./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.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_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/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_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/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_0ce4054e-7df6-433c-9d79-0edb20c49ba6/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 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 22:35:09,833 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 22:35:09,929 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-23 22:35:09,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 22:35:09,934 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 22:35:09,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 22:35:09,973 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 22:35:09,974 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 22:35:09,974 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 22:35:09,975 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 22:35:09,976 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 22:35:09,976 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 22:35:09,976 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 22:35:09,976 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 22:35:09,976 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 22:35:09,977 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 22:35:09,977 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-23 22:35:09,977 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 22:35:09,977 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 22:35:09,977 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 22:35:09,977 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 22:35:09,977 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-23 22:35:09,977 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 22:35:09,977 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-23 22:35:09,977 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 22:35:09,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-23 22:35:09,978 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 22:35:09,978 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 22:35:09,978 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 22:35:09,978 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:35:09,978 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:35:09,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:35:09,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:35:09,979 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 22:35:09,979 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:35:09,979 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:35:09,979 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:35:09,979 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:35:09,980 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 22:35:09,980 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 22:35:09,980 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-23 22:35:09,980 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-23 22:35:09,980 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 22:35:09,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 22:35:09,980 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 22:35:09,981 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 22:35:09,981 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 22:35:09,981 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 22:35:09,981 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_0ce4054e-7df6-433c-9d79-0edb20c49ba6/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 -> 3855d6da0b439f4c6a497e897f140f408df8c7fd65e3042f0fafae1979048a3d [2024-11-23 22:35:10,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 22:35:10,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 22:35:10,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 22:35:10,324 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 22:35:10,324 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 22:35:10,327 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2024-11-23 22:35:13,513 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/data/9f704d552/c5e8c2995bd6483aa459700d3395b109/FLAG5e359f8fd [2024-11-23 22:35:13,832 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 22:35:13,833 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c [2024-11-23 22:35:13,842 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/data/9f704d552/c5e8c2995bd6483aa459700d3395b109/FLAG5e359f8fd [2024-11-23 22:35:14,107 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/data/9f704d552/c5e8c2995bd6483aa459700d3395b109 [2024-11-23 22:35:14,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 22:35:14,115 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 22:35:14,117 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 22:35:14,117 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 22:35:14,122 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 22:35:14,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,126 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1628c334 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14, skipping insertion in model container [2024-11-23 22:35:14,126 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,149 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 22:35:14,404 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_0ce4054e-7df6-433c-9d79-0edb20c49ba6/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4875,4888] [2024-11-23 22:35:14,419 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:35:14,431 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 22:35:14,483 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_0ce4054e-7df6-433c-9d79-0edb20c49ba6/sv-benchmarks/c/weaver/chl-name-comparator-subst.wvr.c[4875,4888] [2024-11-23 22:35:14,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:35:14,514 INFO L204 MainTranslator]: Completed translation [2024-11-23 22:35:14,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14 WrapperNode [2024-11-23 22:35:14,517 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 22:35:14,518 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 22:35:14,518 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 22:35:14,518 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 22:35:14,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,539 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,588 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 300 [2024-11-23 22:35:14,589 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 22:35:14,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 22:35:14,589 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 22:35:14,589 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 22:35:14,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,607 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,624 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-23 22:35:14,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,633 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,634 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,639 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,640 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,642 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,645 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 22:35:14,646 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 22:35:14,646 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 22:35:14,646 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 22:35:14,647 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (1/1) ... [2024-11-23 22:35:14,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:35:14,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:35:14,685 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 22:35:14,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 22:35:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 22:35:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 22:35:14,724 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 22:35:14,724 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 22:35:14,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 22:35:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 22:35:14,725 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 22:35:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 22:35:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 22:35:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 22:35:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 22:35:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 22:35:14,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 22:35:14,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 22:35:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 22:35:14,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 22:35:14,728 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 22:35:14,872 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 22:35:14,874 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 22:35:15,488 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 22:35:15,488 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 22:35:16,113 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 22:35:16,114 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-23 22:35:16,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:35:16 BoogieIcfgContainer [2024-11-23 22:35:16,115 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 22:35:16,117 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 22:35:16,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 22:35:16,123 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 22:35:16,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:35:14" (1/3) ... [2024-11-23 22:35:16,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fd6382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:35:16, skipping insertion in model container [2024-11-23 22:35:16,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:35:14" (2/3) ... [2024-11-23 22:35:16,126 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fd6382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:35:16, skipping insertion in model container [2024-11-23 22:35:16,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:35:16" (3/3) ... [2024-11-23 22:35:16,128 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-subst.wvr.c [2024-11-23 22:35:16,147 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 22:35:16,148 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-name-comparator-subst.wvr.c that has 4 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-23 22:35:16,149 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 22:35:16,245 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 22:35:16,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 36 transitions, 93 flow [2024-11-23 22:35:16,340 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2024-11-23 22:35:16,343 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 22:35:16,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 33 events. 7/33 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-11-23 22:35:16,348 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 36 transitions, 93 flow [2024-11-23 22:35:16,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 32 transitions, 82 flow [2024-11-23 22:35:16,367 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 22:35:16,384 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;@36a445d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 22:35:16,385 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-23 22:35:16,411 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 22:35:16,412 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2024-11-23 22:35:16,412 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 22:35:16,412 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:16,413 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:16,414 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:16,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:16,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2112718655, now seen corresponding path program 1 times [2024-11-23 22:35:16,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:16,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635285712] [2024-11-23 22:35:16,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:35:16,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:35:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:35:16,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:16,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635285712] [2024-11-23 22:35:16,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635285712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:16,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:16,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:35:16,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52074294] [2024-11-23 22:35:16,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:16,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 22:35:16,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:16,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 22:35:16,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 22:35:16,813 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:16,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:16,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:16,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:16,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:17,256 INFO L124 PetriNetUnfolderBase]: 792/1137 cut-off events. [2024-11-23 22:35:17,256 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-11-23 22:35:17,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2371 conditions, 1137 events. 792/1137 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3709 event pairs, 608 based on Foata normal form. 0/953 useless extension candidates. Maximal degree in co-relation 2150. Up to 1137 conditions per place. [2024-11-23 22:35:17,268 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 28 selfloop transitions, 0 changer transitions 0/29 dead transitions. [2024-11-23 22:35:17,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 132 flow [2024-11-23 22:35:17,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 22:35:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-23 22:35:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 39 transitions. [2024-11-23 22:35:17,281 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-23 22:35:17,282 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 82 flow. Second operand 2 states and 39 transitions. [2024-11-23 22:35:17,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 132 flow [2024-11-23 22:35:17,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 120 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 22:35:17,291 INFO L231 Difference]: Finished difference. Result has 30 places, 29 transitions, 64 flow [2024-11-23 22:35:17,295 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2024-11-23 22:35:17,300 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -5 predicate places. [2024-11-23 22:35:17,301 INFO L471 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 64 flow [2024-11-23 22:35:17,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:17,301 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:17,301 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:17,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 22:35:17,302 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:17,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:17,302 INFO L85 PathProgramCache]: Analyzing trace with hash -304056944, now seen corresponding path program 1 times [2024-11-23 22:35:17,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:17,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741866554] [2024-11-23 22:35:17,303 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:35:17,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:35:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:35:17,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:17,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741866554] [2024-11-23 22:35:17,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741866554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:17,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:17,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:35:17,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457692660] [2024-11-23 22:35:17,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:17,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:35:17,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:17,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:35:17,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:35:17,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:17,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:17,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:17,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:17,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:17,968 INFO L124 PetriNetUnfolderBase]: 792/1138 cut-off events. [2024-11-23 22:35:17,968 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-23 22:35:17,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2309 conditions, 1138 events. 792/1138 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3704 event pairs, 608 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 2306. Up to 1137 conditions per place. [2024-11-23 22:35:17,983 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 27 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-11-23 22:35:17,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 124 flow [2024-11-23 22:35:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:35:17,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 22:35:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2024-11-23 22:35:17,985 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-11-23 22:35:17,985 INFO L175 Difference]: Start difference. First operand has 30 places, 29 transitions, 64 flow. Second operand 3 states and 42 transitions. [2024-11-23 22:35:17,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 124 flow [2024-11-23 22:35:17,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 22:35:17,989 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 76 flow [2024-11-23 22:35:17,989 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-11-23 22:35:17,991 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, -2 predicate places. [2024-11-23 22:35:17,991 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 76 flow [2024-11-23 22:35:17,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:17,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:17,992 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:17,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 22:35:17,993 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:17,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:17,994 INFO L85 PathProgramCache]: Analyzing trace with hash -873947199, now seen corresponding path program 1 times [2024-11-23 22:35:17,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:17,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360270194] [2024-11-23 22:35:17,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:35:17,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:35:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:35:18,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:18,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360270194] [2024-11-23 22:35:18,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360270194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:35:18,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768087549] [2024-11-23 22:35:18,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:35:18,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:35:18,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:35:18,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:35:18,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 22:35:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:35:18,447 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-23 22:35:18,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:35:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:35:18,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:35:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:35:18,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768087549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:35:18,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:35:18,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-23 22:35:18,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738650351] [2024-11-23 22:35:18,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:35:18,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 22:35:18,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:18,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 22:35:18,564 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-23 22:35:18,564 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:18,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 76 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:18,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:18,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:18,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:18,920 INFO L124 PetriNetUnfolderBase]: 792/1140 cut-off events. [2024-11-23 22:35:18,921 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-23 22:35:18,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2322 conditions, 1140 events. 792/1140 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3704 event pairs, 608 based on Foata normal form. 0/956 useless extension candidates. Maximal degree in co-relation 2317. Up to 1137 conditions per place. [2024-11-23 22:35:18,927 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 27 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-11-23 22:35:18,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 146 flow [2024-11-23 22:35:18,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 22:35:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 22:35:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-11-23 22:35:18,931 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.29444444444444445 [2024-11-23 22:35:18,931 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 76 flow. Second operand 5 states and 53 transitions. [2024-11-23 22:35:18,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 146 flow [2024-11-23 22:35:18,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-23 22:35:18,932 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 98 flow [2024-11-23 22:35:18,933 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2024-11-23 22:35:18,935 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2024-11-23 22:35:18,935 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 98 flow [2024-11-23 22:35:18,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:18,936 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:18,936 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:18,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 22:35:19,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:35:19,137 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:19,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:19,137 INFO L85 PathProgramCache]: Analyzing trace with hash 730602913, now seen corresponding path program 2 times [2024-11-23 22:35:19,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:19,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240327368] [2024-11-23 22:35:19,138 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:35:19,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:19,243 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 22:35:19,244 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:35:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:20,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:20,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240327368] [2024-11-23 22:35:20,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240327368] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:20,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:20,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 22:35:20,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512183369] [2024-11-23 22:35:20,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:20,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 22:35:20,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:20,171 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 22:35:20,171 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:35:20,171 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:20,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:20,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:20,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:20,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:20,995 INFO L124 PetriNetUnfolderBase]: 1926/2789 cut-off events. [2024-11-23 22:35:20,995 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-23 22:35:20,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5646 conditions, 2789 events. 1926/2789 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11941 event pairs, 608 based on Foata normal form. 1/2306 useless extension candidates. Maximal degree in co-relation 5639. Up to 1184 conditions per place. [2024-11-23 22:35:21,009 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 75 selfloop transitions, 7 changer transitions 11/94 dead transitions. [2024-11-23 22:35:21,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 94 transitions, 421 flow [2024-11-23 22:35:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:35:21,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 22:35:21,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-11-23 22:35:21,014 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5324074074074074 [2024-11-23 22:35:21,014 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 98 flow. Second operand 6 states and 115 transitions. [2024-11-23 22:35:21,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 94 transitions, 421 flow [2024-11-23 22:35:21,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 94 transitions, 411 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-23 22:35:21,018 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 139 flow [2024-11-23 22:35:21,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=139, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-11-23 22:35:21,019 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 11 predicate places. [2024-11-23 22:35:21,019 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 139 flow [2024-11-23 22:35:21,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:21,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:21,019 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:21,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 22:35:21,020 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:21,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash -206697169, now seen corresponding path program 3 times [2024-11-23 22:35:21,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:21,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645785712] [2024-11-23 22:35:21,021 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:35:21,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:21,068 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-23 22:35:21,069 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:35:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:21,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:21,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645785712] [2024-11-23 22:35:21,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645785712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:21,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:21,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 22:35:21,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792754815] [2024-11-23 22:35:21,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:21,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 22:35:21,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:21,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 22:35:21,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:35:21,784 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:21,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 139 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:21,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:21,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:21,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:22,797 INFO L124 PetriNetUnfolderBase]: 2953/4259 cut-off events. [2024-11-23 22:35:22,798 INFO L125 PetriNetUnfolderBase]: For 1350/1350 co-relation queries the response was YES. [2024-11-23 22:35:22,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10364 conditions, 4259 events. 2953/4259 cut-off events. For 1350/1350 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 19029 event pairs, 1209 based on Foata normal form. 1/4030 useless extension candidates. Maximal degree in co-relation 10352. Up to 2089 conditions per place. [2024-11-23 22:35:22,836 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 74 selfloop transitions, 8 changer transitions 11/94 dead transitions. [2024-11-23 22:35:22,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 94 transitions, 486 flow [2024-11-23 22:35:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:35:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 22:35:22,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-11-23 22:35:22,842 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4861111111111111 [2024-11-23 22:35:22,842 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 139 flow. Second operand 6 states and 105 transitions. [2024-11-23 22:35:22,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 94 transitions, 486 flow [2024-11-23 22:35:22,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 94 transitions, 482 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-23 22:35:22,851 INFO L231 Difference]: Finished difference. Result has 53 places, 42 transitions, 196 flow [2024-11-23 22:35:22,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=53, PETRI_TRANSITIONS=42} [2024-11-23 22:35:22,852 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 18 predicate places. [2024-11-23 22:35:22,852 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 42 transitions, 196 flow [2024-11-23 22:35:22,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:22,853 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:22,853 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:22,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-23 22:35:22,853 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:22,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:22,854 INFO L85 PathProgramCache]: Analyzing trace with hash 164032703, now seen corresponding path program 4 times [2024-11-23 22:35:22,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:22,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568215183] [2024-11-23 22:35:22,855 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 22:35:22,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:22,914 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 22:35:22,914 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:35:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:23,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:23,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568215183] [2024-11-23 22:35:23,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568215183] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:23,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:23,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-23 22:35:23,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160524747] [2024-11-23 22:35:23,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:23,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 22:35:23,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:23,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 22:35:23,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-23 22:35:23,655 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:23,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 42 transitions, 196 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:23,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:23,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:23,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:25,835 INFO L124 PetriNetUnfolderBase]: 6978/10217 cut-off events. [2024-11-23 22:35:25,835 INFO L125 PetriNetUnfolderBase]: For 11309/11309 co-relation queries the response was YES. [2024-11-23 22:35:25,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28381 conditions, 10217 events. 6978/10217 cut-off events. For 11309/11309 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 57405 event pairs, 2510 based on Foata normal form. 1/9636 useless extension candidates. Maximal degree in co-relation 28365. Up to 4351 conditions per place. [2024-11-23 22:35:25,924 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 128 selfloop transitions, 16 changer transitions 3/148 dead transitions. [2024-11-23 22:35:25,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 148 transitions, 1000 flow [2024-11-23 22:35:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:35:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:35:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-11-23 22:35:25,927 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-11-23 22:35:25,927 INFO L175 Difference]: Start difference. First operand has 53 places, 42 transitions, 196 flow. Second operand 7 states and 136 transitions. [2024-11-23 22:35:25,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 148 transitions, 1000 flow [2024-11-23 22:35:25,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 148 transitions, 968 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-23 22:35:25,940 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 372 flow [2024-11-23 22:35:25,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=372, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-11-23 22:35:25,941 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 26 predicate places. [2024-11-23 22:35:25,942 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 372 flow [2024-11-23 22:35:25,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:25,942 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:25,942 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:25,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 22:35:25,943 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:25,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:25,943 INFO L85 PathProgramCache]: Analyzing trace with hash 119286685, now seen corresponding path program 5 times [2024-11-23 22:35:25,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:25,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478103766] [2024-11-23 22:35:25,944 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 22:35:25,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:26,005 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-23 22:35:26,005 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:35:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 22:35:27,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:27,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478103766] [2024-11-23 22:35:27,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478103766] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:35:27,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573119630] [2024-11-23 22:35:27,384 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 22:35:27,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:35:27,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:35:27,390 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:35:27,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 22:35:27,531 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-23 22:35:27,531 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:35:27,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-23 22:35:27,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:35:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:28,052 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 22:35:28,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573119630] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:28,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 22:35:28,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2024-11-23 22:35:28,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037329832] [2024-11-23 22:35:28,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:28,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 22:35:28,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:28,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 22:35:28,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-11-23 22:35:28,054 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:28,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 372 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:28,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:28,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:28,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:30,290 INFO L124 PetriNetUnfolderBase]: 7030/10307 cut-off events. [2024-11-23 22:35:30,291 INFO L125 PetriNetUnfolderBase]: For 17785/17785 co-relation queries the response was YES. [2024-11-23 22:35:30,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32321 conditions, 10307 events. 