,286 INFO L124 PetriNetUnfolderBase]: 7491/12624 cut-off events. [2024-11-24 01:50:07,286 INFO L125 PetriNetUnfolderBase]: For 585990/586071 co-relation queries the response was YES. [2024-11-24 01:50:07,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172880 conditions, 12624 events. 7491/12624 cut-off events. For 585990/586071 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 88205 event pairs, 1762 based on Foata normal form. 2/12619 useless extension candidates. Maximal degree in co-relation 172167. Up to 9914 conditions per place. [2024-11-24 01:50:07,559 INFO L140 encePairwiseOnDemand]: 14/21 looper letters, 2698 selfloop transitions, 257 changer transitions 4/3037 dead transitions. [2024-11-24 01:50:07,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 3037 transitions, 107395 flow [2024-11-24 01:50:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:50:07,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:50:07,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2024-11-24 01:50:07,561 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-11-24 01:50:07,561 INFO L175 Difference]: Start difference. First operand has 396 places, 3005 transitions, 100920 flow. Second operand 8 states and 71 transitions. [2024-11-24 01:50:07,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 3037 transitions, 107395 flow [2024-11-24 01:50:31,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 3037 transitions, 105754 flow, removed 313 selfloop flow, removed 13 redundant places. [2024-11-24 01:50:31,713 INFO L231 Difference]: Finished difference. Result has 392 places, 3014 transitions, 100078 flow [2024-11-24 01:50:31,715 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=99299, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=100078, PETRI_PLACES=392, PETRI_TRANSITIONS=3014} [2024-11-24 01:50:31,719 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 369 predicate places. [2024-11-24 01:50:31,719 INFO L471 AbstractCegarLoop]: Abstraction has has 392 places, 3014 transitions, 100078 flow [2024-11-24 01:50:31,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 8 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:50:31,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:50:31,719 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:50:31,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-24 01:50:31,720 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:50:31,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:50:31,720 INFO L85 PathProgramCache]: Analyzing trace with hash -219457216, now seen corresponding path program 16 times [2024-11-24 01:50:31,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:50:31,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917469525] [2024-11-24 01:50:31,721 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:50:31,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:50:31,757 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:50:31,761 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:50:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:50:32,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:50:32,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917469525] [2024-11-24 01:50:32,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917469525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:50:32,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229386798] [2024-11-24 01:50:32,382 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 01:50:32,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:50:32,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:50:32,384 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:50:32,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 01:50:32,438 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 01:50:32,438 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:50:32,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:50:32,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:50:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:50:32,707 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:50:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:50:33,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229386798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:50:33,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:50:33,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 25 [2024-11-24 01:50:33,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403535222] [2024-11-24 01:50:33,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:50:33,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:50:33,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:50:33,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:50:33,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:50:33,104 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 21 [2024-11-24 01:50:33,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 3014 transitions, 100078 flow. Second operand has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:50:33,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:50:33,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 21 [2024-11-24 01:50:33,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:50:54,342 INFO L124 PetriNetUnfolderBase]: 10253/16943 cut-off events. [2024-11-24 01:50:54,343 INFO L125 PetriNetUnfolderBase]: For 737357/737357 co-relation queries the response was YES. [2024-11-24 01:50:54,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226489 conditions, 16943 events. 10253/16943 cut-off events. For 737357/737357 co-relation queries the response was YES. Maximal size of possible extension queue 725. Compared 120935 event pairs, 80 based on Foata normal form. 133/17076 useless extension candidates. Maximal degree in co-relation 222549. Up to 4450 conditions per place. [2024-11-24 01:50:54,746 INFO L140 encePairwiseOnDemand]: 11/21 looper letters, 1737 selfloop transitions, 2844 changer transitions 1/4583 dead transitions. [2024-11-24 01:50:54,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 4583 transitions, 161301 flow [2024-11-24 01:50:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-24 01:50:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-24 01:50:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 334 transitions. [2024-11-24 01:50:54,748 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3786848072562358 [2024-11-24 01:50:54,748 INFO L175 Difference]: Start difference. First operand has 392 places, 3014 transitions, 100078 flow. Second operand 42 states and 334 transitions. [2024-11-24 01:50:54,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 4583 transitions, 161301 flow [2024-11-24 01:51:24,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 4583 transitions, 160622 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-24 01:51:25,066 INFO L231 Difference]: Finished difference. Result has 447 places, 4069 transitions, 146609 flow [2024-11-24 01:51:25,069 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=99575, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1802, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1041, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=146609, PETRI_PLACES=447, PETRI_TRANSITIONS=4069} [2024-11-24 01:51:25,069 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 424 predicate places. [2024-11-24 01:51:25,069 INFO L471 AbstractCegarLoop]: Abstraction has has 447 places, 4069 transitions, 146609 flow [2024-11-24 01:51:25,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.04) internal successors, (126), 25 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:51:25,071 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:51:25,071 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:51:25,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-24 01:51:25,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-24 01:51:25,275 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:51:25,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:51:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash 323503348, now seen corresponding path program 17 times [2024-11-24 01:51:25,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:51:25,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672551364] [2024-11-24 01:51:25,276 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 01:51:25,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:51:25,285 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:51:25,285 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:51:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:51:25,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:51:25,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672551364] [2024-11-24 01:51:25,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672551364] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:51:25,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:51:25,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-24 01:51:25,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368549379] [2024-11-24 01:51:25,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:51:25,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 01:51:25,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:51:25,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 01:51:25,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-24 01:51:25,497 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 21 [2024-11-24 01:51:25,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 4069 transitions, 146609 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:51:25,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:51:25,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 21 [2024-11-24 01:51:25,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:51:46,588 INFO L124 PetriNetUnfolderBase]: 8878/15533 cut-off events. [2024-11-24 01:51:46,588 INFO L125 PetriNetUnfolderBase]: For 865108/865205 co-relation queries the response was YES. [2024-11-24 01:51:46,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236384 conditions, 15533 events. 8878/15533 cut-off events. For 865108/865205 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 119019 event pairs, 1640 based on Foata normal form. 22/15454 useless extension candidates. Maximal degree in co-relation 233283. Up to 10423 conditions per place. [2024-11-24 01:51:47,185 INFO L140 encePairwiseOnDemand]: 15/21 looper letters, 2973 selfloop transitions, 371 changer transitions 0/4121 dead transitions. [2024-11-24 01:51:47,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 4121 transitions, 154769 flow [2024-11-24 01:51:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:51:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:51:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 89 transitions. [2024-11-24 01:51:47,187 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-11-24 01:51:47,187 INFO L175 Difference]: Start difference. First operand has 447 places, 4069 transitions, 146609 flow. Second operand 9 states and 89 transitions. [2024-11-24 01:51:47,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 4121 transitions, 154769 flow [2024-11-24 01:52:24,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 4121 transitions, 154006 flow, removed 324 selfloop flow, removed 7 redundant places. [2024-11-24 01:52:24,154 INFO L231 Difference]: Finished difference. Result has 451 places, 4102 transitions, 147950 flow [2024-11-24 01:52:24,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=21, PETRI_DIFFERENCE_MINUEND_FLOW=145936, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=147950, PETRI_PLACES=451, PETRI_TRANSITIONS=4102} [2024-11-24 01:52:24,157 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 428 predicate places. [2024-11-24 01:52:24,157 INFO L471 AbstractCegarLoop]: Abstraction has has 451 places, 4102 transitions, 147950 flow [2024-11-24 01:52:24,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:52:24,157 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:52:24,157 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:52:24,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-24 01:52:24,158 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-24 01:52:24,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:52:24,158 INFO L85 PathProgramCache]: Analyzing trace with hash 854910708, now seen corresponding path program 18 times [2024-11-24 01:52:24,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:52:24,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106234670] [2024-11-24 01:52:24,159 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:52:24,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:52:24,169 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:52:24,169 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:52:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:52:24,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:52:24,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106234670] [2024-11-24 01:52:24,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106234670] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:52:24,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199726586] [2024-11-24 01:52:24,341 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 01:52:24,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:52:24,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:52:24,343 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:52:24,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab2191e6-4985-4333-936d-ba7aab6856fd/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-24 01:52:24,404 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-24 01:52:24,405 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:52:24,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 01:52:24,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:52:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:52:24,568 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:52:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:52:25,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199726586] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:52:25,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:52:25,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2024-11-24 01:52:25,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97305483] [2024-11-24 01:52:25,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:52:25,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 01:52:25,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:52:25,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 01:52:25,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2024-11-24 01:52:25,536 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 21 [2024-11-24 01:52:25,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 4102 transitions, 147950 flow. Second operand has 16 states, 16 states have (on average 5.9375) internal successors, (95), 16 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:52:25,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:52:25,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 21 [2024-11-24 01:52:25,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand