./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd --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 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 12:55:40,668 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 12:55:40,740 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 12:55:40,746 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 12:55:40,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 12:55:40,773 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 12:55:40,773 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 12:55:40,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 12:55:40,774 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 12:55:40,774 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 12:55:40,775 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 12:55:40,775 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 12:55:40,775 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 12:55:40,775 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 12:55:40,776 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 12:55:40,776 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 12:55:40,776 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 12:55:40,776 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 12:55:40,777 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 12:55:40,777 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 12:55:40,777 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 12:55:40,777 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 12:55:40,777 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 12:55:40,777 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 12:55:40,778 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 12:55:40,778 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 12:55:40,778 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 12:55:40,778 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 12:55:40,778 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 12:55:40,778 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 12:55:40,779 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 12:55:40,779 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 12:55:40,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:55:40,779 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 12:55:40,779 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 12:55:40,779 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 12:55:40,779 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 12:55:40,779 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 12:55:40,780 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 12:55:40,780 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 12:55:40,780 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 12:55:40,780 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 12:55:40,780 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_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd 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 -> 48ddce9ee02b3ea4431cf137593b71facb450c3e223dbff4f116c3c0ac1377b5 [2024-11-13 12:55:41,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 12:55:41,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 12:55:41,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 12:55:41,173 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 12:55:41,174 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 12:55:41,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c Unable to find full path for "g++" [2024-11-13 12:55:43,509 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 12:55:43,901 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 12:55:43,902 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c [2024-11-13 12:55:43,914 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/data/343f40bdb/7a63d3096ea34f5bbbdd064a896dd461/FLAG9c4232abd [2024-11-13 12:55:44,135 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/data/343f40bdb/7a63d3096ea34f5bbbdd064a896dd461 [2024-11-13 12:55:44,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 12:55:44,141 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 12:55:44,143 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 12:55:44,143 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 12:55:44,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 12:55:44,151 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:44,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fa49c01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44, skipping insertion in model container [2024-11-13 12:55:44,153 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:44,182 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 12:55:44,558 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_e0d417ad-674c-4984-b3be-02c5365c4e78/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2024-11-13 12:55:44,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:55:44,608 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 12:55:44,698 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_e0d417ad-674c-4984-b3be-02c5365c4e78/sv-benchmarks/c/weaver/chl-nzb-file-symm.wvr.c[4955,4968] [2024-11-13 12:55:44,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 12:55:44,734 INFO L204 MainTranslator]: Completed translation [2024-11-13 12:55:44,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44 WrapperNode [2024-11-13 12:55:44,735 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 12:55:44,737 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 12:55:44,737 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 12:55:44,737 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 12:55:44,747 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:44,764 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:44,843 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 21, calls inlined = 29, statements flattened = 403 [2024-11-13 12:55:44,843 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 12:55:44,844 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 12:55:44,844 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 12:55:44,844 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 12:55:44,866 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:44,866 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:44,878 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:44,933 INFO L175 MemorySlicer]: Split 20 memory accesses to 2 slices as follows [2, 18]. 90 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-13 12:55:44,938 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:44,939 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:44,969 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:44,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:44,996 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:45,002 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:45,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 12:55:45,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 12:55:45,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 12:55:45,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 12:55:45,018 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (1/1) ... [2024-11-13 12:55:45,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 12:55:45,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:55:45,076 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 12:55:45,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 12:55:45,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 12:55:45,130 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 12:55:45,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 12:55:45,132 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 12:55:45,132 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 12:55:45,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 12:55:45,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 12:55:45,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 12:55:45,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 12:55:45,132 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 12:55:45,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 12:55:45,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 12:55:45,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 12:55:45,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 12:55:45,135 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 12:55:45,344 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 12:55:45,348 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 12:55:46,581 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 12:55:46,581 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 12:55:47,666 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 12:55:47,666 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-13 12:55:47,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:55:47 BoogieIcfgContainer [2024-11-13 12:55:47,667 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 12:55:47,669 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 12:55:47,669 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 12:55:47,678 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 12:55:47,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 12:55:44" (1/3) ... [2024-11-13 12:55:47,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae35062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:55:47, skipping insertion in model container [2024-11-13 12:55:47,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 12:55:44" (2/3) ... [2024-11-13 12:55:47,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae35062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 12:55:47, skipping insertion in model container [2024-11-13 12:55:47,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 12:55:47" (3/3) ... [2024-11-13 12:55:47,684 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-symm.wvr.c [2024-11-13 12:55:47,704 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 12:55:47,706 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-nzb-file-symm.wvr.c that has 3 procedures, 27 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-13 12:55:47,707 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 12:55:47,851 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-13 12:55:47,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 34 transitions, 82 flow [2024-11-13 12:55:47,968 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2024-11-13 12:55:47,972 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 12:55:47,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 8/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 42 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-13 12:55:47,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 34 transitions, 82 flow [2024-11-13 12:55:47,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 31 transitions, 74 flow [2024-11-13 12:55:47,998 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 12:55:48,021 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;@77438007, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 12:55:48,022 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-13 12:55:48,050 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 12:55:48,050 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2024-11-13 12:55:48,050 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-13 12:55:48,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:48,052 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:48,052 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:48,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:48,059 INFO L85 PathProgramCache]: Analyzing trace with hash 543415604, now seen corresponding path program 1 times [2024-11-13 12:55:48,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:48,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531652147] [2024-11-13 12:55:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:48,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:55:48,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:48,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531652147] [2024-11-13 12:55:48,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531652147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:55:48,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:55:48,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 12:55:48,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044694204] [2024-11-13 12:55:48,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:55:48,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:55:48,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:48,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:55:48,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:55:48,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:55:48,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:48,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:48,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:55:48,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:49,198 INFO L124 PetriNetUnfolderBase]: 202/329 cut-off events. [2024-11-13 12:55:49,198 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-13 12:55:49,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 329 events. 202/329 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 999 event pairs, 138 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 620. Up to 327 conditions per place. [2024-11-13 12:55:49,204 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 26 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2024-11-13 12:55:49,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 134 flow [2024-11-13 12:55:49,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:55:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 12:55:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 43 transitions. [2024-11-13 12:55:49,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2024-11-13 12:55:49,224 INFO L175 Difference]: Start difference. First operand has 30 places, 31 transitions, 74 flow. Second operand 3 states and 43 transitions. [2024-11-13 12:55:49,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 134 flow [2024-11-13 12:55:49,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 126 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 12:55:49,254 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 84 flow [2024-11-13 12:55:49,257 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2024-11-13 12:55:49,266 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2024-11-13 12:55:49,266 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 84 flow [2024-11-13 12:55:49,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:49,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:49,266 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:49,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 12:55:49,267 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:49,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:49,269 INFO L85 PathProgramCache]: Analyzing trace with hash -206825952, now seen corresponding path program 1 times [2024-11-13 12:55:49,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:49,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616487594] [2024-11-13 12:55:49,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:49,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:55:49,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:49,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616487594] [2024-11-13 12:55:49,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616487594] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:55:49,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136509408] [2024-11-13 12:55:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:49,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:49,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:55:49,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:55:49,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 12:55:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:50,001 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-13 12:55:50,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:55:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:55:50,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:55:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 12:55:50,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136509408] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:55:50,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:55:50,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-13 12:55:50,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646632459] [2024-11-13 12:55:50,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:55:50,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 12:55:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 12:55:50,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2024-11-13 12:55:50,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:55:50,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:50,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:50,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:55:50,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:50,525 INFO L124 PetriNetUnfolderBase]: 202/335 cut-off events. [2024-11-13 12:55:50,525 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-13 12:55:50,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696 conditions, 335 events. 202/335 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 999 event pairs, 138 based on Foata normal form. 3/275 useless extension candidates. Maximal degree in co-relation 666. Up to 327 conditions per place. [2024-11-13 12:55:50,528 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 10 changer transitions 0/37 dead transitions. [2024-11-13 12:55:50,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 37 transitions, 180 flow [2024-11-13 12:55:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 12:55:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 12:55:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-11-13 12:55:50,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.29411764705882354 [2024-11-13 12:55:50,531 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 84 flow. Second operand 6 states and 60 transitions. [2024-11-13 12:55:50,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 37 transitions, 180 flow [2024-11-13 12:55:50,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 12:55:50,534 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 146 flow [2024-11-13 12:55:50,534 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2024-11-13 12:55:50,535 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2024-11-13 12:55:50,535 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 146 flow [2024-11-13 12:55:50,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:50,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:50,536 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:50,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 12:55:50,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:50,741 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:50,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:50,742 INFO L85 PathProgramCache]: Analyzing trace with hash -842880938, now seen corresponding path program 2 times [2024-11-13 12:55:50,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:50,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526833277] [2024-11-13 12:55:50,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:50,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 12:55:51,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:51,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526833277] [2024-11-13 12:55:51,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526833277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:55:51,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381972081] [2024-11-13 12:55:51,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:55:51,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:51,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:55:51,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:55:51,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 12:55:51,479 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-13 12:55:51,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:55:51,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 12:55:51,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:55:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 12:55:52,864 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:55:52,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381972081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:55:52,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:55:52,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-11-13 12:55:52,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580046164] [2024-11-13 12:55:52,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:55:52,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:55:52,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:52,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:55:52,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-13 12:55:52,868 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:55:52,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:52,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:52,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:55:52,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:53,345 INFO L124 PetriNetUnfolderBase]: 244/430 cut-off events. [2024-11-13 12:55:53,345 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-13 12:55:53,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 909 conditions, 430 events. 