7030/10307 cut-off events. For 17785/17785 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 56065 event pairs, 2691 based on Foata normal form. 1/10308 useless extension candidates. Maximal degree in co-relation 32301. Up to 4814 conditions per place. [2024-11-23 22:35:30,371 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 105 selfloop transitions, 27 changer transitions 4/137 dead transitions. [2024-11-23 22:35:30,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 137 transitions, 1023 flow [2024-11-23 22:35:30,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:35:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:35:30,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-11-23 22:35:30,372 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-11-23 22:35:30,373 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 372 flow. Second operand 7 states and 123 transitions. [2024-11-23 22:35:30,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 137 transitions, 1023 flow [2024-11-23 22:35:30,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 137 transitions, 1023 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 22:35:30,431 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 630 flow [2024-11-23 22:35:30,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=630, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-11-23 22:35:30,432 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 37 predicate places. [2024-11-23 22:35:30,432 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 630 flow [2024-11-23 22:35:30,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:30,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:30,432 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:30,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-23 22:35:30,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:35:30,637 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:30,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:30,637 INFO L85 PathProgramCache]: Analyzing trace with hash -2008221055, now seen corresponding path program 6 times [2024-11-23 22:35:30,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:30,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037165546] [2024-11-23 22:35:30,638 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 22:35:30,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:30,694 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-23 22:35:30,694 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:35:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:31,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:31,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037165546] [2024-11-23 22:35:31,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037165546] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:31,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:31,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 22:35:31,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102092839] [2024-11-23 22:35:31,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:31,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 22:35:31,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:31,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 22:35:31,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:35:31,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:31,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 630 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:31,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:31,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:31,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:32,933 INFO L124 PetriNetUnfolderBase]: 7030/10299 cut-off events. [2024-11-23 22:35:32,933 INFO L125 PetriNetUnfolderBase]: For 28534/28534 co-relation queries the response was YES. [2024-11-23 22:35:32,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35662 conditions, 10299 events. 7030/10299 cut-off events. For 28534/28534 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 57025 event pairs, 2635 based on Foata normal form. 4/10303 useless extension candidates. Maximal degree in co-relation 35636. Up to 4465 conditions per place. [2024-11-23 22:35:33,025 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 95 selfloop transitions, 31 changer transitions 15/142 dead transitions. [2024-11-23 22:35:33,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 142 transitions, 1255 flow [2024-11-23 22:35:33,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:35:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 22:35:33,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-11-23 22:35:33,026 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-11-23 22:35:33,026 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 630 flow. Second operand 6 states and 109 transitions. [2024-11-23 22:35:33,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 142 transitions, 1255 flow [2024-11-23 22:35:33,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 142 transitions, 1239 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-11-23 22:35:33,095 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 765 flow [2024-11-23 22:35:33,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=765, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-11-23 22:35:33,096 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 46 predicate places. [2024-11-23 22:35:33,096 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 765 flow [2024-11-23 22:35:33,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:33,096 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:33,096 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:33,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 22:35:33,096 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:33,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:33,097 INFO L85 PathProgramCache]: Analyzing trace with hash 981154935, now seen corresponding path program 7 times [2024-11-23 22:35:33,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:33,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919031998] [2024-11-23 22:35:33,097 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 22:35:33,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:35:33,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:33,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:33,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919031998] [2024-11-23 22:35:33,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919031998] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:33,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:33,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 22:35:33,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004623837] [2024-11-23 22:35:33,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:33,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 22:35:33,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:33,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 22:35:33,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:35:33,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:33,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 765 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:33,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:33,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:33,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:35,664 INFO L124 PetriNetUnfolderBase]: 6979/10193 cut-off events. [2024-11-23 22:35:35,664 INFO L125 PetriNetUnfolderBase]: For 39192/39192 co-relation queries the response was YES. [2024-11-23 22:35:35,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37809 conditions, 10193 events. 6979/10193 cut-off events. For 39192/39192 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 56062 event pairs, 2460 based on Foata normal form. 5/10198 useless extension candidates. Maximal degree in co-relation 37778. Up to 4572 conditions per place. [2024-11-23 22:35:35,765 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 89 selfloop transitions, 34 changer transitions 15/139 dead transitions. [2024-11-23 22:35:35,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 139 transitions, 1342 flow [2024-11-23 22:35:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:35:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 22:35:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-11-23 22:35:35,767 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-11-23 22:35:35,767 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 765 flow. Second operand 6 states and 110 transitions. [2024-11-23 22:35:35,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 139 transitions, 1342 flow [2024-11-23 22:35:35,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 139 transitions, 1304 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-23 22:35:35,890 INFO L231 Difference]: Finished difference. Result has 86 places, 79 transitions, 870 flow [2024-11-23 22:35:35,891 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=870, PETRI_PLACES=86, PETRI_TRANSITIONS=79} [2024-11-23 22:35:35,892 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 51 predicate places. [2024-11-23 22:35:35,893 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 79 transitions, 870 flow [2024-11-23 22:35:35,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:35,893 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:35,893 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:35,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 22:35:35,893 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:35,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:35,896 INFO L85 PathProgramCache]: Analyzing trace with hash 484330915, now seen corresponding path program 8 times [2024-11-23 22:35:35,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:35,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581552514] [2024-11-23 22:35:35,896 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:35:35,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:35,934 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 22:35:35,934 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:35:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:36,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:36,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581552514] [2024-11-23 22:35:36,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581552514] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:36,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:36,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 22:35:36,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715200654] [2024-11-23 22:35:36,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:36,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 22:35:36,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:36,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 22:35:36,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:35:36,371 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:36,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 79 transitions, 870 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:36,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:36,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:36,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:38,181 INFO L124 PetriNetUnfolderBase]: 6951/10176 cut-off events. [2024-11-23 22:35:38,181 INFO L125 PetriNetUnfolderBase]: For 45904/45904 co-relation queries the response was YES. [2024-11-23 22:35:38,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38524 conditions, 10176 events. 