244/430 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1540 event pairs, 138 based on Foata normal form. 1/363 useless extension candidates. Maximal degree in co-relation 848. Up to 319 conditions per place. [2024-11-13 12:55:53,350 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 45 selfloop transitions, 1 changer transitions 9/56 dead transitions. [2024-11-13 12:55:53,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 56 transitions, 299 flow [2024-11-13 12:55:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:55:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 12:55:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-11-13 12:55:53,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2024-11-13 12:55:53,353 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 146 flow. Second operand 4 states and 61 transitions. [2024-11-13 12:55:53,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 56 transitions, 299 flow [2024-11-13 12:55:53,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 283 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-13 12:55:53,357 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 139 flow [2024-11-13 12:55:53,357 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-11-13 12:55:53,358 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-11-13 12:55:53,358 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 139 flow [2024-11-13 12:55:53,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:53,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:53,359 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:53,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 12:55:53,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:53,560 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:53,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:53,561 INFO L85 PathProgramCache]: Analyzing trace with hash -987735972, now seen corresponding path program 3 times [2024-11-13 12:55:53,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:53,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538578836] [2024-11-13 12:55:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:53,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 12:55:54,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:54,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538578836] [2024-11-13 12:55:54,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538578836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:55:54,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158813623] [2024-11-13 12:55:54,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:55:54,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:54,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:55:54,005 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:55:54,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 12:55:54,235 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-13 12:55:54,235 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:55:54,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 12:55:54,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:55:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 12:55:55,084 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 12:55:55,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158813623] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:55:55,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 12:55:55,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-11-13 12:55:55,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013229319] [2024-11-13 12:55:55,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:55:55,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 12:55:55,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:55,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 12:55:55,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-13 12:55:55,087 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:55:55,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 139 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:55,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:55,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:55:55,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:55,559 INFO L124 PetriNetUnfolderBase]: 268/487 cut-off events. [2024-11-13 12:55:55,559 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-13 12:55:55,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 487 events. 268/487 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1774 event pairs, 181 based on Foata normal form. 5/436 useless extension candidates. Maximal degree in co-relation 1048. Up to 393 conditions per place. [2024-11-13 12:55:55,564 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 45 selfloop transitions, 1 changer transitions 7/54 dead transitions. [2024-11-13 12:55:55,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 288 flow [2024-11-13 12:55:55,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 12:55:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 12:55:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2024-11-13 12:55:55,570 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4338235294117647 [2024-11-13 12:55:55,570 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 139 flow. Second operand 4 states and 59 transitions. [2024-11-13 12:55:55,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 288 flow [2024-11-13 12:55:55,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 282 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-13 12:55:55,578 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 145 flow [2024-11-13 12:55:55,578 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-13 12:55:55,598 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-11-13 12:55:55,599 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 145 flow [2024-11-13 12:55:55,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:55,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:55,600 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:55,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 12:55:55,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:55,801 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:55,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:55,802 INFO L85 PathProgramCache]: Analyzing trace with hash -163348754, now seen corresponding path program 1 times [2024-11-13 12:55:55,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:55,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882684173] [2024-11-13 12:55:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:55,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-13 12:55:56,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:56,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882684173] [2024-11-13 12:55:56,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882684173] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:55:56,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:55:56,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:55:56,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104632993] [2024-11-13 12:55:56,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:55:56,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:55:56,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:56,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:55:56,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:55:56,008 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:55:56,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:56,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:56,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:55:56,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:56,209 INFO L124 PetriNetUnfolderBase]: 192/347 cut-off events. [2024-11-13 12:55:56,210 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2024-11-13 12:55:56,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 347 events. 192/347 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1052 event pairs, 73 based on Foata normal form. 21/336 useless extension candidates. Maximal degree in co-relation 777. Up to 271 conditions per place. [2024-11-13 12:55:56,213 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 39 selfloop transitions, 2 changer transitions 5/47 dead transitions. [2024-11-13 12:55:56,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 263 flow [2024-11-13 12:55:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:55:56,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 12:55:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-11-13 12:55:56,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-11-13 12:55:56,215 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 145 flow. Second operand 3 states and 49 transitions. [2024-11-13 12:55:56,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 263 flow [2024-11-13 12:55:56,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 47 transitions, 260 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-13 12:55:56,218 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 148 flow [2024-11-13 12:55:56,218 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-13 12:55:56,219 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 12 predicate places. [2024-11-13 12:55:56,220 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 148 flow [2024-11-13 12:55:56,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:56,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:56,220 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:56,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 12:55:56,221 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:56,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:56,221 INFO L85 PathProgramCache]: Analyzing trace with hash 694346500, now seen corresponding path program 1 times [2024-11-13 12:55:56,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:56,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515824249] [2024-11-13 12:55:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:56,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:56,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 12:55:56,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515824249] [2024-11-13 12:55:56,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515824249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:55:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865419545] [2024-11-13 12:55:56,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:56,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:55:56,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:55:56,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:55:56,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 12:55:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:56,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-13 12:55:56,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:55:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 12:55:56,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:55:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 12:55:56,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865419545] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:55:56,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:55:56,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-13 12:55:56,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346195993] [2024-11-13 12:55:56,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:55:56,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-13 12:55:56,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:56,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-13 12:55:56,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2024-11-13 12:55:56,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:55:56,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 148 flow. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:56,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:56,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:55:56,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:57,287 INFO L124 PetriNetUnfolderBase]: 171/306 cut-off events. [2024-11-13 12:55:57,287 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-11-13 12:55:57,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 306 events. 171/306 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 834 event pairs, 128 based on Foata normal form. 1/275 useless extension candidates. Maximal degree in co-relation 667. Up to 296 conditions per place. [2024-11-13 12:55:57,290 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 12 changer transitions 0/39 dead transitions. [2024-11-13 12:55:57,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 236 flow [2024-11-13 12:55:57,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 12:55:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 12:55:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 59 transitions. [2024-11-13 12:55:57,292 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24789915966386555 [2024-11-13 12:55:57,292 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 148 flow. Second operand 7 states and 59 transitions. [2024-11-13 12:55:57,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 236 flow [2024-11-13 12:55:57,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 228 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-13 12:55:57,295 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 186 flow [2024-11-13 12:55:57,295 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-13 12:55:57,296 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2024-11-13 12:55:57,296 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 186 flow [2024-11-13 12:55:57,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:57,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:57,297 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:57,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 12:55:57,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 12:55:57,498 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:57,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:57,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1442714138, now seen corresponding path program 2 times [2024-11-13 12:55:57,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:57,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280958800] [2024-11-13 12:55:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:57,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:57,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:55:57,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:57,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280958800] [2024-11-13 12:55:57,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280958800] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:55:57,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:55:57,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:55:57,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120911723] [2024-11-13 12:55:57,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:55:57,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:55:57,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:57,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:55:57,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:55:57,789 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:55:57,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:57,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:57,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:55:57,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:58,014 INFO L124 PetriNetUnfolderBase]: 240/423 cut-off events. [2024-11-13 12:55:58,014 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-13 12:55:58,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 423 events. 240/423 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1309 event pairs, 139 based on Foata normal form. 16/386 useless extension candidates. Maximal degree in co-relation 885. Up to 306 conditions per place. [2024-11-13 12:55:58,017 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 47 selfloop transitions, 3 changer transitions 1/52 dead transitions. [2024-11-13 12:55:58,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 52 transitions, 317 flow [2024-11-13 12:55:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:55:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 12:55:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-11-13 12:55:58,019 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2024-11-13 12:55:58,019 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 186 flow. Second operand 3 states and 49 transitions. [2024-11-13 12:55:58,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 52 transitions, 317 flow [2024-11-13 12:55:58,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 293 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-13 12:55:58,021 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 177 flow [2024-11-13 12:55:58,021 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2024-11-13 12:55:58,026 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2024-11-13 12:55:58,026 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 177 flow [2024-11-13 12:55:58,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:58,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:58,026 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:58,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 12:55:58,027 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:58,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:58,027 INFO L85 PathProgramCache]: Analyzing trace with hash 184381316, now seen corresponding path program 1 times [2024-11-13 12:55:58,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:58,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382820150] [2024-11-13 12:55:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:58,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:55:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-13 12:55:58,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:55:58,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382820150] [2024-11-13 12:55:58,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382820150] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 12:55:58,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 12:55:58,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 12:55:58,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943217705] [2024-11-13 12:55:58,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 12:55:58,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 12:55:58,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:55:58,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 12:55:58,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 12:55:58,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:55:58,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:58,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:55:58,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:55:58,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:55:58,703 INFO L124 PetriNetUnfolderBase]: 333/579 cut-off events. [2024-11-13 12:55:58,704 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-11-13 12:55:58,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1378 conditions, 579 events. 333/579 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1979 event pairs, 191 based on Foata normal form. 21/558 useless extension candidates. Maximal degree in co-relation 1313. Up to 423 conditions per place. [2024-11-13 12:55:58,708 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 48 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2024-11-13 12:55:58,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 320 flow [2024-11-13 12:55:58,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 12:55:58,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 12:55:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2024-11-13 12:55:58,710 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-11-13 12:55:58,712 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 177 flow. Second operand 3 states and 48 transitions. [2024-11-13 12:55:58,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 320 flow [2024-11-13 12:55:58,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 12:55:58,714 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 189 flow [2024-11-13 12:55:58,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-11-13 12:55:58,717 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2024-11-13 12:55:58,717 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 189 flow [2024-11-13 12:55:58,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:55:58,717 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:55:58,717 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:55:58,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-13 12:55:58,718 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:55:58,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:55:58,718 INFO L85 PathProgramCache]: Analyzing trace with hash -65478641, now seen corresponding path program 1 times [2024-11-13 12:55:58,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:55:58,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750059660] [2024-11-13 12:55:58,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:55:58,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:55:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:56:13,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:13,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750059660] [2024-11-13 12:56:13,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750059660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:13,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514688321] [2024-11-13 12:56:13,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:13,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:13,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:13,721 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:13,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 12:56:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:14,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-13 12:56:14,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:16,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:56:16,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 276 [2024-11-13 12:56:19,119 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:56:19,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:56:24,075 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 12:56:24,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 393 treesize of output 356 [2024-11-13 12:56:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:56:26,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514688321] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:56:26,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:56:26,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 8, 8] total 34 [2024-11-13 12:56:26,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915882289] [2024-11-13 12:56:26,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:56:26,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 12:56:26,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:56:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 12:56:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 12:56:26,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:56:26,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 189 flow. Second operand has 34 states, 34 states have (on average 5.470588235294118) internal successors, (186), 34 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:26,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:56:26,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:56:26,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:56:35,500 INFO L124 PetriNetUnfolderBase]: 839/1452 cut-off events. [2024-11-13 12:56:35,500 INFO L125 PetriNetUnfolderBase]: For 435/435 co-relation queries the response was YES. [2024-11-13 12:56:35,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3526 conditions, 1452 events. 839/1452 cut-off events. For 435/435 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6758 event pairs, 119 based on Foata normal form. 2/1454 useless extension candidates. Maximal degree in co-relation 3460. Up to 276 conditions per place. [2024-11-13 12:56:35,509 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 128 selfloop transitions, 48 changer transitions 26/203 dead transitions. [2024-11-13 12:56:35,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 203 transitions, 1054 flow [2024-11-13 12:56:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-13 12:56:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-13 12:56:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 284 transitions. [2024-11-13 12:56:35,513 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2784313725490196 [2024-11-13 12:56:35,513 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 189 flow. Second operand 30 states and 284 transitions. [2024-11-13 12:56:35,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 203 transitions, 1054 flow [2024-11-13 12:56:35,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 203 transitions, 1035 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 12:56:35,519 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 476 flow [2024-11-13 12:56:35,520 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=476, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2024-11-13 12:56:35,523 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 49 predicate places. [2024-11-13 12:56:35,523 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 476 flow [2024-11-13 12:56:35,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.470588235294118) internal successors, (186), 34 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:35,523 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:56:35,523 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:56:35,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 12:56:35,724 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:35,724 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:56:35,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:56:35,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1616129281, now seen corresponding path program 2 times [2024-11-13 12:56:35,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:56:35,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092860900] [2024-11-13 12:56:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:56:35,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:56:36,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:56:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:56:47,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:56:47,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092860900] [2024-11-13 12:56:47,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092860900] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:56:47,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219766424] [2024-11-13 12:56:47,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:56:47,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:56:47,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:56:47,860 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:56:47,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 12:56:48,159 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:56:48,159 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:56:48,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-13 12:56:48,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:56:50,145 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:56:50,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 274 [2024-11-13 12:56:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:56:51,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:56:57,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:56:57,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 416 treesize of output 370 [2024-11-13 12:56:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:56:58,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219766424] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:56:58,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:56:58,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 8] total 37 [2024-11-13 12:56:58,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420184102] [2024-11-13 12:56:58,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:56:58,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 12:56:58,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:56:58,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 12:56:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 12:56:58,992 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:56:58,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 476 flow. Second operand has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:56:58,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:56:58,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:56:58,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:57:03,129 INFO L124 PetriNetUnfolderBase]: 1026/1819 cut-off events. [2024-11-13 12:57:03,129 INFO L125 PetriNetUnfolderBase]: For 1999/1999 co-relation queries the response was YES. [2024-11-13 12:57:03,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5101 conditions, 1819 events. 1026/1819 cut-off events. For 1999/1999 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 9006 event pairs, 295 based on Foata normal form. 2/1821 useless extension candidates. Maximal degree in co-relation 5053. Up to 672 conditions per place. [2024-11-13 12:57:03,143 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 102 selfloop transitions, 48 changer transitions 10/161 dead transitions. [2024-11-13 12:57:03,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 161 transitions, 1111 flow [2024-11-13 12:57:03,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 12:57:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-13 12:57:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 199 transitions. [2024-11-13 12:57:03,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24387254901960784 [2024-11-13 12:57:03,147 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 476 flow. Second operand 24 states and 199 transitions. [2024-11-13 12:57:03,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 161 transitions, 1111 flow [2024-11-13 12:57:03,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 161 transitions, 998 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-11-13 12:57:03,181 INFO L231 Difference]: Finished difference. Result has 96 places, 91 transitions, 628 flow [2024-11-13 12:57:03,184 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=628, PETRI_PLACES=96, PETRI_TRANSITIONS=91} [2024-11-13 12:57:03,185 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2024-11-13 12:57:03,186 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 91 transitions, 628 flow [2024-11-13 12:57:03,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:03,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:57:03,187 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:03,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 12:57:03,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-13 12:57:03,392 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:57:03,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:03,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1607854251, now seen corresponding path program 3 times [2024-11-13 12:57:03,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:03,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362992683] [2024-11-13 12:57:03,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:03,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:12,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:12,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362992683] [2024-11-13 12:57:12,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362992683] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:12,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368989783] [2024-11-13 12:57:12,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:57:12,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:12,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:12,190 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:12,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 12:57:12,445 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 12:57:12,445 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:12,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-13 12:57:12,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:14,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:57:14,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 274 [2024-11-13 12:57:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:57:15,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:19,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:57:19,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 378 treesize of output 356 [2024-11-13 12:57:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:57:21,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368989783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:21,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:21,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 8] total 38 [2024-11-13 12:57:21,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846709315] [2024-11-13 12:57:21,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:21,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-13 12:57:21,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:21,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-13 12:57:21,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 12:57:21,543 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:57:21,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 91 transitions, 628 flow. Second operand has 38 states, 38 states have (on average 5.421052631578948) internal successors, (206), 38 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:21,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:57:21,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:57:21,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:57:28,859 INFO L124 PetriNetUnfolderBase]: 1392/2500 cut-off events. [2024-11-13 12:57:28,859 INFO L125 PetriNetUnfolderBase]: For 4449/4449 co-relation queries the response was YES. [2024-11-13 12:57:28,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7438 conditions, 2500 events. 1392/2500 cut-off events. For 4449/4449 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 13804 event pairs, 337 based on Foata normal form. 2/2502 useless extension candidates. Maximal degree in co-relation 7364. Up to 886 conditions per place. [2024-11-13 12:57:28,880 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 150 selfloop transitions, 81 changer transitions 19/251 dead transitions. [2024-11-13 12:57:28,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 251 transitions, 1764 flow [2024-11-13 12:57:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-13 12:57:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-13 12:57:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 311 transitions. [2024-11-13 12:57:28,884 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2540849673202614 [2024-11-13 12:57:28,884 INFO L175 Difference]: Start difference. First operand has 96 places, 91 transitions, 628 flow. Second operand 36 states and 311 transitions. [2024-11-13 12:57:28,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 251 transitions, 1764 flow [2024-11-13 12:57:28,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 251 transitions, 1591 flow, removed 61 selfloop flow, removed 15 redundant places. [2024-11-13 12:57:28,922 INFO L231 Difference]: Finished difference. Result has 123 places, 121 transitions, 947 flow [2024-11-13 12:57:28,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=947, PETRI_PLACES=123, PETRI_TRANSITIONS=121} [2024-11-13 12:57:28,924 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2024-11-13 12:57:28,924 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 121 transitions, 947 flow [2024-11-13 12:57:28,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.421052631578948) internal successors, (206), 38 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:28,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:57:28,927 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:28,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 12:57:29,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-13 12:57:29,128 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:57:29,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:29,128 INFO L85 PathProgramCache]: Analyzing trace with hash -837519141, now seen corresponding path program 4 times [2024-11-13 12:57:29,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:29,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972648669] [2024-11-13 12:57:29,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:29,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:38,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:38,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972648669] [2024-11-13 12:57:38,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972648669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:38,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563170120] [2024-11-13 12:57:38,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:57:38,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:38,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:38,167 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:38,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 12:57:38,439 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:57:38,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:38,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-13 12:57:38,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:57:40,026 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:57:40,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 290 [2024-11-13 12:57:41,513 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:57:41,513 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:57:45,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:57:45,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 378 treesize of output 356 [2024-11-13 12:57:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:57:47,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563170120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:57:47,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:57:47,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 35 [2024-11-13 12:57:47,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584644906] [2024-11-13 12:57:47,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:57:47,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-13 12:57:47,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:57:47,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-13 12:57:47,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2024-11-13 12:57:47,326 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:57:47,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 121 transitions, 947 flow. Second operand has 35 states, 35 states have (on average 5.3428571428571425) internal successors, (187), 35 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:47,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:57:47,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:57:47,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:57:52,255 INFO L124 PetriNetUnfolderBase]: 1384/2483 cut-off events. [2024-11-13 12:57:52,255 INFO L125 PetriNetUnfolderBase]: For 4986/4986 co-relation queries the response was YES. [2024-11-13 12:57:52,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7698 conditions, 2483 events. 1384/2483 cut-off events. For 4986/4986 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13599 event pairs, 240 based on Foata normal form. 1/2484 useless extension candidates. Maximal degree in co-relation 7624. Up to 585 conditions per place. [2024-11-13 12:57:52,271 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 114 selfloop transitions, 83 changer transitions 16/214 dead transitions. [2024-11-13 12:57:52,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 214 transitions, 1651 flow [2024-11-13 12:57:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 12:57:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-13 12:57:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 235 transitions. [2024-11-13 12:57:52,275 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2658371040723982 [2024-11-13 12:57:52,275 INFO L175 Difference]: Start difference. First operand has 123 places, 121 transitions, 947 flow. Second operand 26 states and 235 transitions. [2024-11-13 12:57:52,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 214 transitions, 1651 flow [2024-11-13 12:57:52,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 214 transitions, 1562 flow, removed 8 selfloop flow, removed 18 redundant places. [2024-11-13 12:57:52,301 INFO L231 Difference]: Finished difference. Result has 133 places, 124 transitions, 1075 flow [2024-11-13 12:57:52,302 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1075, PETRI_PLACES=133, PETRI_TRANSITIONS=124} [2024-11-13 12:57:52,302 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 103 predicate places. [2024-11-13 12:57:52,302 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 124 transitions, 1075 flow [2024-11-13 12:57:52,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.3428571428571425) internal successors, (187), 35 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:57:52,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:57:52,303 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:57:52,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 12:57:52,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 12:57:52,504 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:57:52,504 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:57:52,504 INFO L85 PathProgramCache]: Analyzing trace with hash -946240123, now seen corresponding path program 5 times [2024-11-13 12:57:52,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:57:52,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180430461] [2024-11-13 12:57:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:57:52,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:57:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:57:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:57:59,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:57:59,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180430461] [2024-11-13 12:57:59,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180430461] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:57:59,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36106887] [2024-11-13 12:57:59,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:57:59,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:57:59,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:57:59,253 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:57:59,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 12:57:59,707 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 12:57:59,707 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:57:59,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-13 12:57:59,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:01,175 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:58:01,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 326 treesize of output 278 [2024-11-13 12:58:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:58:02,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:06,289 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 12:58:06,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 355 treesize of output 320 [2024-11-13 12:58:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:58:07,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36106887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:07,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:07,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10, 8] total 37 [2024-11-13 12:58:07,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289979478] [2024-11-13 12:58:07,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:07,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 12:58:07,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:07,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 12:58:07,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 12:58:07,905 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:58:07,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 124 transitions, 1075 flow. Second operand has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:07,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:58:07,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:58:07,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:58:13,601 INFO L124 PetriNetUnfolderBase]: 1811/3225 cut-off events. [2024-11-13 12:58:13,601 INFO L125 PetriNetUnfolderBase]: For 9298/9298 co-relation queries the response was YES. [2024-11-13 12:58:13,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11190 conditions, 3225 events. 