6951/10176 cut-off events. For 45904/45904 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 55254 event pairs, 2773 based on Foata normal form. 5/10181 useless extension candidates. Maximal degree in co-relation 38491. Up to 4814 conditions per place. [2024-11-23 22:35:38,369 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 102 selfloop transitions, 28 changer transitions 17/148 dead transitions. [2024-11-23 22:35:38,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 148 transitions, 1488 flow [2024-11-23 22:35:38,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:35:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 22:35:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-11-23 22:35:38,370 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5092592592592593 [2024-11-23 22:35:38,370 INFO L175 Difference]: Start difference. First operand has 86 places, 79 transitions, 870 flow. Second operand 6 states and 110 transitions. [2024-11-23 22:35:38,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 148 transitions, 1488 flow [2024-11-23 22:35:38,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 148 transitions, 1419 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-23 22:35:38,538 INFO L231 Difference]: Finished difference. Result has 90 places, 82 transitions, 925 flow [2024-11-23 22:35:38,539 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=925, PETRI_PLACES=90, PETRI_TRANSITIONS=82} [2024-11-23 22:35:38,539 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 55 predicate places. [2024-11-23 22:35:38,540 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 82 transitions, 925 flow [2024-11-23 22:35:38,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:38,541 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:38,541 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:38,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 22:35:38,541 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:38,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:38,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2037573931, now seen corresponding path program 9 times [2024-11-23 22:35:38,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:38,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234140207] [2024-11-23 22:35:38,542 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:35:38,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:38,579 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-23 22:35:38,579 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:35:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:39,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:39,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234140207] [2024-11-23 22:35:39,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234140207] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:39,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:39,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-23 22:35:39,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97833116] [2024-11-23 22:35:39,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:39,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 22:35:39,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:39,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 22:35:39,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-23 22:35:39,066 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:39,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 82 transitions, 925 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:39,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:39,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:39,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:40,793 INFO L124 PetriNetUnfolderBase]: 7260/10678 cut-off events. [2024-11-23 22:35:40,793 INFO L125 PetriNetUnfolderBase]: For 52297/52297 co-relation queries the response was YES. [2024-11-23 22:35:40,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40796 conditions, 10678 events. 7260/10678 cut-off events. For 52297/52297 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 61076 event pairs, 2661 based on Foata normal form. 1/10679 useless extension candidates. Maximal degree in co-relation 40761. Up to 4282 conditions per place. [2024-11-23 22:35:40,861 INFO L140 encePairwiseOnDemand]: 27/36 looper letters, 182 selfloop transitions, 25 changer transitions 4/212 dead transitions. [2024-11-23 22:35:40,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 212 transitions, 2678 flow [2024-11-23 22:35:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:35:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:35:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-11-23 22:35:40,862 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-11-23 22:35:40,862 INFO L175 Difference]: Start difference. First operand has 90 places, 82 transitions, 925 flow. Second operand 7 states and 128 transitions. [2024-11-23 22:35:40,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 212 transitions, 2678 flow [2024-11-23 22:35:40,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 212 transitions, 2551 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-11-23 22:35:40,960 INFO L231 Difference]: Finished difference. Result has 97 places, 98 transitions, 1245 flow [2024-11-23 22:35:40,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1245, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2024-11-23 22:35:40,961 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 62 predicate places. [2024-11-23 22:35:40,961 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 1245 flow [2024-11-23 22:35:40,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:40,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:40,961 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:40,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-23 22:35:40,961 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:40,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:40,962 INFO L85 PathProgramCache]: Analyzing trace with hash -793126587, now seen corresponding path program 10 times [2024-11-23 22:35:40,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:40,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183752455] [2024-11-23 22:35:40,962 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 22:35:40,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:40,988 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 22:35:40,988 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:35:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:41,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:41,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183752455] [2024-11-23 22:35:41,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183752455] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:41,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:41,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-23 22:35:41,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57039651] [2024-11-23 22:35:41,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:41,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 22:35:41,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:41,440 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 22:35:41,440 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-23 22:35:41,440 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:41,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 1245 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:41,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:41,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:41,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:43,538 INFO L124 PetriNetUnfolderBase]: 7260/10668 cut-off events. [2024-11-23 22:35:43,538 INFO L125 PetriNetUnfolderBase]: For 58211/58211 co-relation queries the response was YES. [2024-11-23 22:35:43,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42549 conditions, 10668 events. 7260/10668 cut-off events. For 58211/58211 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 59061 event pairs, 2821 based on Foata normal form. 5/10673 useless extension candidates. Maximal degree in co-relation 42510. Up to 4877 conditions per place. [2024-11-23 22:35:43,638 INFO L140 encePairwiseOnDemand]: 29/36 looper letters, 102 selfloop transitions, 42 changer transitions 18/163 dead transitions. [2024-11-23 22:35:43,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 163 transitions, 1942 flow [2024-11-23 22:35:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:35:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 22:35:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-11-23 22:35:43,640 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-23 22:35:43,640 INFO L175 Difference]: Start difference. First operand has 97 places, 98 transitions, 1245 flow. Second operand 6 states and 108 transitions. [2024-11-23 22:35:43,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 163 transitions, 1942 flow [2024-11-23 22:35:43,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 163 transitions, 1913 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-23 22:35:43,920 INFO L231 Difference]: Finished difference. Result has 103 places, 98 transitions, 1334 flow [2024-11-23 22:35:43,920 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1334, PETRI_PLACES=103, PETRI_TRANSITIONS=98} [2024-11-23 22:35:43,921 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 68 predicate places. [2024-11-23 22:35:43,921 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 98 transitions, 1334 flow [2024-11-23 22:35:43,921 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:43,921 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:43,921 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:43,921 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 22:35:43,921 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:43,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:43,922 INFO L85 PathProgramCache]: Analyzing trace with hash -947761570, now seen corresponding path program 1 times [2024-11-23 22:35:43,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:43,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676392197] [2024-11-23 22:35:43,922 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:35:43,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:35:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:44,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:44,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676392197] [2024-11-23 22:35:44,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676392197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:44,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:44,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-23 22:35:44,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137914880] [2024-11-23 22:35:44,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:44,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 22:35:44,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:44,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 22:35:44,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-23 22:35:44,342 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:44,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 98 transitions, 1334 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:44,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:44,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:44,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:46,622 INFO L124 PetriNetUnfolderBase]: 8495/12493 cut-off events. [2024-11-23 22:35:46,622 INFO L125 PetriNetUnfolderBase]: For 69432/69432 co-relation queries the response was YES. [2024-11-23 22:35:46,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49261 conditions, 12493 events. 8495/12493 cut-off events. For 69432/69432 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 72991 event pairs, 1129 based on Foata normal form. 13/12506 useless extension candidates. Maximal degree in co-relation 49220. Up to 7984 conditions per place. [2024-11-23 22:35:46,750 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 197 selfloop transitions, 24 changer transitions 1/223 dead transitions. [2024-11-23 22:35:46,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 223 transitions, 2970 flow [2024-11-23 22:35:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:35:46,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:35:46,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-11-23 22:35:46,753 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-11-23 22:35:46,753 INFO L175 Difference]: Start difference. First operand has 103 places, 98 transitions, 1334 flow. Second operand 7 states and 129 transitions. [2024-11-23 22:35:46,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 223 transitions, 2970 flow [2024-11-23 22:35:46,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 223 transitions, 2770 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-11-23 22:35:46,976 INFO L231 Difference]: Finished difference. Result has 107 places, 110 transitions, 1499 flow [2024-11-23 22:35:46,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1499, PETRI_PLACES=107, PETRI_TRANSITIONS=110} [2024-11-23 22:35:46,977 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 72 predicate places. [2024-11-23 22:35:46,977 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 110 transitions, 1499 flow [2024-11-23 22:35:46,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:46,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:46,977 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:46,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 22:35:46,977 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:46,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:46,978 INFO L85 PathProgramCache]: Analyzing trace with hash 514616054, now seen corresponding path program 2 times [2024-11-23 22:35:46,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:46,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844329271] [2024-11-23 22:35:46,978 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:35:46,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:47,026 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:35:47,026 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:35:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:47,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:47,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844329271] [2024-11-23 22:35:47,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844329271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:47,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:47,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-23 22:35:47,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91669243] [2024-11-23 22:35:47,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:47,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 22:35:47,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:47,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 22:35:47,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-23 22:35:47,517 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:47,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 110 transitions, 1499 flow. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:47,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:47,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:47,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:49,773 INFO L124 PetriNetUnfolderBase]: 8839/13062 cut-off events. [2024-11-23 22:35:49,773 INFO L125 PetriNetUnfolderBase]: For 78920/78920 co-relation queries the response was YES. [2024-11-23 22:35:49,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52624 conditions, 13062 events. 8839/13062 cut-off events. For 78920/78920 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 76866 event pairs, 2904 based on Foata normal form. 13/13075 useless extension candidates. Maximal degree in co-relation 52580. Up to 4328 conditions per place. [2024-11-23 22:35:49,964 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 209 selfloop transitions, 27 changer transitions 1/238 dead transitions. [2024-11-23 22:35:49,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 238 transitions, 3143 flow [2024-11-23 22:35:49,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:35:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:35:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-11-23 22:35:49,966 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-11-23 22:35:49,966 INFO L175 Difference]: Start difference. First operand has 107 places, 110 transitions, 1499 flow. Second operand 7 states and 137 transitions. [2024-11-23 22:35:49,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 238 transitions, 3143 flow [2024-11-23 22:35:50,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 238 transitions, 3112 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-23 22:35:50,336 INFO L231 Difference]: Finished difference. Result has 116 places, 121 transitions, 1787 flow [2024-11-23 22:35:50,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1787, PETRI_PLACES=116, PETRI_TRANSITIONS=121} [2024-11-23 22:35:50,337 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 81 predicate places. [2024-11-23 22:35:50,338 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 121 transitions, 1787 flow [2024-11-23 22:35:50,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:50,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:50,338 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:50,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-23 22:35:50,340 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:50,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:50,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2113500150, now seen corresponding path program 3 times [2024-11-23 22:35:50,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:50,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731509944] [2024-11-23 22:35:50,341 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:35:50,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:50,386 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 22:35:50,386 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:35:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:50,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:50,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731509944] [2024-11-23 22:35:50,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731509944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:50,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:50,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-23 22:35:50,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978645879] [2024-11-23 22:35:50,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:50,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 22:35:50,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:50,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 22:35:50,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-11-23 22:35:50,891 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:50,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 121 transitions, 1787 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:50,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:50,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:50,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:53,186 INFO L124 PetriNetUnfolderBase]: 9271/13700 cut-off events. [2024-11-23 22:35:53,186 INFO L125 PetriNetUnfolderBase]: For 92201/92201 co-relation queries the response was YES. [2024-11-23 22:35:53,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56609 conditions, 13700 events. 9271/13700 cut-off events. For 92201/92201 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 81491 event pairs, 2688 based on Foata normal form. 8/13708 useless extension candidates. Maximal degree in co-relation 56561. Up to 4360 conditions per place. [2024-11-23 22:35:53,319 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 197 selfloop transitions, 46 changer transitions 1/245 dead transitions. [2024-11-23 22:35:53,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 245 transitions, 3300 flow [2024-11-23 22:35:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:35:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:35:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-11-23 22:35:53,320 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-23 22:35:53,321 INFO L175 Difference]: Start difference. First operand has 116 places, 121 transitions, 1787 flow. Second operand 7 states and 147 transitions. [2024-11-23 22:35:53,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 245 transitions, 3300 flow [2024-11-23 22:35:53,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 245 transitions, 3264 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-23 22:35:53,624 INFO L231 Difference]: Finished difference. Result has 123 places, 129 transitions, 2004 flow [2024-11-23 22:35:53,624 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2004, PETRI_PLACES=123, PETRI_TRANSITIONS=129} [2024-11-23 22:35:53,625 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 88 predicate places. [2024-11-23 22:35:53,625 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 129 transitions, 2004 flow [2024-11-23 22:35:53,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:53,625 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:53,625 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:53,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-23 22:35:53,625 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:53,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:53,626 INFO L85 PathProgramCache]: Analyzing trace with hash -253691240, now seen corresponding path program 1 times [2024-11-23 22:35:53,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:53,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515413787] [2024-11-23 22:35:53,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:35:53,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:35:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:54,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:54,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515413787] [2024-11-23 22:35:54,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515413787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:54,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:54,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-23 22:35:54,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137454395] [2024-11-23 22:35:54,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:54,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 22:35:54,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:54,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 22:35:54,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-23 22:35:54,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:54,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 2004 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:54,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:54,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:54,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:35:57,376 INFO L124 PetriNetUnfolderBase]: 11027/16261 cut-off events. [2024-11-23 22:35:57,377 INFO L125 PetriNetUnfolderBase]: For 112061/112061 co-relation queries the response was YES. [2024-11-23 22:35:57,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67349 conditions, 16261 events. 11027/16261 cut-off events. For 112061/112061 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 96524 event pairs, 2145 based on Foata normal form. 8/16269 useless extension candidates. Maximal degree in co-relation 67298. Up to 7584 conditions per place. [2024-11-23 22:35:57,546 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 196 selfloop transitions, 42 changer transitions 1/240 dead transitions. [2024-11-23 22:35:57,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 240 transitions, 3399 flow [2024-11-23 22:35:57,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:35:57,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:35:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-11-23 22:35:57,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-11-23 22:35:57,547 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 2004 flow. Second operand 7 states and 133 transitions. [2024-11-23 22:35:57,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 240 transitions, 3399 flow [2024-11-23 22:35:57,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 240 transitions, 3239 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-11-23 22:35:58,000 INFO L231 Difference]: Finished difference. Result has 130 places, 143 transitions, 2251 flow [2024-11-23 22:35:58,000 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2251, PETRI_PLACES=130, PETRI_TRANSITIONS=143} [2024-11-23 22:35:58,001 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 95 predicate places. [2024-11-23 22:35:58,001 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 143 transitions, 2251 flow [2024-11-23 22:35:58,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:58,001 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:35:58,001 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:35:58,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-23 22:35:58,001 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:35:58,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:35:58,002 INFO L85 PathProgramCache]: Analyzing trace with hash -444695776, now seen corresponding path program 4 times [2024-11-23 22:35:58,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:35:58,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772917242] [2024-11-23 22:35:58,002 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 22:35:58,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:35:58,021 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 22:35:58,022 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:35:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:35:58,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:35:58,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772917242] [2024-11-23 22:35:58,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772917242] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:35:58,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:35:58,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-23 22:35:58,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082228687] [2024-11-23 22:35:58,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:35:58,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 22:35:58,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:35:58,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 22:35:58,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-23 22:35:58,281 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:35:58,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 143 transitions, 2251 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:35:58,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:35:58,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:35:58,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:36:00,690 INFO L124 PetriNetUnfolderBase]: 11371/16830 cut-off events. [2024-11-23 22:36:00,690 INFO L125 PetriNetUnfolderBase]: For 125134/125134 co-relation queries the response was YES. [2024-11-23 22:36:00,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70242 conditions, 16830 events. 