1811/3225 cut-off events. For 9298/9298 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 18696 event pairs, 383 based on Foata normal form. 1/3226 useless extension candidates. Maximal degree in co-relation 11120. Up to 685 conditions per place. [2024-11-13 12:58:13,627 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 161 selfloop transitions, 91 changer transitions 21/274 dead transitions. [2024-11-13 12:58:13,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 274 transitions, 2393 flow [2024-11-13 12:58:13,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-13 12:58:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-13 12:58:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 275 transitions. [2024-11-13 12:58:13,630 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2696078431372549 [2024-11-13 12:58:13,630 INFO L175 Difference]: Start difference. First operand has 133 places, 124 transitions, 1075 flow. Second operand 30 states and 275 transitions. [2024-11-13 12:58:13,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 274 transitions, 2393 flow [2024-11-13 12:58:13,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 274 transitions, 2287 flow, removed 4 selfloop flow, removed 18 redundant places. [2024-11-13 12:58:13,692 INFO L231 Difference]: Finished difference. Result has 150 places, 151 transitions, 1569 flow [2024-11-13 12:58:13,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1569, PETRI_PLACES=150, PETRI_TRANSITIONS=151} [2024-11-13 12:58:13,693 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-11-13 12:58:13,693 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 151 transitions, 1569 flow [2024-11-13 12:58:13,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.486486486486487) internal successors, (203), 37 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:13,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:58:13,694 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:13,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 12:58:13,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:13,895 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:58:13,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:13,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1324384951, now seen corresponding path program 6 times [2024-11-13 12:58:13,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:13,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609207858] [2024-11-13 12:58:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:13,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:21,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:21,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609207858] [2024-11-13 12:58:21,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609207858] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:21,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584882670] [2024-11-13 12:58:21,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:58:21,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:21,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:21,270 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:21,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 12:58:21,556 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-13 12:58:21,556 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:21,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-13 12:58:21,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:23,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:58:23,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 380 treesize of output 312 [2024-11-13 12:58:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:58:25,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:28,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:58:28,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 430 treesize of output 402 [2024-11-13 12:58:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:58:31,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584882670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:31,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:31,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 8] total 38 [2024-11-13 12:58:31,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826039898] [2024-11-13 12:58:31,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:31,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-13 12:58:31,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:31,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-13 12:58:31,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 12:58:31,536 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:58:31,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 151 transitions, 1569 flow. Second operand has 38 states, 38 states have (on average 5.421052631578948) internal successors, (206), 38 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:31,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:58:31,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:58:31,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:58:40,207 INFO L124 PetriNetUnfolderBase]: 2380/4282 cut-off events. [2024-11-13 12:58:40,207 INFO L125 PetriNetUnfolderBase]: For 16985/16985 co-relation queries the response was YES. [2024-11-13 12:58:40,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15723 conditions, 4282 events. 2380/4282 cut-off events. For 16985/16985 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 26630 event pairs, 602 based on Foata normal form. 13/4295 useless extension candidates. Maximal degree in co-relation 15605. Up to 1373 conditions per place. [2024-11-13 12:58:40,249 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 187 selfloop transitions, 131 changer transitions 29/348 dead transitions. [2024-11-13 12:58:40,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 348 transitions, 3478 flow [2024-11-13 12:58:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-13 12:58:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-13 12:58:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 339 transitions. [2024-11-13 12:58:40,253 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.26238390092879255 [2024-11-13 12:58:40,253 INFO L175 Difference]: Start difference. First operand has 150 places, 151 transitions, 1569 flow. Second operand 38 states and 339 transitions. [2024-11-13 12:58:40,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 348 transitions, 3478 flow [2024-11-13 12:58:40,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 348 transitions, 3212 flow, removed 94 selfloop flow, removed 15 redundant places. [2024-11-13 12:58:40,377 INFO L231 Difference]: Finished difference. Result has 180 places, 205 transitions, 2392 flow [2024-11-13 12:58:40,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2392, PETRI_PLACES=180, PETRI_TRANSITIONS=205} [2024-11-13 12:58:40,378 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2024-11-13 12:58:40,378 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 205 transitions, 2392 flow [2024-11-13 12:58:40,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.421052631578948) internal successors, (206), 38 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:40,379 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:58:40,379 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:40,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 12:58:40,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-13 12:58:40,580 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:58:40,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:40,580 INFO L85 PathProgramCache]: Analyzing trace with hash -950821643, now seen corresponding path program 7 times [2024-11-13 12:58:40,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:40,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384632389] [2024-11-13 12:58:40,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:40,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:44,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:44,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384632389] [2024-11-13 12:58:44,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384632389] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:44,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459752307] [2024-11-13 12:58:44,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:58:44,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:44,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:44,558 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:44,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-13 12:58:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:44,845 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 12:58:44,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:58:45,376 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:46,285 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 12:58:46,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-11-13 12:58:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:58:46,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459752307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:46,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:46,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7, 7] total 30 [2024-11-13 12:58:46,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516505183] [2024-11-13 12:58:46,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:46,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 12:58:46,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:46,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 12:58:46,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2024-11-13 12:58:46,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:58:46,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 205 transitions, 2392 flow. Second operand has 30 states, 30 states have (on average 5.766666666666667) internal successors, (173), 30 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:46,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:58:46,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:58:46,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:58:49,830 INFO L124 PetriNetUnfolderBase]: 2402/4301 cut-off events. [2024-11-13 12:58:49,831 INFO L125 PetriNetUnfolderBase]: For 19681/19681 co-relation queries the response was YES. [2024-11-13 12:58:49,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16446 conditions, 4301 events. 2402/4301 cut-off events. For 19681/19681 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 26701 event pairs, 543 based on Foata normal form. 21/4322 useless extension candidates. Maximal degree in co-relation 16310. Up to 814 conditions per place. [2024-11-13 12:58:49,861 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 182 selfloop transitions, 120 changer transitions 11/314 dead transitions. [2024-11-13 12:58:49,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 314 transitions, 3702 flow [2024-11-13 12:58:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 12:58:49,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-13 12:58:49,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 222 transitions. [2024-11-13 12:58:49,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.27205882352941174 [2024-11-13 12:58:49,864 INFO L175 Difference]: Start difference. First operand has 180 places, 205 transitions, 2392 flow. Second operand 24 states and 222 transitions. [2024-11-13 12:58:49,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 314 transitions, 3702 flow [2024-11-13 12:58:50,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 314 transitions, 3328 flow, removed 162 selfloop flow, removed 20 redundant places. [2024-11-13 12:58:50,039 INFO L231 Difference]: Finished difference. Result has 183 places, 214 transitions, 2471 flow [2024-11-13 12:58:50,040 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2471, PETRI_PLACES=183, PETRI_TRANSITIONS=214} [2024-11-13 12:58:50,040 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 153 predicate places. [2024-11-13 12:58:50,040 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 214 transitions, 2471 flow [2024-11-13 12:58:50,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.766666666666667) internal successors, (173), 30 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:50,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:58:50,041 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:58:50,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-13 12:58:50,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:50,242 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:58:50,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:58:50,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1533192038, now seen corresponding path program 8 times [2024-11-13 12:58:50,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:58:50,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831683187] [2024-11-13 12:58:50,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:58:50,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:58:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:58:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:58:54,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:58:54,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831683187] [2024-11-13 12:58:54,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831683187] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:58:54,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346416935] [2024-11-13 12:58:54,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 12:58:54,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:58:54,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:58:54,425 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:58:54,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-13 12:58:54,751 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 12:58:54,751 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:58:54,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-13 12:58:54,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:58:56,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:58:56,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 108 [2024-11-13 12:58:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:58:56,578 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:58:57,524 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 12:58:57,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-11-13 12:58:58,200 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:58:58,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346416935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:58:58,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:58:58,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 9] total 39 [2024-11-13 12:58:58,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271236876] [2024-11-13 12:58:58,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:58:58,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-13 12:58:58,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:58:58,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-13 12:58:58,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2024-11-13 12:58:58,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:58:58,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 214 transitions, 2471 flow. Second operand has 39 states, 39 states have (on average 5.3076923076923075) internal successors, (207), 39 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:58:58,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:58:58,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:58:58,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:04,620 INFO L124 PetriNetUnfolderBase]: 2542/4545 cut-off events. [2024-11-13 12:59:04,620 INFO L125 PetriNetUnfolderBase]: For 21576/21576 co-relation queries the response was YES. [2024-11-13 12:59:04,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17304 conditions, 4545 events. 2542/4545 cut-off events. For 21576/21576 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 28692 event pairs, 927 based on Foata normal form. 10/4555 useless extension candidates. Maximal degree in co-relation 17236. Up to 1748 conditions per place. [2024-11-13 12:59:04,651 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 219 selfloop transitions, 135 changer transitions 12/367 dead transitions. [2024-11-13 12:59:04,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 367 transitions, 4213 flow [2024-11-13 12:59:04,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-13 12:59:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-13 12:59:04,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 273 transitions. [2024-11-13 12:59:04,654 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2509191176470588 [2024-11-13 12:59:04,654 INFO L175 Difference]: Start difference. First operand has 183 places, 214 transitions, 2471 flow. Second operand 32 states and 273 transitions. [2024-11-13 12:59:04,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 367 transitions, 4213 flow [2024-11-13 12:59:04,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 367 transitions, 4074 flow, removed 32 selfloop flow, removed 12 redundant places. [2024-11-13 12:59:04,795 INFO L231 Difference]: Finished difference. Result has 213 places, 253 transitions, 3184 flow [2024-11-13 12:59:04,795 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3184, PETRI_PLACES=213, PETRI_TRANSITIONS=253} [2024-11-13 12:59:04,796 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-11-13 12:59:04,796 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 253 transitions, 3184 flow [2024-11-13 12:59:04,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.3076923076923075) internal successors, (207), 39 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:04,797 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:04,797 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:04,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-13 12:59:04,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 12:59:04,998 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:59:04,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash -469170207, now seen corresponding path program 9 times [2024-11-13 12:59:04,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:04,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473386492] [2024-11-13 12:59:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:04,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:08,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:08,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473386492] [2024-11-13 12:59:08,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473386492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:08,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166731209] [2024-11-13 12:59:08,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 12:59:08,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:08,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:08,837 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:08,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-13 12:59:09,211 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 12:59:09,211 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:59:09,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 12:59:09,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:59:10,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:11,203 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 12:59:11,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-11-13 12:59:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:59:11,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166731209] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:11,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:11,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 8] total 37 [2024-11-13 12:59:11,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567007354] [2024-11-13 12:59:11,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:11,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 12:59:11,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 12:59:11,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 12:59:11,360 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:59:11,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 253 transitions, 3184 flow. Second operand has 37 states, 37 states have (on average 5.378378378378378) internal successors, (199), 37 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:11,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:11,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:59:11,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:16,253 INFO L124 PetriNetUnfolderBase]: 2539/4563 cut-off events. [2024-11-13 12:59:16,253 INFO L125 PetriNetUnfolderBase]: For 35115/35115 co-relation queries the response was YES. [2024-11-13 12:59:16,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22875 conditions, 4563 events. 2539/4563 cut-off events. For 35115/35115 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 28937 event pairs, 512 based on Foata normal form. 16/4579 useless extension candidates. Maximal degree in co-relation 22788. Up to 1615 conditions per place. [2024-11-13 12:59:16,291 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 245 selfloop transitions, 147 changer transitions 10/403 dead transitions. [2024-11-13 12:59:16,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 403 transitions, 5236 flow [2024-11-13 12:59:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-13 12:59:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-13 12:59:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 264 transitions. [2024-11-13 12:59:16,293 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.23529411764705882 [2024-11-13 12:59:16,293 INFO L175 Difference]: Start difference. First operand has 213 places, 253 transitions, 3184 flow. Second operand 33 states and 264 transitions. [2024-11-13 12:59:16,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 403 transitions, 5236 flow [2024-11-13 12:59:16,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 403 transitions, 5075 flow, removed 56 selfloop flow, removed 16 redundant places. [2024-11-13 12:59:16,539 INFO L231 Difference]: Finished difference. Result has 241 places, 292 transitions, 3971 flow [2024-11-13 12:59:16,540 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3034, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3971, PETRI_PLACES=241, PETRI_TRANSITIONS=292} [2024-11-13 12:59:16,542 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-11-13 12:59:16,542 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 292 transitions, 3971 flow [2024-11-13 12:59:16,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.378378378378378) internal successors, (199), 37 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:16,543 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:16,543 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:16,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-13 12:59:16,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:16,744 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:59:16,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:16,744 INFO L85 PathProgramCache]: Analyzing trace with hash -746129688, now seen corresponding path program 10 times [2024-11-13 12:59:16,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:16,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187708078] [2024-11-13 12:59:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:16,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:20,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:20,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187708078] [2024-11-13 12:59:20,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187708078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:20,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634910719] [2024-11-13 12:59:20,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 12:59:20,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:20,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:20,717 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:20,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-13 12:59:21,075 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 12:59:21,075 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:59:21,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-13 12:59:21,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:21,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:59:21,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 160 [2024-11-13 12:59:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:59:22,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:23,051 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 12:59:23,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-11-13 12:59:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:59:23,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634910719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:23,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:23,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7, 7] total 31 [2024-11-13 12:59:23,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175322259] [2024-11-13 12:59:23,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:23,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 12:59:23,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:23,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 12:59:23,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2024-11-13 12:59:23,746 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:59:23,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 292 transitions, 3971 flow. Second operand has 31 states, 31 states have (on average 5.451612903225806) internal successors, (169), 31 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:23,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:23,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:59:23,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:27,873 INFO L124 PetriNetUnfolderBase]: 2303/4151 cut-off events. [2024-11-13 12:59:27,873 INFO L125 PetriNetUnfolderBase]: For 55763/55763 co-relation queries the response was YES. [2024-11-13 12:59:27,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23897 conditions, 4151 events. 2303/4151 cut-off events. For 55763/55763 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 25747 event pairs, 689 based on Foata normal form. 5/4154 useless extension candidates. Maximal degree in co-relation 23801. Up to 956 conditions per place. [2024-11-13 12:59:27,915 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 228 selfloop transitions, 133 changer transitions 11/373 dead transitions. [2024-11-13 12:59:27,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 373 transitions, 5451 flow [2024-11-13 12:59:27,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 12:59:27,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-13 12:59:27,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 223 transitions. [2024-11-13 12:59:27,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.252262443438914 [2024-11-13 12:59:27,918 INFO L175 Difference]: Start difference. First operand has 241 places, 292 transitions, 3971 flow. Second operand 26 states and 223 transitions. [2024-11-13 12:59:27,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 373 transitions, 5451 flow [2024-11-13 12:59:28,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 373 transitions, 4981 flow, removed 139 selfloop flow, removed 20 redundant places. [2024-11-13 12:59:28,284 INFO L231 Difference]: Finished difference. Result has 246 places, 288 transitions, 3844 flow [2024-11-13 12:59:28,284 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3844, PETRI_PLACES=246, PETRI_TRANSITIONS=288} [2024-11-13 12:59:28,285 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 216 predicate places. [2024-11-13 12:59:28,285 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 288 transitions, 3844 flow [2024-11-13 12:59:28,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.451612903225806) internal successors, (169), 31 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:28,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:28,285 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:28,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-13 12:59:28,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:28,486 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:59:28,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:28,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1099618194, now seen corresponding path program 11 times [2024-11-13 12:59:28,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:28,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218856223] [2024-11-13 12:59:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:28,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:32,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:32,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218856223] [2024-11-13 12:59:32,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218856223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:32,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442586574] [2024-11-13 12:59:32,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 12:59:32,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:32,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:32,121 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:32,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-13 12:59:32,546 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 12:59:32,546 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:59:32,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-13 12:59:32,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:33,677 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:59:33,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 88 [2024-11-13 12:59:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:59:33,859 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:34,452 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 12:59:34,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-11-13 12:59:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:59:35,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442586574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:35,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:35,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 7] total 33 [2024-11-13 12:59:35,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308053306] [2024-11-13 12:59:35,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:35,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 12:59:35,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:35,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 12:59:35,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 12:59:35,009 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:59:35,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 288 transitions, 3844 flow. Second operand has 33 states, 33 states have (on average 5.606060606060606) internal successors, (185), 33 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:35,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:35,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:59:35,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:37,960 INFO L124 PetriNetUnfolderBase]: 2277/4114 cut-off events. [2024-11-13 12:59:37,960 INFO L125 PetriNetUnfolderBase]: For 47136/47136 co-relation queries the response was YES. [2024-11-13 12:59:37,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21906 conditions, 4114 events. 2277/4114 cut-off events. For 47136/47136 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 25558 event pairs, 731 based on Foata normal form. 5/4117 useless extension candidates. Maximal degree in co-relation 21813. Up to 956 conditions per place. [2024-11-13 12:59:38,000 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 215 selfloop transitions, 120 changer transitions 17/353 dead transitions. [2024-11-13 12:59:38,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 353 transitions, 5051 flow [2024-11-13 12:59:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-13 12:59:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-13 12:59:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 170 transitions. [2024-11-13 12:59:38,002 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.25 [2024-11-13 12:59:38,002 INFO L175 Difference]: Start difference. First operand has 246 places, 288 transitions, 3844 flow. Second operand 20 states and 170 transitions. [2024-11-13 12:59:38,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 353 transitions, 5051 flow [2024-11-13 12:59:38,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 353 transitions, 4847 flow, removed 14 selfloop flow, removed 21 redundant places. [2024-11-13 12:59:38,232 INFO L231 Difference]: Finished difference. Result has 243 places, 281 transitions, 3784 flow [2024-11-13 12:59:38,233 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3652, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3784, PETRI_PLACES=243, PETRI_TRANSITIONS=281} [2024-11-13 12:59:38,233 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 213 predicate places. [2024-11-13 12:59:38,233 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 281 transitions, 3784 flow [2024-11-13 12:59:38,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.606060606060606) internal successors, (185), 33 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:38,233 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:38,234 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:38,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-13 12:59:38,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:38,434 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:59:38,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:38,434 INFO L85 PathProgramCache]: Analyzing trace with hash -685398204, now seen corresponding path program 12 times [2024-11-13 12:59:38,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:38,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259523334] [2024-11-13 12:59:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:38,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:41,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:41,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259523334] [2024-11-13 12:59:41,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259523334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:41,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128687226] [2024-11-13 12:59:41,857 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 12:59:41,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:41,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:41,858 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:41,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-13 12:59:42,197 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-13 12:59:42,198 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 12:59:42,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-13 12:59:42,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:43,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:59:43,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2024-11-13 12:59:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:59:43,566 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:44,303 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 12:59:44,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-11-13 12:59:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:59:44,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128687226] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:44,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:44,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11, 9] total 38 [2024-11-13 12:59:44,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682930857] [2024-11-13 12:59:44,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:44,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-13 12:59:44,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:44,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-13 12:59:44,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1278, Unknown=0, NotChecked=0, Total=1406 [2024-11-13 12:59:44,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:59:44,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 281 transitions, 3784 flow. Second operand has 38 states, 38 states have (on average 5.368421052631579) internal successors, (204), 38 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:44,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:44,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:59:44,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:48,167 INFO L124 PetriNetUnfolderBase]: 2169/3911 cut-off events. [2024-11-13 12:59:48,167 INFO L125 PetriNetUnfolderBase]: For 46211/46211 co-relation queries the response was YES. [2024-11-13 12:59:48,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21142 conditions, 3911 events. 2169/3911 cut-off events. For 46211/46211 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 24064 event pairs, 854 based on Foata normal form. 10/3919 useless extension candidates. Maximal degree in co-relation 21090. Up to 1813 conditions per place. [2024-11-13 12:59:48,189 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 238 selfloop transitions, 101 changer transitions 18/358 dead transitions. [2024-11-13 12:59:48,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 358 transitions, 5144 flow [2024-11-13 12:59:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-13 12:59:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-13 12:59:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 173 transitions. [2024-11-13 12:59:48,191 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.23128342245989306 [2024-11-13 12:59:48,191 INFO L175 Difference]: Start difference. First operand has 243 places, 281 transitions, 3784 flow. Second operand 22 states and 173 transitions. [2024-11-13 12:59:48,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 358 transitions, 5144 flow [2024-11-13 12:59:48,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 358 transitions, 4843 flow, removed 10 selfloop flow, removed 19 redundant places. [2024-11-13 12:59:48,353 INFO L231 Difference]: Finished difference. Result has 241 places, 273 transitions, 3556 flow [2024-11-13 12:59:48,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3449, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3556, PETRI_PLACES=241, PETRI_TRANSITIONS=273} [2024-11-13 12:59:48,353 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 211 predicate places. [2024-11-13 12:59:48,353 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 273 transitions, 3556 flow [2024-11-13 12:59:48,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.368421052631579) internal successors, (204), 38 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:48,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:48,354 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:48,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-13 12:59:48,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:48,554 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:59:48,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:48,555 INFO L85 PathProgramCache]: Analyzing trace with hash -849845633, now seen corresponding path program 13 times [2024-11-13 12:59:48,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:48,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452349886] [2024-11-13 12:59:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:48,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 12:59:52,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 12:59:52,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452349886] [2024-11-13 12:59:52,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452349886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 12:59:52,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179130137] [2024-11-13 12:59:52,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 12:59:52,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 12:59:52,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 12:59:52,272 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 12:59:52,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-13 12:59:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 12:59:52,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 12:59:52,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 12:59:53,043 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 12:59:53,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 141 [2024-11-13 12:59:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:59:53,480 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 12:59:54,370 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 12:59:54,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-11-13 12:59:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 12:59:54,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179130137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 12:59:54,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 12:59:54,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 7] total 32 [2024-11-13 12:59:54,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76864744] [2024-11-13 12:59:54,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 12:59:54,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-13 12:59:54,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 12:59:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-13 12:59:54,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2024-11-13 12:59:54,463 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 12:59:54,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 273 transitions, 3556 flow. Second operand has 32 states, 32 states have (on average 5.5) internal successors, (176), 32 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:54,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 12:59:54,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 12:59:54,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 12:59:58,335 INFO L124 PetriNetUnfolderBase]: 2349/4216 cut-off events. [2024-11-13 12:59:58,335 INFO L125 PetriNetUnfolderBase]: For 47319/47319 co-relation queries the response was YES. [2024-11-13 12:59:58,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22594 conditions, 4216 events. 2349/4216 cut-off events. For 47319/47319 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 26185 event pairs, 397 based on Foata normal form. 11/4221 useless extension candidates. Maximal degree in co-relation 22543. Up to 1336 conditions per place. [2024-11-13 12:59:58,371 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 224 selfloop transitions, 150 changer transitions 3/378 dead transitions. [2024-11-13 12:59:58,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 378 transitions, 5319 flow [2024-11-13 12:59:58,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 12:59:58,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-13 12:59:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 229 transitions. [2024-11-13 12:59:58,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.23225152129817445 [2024-11-13 12:59:58,373 INFO L175 Difference]: Start difference. First operand has 241 places, 273 transitions, 3556 flow. Second operand 29 states and 229 transitions. [2024-11-13 12:59:58,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 378 transitions, 5319 flow [2024-11-13 12:59:58,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 378 transitions, 5110 flow, removed 23 selfloop flow, removed 19 redundant places. [2024-11-13 12:59:58,577 INFO L231 Difference]: Finished difference. Result has 250 places, 294 transitions, 4072 flow [2024-11-13 12:59:58,577 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4072, PETRI_PLACES=250, PETRI_TRANSITIONS=294} [2024-11-13 12:59:58,578 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-11-13 12:59:58,578 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 294 transitions, 4072 flow [2024-11-13 12:59:58,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.5) internal successors, (176), 32 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 12:59:58,578 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 12:59:58,578 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 12:59:58,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-13 12:59:58,779 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-13 12:59:58,779 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 12:59:58,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 12:59:58,779 INFO L85 PathProgramCache]: Analyzing trace with hash 855561331, now seen corresponding path program 14 times [2024-11-13 12:59:58,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 12:59:58,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804755053] [2024-11-13 12:59:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 12:59:58,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 12:59:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:00:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:02,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:00:02,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804755053] [2024-11-13 13:00:02,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804755053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:00:02,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500317503] [2024-11-13 13:00:02,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:00:02,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:02,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:02,432 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:02,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-13 13:00:02,789 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:00:02,789 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:00:02,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 13:00:02,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:00:03,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:00:03,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 137 [2024-11-13 13:00:03,849 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:00:03,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:00:04,779 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 13:00:04,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-11-13 13:00:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:00:04,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500317503] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:00:04,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:00:04,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 8] total 34 [2024-11-13 13:00:04,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359630591] [2024-11-13 13:00:04,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:00:04,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-13 13:00:04,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:00:04,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-13 13:00:04,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2024-11-13 13:00:04,840 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 13:00:04,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 294 transitions, 4072 flow. Second operand has 34 states, 34 states have (on average 5.411764705882353) internal successors, (184), 34 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:04,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:00:04,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 13:00:04,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:00:09,869 INFO L124 PetriNetUnfolderBase]: 4716/8420 cut-off events. [2024-11-13 13:00:09,869 INFO L125 PetriNetUnfolderBase]: For 99951/99951 co-relation queries the response was YES. [2024-11-13 13:00:09,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46208 conditions, 8420 events. 4716/8420 cut-off events. For 99951/99951 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 59235 event pairs, 914 based on Foata normal form. 8/8416 useless extension candidates. Maximal degree in co-relation 46154. Up to 1604 conditions per place. [2024-11-13 13:00:09,952 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 420 selfloop transitions, 286 changer transitions 14/721 dead transitions. [2024-11-13 13:00:09,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 721 transitions, 10787 flow [2024-11-13 13:00:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-13 13:00:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-13 13:00:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 357 transitions. [2024-11-13 13:00:09,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.25609756097560976 [2024-11-13 13:00:09,955 INFO L175 Difference]: Start difference. First operand has 250 places, 294 transitions, 4072 flow. Second operand 41 states and 357 transitions. [2024-11-13 13:00:09,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 721 transitions, 10787 flow [2024-11-13 13:00:10,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 721 transitions, 10405 flow, removed 30 selfloop flow, removed 22 redundant places. [2024-11-13 13:00:10,492 INFO L231 Difference]: Finished difference. Result has 275 places, 440 transitions, 7239 flow [2024-11-13 13:00:10,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=7239, PETRI_PLACES=275, PETRI_TRANSITIONS=440} [2024-11-13 13:00:10,493 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 245 predicate places. [2024-11-13 13:00:10,493 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 440 transitions, 7239 flow [2024-11-13 13:00:10,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.411764705882353) internal successors, (184), 34 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:10,493 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:00:10,493 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:00:10,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-13 13:00:10,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:10,694 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:00:10,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:00:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1007456046, now seen corresponding path program 15 times [2024-11-13 13:00:10,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:00:10,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812498860] [2024-11-13 13:00:10,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:00:10,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:00:10,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:00:14,168 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:14,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:00:14,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812498860] [2024-11-13 13:00:14,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812498860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:00:14,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842829420] [2024-11-13 13:00:14,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:00:14,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:14,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:14,171 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:14,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-13 13:00:14,553 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-13 13:00:14,553 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:00:14,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-13 13:00:14,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:00:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:00:15,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:00:16,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:00:16,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-11-13 13:00:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:00:16,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842829420] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:00:16,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:00:16,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 8] total 36 [2024-11-13 13:00:16,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730307177] [2024-11-13 13:00:16,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:00:16,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 13:00:16,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:00:16,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 13:00:16,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 13:00:16,480 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 13:00:16,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 440 transitions, 7239 flow. Second operand has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:16,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:00:16,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 13:00:16,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:00:20,314 INFO L124 PetriNetUnfolderBase]: 4870/8674 cut-off events. [2024-11-13 13:00:20,314 INFO L125 PetriNetUnfolderBase]: For 117347/117347 co-relation queries the response was YES. [2024-11-13 13:00:20,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48717 conditions, 8674 events. 4870/8674 cut-off events. For 117347/117347 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 61196 event pairs, 1584 based on Foata normal form. 28/8688 useless extension candidates. Maximal degree in co-relation 48656. Up to 3995 conditions per place. [2024-11-13 13:00:20,408 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 263 selfloop transitions, 236 changer transitions 1/501 dead transitions. [2024-11-13 13:00:20,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 501 transitions, 8858 flow [2024-11-13 13:00:20,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 13:00:20,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-13 13:00:20,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 187 transitions. [2024-11-13 13:00:20,409 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.21153846153846154 [2024-11-13 13:00:20,409 INFO L175 Difference]: Start difference. First operand has 275 places, 440 transitions, 7239 flow. Second operand 26 states and 187 transitions. [2024-11-13 13:00:20,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 501 transitions, 8858 flow [2024-11-13 13:00:21,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 501 transitions, 8851 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-13 13:00:21,046 INFO L231 Difference]: Finished difference. Result has 296 places, 449 transitions, 7930 flow [2024-11-13 13:00:21,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=7232, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7930, PETRI_PLACES=296, PETRI_TRANSITIONS=449} [2024-11-13 13:00:21,047 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-11-13 13:00:21,047 INFO L471 AbstractCegarLoop]: Abstraction has has 296 places, 449 transitions, 7930 flow [2024-11-13 13:00:21,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.5) internal successors, (198), 36 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:21,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:00:21,048 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:00:21,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-13 13:00:21,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-13 13:00:21,248 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:00:21,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:00:21,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1139471782, now seen corresponding path program 16 times [2024-11-13 13:00:21,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:00:21,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325858988] [2024-11-13 13:00:21,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:00:21,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:00:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:00:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:24,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:00:24,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325858988] [2024-11-13 13:00:24,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325858988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:00:24,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584775777] [2024-11-13 13:00:24,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:00:24,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:24,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:24,590 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:24,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-13 13:00:24,990 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:00:24,990 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:00:24,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-13 13:00:24,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:00:25,503 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:00:25,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 172 [2024-11-13 13:00:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:00:25,948 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:00:26,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:00:26,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-11-13 13:00:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:00:27,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584775777] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:00:27,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:00:27,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7, 7] total 31 [2024-11-13 13:00:27,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129871143] [2024-11-13 13:00:27,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:00:27,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 13:00:27,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:00:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 13:00:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2024-11-13 13:00:27,052 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 13:00:27,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 449 transitions, 7930 flow. Second operand has 31 states, 31 states have (on average 5.612903225806452) internal successors, (174), 31 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:27,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:00:27,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 13:00:27,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:00:31,727 INFO L124 PetriNetUnfolderBase]: 5150/9186 cut-off events. [2024-11-13 13:00:31,727 INFO L125 PetriNetUnfolderBase]: For 131957/131957 co-relation queries the response was YES. [2024-11-13 13:00:31,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52440 conditions, 9186 events. 5150/9186 cut-off events. For 131957/131957 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 65639 event pairs, 1366 based on Foata normal form. 20/9192 useless extension candidates. Maximal degree in co-relation 52379. Up to 3655 conditions per place. [2024-11-13 13:00:31,825 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 271 selfloop transitions, 252 changer transitions 2/526 dead transitions. [2024-11-13 13:00:31,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 526 transitions, 9657 flow [2024-11-13 13:00:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-13 13:00:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-13 13:00:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 195 transitions. [2024-11-13 13:00:31,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.23897058823529413 [2024-11-13 13:00:31,826 INFO L175 Difference]: Start difference. First operand has 296 places, 449 transitions, 7930 flow. Second operand 24 states and 195 transitions. [2024-11-13 13:00:31,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 526 transitions, 9657 flow [2024-11-13 13:00:32,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 526 transitions, 9356 flow, removed 20 selfloop flow, removed 21 redundant places. [2024-11-13 13:00:32,442 INFO L231 Difference]: Finished difference. Result has 300 places, 454 transitions, 8294 flow [2024-11-13 13:00:32,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=7645, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8294, PETRI_PLACES=300, PETRI_TRANSITIONS=454} [2024-11-13 13:00:32,443 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 270 predicate places. [2024-11-13 13:00:32,443 INFO L471 AbstractCegarLoop]: Abstraction has has 300 places, 454 transitions, 8294 flow [2024-11-13 13:00:32,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.612903225806452) internal successors, (174), 31 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:32,444 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:00:32,444 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:00:32,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-13 13:00:32,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-13 13:00:32,644 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:00:32,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:00:32,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1410677081, now seen corresponding path program 17 times [2024-11-13 13:00:32,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:00:32,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443015395] [2024-11-13 13:00:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:00:32,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:00:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:00:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:36,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:00:36,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443015395] [2024-11-13 13:00:36,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443015395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:00:36,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059358221] [2024-11-13 13:00:36,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:00:36,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:36,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:36,117 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:36,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-13 13:00:36,537 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 13:00:36,538 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:00:36,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-13 13:00:36,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:00:37,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:00:37,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 110 [2024-11-13 13:00:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:00:37,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:00:38,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:00:38,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 194 [2024-11-13 13:00:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:00:39,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059358221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:00:39,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:00:39,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 9] total 37 [2024-11-13 13:00:39,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24637046] [2024-11-13 13:00:39,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:00:39,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-13 13:00:39,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:00:39,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-13 13:00:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2024-11-13 13:00:39,050 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 13:00:39,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 454 transitions, 8294 flow. Second operand has 37 states, 37 states have (on average 5.324324324324325) internal successors, (197), 37 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:39,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:00:39,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 13:00:39,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:00:45,133 INFO L124 PetriNetUnfolderBase]: 6344/11470 cut-off events. [2024-11-13 13:00:45,134 INFO L125 PetriNetUnfolderBase]: For 170570/170570 co-relation queries the response was YES. [2024-11-13 13:00:45,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66039 conditions, 11470 events. 6344/11470 cut-off events. For 170570/170570 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 87160 event pairs, 1852 based on Foata normal form. 44/11502 useless extension candidates. Maximal degree in co-relation 65976. Up to 6139 conditions per place. [2024-11-13 13:00:45,261 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 382 selfloop transitions, 314 changer transitions 4/701 dead transitions. [2024-11-13 13:00:45,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 701 transitions, 12954 flow [2024-11-13 13:00:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-13 13:00:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-13 13:00:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 306 transitions. [2024-11-13 13:00:45,263 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24324324324324326 [2024-11-13 13:00:45,263 INFO L175 Difference]: Start difference. First operand has 300 places, 454 transitions, 8294 flow. Second operand 37 states and 306 transitions. [2024-11-13 13:00:45,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 701 transitions, 12954 flow [2024-11-13 13:00:46,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 701 transitions, 12314 flow, removed 12 selfloop flow, removed 20 redundant places. [2024-11-13 13:00:46,052 INFO L231 Difference]: Finished difference. Result has 320 places, 563 transitions, 10410 flow [2024-11-13 13:00:46,053 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=7815, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10410, PETRI_PLACES=320, PETRI_TRANSITIONS=563} [2024-11-13 13:00:46,053 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 290 predicate places. [2024-11-13 13:00:46,053 INFO L471 AbstractCegarLoop]: Abstraction has has 320 places, 563 transitions, 10410 flow [2024-11-13 13:00:46,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.324324324324325) internal successors, (197), 37 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:46,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:00:46,054 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:00:46,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-13 13:00:46,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-13 13:00:46,254 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:00:46,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:00:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2044421435, now seen corresponding path program 18 times [2024-11-13 13:00:46,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:00:46,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112945770] [2024-11-13 13:00:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:00:46,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:00:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:00:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:00:50,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:00:50,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112945770] [2024-11-13 13:00:50,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112945770] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:00:50,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880310819] [2024-11-13 13:00:50,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 13:00:50,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:00:50,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:00:50,370 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:00:50,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-13 13:00:50,768 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-13 13:00:50,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:00:50,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 13:00:50,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:00:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:00:51,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:00:52,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:00:52,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-11-13 13:00:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:00:53,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880310819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:00:53,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:00:53,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 8] total 36 [2024-11-13 13:00:53,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506088362] [2024-11-13 13:00:53,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:00:53,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 13:00:53,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:00:53,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 13:00:53,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 13:00:53,142 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 13:00:53,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 563 transitions, 10410 flow. Second operand has 36 states, 36 states have (on average 5.555555555555555) internal successors, (200), 36 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:00:53,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:00:53,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 13:00:53,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:01:00,371 INFO L124 PetriNetUnfolderBase]: 6454/11692 cut-off events. [2024-11-13 13:01:00,371 INFO L125 PetriNetUnfolderBase]: For 177527/177527 co-relation queries the response was YES. [2024-11-13 13:01:00,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71407 conditions, 11692 events. 6454/11692 cut-off events. For 177527/177527 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 88688 event pairs, 1262 based on Foata normal form. 32/11712 useless extension candidates. Maximal degree in co-relation 71340. Up to 2933 conditions per place. [2024-11-13 13:01:00,505 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 256 selfloop transitions, 402 changer transitions 3/662 dead transitions. [2024-11-13 13:01:00,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 662 transitions, 12961 flow [2024-11-13 13:01:00,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-13 13:01:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-13 13:01:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 224 transitions. [2024-11-13 13:01:00,507 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.23529411764705882 [2024-11-13 13:01:00,508 INFO L175 Difference]: Start difference. First operand has 320 places, 563 transitions, 10410 flow. Second operand 28 states and 224 transitions. [2024-11-13 13:01:00,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 662 transitions, 12961 flow [2024-11-13 13:01:01,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 662 transitions, 12665 flow, removed 77 selfloop flow, removed 16 redundant places. [2024-11-13 13:01:01,593 INFO L231 Difference]: Finished difference. Result has 333 places, 591 transitions, 11734 flow [2024-11-13 13:01:01,593 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=10158, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11734, PETRI_PLACES=333, PETRI_TRANSITIONS=591} [2024-11-13 13:01:01,594 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 303 predicate places. [2024-11-13 13:01:01,594 INFO L471 AbstractCegarLoop]: Abstraction has has 333 places, 591 transitions, 11734 flow [2024-11-13 13:01:01,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.555555555555555) internal successors, (200), 36 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:01,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:01:01,594 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:01:01,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-13 13:01:01,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-13 13:01:01,795 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:01:01,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:01:01,795 INFO L85 PathProgramCache]: Analyzing trace with hash 205819156, now seen corresponding path program 19 times [2024-11-13 13:01:01,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:01:01,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001755312] [2024-11-13 13:01:01,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:01:01,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:01:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:01:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 13:01:04,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:01:04,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001755312] [2024-11-13 13:01:04,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001755312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:01:04,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626307417] [2024-11-13 13:01:04,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 13:01:04,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:01:04,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:01:04,289 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:01:04,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-13 13:01:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:01:04,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 13:01:04,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:01:05,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:01:05,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 141 [2024-11-13 13:01:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:01:05,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:01:06,489 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:01:06,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-11-13 13:01:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:01:06,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626307417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:01:06,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:01:06,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 28 [2024-11-13 13:01:06,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170584825] [2024-11-13 13:01:06,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:01:06,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-13 13:01:06,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:01:06,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-13 13:01:06,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2024-11-13 13:01:06,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 13:01:06,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 591 transitions, 11734 flow. Second operand has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:06,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:01:06,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 13:01:06,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:01:11,870 INFO L124 PetriNetUnfolderBase]: 6314/11440 cut-off events. [2024-11-13 13:01:11,870 INFO L125 PetriNetUnfolderBase]: For 181508/181508 co-relation queries the response was YES. [2024-11-13 13:01:11,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70389 conditions, 11440 events. 6314/11440 cut-off events. For 181508/181508 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 86841 event pairs, 1694 based on Foata normal form. 40/11468 useless extension candidates. Maximal degree in co-relation 70323. Up to 4597 conditions per place. [2024-11-13 13:01:12,007 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 305 selfloop transitions, 323 changer transitions 11/640 dead transitions. [2024-11-13 13:01:12,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 640 transitions, 13318 flow [2024-11-13 13:01:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 13:01:12,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 13:01:12,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 160 transitions. [2024-11-13 13:01:12,008 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2768166089965398 [2024-11-13 13:01:12,008 INFO L175 Difference]: Start difference. First operand has 333 places, 591 transitions, 11734 flow. Second operand 17 states and 160 transitions. [2024-11-13 13:01:12,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 640 transitions, 13318 flow [2024-11-13 13:01:13,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 640 transitions, 12935 flow, removed 76 selfloop flow, removed 17 redundant places. [2024-11-13 13:01:13,171 INFO L231 Difference]: Finished difference. Result has 332 places, 583 transitions, 11841 flow [2024-11-13 13:01:13,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=11291, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=11841, PETRI_PLACES=332, PETRI_TRANSITIONS=583} [2024-11-13 13:01:13,172 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 302 predicate places. [2024-11-13 13:01:13,172 INFO L471 AbstractCegarLoop]: Abstraction has has 332 places, 583 transitions, 11841 flow [2024-11-13 13:01:13,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:13,172 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:01:13,172 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:01:13,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-13 13:01:13,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-13 13:01:13,373 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:01:13,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:01:13,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1069185387, now seen corresponding path program 20 times [2024-11-13 13:01:13,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:01:13,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453623976] [2024-11-13 13:01:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:01:13,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:01:13,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:01:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 13:01:16,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:01:16,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453623976] [2024-11-13 13:01:16,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453623976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:01:16,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365186795] [2024-11-13 13:01:16,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 13:01:16,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:01:16,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:01:16,801 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:01:16,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-13 13:01:17,232 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 13:01:17,232 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:01:17,234 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-13 13:01:17,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:01:17,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:01:17,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 137 [2024-11-13 13:01:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:01:18,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:01:19,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:01:19,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-11-13 13:01:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:01:19,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365186795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:01:19,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:01:19,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 30 [2024-11-13 13:01:19,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241620896] [2024-11-13 13:01:19,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:01:19,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-13 13:01:19,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:01:19,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-13 13:01:19,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2024-11-13 13:01:19,443 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 13:01:19,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 583 transitions, 11841 flow. Second operand has 30 states, 30 states have (on average 5.866666666666666) internal successors, (176), 30 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:19,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:01:19,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 13:01:19,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:01:30,397 INFO L124 PetriNetUnfolderBase]: 10019/18129 cut-off events. [2024-11-13 13:01:30,397 INFO L125 PetriNetUnfolderBase]: For 292601/292601 co-relation queries the response was YES. [2024-11-13 13:01:30,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111692 conditions, 18129 events. 10019/18129 cut-off events. For 292601/292601 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 148155 event pairs, 3023 based on Foata normal form. 66/18177 useless extension candidates. Maximal degree in co-relation 111630. Up to 5298 conditions per place. [2024-11-13 13:01:30,770 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 642 selfloop transitions, 615 changer transitions 15/1273 dead transitions. [2024-11-13 13:01:30,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1273 transitions, 24811 flow [2024-11-13 13:01:30,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-13 13:01:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-11-13 13:01:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 583 transitions. [2024-11-13 13:01:30,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2956389452332657 [2024-11-13 13:01:30,773 INFO L175 Difference]: Start difference. First operand has 332 places, 583 transitions, 11841 flow. Second operand 58 states and 583 transitions. [2024-11-13 13:01:30,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1273 transitions, 24811 flow [2024-11-13 13:01:32,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1273 transitions, 23741 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-11-13 13:01:32,801 INFO L231 Difference]: Finished difference. Result has 386 places, 835 transitions, 18660 flow [2024-11-13 13:01:32,802 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=11191, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=18660, PETRI_PLACES=386, PETRI_TRANSITIONS=835} [2024-11-13 13:01:32,803 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 356 predicate places. [2024-11-13 13:01:32,803 INFO L471 AbstractCegarLoop]: Abstraction has has 386 places, 835 transitions, 18660 flow [2024-11-13 13:01:32,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.866666666666666) internal successors, (176), 30 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:32,803 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:01:32,803 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:01:32,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-13 13:01:33,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-13 13:01:33,004 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:01:33,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:01:33,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1434316891, now seen corresponding path program 21 times [2024-11-13 13:01:33,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:01:33,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997328614] [2024-11-13 13:01:33,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:01:33,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:01:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:01:36,974 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:01:36,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:01:36,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997328614] [2024-11-13 13:01:36,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997328614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:01:36,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755077103] [2024-11-13 13:01:36,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 13:01:36,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:01:36,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:01:36,977 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:01:36,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-13 13:01:37,466 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-13 13:01:37,466 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:01:37,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-13 13:01:37,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:01:38,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:01:38,559 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 108 [2024-11-13 13:01:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:01:38,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:01:39,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:01:39,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 194 [2024-11-13 13:01:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:01:40,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755077103] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:01:40,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:01:40,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 8] total 36 [2024-11-13 13:01:40,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531525043] [2024-11-13 13:01:40,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:01:40,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 13:01:40,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:01:40,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 13:01:40,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 13:01:40,872 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 13:01:40,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 835 transitions, 18660 flow. Second operand has 36 states, 36 states have (on average 5.333333333333333) internal successors, (192), 36 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:40,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:01:40,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 13:01:40,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:01:52,388 INFO L124 PetriNetUnfolderBase]: 10007/18141 cut-off events. [2024-11-13 13:01:52,388 INFO L125 PetriNetUnfolderBase]: For 302828/302828 co-relation queries the response was YES. [2024-11-13 13:01:52,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114338 conditions, 18141 events. 10007/18141 cut-off events. For 302828/302828 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 148555 event pairs, 2599 based on Foata normal form. 48/18169 useless extension candidates. Maximal degree in co-relation 114261. Up to 6935 conditions per place. [2024-11-13 13:01:52,765 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 308 selfloop transitions, 627 changer transitions 8/944 dead transitions. [2024-11-13 13:01:52,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 944 transitions, 21836 flow [2024-11-13 13:01:52,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-13 13:01:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-13 13:01:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 218 transitions. [2024-11-13 13:01:52,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24660633484162897 [2024-11-13 13:01:52,767 INFO L175 Difference]: Start difference. First operand has 386 places, 835 transitions, 18660 flow. Second operand 26 states and 218 transitions. [2024-11-13 13:01:52,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 944 transitions, 21836 flow [2024-11-13 13:01:55,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 944 transitions, 21398 flow, removed 93 selfloop flow, removed 13 redundant places. [2024-11-13 13:01:55,448 INFO L231 Difference]: Finished difference. Result has 401 places, 875 transitions, 20515 flow [2024-11-13 13:01:55,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=18144, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=583, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=20515, PETRI_PLACES=401, PETRI_TRANSITIONS=875} [2024-11-13 13:01:55,450 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 371 predicate places. [2024-11-13 13:01:55,450 INFO L471 AbstractCegarLoop]: Abstraction has has 401 places, 875 transitions, 20515 flow [2024-11-13 13:01:55,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.333333333333333) internal successors, (192), 36 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:01:55,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:01:55,451 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:01:55,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-13 13:01:55,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-13 13:01:55,652 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:01:55,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:01:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash 698840303, now seen corresponding path program 22 times [2024-11-13 13:01:55,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:01:55,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100914606] [2024-11-13 13:01:55,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:01:55,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:01:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:02:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:00,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:02:00,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100914606] [2024-11-13 13:02:00,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100914606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:02:00,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397721602] [2024-11-13 13:02:00,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 13:02:00,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:02:00,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:02:00,061 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:02:00,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-13 13:02:00,518 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 13:02:00,518 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:02:00,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-13 13:02:00,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:02:00,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:02:00,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 141 [2024-11-13 13:02:01,426 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:02:01,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:02:02,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:02:02,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2024-11-13 13:02:02,588 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:02:02,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397721602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:02:02,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:02:02,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 7, 7] total 31 [2024-11-13 13:02:02,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344038380] [2024-11-13 13:02:02,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:02:02,589 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-13 13:02:02,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:02:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-13 13:02:02,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2024-11-13 13:02:02,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 13:02:02,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 875 transitions, 20515 flow. Second operand has 31 states, 31 states have (on average 5.419354838709677) internal successors, (168), 31 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:02,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:02:02,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 13:02:02,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:02:13,502 INFO L124 PetriNetUnfolderBase]: 9605/17325 cut-off events. [2024-11-13 13:02:13,503 INFO L125 PetriNetUnfolderBase]: For 321031/321031 co-relation queries the response was YES. [2024-11-13 13:02:13,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114682 conditions, 17325 events. 9605/17325 cut-off events. For 321031/321031 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 139759 event pairs, 2960 based on Foata normal form. 24/17331 useless extension candidates. Maximal degree in co-relation 114602. Up to 7619 conditions per place. [2024-11-13 13:02:13,931 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 347 selfloop transitions, 560 changer transitions 8/916 dead transitions. [2024-11-13 13:02:13,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 916 transitions, 22482 flow [2024-11-13 13:02:13,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-13 13:02:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-13 13:02:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 189 transitions. [2024-11-13 13:02:13,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24168797953964194 [2024-11-13 13:02:13,933 INFO L175 Difference]: Start difference. First operand has 401 places, 875 transitions, 20515 flow. Second operand 23 states and 189 transitions. [2024-11-13 13:02:13,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 916 transitions, 22482 flow [2024-11-13 13:02:17,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 916 transitions, 21081 flow, removed 23 selfloop flow, removed 22 redundant places. [2024-11-13 13:02:17,395 INFO L231 Difference]: Finished difference. Result has 399 places, 860 transitions, 19950 flow [2024-11-13 13:02:17,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=18871, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=560, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=19950, PETRI_PLACES=399, PETRI_TRANSITIONS=860} [2024-11-13 13:02:17,396 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 369 predicate places. [2024-11-13 13:02:17,397 INFO L471 AbstractCegarLoop]: Abstraction has has 399 places, 860 transitions, 19950 flow [2024-11-13 13:02:17,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.419354838709677) internal successors, (168), 31 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:17,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:02:17,397 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:02:17,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-13 13:02:17,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:02:17,598 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:02:17,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:02:17,598 INFO L85 PathProgramCache]: Analyzing trace with hash 452392909, now seen corresponding path program 23 times [2024-11-13 13:02:17,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:02:17,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515336863] [2024-11-13 13:02:17,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:02:17,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:02:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:02:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-13 13:02:20,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:02:20,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515336863] [2024-11-13 13:02:20,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515336863] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:02:20,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437563909] [2024-11-13 13:02:20,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-13 13:02:20,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:02:20,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:02:20,593 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:02:20,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-13 13:02:21,244 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-13 13:02:21,244 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:02:21,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-13 13:02:21,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:02:21,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:02:21,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 112 [2024-11-13 13:02:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:02:22,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:02:22,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:02:22,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 194 [2024-11-13 13:02:23,560 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:02:23,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437563909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:02:23,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:02:23,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9, 8] total 33 [2024-11-13 13:02:23,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983873340] [2024-11-13 13:02:23,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:02:23,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 13:02:23,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:02:23,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 13:02:23,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 13:02:23,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 13:02:23,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 860 transitions, 19950 flow. Second operand has 33 states, 33 states have (on average 5.484848484848484) internal successors, (181), 33 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:23,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:02:23,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 13:02:23,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:02:35,400 INFO L124 PetriNetUnfolderBase]: 9731/17487 cut-off events. [2024-11-13 13:02:35,400 INFO L125 PetriNetUnfolderBase]: For 314990/314990 co-relation queries the response was YES. [2024-11-13 13:02:35,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114823 conditions, 17487 events. 9731/17487 cut-off events. For 314990/314990 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 141180 event pairs, 3265 based on Foata normal form. 48/17517 useless extension candidates. Maximal degree in co-relation 114744. Up to 10649 conditions per place. [2024-11-13 13:02:35,688 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 533 selfloop transitions, 517 changer transitions 16/1067 dead transitions. [2024-11-13 13:02:35,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 1067 transitions, 25623 flow [2024-11-13 13:02:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 13:02:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-13 13:02:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 258 transitions. [2024-11-13 13:02:35,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2616632860040568 [2024-11-13 13:02:35,690 INFO L175 Difference]: Start difference. First operand has 399 places, 860 transitions, 19950 flow. Second operand 29 states and 258 transitions. [2024-11-13 13:02:35,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 1067 transitions, 25623 flow [2024-11-13 13:02:39,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1067 transitions, 24948 flow, removed 25 selfloop flow, removed 17 redundant places. [2024-11-13 13:02:39,792 INFO L231 Difference]: Finished difference. Result has 409 places, 921 transitions, 22295 flow [2024-11-13 13:02:39,793 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=19271, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=855, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=447, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=22295, PETRI_PLACES=409, PETRI_TRANSITIONS=921} [2024-11-13 13:02:39,793 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 379 predicate places. [2024-11-13 13:02:39,794 INFO L471 AbstractCegarLoop]: Abstraction has has 409 places, 921 transitions, 22295 flow [2024-11-13 13:02:39,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.484848484848484) internal successors, (181), 33 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:39,794 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:02:39,795 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:02:39,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-13 13:02:39,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:02:39,995 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:02:39,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:02:39,996 INFO L85 PathProgramCache]: Analyzing trace with hash -196001600, now seen corresponding path program 24 times [2024-11-13 13:02:39,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:02:39,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556689399] [2024-11-13 13:02:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:02:39,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:02:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:02:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:02:44,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:02:44,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556689399] [2024-11-13 13:02:44,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556689399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:02:44,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107927496] [2024-11-13 13:02:44,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-13 13:02:44,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:02:44,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:02:44,869 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:02:44,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-13 13:02:45,428 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-13 13:02:45,428 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 13:02:45,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-13 13:02:45,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:02:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:02:46,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:02:47,367 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 13:02:47,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 75 [2024-11-13 13:02:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:02:47,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107927496] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:02:47,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:02:47,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 8] total 36 [2024-11-13 13:02:47,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617670815] [2024-11-13 13:02:47,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:02:47,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-13 13:02:47,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:02:47,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-13 13:02:47,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2024-11-13 13:02:47,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 13:02:47,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 921 transitions, 22295 flow. Second operand has 36 states, 36 states have (on average 5.388888888888889) internal successors, (194), 36 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:02:47,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:02:47,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 13:02:47,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:02:59,949 INFO L124 PetriNetUnfolderBase]: 10058/18012 cut-off events. [2024-11-13 13:02:59,949 INFO L125 PetriNetUnfolderBase]: For 336486/336486 co-relation queries the response was YES. [2024-11-13 13:03:00,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122666 conditions, 18012 events. 10058/18012 cut-off events. For 336486/336486 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 143943 event pairs, 1070 based on Foata normal form. 54/18048 useless extension candidates. Maximal degree in co-relation 122585. Up to 3510 conditions per place. [2024-11-13 13:03:00,224 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 312 selfloop transitions, 777 changer transitions 9/1099 dead transitions. [2024-11-13 13:03:00,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1099 transitions, 27080 flow [2024-11-13 13:03:00,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-13 13:03:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-13 13:03:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 276 transitions. [2024-11-13 13:03:00,225 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.22549019607843138 [2024-11-13 13:03:00,226 INFO L175 Difference]: Start difference. First operand has 409 places, 921 transitions, 22295 flow. Second operand 36 states and 276 transitions. [2024-11-13 13:03:00,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1099 transitions, 27080 flow [2024-11-13 13:03:04,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1099 transitions, 26232 flow, removed 38 selfloop flow, removed 22 redundant places. [2024-11-13 13:03:04,556 INFO L231 Difference]: Finished difference. Result has 419 places, 972 transitions, 24623 flow [2024-11-13 13:03:04,556 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=21586, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=726, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=24623, PETRI_PLACES=419, PETRI_TRANSITIONS=972} [2024-11-13 13:03:04,557 INFO L277 CegarLoopForPetriNet]: 30 programPoint places, 389 predicate places. [2024-11-13 13:03:04,557 INFO L471 AbstractCegarLoop]: Abstraction has has 419 places, 972 transitions, 24623 flow [2024-11-13 13:03:04,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.388888888888889) internal successors, (194), 36 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:03:04,557 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 13:03:04,557 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 13:03:04,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-13 13:03:04,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:03:04,758 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-13 13:03:04,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 13:03:04,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1337328687, now seen corresponding path program 25 times [2024-11-13 13:03:04,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 13:03:04,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513352992] [2024-11-13 13:03:04,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 13:03:04,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 13:03:05,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:03:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 13:03:09,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 13:03:09,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513352992] [2024-11-13 13:03:09,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513352992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 13:03:09,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319626344] [2024-11-13 13:03:09,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-13 13:03:09,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 13:03:09,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 13:03:09,096 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 13:03:09,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0d417ad-674c-4984-b3be-02c5365c4e78/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-13 13:03:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 13:03:09,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 13:03:09,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 13:03:10,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 13:03:10,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 112 [2024-11-13 13:03:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:03:10,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 13:03:11,714 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-11-13 13:03:11,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 177 [2024-11-13 13:03:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-13 13:03:12,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319626344] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 13:03:12,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 13:03:12,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8, 8] total 33 [2024-11-13 13:03:12,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826769247] [2024-11-13 13:03:12,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 13:03:12,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-13 13:03:12,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 13:03:12,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-13 13:03:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2024-11-13 13:03:12,390 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 34 [2024-11-13 13:03:12,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 972 transitions, 24623 flow. Second operand has 33 states, 33 states have (on average 5.2727272727272725) internal successors, (174), 33 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 13:03:12,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 13:03:12,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 34 [2024-11-13 13:03:12,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 13:03:25,029 INFO L124 PetriNetUnfolderBase]: 10280/18426 cut-off events. [2024-11-13 13:03:25,029 INFO L125 PetriNetUnfolderBase]: For 361087/361087 co-relation queries the response was YES. [2024-11-13 13:03:25,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126719 conditions, 18426 events. 10280/18426 cut-off events. For 361087/361087 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 148098 event pairs, 2627 based on Foata normal form. 33/18441 useless extension candidates. Maximal degree in co-relation 126637. Up to 4921 conditions per place. [2024-11-13 13:03:25,352 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 585 selfloop transitions, 525 changer transitions 4/1115 dead transitions. [2024-11-13 13:03:25,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1115 transitions, 28429 flow [2024-11-13 13:03:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-13 13:03:25,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-13 13:03:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 246 transitions. [2024-11-13 13:03:25,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24949290060851928 [2024-11-13 13:03:25,355 INFO L175 Difference]: Start difference. First operand has 419 places, 972 transitions, 24623 flow. Second operand 29 states and 246 transitions. [2024-11-13 13:03:25,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1115 transitions, 28429 flow