11371/16830 cut-off events. For 125134/125134 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 103223 event pairs, 3120 based on Foata normal form. 13/16843 useless extension candidates. Maximal degree in co-relation 70187. Up to 5369 conditions per place. [2024-11-23 22:36:00,907 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 210 selfloop transitions, 54 changer transitions 1/266 dead transitions. [2024-11-23 22:36:00,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 266 transitions, 3873 flow [2024-11-23 22:36:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:36:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:36:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-11-23 22:36:00,912 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-11-23 22:36:00,912 INFO L175 Difference]: Start difference. First operand has 130 places, 143 transitions, 2251 flow. Second operand 7 states and 146 transitions. [2024-11-23 22:36:00,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 266 transitions, 3873 flow [2024-11-23 22:36:01,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 266 transitions, 3767 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-11-23 22:36:01,459 INFO L231 Difference]: Finished difference. Result has 137 places, 146 transitions, 2382 flow [2024-11-23 22:36:01,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2382, PETRI_PLACES=137, PETRI_TRANSITIONS=146} [2024-11-23 22:36:01,462 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 102 predicate places. [2024-11-23 22:36:01,462 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 146 transitions, 2382 flow [2024-11-23 22:36:01,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:01,462 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:36:01,463 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:01,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-23 22:36:01,463 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:36:01,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:01,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1827308240, now seen corresponding path program 2 times [2024-11-23 22:36:01,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:01,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255671238] [2024-11-23 22:36:01,464 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:36:01,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:01,516 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:36:01,516 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:02,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:02,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255671238] [2024-11-23 22:36:02,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255671238] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:36:02,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:36:02,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-23 22:36:02,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579335325] [2024-11-23 22:36:02,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:36:02,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 22:36:02,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:02,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 22:36:02,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-23 22:36:02,061 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:36:02,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 146 transitions, 2382 flow. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:02,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:36:02,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:36:02,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:36:07,228 INFO L124 PetriNetUnfolderBase]: 17827/26342 cut-off events. [2024-11-23 22:36:07,228 INFO L125 PetriNetUnfolderBase]: For 197059/197059 co-relation queries the response was YES. [2024-11-23 22:36:07,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110015 conditions, 26342 events. 17827/26342 cut-off events. For 197059/197059 co-relation queries the response was YES. Maximal size of possible extension queue 1051. Compared 169157 event pairs, 2702 based on Foata normal form. 8/26350 useless extension candidates. Maximal degree in co-relation 109957. Up to 12481 conditions per place. [2024-11-23 22:36:07,644 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 255 selfloop transitions, 61 changer transitions 1/318 dead transitions. [2024-11-23 22:36:07,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 318 transitions, 5216 flow [2024-11-23 22:36:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:36:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:36:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-11-23 22:36:07,645 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-11-23 22:36:07,646 INFO L175 Difference]: Start difference. First operand has 137 places, 146 transitions, 2382 flow. Second operand 7 states and 132 transitions. [2024-11-23 22:36:07,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 318 transitions, 5216 flow [2024-11-23 22:36:08,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 318 transitions, 5062 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-11-23 22:36:08,455 INFO L231 Difference]: Finished difference. Result has 146 places, 187 transitions, 3249 flow [2024-11-23 22:36:08,455 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3249, PETRI_PLACES=146, PETRI_TRANSITIONS=187} [2024-11-23 22:36:08,456 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 111 predicate places. [2024-11-23 22:36:08,456 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 187 transitions, 3249 flow [2024-11-23 22:36:08,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:08,457 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:36:08,457 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:08,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-23 22:36:08,457 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:36:08,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:08,457 INFO L85 PathProgramCache]: Analyzing trace with hash 648645782, now seen corresponding path program 5 times [2024-11-23 22:36:08,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:08,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358089665] [2024-11-23 22:36:08,458 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 22:36:08,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:08,505 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-23 22:36:08,505 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:09,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:09,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358089665] [2024-11-23 22:36:09,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358089665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:36:09,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738390058] [2024-11-23 22:36:09,015 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-23 22:36:09,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:09,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:36:09,019 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:36:09,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 22:36:09,179 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-23 22:36:09,180 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:09,182 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 22:36:09,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:36:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:09,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:36:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:09,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738390058] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 22:36:09,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 22:36:09,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 19 [2024-11-23 22:36:09,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118815547] [2024-11-23 22:36:09,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:36:09,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 22:36:09,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:09,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 22:36:09,997 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-23 22:36:09,997 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:36:09,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 187 transitions, 3249 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:09,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:36:09,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:36:09,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:36:15,098 INFO L124 PetriNetUnfolderBase]: 17806/26305 cut-off events. [2024-11-23 22:36:15,098 INFO L125 PetriNetUnfolderBase]: For 227638/227638 co-relation queries the response was YES. [2024-11-23 22:36:15,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114260 conditions, 26305 events. 17806/26305 cut-off events. For 227638/227638 co-relation queries the response was YES. Maximal size of possible extension queue 1071. Compared 170412 event pairs, 4698 based on Foata normal form. 13/26318 useless extension candidates. Maximal degree in co-relation 114197. Up to 8900 conditions per place. [2024-11-23 22:36:15,363 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 213 selfloop transitions, 91 changer transitions 1/306 dead transitions. [2024-11-23 22:36:15,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 306 transitions, 4922 flow [2024-11-23 22:36:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:36:15,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:36:15,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-11-23 22:36:15,365 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-23 22:36:15,365 INFO L175 Difference]: Start difference. First operand has 146 places, 187 transitions, 3249 flow. Second operand 7 states and 147 transitions. [2024-11-23 22:36:15,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 306 transitions, 4922 flow [2024-11-23 22:36:16,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 306 transitions, 4890 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-11-23 22:36:16,493 INFO L231 Difference]: Finished difference. Result has 154 places, 189 transitions, 3447 flow [2024-11-23 22:36:16,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=3217, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3447, PETRI_PLACES=154, PETRI_TRANSITIONS=189} [2024-11-23 22:36:16,493 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 119 predicate places. [2024-11-23 22:36:16,493 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 189 transitions, 3447 flow [2024-11-23 22:36:16,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:16,494 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:36:16,494 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:16,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 22:36:16,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ce4054e-7df6-433c-9d79-0edb20c49ba6/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:36:16,694 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:36:16,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:16,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2143864996, now seen corresponding path program 3 times [2024-11-23 22:36:16,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:16,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122066662] [2024-11-23 22:36:16,695 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:36:16,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:16,728 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 22:36:16,728 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:17,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:17,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122066662] [2024-11-23 22:36:17,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122066662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:36:17,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:36:17,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-23 22:36:17,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995997115] [2024-11-23 22:36:17,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:36:17,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 22:36:17,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:17,192 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 22:36:17,192 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-23 22:36:17,192 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:36:17,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 189 transitions, 3447 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:17,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:36:17,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:36:17,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:36:22,112 INFO L124 PetriNetUnfolderBase]: 18238/26943 cut-off events. [2024-11-23 22:36:22,113 INFO L125 PetriNetUnfolderBase]: For 254104/254104 co-relation queries the response was YES. [2024-11-23 22:36:22,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119363 conditions, 26943 events. 18238/26943 cut-off events. For 254104/254104 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 174542 event pairs, 6088 based on Foata normal form. 8/26951 useless extension candidates. Maximal degree in co-relation 119297. Up to 13230 conditions per place. [2024-11-23 22:36:22,401 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 249 selfloop transitions, 84 changer transitions 1/335 dead transitions. [2024-11-23 22:36:22,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 335 transitions, 5861 flow [2024-11-23 22:36:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:36:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:36:22,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-11-23 22:36:22,403 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-11-23 22:36:22,403 INFO L175 Difference]: Start difference. First operand has 154 places, 189 transitions, 3447 flow. Second operand 7 states and 142 transitions. [2024-11-23 22:36:22,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 335 transitions, 5861 flow [2024-11-23 22:36:23,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 335 transitions, 5624 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-23 22:36:23,297 INFO L231 Difference]: Finished difference. Result has 161 places, 214 transitions, 4073 flow [2024-11-23 22:36:23,297 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=3274, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4073, PETRI_PLACES=161, PETRI_TRANSITIONS=214} [2024-11-23 22:36:23,298 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 126 predicate places. [2024-11-23 22:36:23,298 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 214 transitions, 4073 flow [2024-11-23 22:36:23,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:23,298 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:36:23,298 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:23,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-23 22:36:23,298 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:36:23,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:23,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1202691838, now seen corresponding path program 6 times [2024-11-23 22:36:23,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:23,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302531815] [2024-11-23 22:36:23,299 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-23 22:36:23,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:23,331 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-23 22:36:23,331 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:23,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:23,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302531815] [2024-11-23 22:36:23,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302531815] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:36:23,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:36:23,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-23 22:36:23,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779316855] [2024-11-23 22:36:23,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:36:23,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 22:36:23,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:23,788 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 22:36:23,788 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-23 22:36:23,788 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:36:23,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 214 transitions, 4073 flow. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:23,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:36:23,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:36:23,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:36:29,958 INFO L124 PetriNetUnfolderBase]: 18939/28096 cut-off events. [2024-11-23 22:36:29,958 INFO L125 PetriNetUnfolderBase]: For 277239/277239 co-relation queries the response was YES. [2024-11-23 22:36:30,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126134 conditions, 28096 events. 18939/28096 cut-off events. For 277239/277239 co-relation queries the response was YES. Maximal size of possible extension queue 1120. Compared 184580 event pairs, 4473 based on Foata normal form. 13/28109 useless extension candidates. Maximal degree in co-relation 126063. Up to 8900 conditions per place. [2024-11-23 22:36:30,261 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 268 selfloop transitions, 80 changer transitions 1/350 dead transitions. [2024-11-23 22:36:30,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 350 transitions, 6277 flow [2024-11-23 22:36:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:36:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:36:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-11-23 22:36:30,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-11-23 22:36:30,262 INFO L175 Difference]: Start difference. First operand has 161 places, 214 transitions, 4073 flow. Second operand 7 states and 142 transitions. [2024-11-23 22:36:30,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 350 transitions, 6277 flow [2024-11-23 22:36:31,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 350 transitions, 6095 flow, removed 68 selfloop flow, removed 1 redundant places. [2024-11-23 22:36:31,791 INFO L231 Difference]: Finished difference. Result has 169 places, 217 transitions, 4177 flow [2024-11-23 22:36:31,792 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4177, PETRI_PLACES=169, PETRI_TRANSITIONS=217} [2024-11-23 22:36:31,792 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 134 predicate places. [2024-11-23 22:36:31,793 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 217 transitions, 4177 flow [2024-11-23 22:36:31,793 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:31,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:36:31,793 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:31,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-23 22:36:31,793 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:36:31,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:31,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1033442422, now seen corresponding path program 7 times [2024-11-23 22:36:31,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:31,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802522346] [2024-11-23 22:36:31,794 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-23 22:36:31,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:36:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:32,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:32,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802522346] [2024-11-23 22:36:32,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802522346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:36:32,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:36:32,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-23 22:36:32,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644732325] [2024-11-23 22:36:32,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:36:32,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 22:36:32,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:32,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 22:36:32,217 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-23 22:36:32,217 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:36:32,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 217 transitions, 4177 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:32,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:36:32,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:36:32,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 22:36:38,695 INFO L124 PetriNetUnfolderBase]: 20175/30028 cut-off events. [2024-11-23 22:36:38,696 INFO L125 PetriNetUnfolderBase]: For 309012/309012 co-relation queries the response was YES. [2024-11-23 22:36:38,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135410 conditions, 30028 events. 20175/30028 cut-off events. For 309012/309012 co-relation queries the response was YES. Maximal size of possible extension queue 1215. Compared 200676 event pairs, 5462 based on Foata normal form. 8/30036 useless extension candidates. Maximal degree in co-relation 135336. Up to 12342 conditions per place. [2024-11-23 22:36:39,032 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 233 selfloop transitions, 109 changer transitions 1/344 dead transitions. [2024-11-23 22:36:39,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 344 transitions, 6192 flow [2024-11-23 22:36:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 22:36:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 22:36:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-11-23 22:36:39,034 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-23 22:36:39,034 INFO L175 Difference]: Start difference. First operand has 169 places, 217 transitions, 4177 flow. Second operand 7 states and 144 transitions. [2024-11-23 22:36:39,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 344 transitions, 6192 flow [2024-11-23 22:36:40,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 344 transitions, 6072 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-23 22:36:40,462 INFO L231 Difference]: Finished difference. Result has 176 places, 245 transitions, 5052 flow [2024-11-23 22:36:40,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=4072, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5052, PETRI_PLACES=176, PETRI_TRANSITIONS=245} [2024-11-23 22:36:40,463 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 141 predicate places. [2024-11-23 22:36:40,463 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 245 transitions, 5052 flow [2024-11-23 22:36:40,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:40,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 22:36:40,463 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:36:40,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-23 22:36:40,464 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-23 22:36:40,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:36:40,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1487174946, now seen corresponding path program 4 times [2024-11-23 22:36:40,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:36:40,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758807936] [2024-11-23 22:36:40,464 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-23 22:36:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:36:40,608 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-23 22:36:40,608 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:36:40,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 22:36:40,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:36:40,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758807936] [2024-11-23 22:36:40,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758807936] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:36:40,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:36:40,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-23 22:36:40,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526244551] [2024-11-23 22:36:40,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:36:40,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 22:36:40,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:36:40,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 22:36:40,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-23 22:36:40,963 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 36 [2024-11-23 22:36:40,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 245 transitions, 5052 flow. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:36:40,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 22:36:40,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 36 [2024-11-23 22:36:40,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand