./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB --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 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 03:00:07,070 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 03:00:07,174 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 03:00:07,180 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 03:00:07,180 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 03:00:07,218 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 03:00:07,220 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 03:00:07,220 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 03:00:07,221 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 03:00:07,221 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 03:00:07,222 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 03:00:07,223 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 03:00:07,223 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 03:00:07,223 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 03:00:07,223 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 03:00:07,225 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 03:00:07,225 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 03:00:07,225 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 03:00:07,225 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 03:00:07,225 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 03:00:07,225 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 03:00:07,225 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 03:00:07,225 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 03:00:07,225 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 03:00:07,225 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 03:00:07,226 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 03:00:07,226 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 03:00:07,226 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 03:00:07,227 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 03:00:07,227 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:00:07,227 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:00:07,227 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:00:07,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:00:07,227 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 03:00:07,227 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 03:00:07,227 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 03:00:07,227 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 03:00:07,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:00:07,228 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 03:00:07,228 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 03:00:07,228 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 03:00:07,228 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 03:00:07,228 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 03:00:07,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 03:00:07,228 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 03:00:07,228 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 03:00:07,228 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 03:00:07,228 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 03:00:07,228 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_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2024-11-28 03:00:07,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 03:00:07,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 03:00:07,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 03:00:07,666 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 03:00:07,666 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 03:00:07,668 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-28 03:00:11,244 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/data/894313d74/e924f009622d4c8b88820a13865418d2/FLAG14a722ae3 [2024-11-28 03:00:11,651 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 03:00:11,652 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-28 03:00:11,666 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/data/894313d74/e924f009622d4c8b88820a13865418d2/FLAG14a722ae3 [2024-11-28 03:00:11,693 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/data/894313d74/e924f009622d4c8b88820a13865418d2 [2024-11-28 03:00:11,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 03:00:11,698 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 03:00:11,700 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 03:00:11,702 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 03:00:11,708 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 03:00:11,709 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:00:11" (1/1) ... [2024-11-28 03:00:11,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f691684 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:11, skipping insertion in model container [2024-11-28 03:00:11,713 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:00:11" (1/1) ... [2024-11-28 03:00:11,739 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 03:00:12,014 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_2074b0a0-b227-464d-a59f-733b9016557e/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2024-11-28 03:00:12,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:00:12,048 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 03:00:12,088 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_2074b0a0-b227-464d-a59f-733b9016557e/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c[2435,2448] [2024-11-28 03:00:12,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 03:00:12,118 INFO L204 MainTranslator]: Completed translation [2024-11-28 03:00:12,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12 WrapperNode [2024-11-28 03:00:12,120 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 03:00:12,121 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 03:00:12,121 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 03:00:12,121 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 03:00:12,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,152 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,180 INFO L138 Inliner]: procedures = 24, calls = 19, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 86 [2024-11-28 03:00:12,181 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 03:00:12,181 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 03:00:12,181 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 03:00:12,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 03:00:12,193 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,201 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,231 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 03:00:12,232 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,232 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,242 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,251 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,259 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,260 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,264 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,267 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 03:00:12,268 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 03:00:12,268 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 03:00:12,268 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 03:00:12,272 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (1/1) ... [2024-11-28 03:00:12,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 03:00:12,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:12,315 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 03:00:12,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 03:00:12,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 03:00:12,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 03:00:12,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 03:00:12,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 03:00:12,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 03:00:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 03:00:12,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 03:00:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 03:00:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 03:00:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 03:00:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 03:00:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 03:00:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 03:00:12,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 03:00:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 03:00:12,365 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 03:00:12,369 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 03:00:12,507 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 03:00:12,510 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 03:00:12,856 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 03:00:12,856 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 03:00:13,151 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 03:00:13,151 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 03:00:13,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:00:13 BoogieIcfgContainer [2024-11-28 03:00:13,153 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 03:00:13,157 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 03:00:13,157 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 03:00:13,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 03:00:13,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:00:11" (1/3) ... [2024-11-28 03:00:13,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb73df1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:00:13, skipping insertion in model container [2024-11-28 03:00:13,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:00:12" (2/3) ... [2024-11-28 03:00:13,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb73df1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:00:13, skipping insertion in model container [2024-11-28 03:00:13,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:00:13" (3/3) ... [2024-11-28 03:00:13,167 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2024-11-28 03:00:13,186 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 03:00:13,188 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-sum-array-hom.wvr.c that has 4 procedures, 24 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-28 03:00:13,189 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 03:00:13,302 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 03:00:13,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 27 transitions, 75 flow [2024-11-28 03:00:13,398 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-28 03:00:13,402 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:00:13,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 24 events. 4/24 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-11-28 03:00:13,406 INFO L82 GeneralOperation]: Start removeDead. Operand has 33 places, 27 transitions, 75 flow [2024-11-28 03:00:13,410 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 23 transitions, 64 flow [2024-11-28 03:00:13,426 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 03:00:13,447 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;@86b861c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 03:00:13,447 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-11-28 03:00:13,464 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 03:00:13,464 INFO L124 PetriNetUnfolderBase]: 4/22 cut-off events. [2024-11-28 03:00:13,464 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 03:00:13,465 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:13,466 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:13,466 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:13,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:13,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1932174216, now seen corresponding path program 1 times [2024-11-28 03:00:13,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:13,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380674559] [2024-11-28 03:00:13,487 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:00:13,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:14,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:14,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380674559] [2024-11-28 03:00:14,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380674559] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:00:14,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:00:14,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 03:00:14,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563725091] [2024-11-28 03:00:14,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:00:14,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 03:00:14,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:14,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 03:00:14,553 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 03:00:14,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:14,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 64 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) [2024-11-28 03:00:14,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:14,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:14,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:14,825 INFO L124 PetriNetUnfolderBase]: 387/567 cut-off events. [2024-11-28 03:00:14,826 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-28 03:00:14,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 567 events. 387/567 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1792 event pairs, 124 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2024-11-28 03:00:14,835 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 34 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2024-11-28 03:00:14,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 40 transitions, 191 flow [2024-11-28 03:00:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 03:00:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 03:00:14,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 52 transitions. [2024-11-28 03:00:14,853 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-11-28 03:00:14,855 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 64 flow. Second operand 3 states and 52 transitions. [2024-11-28 03:00:14,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 40 transitions, 191 flow [2024-11-28 03:00:14,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 40 transitions, 169 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 03:00:14,871 INFO L231 Difference]: Finished difference. Result has 26 places, 26 transitions, 78 flow [2024-11-28 03:00:14,874 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=26} [2024-11-28 03:00:14,882 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2024-11-28 03:00:14,882 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 26 transitions, 78 flow [2024-11-28 03:00:14,883 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) [2024-11-28 03:00:14,883 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:14,883 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:14,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 03:00:14,886 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:14,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:14,887 INFO L85 PathProgramCache]: Analyzing trace with hash 900276298, now seen corresponding path program 1 times [2024-11-28 03:00:14,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:14,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454478924] [2024-11-28 03:00:14,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:00:14,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:15,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:15,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454478924] [2024-11-28 03:00:15,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454478924] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:00:15,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:00:15,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:00:15,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436436408] [2024-11-28 03:00:15,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:00:15,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:00:15,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:15,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:00:15,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:00:15,255 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:15,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 26 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-28 03:00:15,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:15,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:15,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:15,677 INFO L124 PetriNetUnfolderBase]: 703/1050 cut-off events. [2024-11-28 03:00:15,677 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-11-28 03:00:15,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2519 conditions, 1050 events. 703/1050 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3876 event pairs, 401 based on Foata normal form. 46/1094 useless extension candidates. Maximal degree in co-relation 894. Up to 567 conditions per place. [2024-11-28 03:00:15,695 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 55 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-11-28 03:00:15,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 61 transitions, 298 flow [2024-11-28 03:00:15,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:00:15,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:00:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-11-28 03:00:15,700 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2024-11-28 03:00:15,700 INFO L175 Difference]: Start difference. First operand has 26 places, 26 transitions, 78 flow. Second operand 5 states and 74 transitions. [2024-11-28 03:00:15,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 61 transitions, 298 flow [2024-11-28 03:00:15,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 61 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 03:00:15,703 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 112 flow [2024-11-28 03:00:15,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2024-11-28 03:00:15,706 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2024-11-28 03:00:15,706 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 112 flow [2024-11-28 03:00:15,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-28 03:00:15,707 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:15,708 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:15,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 03:00:15,708 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:15,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1079554071, now seen corresponding path program 1 times [2024-11-28 03:00:15,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:15,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64111838] [2024-11-28 03:00:15,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:00:15,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:15,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:15,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64111838] [2024-11-28 03:00:15,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64111838] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:00:15,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:00:15,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:00:15,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578658855] [2024-11-28 03:00:15,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:00:15,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:00:15,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:15,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:00:15,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:00:15,998 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:15,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-28 03:00:15,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:15,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:15,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:16,361 INFO L124 PetriNetUnfolderBase]: 611/931 cut-off events. [2024-11-28 03:00:16,361 INFO L125 PetriNetUnfolderBase]: For 552/552 co-relation queries the response was YES. [2024-11-28 03:00:16,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 931 events. 611/931 cut-off events. For 552/552 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3425 event pairs, 372 based on Foata normal form. 41/971 useless extension candidates. Maximal degree in co-relation 1457. Up to 567 conditions per place. [2024-11-28 03:00:16,370 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 50 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-11-28 03:00:16,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 56 transitions, 300 flow [2024-11-28 03:00:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:00:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:00:16,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2024-11-28 03:00:16,372 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5259259259259259 [2024-11-28 03:00:16,372 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 112 flow. Second operand 5 states and 71 transitions. [2024-11-28 03:00:16,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 56 transitions, 300 flow [2024-11-28 03:00:16,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 56 transitions, 296 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 03:00:16,378 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 135 flow [2024-11-28 03:00:16,379 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=135, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-11-28 03:00:16,380 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 8 predicate places. [2024-11-28 03:00:16,381 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 135 flow [2024-11-28 03:00:16,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-28 03:00:16,381 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:16,381 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:16,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 03:00:16,382 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:16,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash 491593892, now seen corresponding path program 1 times [2024-11-28 03:00:16,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:16,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90561344] [2024-11-28 03:00:16,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:00:16,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:16,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:16,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:16,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90561344] [2024-11-28 03:00:16,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90561344] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 03:00:16,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 03:00:16,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 03:00:16,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828733897] [2024-11-28 03:00:16,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:00:16,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:00:16,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:16,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:00:16,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 03:00:16,605 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:16,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-28 03:00:16,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:16,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:16,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:16,907 INFO L124 PetriNetUnfolderBase]: 511/784 cut-off events. [2024-11-28 03:00:16,908 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2024-11-28 03:00:16,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2292 conditions, 784 events. 511/784 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2698 event pairs, 333 based on Foata normal form. 22/805 useless extension candidates. Maximal degree in co-relation 1615. Up to 567 conditions per place. [2024-11-28 03:00:16,914 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 24 selfloop transitions, 2 changer transitions 23/50 dead transitions. [2024-11-28 03:00:16,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 293 flow [2024-11-28 03:00:16,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:00:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:00:16,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 67 transitions. [2024-11-28 03:00:16,916 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-11-28 03:00:16,916 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 135 flow. Second operand 5 states and 67 transitions. [2024-11-28 03:00:16,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 293 flow [2024-11-28 03:00:16,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 03:00:16,922 INFO L231 Difference]: Finished difference. Result has 41 places, 27 transitions, 108 flow [2024-11-28 03:00:16,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=41, PETRI_TRANSITIONS=27} [2024-11-28 03:00:16,925 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2024-11-28 03:00:16,925 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 27 transitions, 108 flow [2024-11-28 03:00:16,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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) [2024-11-28 03:00:16,926 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:16,926 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:16,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 03:00:16,926 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:16,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:16,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1200633171, now seen corresponding path program 1 times [2024-11-28 03:00:16,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:16,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363992260] [2024-11-28 03:00:16,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:00:16,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:17,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:17,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363992260] [2024-11-28 03:00:17,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363992260] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:17,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93195268] [2024-11-28 03:00:17,185 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:00:17,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:17,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:17,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:17,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 03:00:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:17,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:00:17,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:17,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:17,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93195268] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:17,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:00:17,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2024-11-28 03:00:17,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304969553] [2024-11-28 03:00:17,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:00:17,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:00:17,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:17,675 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:00:17,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:00:17,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:17,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 27 transitions, 108 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-11-28 03:00:17,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:17,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:17,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:18,070 INFO L124 PetriNetUnfolderBase]: 517/764 cut-off events. [2024-11-28 03:00:18,071 INFO L125 PetriNetUnfolderBase]: For 723/723 co-relation queries the response was YES. [2024-11-28 03:00:18,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2340 conditions, 764 events. 517/764 cut-off events. For 723/723 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2649 event pairs, 150 based on Foata normal form. 14/777 useless extension candidates. Maximal degree in co-relation 2321. Up to 379 conditions per place. [2024-11-28 03:00:18,080 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 55 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-11-28 03:00:18,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 390 flow [2024-11-28 03:00:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:00:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:00:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2024-11-28 03:00:18,082 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-11-28 03:00:18,082 INFO L175 Difference]: Start difference. First operand has 41 places, 27 transitions, 108 flow. Second operand 7 states and 84 transitions. [2024-11-28 03:00:18,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 390 flow [2024-11-28 03:00:18,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 65 transitions, 322 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-11-28 03:00:18,094 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 139 flow [2024-11-28 03:00:18,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=139, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2024-11-28 03:00:18,095 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2024-11-28 03:00:18,095 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 139 flow [2024-11-28 03:00:18,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-11-28 03:00:18,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:18,095 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:18,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 03:00:18,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:18,296 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:18,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:18,297 INFO L85 PathProgramCache]: Analyzing trace with hash -535459175, now seen corresponding path program 2 times [2024-11-28 03:00:18,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:18,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614941761] [2024-11-28 03:00:18,298 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:00:18,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:18,328 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:00:18,328 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:18,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:18,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614941761] [2024-11-28 03:00:18,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614941761] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:18,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813484757] [2024-11-28 03:00:18,562 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:00:18,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:18,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:18,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 03:00:18,700 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:00:18,701 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:18,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:00:18,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:18,844 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:18,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813484757] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:18,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:00:18,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-28 03:00:19,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30378913] [2024-11-28 03:00:19,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:00:19,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:00:19,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:19,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:00:19,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:00:19,001 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:19,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 139 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-11-28 03:00:19,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:19,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:19,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:19,349 INFO L124 PetriNetUnfolderBase]: 678/1005 cut-off events. [2024-11-28 03:00:19,349 INFO L125 PetriNetUnfolderBase]: For 954/954 co-relation queries the response was YES. [2024-11-28 03:00:19,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3045 conditions, 1005 events. 678/1005 cut-off events. For 954/954 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3649 event pairs, 240 based on Foata normal form. 12/1016 useless extension candidates. Maximal degree in co-relation 3023. Up to 593 conditions per place. [2024-11-28 03:00:19,361 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 57 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-11-28 03:00:19,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 70 transitions, 435 flow [2024-11-28 03:00:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:00:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:00:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-11-28 03:00:19,364 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-11-28 03:00:19,365 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 139 flow. Second operand 7 states and 80 transitions. [2024-11-28 03:00:19,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 70 transitions, 435 flow [2024-11-28 03:00:19,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 70 transitions, 400 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-11-28 03:00:19,375 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 196 flow [2024-11-28 03:00:19,375 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=196, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-28 03:00:19,378 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 13 predicate places. [2024-11-28 03:00:19,378 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 196 flow [2024-11-28 03:00:19,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-11-28 03:00:19,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:19,379 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:19,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 03:00:19,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:19,580 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:19,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:19,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1643404945, now seen corresponding path program 3 times [2024-11-28 03:00:19,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:19,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471453290] [2024-11-28 03:00:19,580 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:00:19,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:19,603 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:00:19,603 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:19,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:19,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471453290] [2024-11-28 03:00:19,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471453290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:19,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872588836] [2024-11-28 03:00:19,763 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:00:19,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:19,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:19,766 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:19,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 03:00:19,880 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:00:19,880 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:19,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:00:19,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:20,049 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:20,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872588836] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:20,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:00:20,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-11-28 03:00:20,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811074957] [2024-11-28 03:00:20,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:00:20,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:00:20,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:20,177 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:00:20,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:00:20,179 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:20,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-11-28 03:00:20,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:20,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:20,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:20,568 INFO L124 PetriNetUnfolderBase]: 784/1167 cut-off events. [2024-11-28 03:00:20,569 INFO L125 PetriNetUnfolderBase]: For 1992/1992 co-relation queries the response was YES. [2024-11-28 03:00:20,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4073 conditions, 1167 events. 784/1167 cut-off events. For 1992/1992 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4406 event pairs, 319 based on Foata normal form. 14/1180 useless extension candidates. Maximal degree in co-relation 4048. Up to 820 conditions per place. [2024-11-28 03:00:20,579 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 56 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-11-28 03:00:20,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 74 transitions, 519 flow [2024-11-28 03:00:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:00:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:00:20,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-11-28 03:00:20,585 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-11-28 03:00:20,585 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 196 flow. Second operand 7 states and 82 transitions. [2024-11-28 03:00:20,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 74 transitions, 519 flow [2024-11-28 03:00:20,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 74 transitions, 478 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-11-28 03:00:20,597 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 293 flow [2024-11-28 03:00:20,598 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=293, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2024-11-28 03:00:20,601 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 19 predicate places. [2024-11-28 03:00:20,601 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 293 flow [2024-11-28 03:00:20,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-11-28 03:00:20,601 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:20,601 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:20,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 03:00:20,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:20,806 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:20,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:20,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1843607445, now seen corresponding path program 4 times [2024-11-28 03:00:20,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:20,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812425555] [2024-11-28 03:00:20,807 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:00:20,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:20,822 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:00:20,822 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:20,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812425555] [2024-11-28 03:00:20,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812425555] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:20,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127949291] [2024-11-28 03:00:20,912 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:00:20,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:20,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:20,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:20,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 03:00:21,009 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:00:21,010 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:21,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:00:21,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:21,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:21,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127949291] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:00:21,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:00:21,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-28 03:00:21,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687406469] [2024-11-28 03:00:21,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:00:21,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 03:00:21,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:21,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 03:00:21,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-28 03:00:21,191 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:21,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 293 flow. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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) [2024-11-28 03:00:21,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:21,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:21,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:22,056 INFO L124 PetriNetUnfolderBase]: 1176/1759 cut-off events. [2024-11-28 03:00:22,057 INFO L125 PetriNetUnfolderBase]: For 5262/5262 co-relation queries the response was YES. [2024-11-28 03:00:22,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6733 conditions, 1759 events. 1176/1759 cut-off events. For 5262/5262 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7613 event pairs, 250 based on Foata normal form. 6/1764 useless extension candidates. Maximal degree in co-relation 6705. Up to 615 conditions per place. [2024-11-28 03:00:22,072 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 156 selfloop transitions, 47 changer transitions 0/204 dead transitions. [2024-11-28 03:00:22,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 204 transitions, 1745 flow [2024-11-28 03:00:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 03:00:22,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-28 03:00:22,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 199 transitions. [2024-11-28 03:00:22,075 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4335511982570806 [2024-11-28 03:00:22,076 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 293 flow. Second operand 17 states and 199 transitions. [2024-11-28 03:00:22,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 204 transitions, 1745 flow [2024-11-28 03:00:22,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 204 transitions, 1587 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-11-28 03:00:22,094 INFO L231 Difference]: Finished difference. Result has 73 places, 92 transitions, 870 flow [2024-11-28 03:00:22,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=870, PETRI_PLACES=73, PETRI_TRANSITIONS=92} [2024-11-28 03:00:22,096 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 44 predicate places. [2024-11-28 03:00:22,097 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 92 transitions, 870 flow [2024-11-28 03:00:22,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 12 states have internal predecessors, (76), 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) [2024-11-28 03:00:22,097 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:22,097 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:22,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 03:00:22,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 03:00:22,304 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:22,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:22,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2074330033, now seen corresponding path program 1 times [2024-11-28 03:00:22,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:22,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345623023] [2024-11-28 03:00:22,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:00:22,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:22,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:22,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:22,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345623023] [2024-11-28 03:00:22,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345623023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:22,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15800596] [2024-11-28 03:00:22,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:00:22,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:22,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:22,513 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:22,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 03:00:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:22,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:00:22,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:22,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:22,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:22,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15800596] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:22,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:00:22,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-28 03:00:22,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537160871] [2024-11-28 03:00:22,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:00:22,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 03:00:22,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:22,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 03:00:22,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-28 03:00:22,763 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:22,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 92 transitions, 870 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2024-11-28 03:00:22,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:22,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:22,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:23,135 INFO L124 PetriNetUnfolderBase]: 934/1388 cut-off events. [2024-11-28 03:00:23,135 INFO L125 PetriNetUnfolderBase]: For 9031/9031 co-relation queries the response was YES. [2024-11-28 03:00:23,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6771 conditions, 1388 events. 934/1388 cut-off events. For 9031/9031 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5570 event pairs, 366 based on Foata normal form. 74/1461 useless extension candidates. Maximal degree in co-relation 6732. Up to 1134 conditions per place. [2024-11-28 03:00:23,152 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 110 selfloop transitions, 5 changer transitions 0/116 dead transitions. [2024-11-28 03:00:23,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 116 transitions, 1305 flow [2024-11-28 03:00:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 03:00:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-28 03:00:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 56 transitions. [2024-11-28 03:00:23,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2024-11-28 03:00:23,155 INFO L175 Difference]: Start difference. First operand has 73 places, 92 transitions, 870 flow. Second operand 5 states and 56 transitions. [2024-11-28 03:00:23,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 116 transitions, 1305 flow [2024-11-28 03:00:23,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 1245 flow, removed 30 selfloop flow, removed 0 redundant places. [2024-11-28 03:00:23,183 INFO L231 Difference]: Finished difference. Result has 77 places, 91 transitions, 815 flow [2024-11-28 03:00:23,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=815, PETRI_PLACES=77, PETRI_TRANSITIONS=91} [2024-11-28 03:00:23,184 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-11-28 03:00:23,184 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 91 transitions, 815 flow [2024-11-28 03:00:23,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2024-11-28 03:00:23,185 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:23,185 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:23,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 03:00:23,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 03:00:23,389 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:23,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:23,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1204117753, now seen corresponding path program 5 times [2024-11-28 03:00:23,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:23,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310658841] [2024-11-28 03:00:23,390 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:00:23,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:23,409 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:00:23,409 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:23,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:23,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310658841] [2024-11-28 03:00:23,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310658841] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:23,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667453086] [2024-11-28 03:00:23,544 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:00:23,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:23,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:23,547 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:23,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 03:00:23,657 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:00:23,657 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:23,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 03:00:23,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:23,791 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:23,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667453086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:00:23,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:00:23,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-28 03:00:23,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782989629] [2024-11-28 03:00:23,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:00:23,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:00:23,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:23,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:00:23,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:00:23,924 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:23,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 91 transitions, 815 flow. Second operand has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:00:23,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:23,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:23,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:25,048 INFO L124 PetriNetUnfolderBase]: 1168/1756 cut-off events. [2024-11-28 03:00:25,048 INFO L125 PetriNetUnfolderBase]: For 12421/12421 co-relation queries the response was YES. [2024-11-28 03:00:25,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8657 conditions, 1756 events. 1168/1756 cut-off events. For 12421/12421 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7410 event pairs, 237 based on Foata normal form. 14/1769 useless extension candidates. Maximal degree in co-relation 8615. Up to 754 conditions per place. [2024-11-28 03:00:25,068 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 115 selfloop transitions, 122 changer transitions 0/238 dead transitions. [2024-11-28 03:00:25,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 238 transitions, 2407 flow [2024-11-28 03:00:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:00:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:00:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 196 transitions. [2024-11-28 03:00:25,070 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40329218106995884 [2024-11-28 03:00:25,071 INFO L175 Difference]: Start difference. First operand has 77 places, 91 transitions, 815 flow. Second operand 18 states and 196 transitions. [2024-11-28 03:00:25,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 238 transitions, 2407 flow [2024-11-28 03:00:25,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 238 transitions, 2357 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 03:00:25,104 INFO L231 Difference]: Finished difference. Result has 94 places, 156 transitions, 1885 flow [2024-11-28 03:00:25,104 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1885, PETRI_PLACES=94, PETRI_TRANSITIONS=156} [2024-11-28 03:00:25,105 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 65 predicate places. [2024-11-28 03:00:25,105 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 156 transitions, 1885 flow [2024-11-28 03:00:25,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.625) internal successors, (106), 16 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:00:25,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:25,106 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:25,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 03:00:25,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 03:00:25,307 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:25,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:25,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2048539087, now seen corresponding path program 6 times [2024-11-28 03:00:25,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:25,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317238308] [2024-11-28 03:00:25,307 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:00:25,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:25,326 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:00:25,327 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:25,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:25,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317238308] [2024-11-28 03:00:25,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317238308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:25,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310403176] [2024-11-28 03:00:25,516 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:00:25,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:25,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:25,524 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:25,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 03:00:25,637 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:00:25,637 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:25,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:00:25,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:25,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:25,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310403176] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:25,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:00:25,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-28 03:00:25,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320410171] [2024-11-28 03:00:25,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:00:25,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:00:25,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:25,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:00:25,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:00:25,886 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:25,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 156 transitions, 1885 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-11-28 03:00:25,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:25,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:25,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:26,453 INFO L124 PetriNetUnfolderBase]: 1144/1696 cut-off events. [2024-11-28 03:00:26,454 INFO L125 PetriNetUnfolderBase]: For 14208/14208 co-relation queries the response was YES. [2024-11-28 03:00:26,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9550 conditions, 1696 events. 1144/1696 cut-off events. For 14208/14208 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7023 event pairs, 332 based on Foata normal form. 20/1716 useless extension candidates. Maximal degree in co-relation 9503. Up to 1282 conditions per place. [2024-11-28 03:00:26,490 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 130 selfloop transitions, 66 changer transitions 0/197 dead transitions. [2024-11-28 03:00:26,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 197 transitions, 2578 flow [2024-11-28 03:00:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:00:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:00:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-11-28 03:00:26,493 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-28 03:00:26,493 INFO L175 Difference]: Start difference. First operand has 94 places, 156 transitions, 1885 flow. Second operand 8 states and 90 transitions. [2024-11-28 03:00:26,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 197 transitions, 2578 flow [2024-11-28 03:00:26,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 197 transitions, 2149 flow, removed 148 selfloop flow, removed 7 redundant places. [2024-11-28 03:00:26,604 INFO L231 Difference]: Finished difference. Result has 95 places, 162 transitions, 1705 flow [2024-11-28 03:00:26,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1705, PETRI_PLACES=95, PETRI_TRANSITIONS=162} [2024-11-28 03:00:26,606 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2024-11-28 03:00:26,606 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 162 transitions, 1705 flow [2024-11-28 03:00:26,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-11-28 03:00:26,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:26,608 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:26,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 03:00:26,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:26,809 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:26,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:26,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1231065147, now seen corresponding path program 7 times [2024-11-28 03:00:26,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:26,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85555810] [2024-11-28 03:00:26,810 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:00:26,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:26,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:26,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85555810] [2024-11-28 03:00:26,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85555810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:26,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705328005] [2024-11-28 03:00:26,999 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:00:26,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:27,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:27,002 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:27,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 03:00:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:27,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:00:27,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:27,224 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:27,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705328005] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:27,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-28 03:00:27,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-28 03:00:27,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050853645] [2024-11-28 03:00:27,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 03:00:27,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 03:00:27,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:27,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 03:00:27,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:00:27,368 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:27,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 162 transitions, 1705 flow. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-11-28 03:00:27,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:27,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:27,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:27,830 INFO L124 PetriNetUnfolderBase]: 1120/1636 cut-off events. [2024-11-28 03:00:27,831 INFO L125 PetriNetUnfolderBase]: For 7801/7801 co-relation queries the response was YES. [2024-11-28 03:00:27,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8286 conditions, 1636 events. 1120/1636 cut-off events. For 7801/7801 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6469 event pairs, 256 based on Foata normal form. 20/1656 useless extension candidates. Maximal degree in co-relation 8240. Up to 756 conditions per place. [2024-11-28 03:00:27,901 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 88 selfloop transitions, 90 changer transitions 0/179 dead transitions. [2024-11-28 03:00:27,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 179 transitions, 2100 flow [2024-11-28 03:00:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:00:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:00:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2024-11-28 03:00:27,903 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-11-28 03:00:27,903 INFO L175 Difference]: Start difference. First operand has 95 places, 162 transitions, 1705 flow. Second operand 7 states and 81 transitions. [2024-11-28 03:00:27,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 179 transitions, 2100 flow [2024-11-28 03:00:27,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 179 transitions, 1958 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-11-28 03:00:27,947 INFO L231 Difference]: Finished difference. Result has 91 places, 155 transitions, 1649 flow [2024-11-28 03:00:27,948 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1649, PETRI_PLACES=91, PETRI_TRANSITIONS=155} [2024-11-28 03:00:27,949 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2024-11-28 03:00:27,949 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 155 transitions, 1649 flow [2024-11-28 03:00:27,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 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) [2024-11-28 03:00:27,950 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:27,950 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:27,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 03:00:28,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:28,151 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:28,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:28,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1745369133, now seen corresponding path program 1 times [2024-11-28 03:00:28,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:28,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557646625] [2024-11-28 03:00:28,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:00:28,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:29,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:29,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557646625] [2024-11-28 03:00:29,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557646625] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:29,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507270841] [2024-11-28 03:00:29,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:00:29,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:29,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:29,212 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:29,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 03:00:29,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:29,335 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:00:29,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:29,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:00:29,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:00:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:29,901 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:30,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-28 03:00:30,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:00:30,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 94 treesize of output 86 [2024-11-28 03:00:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:32,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507270841] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:00:32,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:00:32,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-28 03:00:32,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214037480] [2024-11-28 03:00:32,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:00:32,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:00:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:32,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:00:32,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:00:32,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:32,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 155 transitions, 1649 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 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) [2024-11-28 03:00:32,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:32,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:32,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:34,696 INFO L124 PetriNetUnfolderBase]: 1806/2644 cut-off events. [2024-11-28 03:00:34,696 INFO L125 PetriNetUnfolderBase]: For 11721/11721 co-relation queries the response was YES. [2024-11-28 03:00:34,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13473 conditions, 2644 events. 1806/2644 cut-off events. For 11721/11721 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 11821 event pairs, 161 based on Foata normal form. 2/2646 useless extension candidates. Maximal degree in co-relation 12991. Up to 1796 conditions per place. [2024-11-28 03:00:34,722 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 259 selfloop transitions, 128 changer transitions 3/391 dead transitions. [2024-11-28 03:00:34,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 391 transitions, 4716 flow [2024-11-28 03:00:34,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:00:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:00:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 168 transitions. [2024-11-28 03:00:34,726 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-11-28 03:00:34,726 INFO L175 Difference]: Start difference. First operand has 91 places, 155 transitions, 1649 flow. Second operand 12 states and 168 transitions. [2024-11-28 03:00:34,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 391 transitions, 4716 flow [2024-11-28 03:00:34,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 391 transitions, 4300 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-11-28 03:00:34,807 INFO L231 Difference]: Finished difference. Result has 103 places, 261 transitions, 2967 flow [2024-11-28 03:00:34,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2967, PETRI_PLACES=103, PETRI_TRANSITIONS=261} [2024-11-28 03:00:34,809 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 74 predicate places. [2024-11-28 03:00:34,809 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 261 transitions, 2967 flow [2024-11-28 03:00:34,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 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) [2024-11-28 03:00:34,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:34,810 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:34,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 03:00:35,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 03:00:35,015 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:35,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1376276702, now seen corresponding path program 1 times [2024-11-28 03:00:35,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:35,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825110656] [2024-11-28 03:00:35,016 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:00:35,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:35,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:35,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825110656] [2024-11-28 03:00:35,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825110656] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:35,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132933916] [2024-11-28 03:00:35,867 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:00:35,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:35,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:35,870 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:35,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 03:00:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:00:35,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:00:35,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:36,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:00:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:36,255 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:36,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:00:36,370 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 28 treesize of output 21 [2024-11-28 03:00:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:37,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132933916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:00:37,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:00:37,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 17 [2024-11-28 03:00:37,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449928303] [2024-11-28 03:00:37,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:00:37,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:00:37,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:37,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:00:37,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:00:37,062 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:37,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 261 transitions, 2967 flow. Second operand has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 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) [2024-11-28 03:00:37,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:37,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:37,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:38,123 INFO L124 PetriNetUnfolderBase]: 2340/3406 cut-off events. [2024-11-28 03:00:38,124 INFO L125 PetriNetUnfolderBase]: For 16273/16273 co-relation queries the response was YES. [2024-11-28 03:00:38,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18677 conditions, 3406 events. 2340/3406 cut-off events. For 16273/16273 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 15727 event pairs, 283 based on Foata normal form. 4/3410 useless extension candidates. Maximal degree in co-relation 18358. Up to 2577 conditions per place. [2024-11-28 03:00:38,161 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 267 selfloop transitions, 139 changer transitions 1/408 dead transitions. [2024-11-28 03:00:38,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 408 transitions, 5254 flow [2024-11-28 03:00:38,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:00:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:00:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 114 transitions. [2024-11-28 03:00:38,164 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-11-28 03:00:38,164 INFO L175 Difference]: Start difference. First operand has 103 places, 261 transitions, 2967 flow. Second operand 9 states and 114 transitions. [2024-11-28 03:00:38,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 408 transitions, 5254 flow [2024-11-28 03:00:38,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 408 transitions, 5027 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-11-28 03:00:38,318 INFO L231 Difference]: Finished difference. Result has 113 places, 341 transitions, 4155 flow [2024-11-28 03:00:38,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4155, PETRI_PLACES=113, PETRI_TRANSITIONS=341} [2024-11-28 03:00:38,322 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 84 predicate places. [2024-11-28 03:00:38,322 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 341 transitions, 4155 flow [2024-11-28 03:00:38,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.5) internal successors, (135), 18 states have internal predecessors, (135), 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) [2024-11-28 03:00:38,323 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:38,323 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:38,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 03:00:38,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 03:00:38,528 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:38,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:38,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1423860499, now seen corresponding path program 2 times [2024-11-28 03:00:38,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:38,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049865648] [2024-11-28 03:00:38,529 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:00:38,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:38,578 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:00:38,579 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:39,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:39,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049865648] [2024-11-28 03:00:39,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049865648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:39,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780732641] [2024-11-28 03:00:39,467 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:00:39,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:39,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:39,470 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:39,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 03:00:39,580 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:00:39,580 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:39,582 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:00:39,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:39,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:00:40,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:00:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:40,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:40,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780732641] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:00:40,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:00:40,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-11-28 03:00:40,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510463526] [2024-11-28 03:00:40,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:00:40,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:00:40,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:40,658 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:00:40,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:00:40,659 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:40,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 341 transitions, 4155 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-28 03:00:40,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:40,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:40,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:43,257 INFO L124 PetriNetUnfolderBase]: 2617/3816 cut-off events. [2024-11-28 03:00:43,257 INFO L125 PetriNetUnfolderBase]: For 20849/20849 co-relation queries the response was YES. [2024-11-28 03:00:43,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22468 conditions, 3816 events. 2617/3816 cut-off events. For 20849/20849 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18193 event pairs, 267 based on Foata normal form. 2/3818 useless extension candidates. Maximal degree in co-relation 22161. Up to 3116 conditions per place. [2024-11-28 03:00:43,300 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 352 selfloop transitions, 178 changer transitions 2/533 dead transitions. [2024-11-28 03:00:43,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 533 transitions, 6995 flow [2024-11-28 03:00:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 03:00:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-28 03:00:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 262 transitions. [2024-11-28 03:00:43,303 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4219001610305958 [2024-11-28 03:00:43,303 INFO L175 Difference]: Start difference. First operand has 113 places, 341 transitions, 4155 flow. Second operand 23 states and 262 transitions. [2024-11-28 03:00:43,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 533 transitions, 6995 flow [2024-11-28 03:00:43,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 533 transitions, 6872 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-11-28 03:00:43,498 INFO L231 Difference]: Finished difference. Result has 147 places, 425 transitions, 5709 flow [2024-11-28 03:00:43,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5709, PETRI_PLACES=147, PETRI_TRANSITIONS=425} [2024-11-28 03:00:43,499 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 118 predicate places. [2024-11-28 03:00:43,499 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 425 transitions, 5709 flow [2024-11-28 03:00:43,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-28 03:00:43,501 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:43,501 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:43,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 03:00:43,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:43,705 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:43,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:43,705 INFO L85 PathProgramCache]: Analyzing trace with hash 317267006, now seen corresponding path program 2 times [2024-11-28 03:00:43,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:43,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35291176] [2024-11-28 03:00:43,706 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:00:43,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:43,750 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:00:43,751 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:44,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:44,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35291176] [2024-11-28 03:00:44,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35291176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:44,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487046842] [2024-11-28 03:00:44,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:00:44,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:44,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:44,333 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:44,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 03:00:44,434 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:00:44,434 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:44,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 03:00:44,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:44,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:00:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:44,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:44,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:00:44,883 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 24 treesize of output 21 [2024-11-28 03:00:45,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:45,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487046842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:00:45,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:00:45,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-28 03:00:45,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678416562] [2024-11-28 03:00:45,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:00:45,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:00:45,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:45,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:00:45,253 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:00:45,253 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:45,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 425 transitions, 5709 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-28 03:00:45,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:45,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:45,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:46,453 INFO L124 PetriNetUnfolderBase]: 3409/4970 cut-off events. [2024-11-28 03:00:46,453 INFO L125 PetriNetUnfolderBase]: For 32266/32266 co-relation queries the response was YES. [2024-11-28 03:00:46,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31424 conditions, 4970 events. 3409/4970 cut-off events. For 32266/32266 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 24866 event pairs, 197 based on Foata normal form. 4/4974 useless extension candidates. Maximal degree in co-relation 31090. Up to 3108 conditions per place. [2024-11-28 03:00:46,512 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 324 selfloop transitions, 313 changer transitions 1/639 dead transitions. [2024-11-28 03:00:46,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 639 transitions, 9473 flow [2024-11-28 03:00:46,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:00:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:00:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 123 transitions. [2024-11-28 03:00:46,514 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5061728395061729 [2024-11-28 03:00:46,514 INFO L175 Difference]: Start difference. First operand has 147 places, 425 transitions, 5709 flow. Second operand 9 states and 123 transitions. [2024-11-28 03:00:46,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 639 transitions, 9473 flow [2024-11-28 03:00:46,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 639 transitions, 9212 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-11-28 03:00:46,943 INFO L231 Difference]: Finished difference. Result has 152 places, 529 transitions, 7842 flow [2024-11-28 03:00:46,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=5448, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7842, PETRI_PLACES=152, PETRI_TRANSITIONS=529} [2024-11-28 03:00:46,944 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 123 predicate places. [2024-11-28 03:00:46,944 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 529 transitions, 7842 flow [2024-11-28 03:00:46,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-28 03:00:46,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:46,944 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:46,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 03:00:47,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 03:00:47,145 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:47,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash -91333571, now seen corresponding path program 3 times [2024-11-28 03:00:47,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:47,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055542761] [2024-11-28 03:00:47,146 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:00:47,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:47,188 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:00:47,188 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:48,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:48,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055542761] [2024-11-28 03:00:48,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055542761] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:48,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159012389] [2024-11-28 03:00:48,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:00:48,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:48,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:48,058 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:48,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 03:00:48,165 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:00:48,165 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:48,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:00:48,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:48,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:00:48,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:00:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:48,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:49,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159012389] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:00:49,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:00:49,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-11-28 03:00:49,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142951871] [2024-11-28 03:00:49,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:00:49,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:00:49,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:49,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:00:49,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:00:49,138 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:49,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 529 transitions, 7842 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-28 03:00:49,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:49,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:49,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:51,333 INFO L124 PetriNetUnfolderBase]: 3511/5123 cut-off events. [2024-11-28 03:00:51,333 INFO L125 PetriNetUnfolderBase]: For 39707/39707 co-relation queries the response was YES. [2024-11-28 03:00:51,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35138 conditions, 5123 events. 3511/5123 cut-off events. For 39707/39707 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 25846 event pairs, 389 based on Foata normal form. 1/5124 useless extension candidates. Maximal degree in co-relation 34784. Up to 4536 conditions per place. [2024-11-28 03:00:51,402 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 451 selfloop transitions, 185 changer transitions 1/638 dead transitions. [2024-11-28 03:00:51,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 638 transitions, 10072 flow [2024-11-28 03:00:51,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 03:00:51,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-28 03:00:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 259 transitions. [2024-11-28 03:00:51,404 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39969135802469136 [2024-11-28 03:00:51,405 INFO L175 Difference]: Start difference. First operand has 152 places, 529 transitions, 7842 flow. Second operand 24 states and 259 transitions. [2024-11-28 03:00:51,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 638 transitions, 10072 flow [2024-11-28 03:00:51,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 638 transitions, 9661 flow, removed 132 selfloop flow, removed 4 redundant places. [2024-11-28 03:00:51,700 INFO L231 Difference]: Finished difference. Result has 176 places, 561 transitions, 8352 flow [2024-11-28 03:00:51,701 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7448, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8352, PETRI_PLACES=176, PETRI_TRANSITIONS=561} [2024-11-28 03:00:51,701 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 147 predicate places. [2024-11-28 03:00:51,701 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 561 transitions, 8352 flow [2024-11-28 03:00:51,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-28 03:00:51,702 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:51,702 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:51,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 03:00:51,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 03:00:51,902 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:51,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1077402396, now seen corresponding path program 3 times [2024-11-28 03:00:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:51,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432805676] [2024-11-28 03:00:51,903 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:00:51,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:51,923 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:00:51,924 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:52,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:00:52,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:52,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432805676] [2024-11-28 03:00:52,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432805676] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:52,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645765536] [2024-11-28 03:00:52,546 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:00:52,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:52,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:52,549 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:52,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 03:00:52,664 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:00:52,664 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:52,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 03:00:52,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:52,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:00:52,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:52,955 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:53,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:00:53,067 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 28 treesize of output 21 [2024-11-28 03:00:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645765536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:00:53,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:00:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-28 03:00:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083159807] [2024-11-28 03:00:53,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:00:53,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:00:53,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:53,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:00:53,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:00:53,757 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:53,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 561 transitions, 8352 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-28 03:00:53,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:53,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:53,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:55,250 INFO L124 PetriNetUnfolderBase]: 3762/5487 cut-off events. [2024-11-28 03:00:55,250 INFO L125 PetriNetUnfolderBase]: For 41584/41584 co-relation queries the response was YES. [2024-11-28 03:00:55,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37348 conditions, 5487 events. 3762/5487 cut-off events. For 41584/41584 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 28030 event pairs, 428 based on Foata normal form. 4/5491 useless extension candidates. Maximal degree in co-relation 36982. Up to 4835 conditions per place. [2024-11-28 03:00:55,292 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 473 selfloop transitions, 157 changer transitions 1/632 dead transitions. [2024-11-28 03:00:55,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 632 transitions, 10345 flow [2024-11-28 03:00:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:00:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:00:55,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-11-28 03:00:55,293 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4732510288065844 [2024-11-28 03:00:55,294 INFO L175 Difference]: Start difference. First operand has 176 places, 561 transitions, 8352 flow. Second operand 9 states and 115 transitions. [2024-11-28 03:00:55,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 632 transitions, 10345 flow [2024-11-28 03:00:55,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 632 transitions, 10116 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-11-28 03:00:55,642 INFO L231 Difference]: Finished difference. Result has 180 places, 574 transitions, 8685 flow [2024-11-28 03:00:55,642 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8123, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8685, PETRI_PLACES=180, PETRI_TRANSITIONS=574} [2024-11-28 03:00:55,643 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 151 predicate places. [2024-11-28 03:00:55,643 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 574 transitions, 8685 flow [2024-11-28 03:00:55,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-28 03:00:55,643 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:55,643 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:55,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 03:00:55,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 03:00:55,844 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:55,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:55,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1726069988, now seen corresponding path program 4 times [2024-11-28 03:00:55,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:55,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678219630] [2024-11-28 03:00:55,845 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:00:55,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:55,858 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:00:55,858 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:56,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678219630] [2024-11-28 03:00:56,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678219630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:56,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348424687] [2024-11-28 03:00:56,100 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:00:56,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:56,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:56,103 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:56,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 03:00:56,200 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:00:56,200 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:56,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 03:00:56,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:56,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:00:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:56,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:00:56,532 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:00:56,533 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 28 treesize of output 21 [2024-11-28 03:00:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:56,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348424687] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:00:56,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:00:56,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 15 [2024-11-28 03:00:56,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115175831] [2024-11-28 03:00:56,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:00:56,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:00:56,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:00:56,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:00:56,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:00:56,938 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:00:56,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 574 transitions, 8685 flow. Second operand has 16 states, 16 states have (on average 7.9375) internal successors, (127), 16 states have internal predecessors, (127), 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) [2024-11-28 03:00:56,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:00:56,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:00:56,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:00:58,633 INFO L124 PetriNetUnfolderBase]: 3965/5786 cut-off events. [2024-11-28 03:00:58,633 INFO L125 PetriNetUnfolderBase]: For 46259/46259 co-relation queries the response was YES. [2024-11-28 03:00:58,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39979 conditions, 5786 events. 3965/5786 cut-off events. For 46259/46259 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29844 event pairs, 479 based on Foata normal form. 4/5790 useless extension candidates. Maximal degree in co-relation 39604. Up to 4913 conditions per place. [2024-11-28 03:00:58,692 INFO L140 encePairwiseOnDemand]: 19/27 looper letters, 473 selfloop transitions, 191 changer transitions 1/666 dead transitions. [2024-11-28 03:00:58,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 666 transitions, 11037 flow [2024-11-28 03:00:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:00:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:00:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-11-28 03:00:58,693 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-28 03:00:58,693 INFO L175 Difference]: Start difference. First operand has 180 places, 574 transitions, 8685 flow. Second operand 7 states and 108 transitions. [2024-11-28 03:00:58,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 666 transitions, 11037 flow [2024-11-28 03:00:59,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 666 transitions, 10766 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-11-28 03:00:59,203 INFO L231 Difference]: Finished difference. Result has 183 places, 591 transitions, 9177 flow [2024-11-28 03:00:59,204 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8414, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9177, PETRI_PLACES=183, PETRI_TRANSITIONS=591} [2024-11-28 03:00:59,204 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 154 predicate places. [2024-11-28 03:00:59,204 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 591 transitions, 9177 flow [2024-11-28 03:00:59,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.9375) internal successors, (127), 16 states have internal predecessors, (127), 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) [2024-11-28 03:00:59,204 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:00:59,204 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:00:59,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 03:00:59,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:59,405 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:00:59,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:00:59,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1513491251, now seen corresponding path program 4 times [2024-11-28 03:00:59,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:00:59,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676685961] [2024-11-28 03:00:59,406 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:00:59,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:00:59,445 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:00:59,445 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:00:59,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:00:59,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676685961] [2024-11-28 03:00:59,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676685961] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:00:59,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499179905] [2024-11-28 03:00:59,817 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:00:59,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:00:59,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:00:59,819 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:00:59,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 03:00:59,905 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:00:59,905 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:00:59,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-28 03:00:59,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:00:59,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:01:00,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:01:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:00,254 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:01:00,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-28 03:01:00,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:01:00,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 94 treesize of output 86 [2024-11-28 03:01:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:18,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499179905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:01:18,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:01:18,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-28 03:01:18,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903273668] [2024-11-28 03:01:18,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:01:18,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:01:18,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:01:18,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:01:18,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:01:18,533 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:01:18,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 591 transitions, 9177 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 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) [2024-11-28 03:01:18,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:18,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:01:18,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:21,579 INFO L124 PetriNetUnfolderBase]: 4626/6722 cut-off events. [2024-11-28 03:01:21,580 INFO L125 PetriNetUnfolderBase]: For 59370/59370 co-relation queries the response was YES. [2024-11-28 03:01:21,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47041 conditions, 6722 events. 4626/6722 cut-off events. For 59370/59370 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 35183 event pairs, 509 based on Foata normal form. 4/6726 useless extension candidates. Maximal degree in co-relation 46652. Up to 5372 conditions per place. [2024-11-28 03:01:21,660 INFO L140 encePairwiseOnDemand]: 16/27 looper letters, 503 selfloop transitions, 296 changer transitions 5/805 dead transitions. [2024-11-28 03:01:21,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 805 transitions, 13212 flow [2024-11-28 03:01:21,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 03:01:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-28 03:01:21,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 317 transitions. [2024-11-28 03:01:21,662 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4515669515669516 [2024-11-28 03:01:21,662 INFO L175 Difference]: Start difference. First operand has 183 places, 591 transitions, 9177 flow. Second operand 26 states and 317 transitions. [2024-11-28 03:01:21,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 805 transitions, 13212 flow [2024-11-28 03:01:22,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 805 transitions, 12674 flow, removed 96 selfloop flow, removed 4 redundant places. [2024-11-28 03:01:22,426 INFO L231 Difference]: Finished difference. Result has 217 places, 704 transitions, 11168 flow [2024-11-28 03:01:22,426 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8696, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11168, PETRI_PLACES=217, PETRI_TRANSITIONS=704} [2024-11-28 03:01:22,427 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 188 predicate places. [2024-11-28 03:01:22,427 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 704 transitions, 11168 flow [2024-11-28 03:01:22,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 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) [2024-11-28 03:01:22,427 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:22,427 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:22,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 03:01:22,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:22,632 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:01:22,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:22,633 INFO L85 PathProgramCache]: Analyzing trace with hash -424512978, now seen corresponding path program 5 times [2024-11-28 03:01:22,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:01:22,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727177531] [2024-11-28 03:01:22,633 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:01:22,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:01:22,661 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:01:22,664 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:01:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:22,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:01:22,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727177531] [2024-11-28 03:01:22,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727177531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:01:22,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447397049] [2024-11-28 03:01:22,997 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:01:22,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:22,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:23,002 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:23,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 03:01:23,096 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:01:23,096 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:01:23,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 03:01:23,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:23,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:01:23,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:01:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:23,367 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:01:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:23,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447397049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:01:23,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:01:23,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 16 [2024-11-28 03:01:23,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499200588] [2024-11-28 03:01:23,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:01:23,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:01:23,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:01:23,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:01:23,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:01:23,625 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:01:23,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 704 transitions, 11168 flow. Second operand has 17 states, 17 states have (on average 7.705882352941177) internal successors, (131), 17 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:23,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:23,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:01:23,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:25,867 INFO L124 PetriNetUnfolderBase]: 4845/7046 cut-off events. [2024-11-28 03:01:25,867 INFO L125 PetriNetUnfolderBase]: For 71903/71903 co-relation queries the response was YES. [2024-11-28 03:01:25,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51670 conditions, 7046 events. 4845/7046 cut-off events. For 71903/71903 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 37276 event pairs, 614 based on Foata normal form. 4/7050 useless extension candidates. Maximal degree in co-relation 51232. Up to 6418 conditions per place. [2024-11-28 03:01:25,960 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 575 selfloop transitions, 179 changer transitions 1/756 dead transitions. [2024-11-28 03:01:25,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 756 transitions, 13222 flow [2024-11-28 03:01:25,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:01:25,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:01:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 108 transitions. [2024-11-28 03:01:25,961 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-28 03:01:25,961 INFO L175 Difference]: Start difference. First operand has 217 places, 704 transitions, 11168 flow. Second operand 8 states and 108 transitions. [2024-11-28 03:01:25,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 756 transitions, 13222 flow [2024-11-28 03:01:26,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 756 transitions, 12597 flow, removed 309 selfloop flow, removed 3 redundant places. [2024-11-28 03:01:26,903 INFO L231 Difference]: Finished difference. Result has 223 places, 715 transitions, 11179 flow [2024-11-28 03:01:26,904 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10555, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11179, PETRI_PLACES=223, PETRI_TRANSITIONS=715} [2024-11-28 03:01:26,904 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 194 predicate places. [2024-11-28 03:01:26,904 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 715 transitions, 11179 flow [2024-11-28 03:01:26,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.705882352941177) internal successors, (131), 17 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:26,904 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:26,904 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:26,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-28 03:01:27,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:27,109 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:01:27,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:27,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1075853062, now seen corresponding path program 6 times [2024-11-28 03:01:27,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:01:27,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378660463] [2024-11-28 03:01:27,110 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:01:27,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:01:27,131 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:01:27,131 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:01:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:27,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:01:27,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378660463] [2024-11-28 03:01:27,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378660463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:01:27,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854332970] [2024-11-28 03:01:27,738 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:01:27,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:27,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:27,740 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:27,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 03:01:27,876 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:01:27,877 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:01:27,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 03:01:27,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:28,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:01:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:28,194 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:01:28,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:01:28,351 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 24 treesize of output 21 [2024-11-28 03:01:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:28,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854332970] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:01:28,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:01:28,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-28 03:01:28,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8220847] [2024-11-28 03:01:29,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:01:29,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:01:29,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:01:29,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:01:29,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:01:29,001 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:01:29,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 715 transitions, 11179 flow. Second operand has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-28 03:01:29,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:29,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:01:29,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:30,890 INFO L124 PetriNetUnfolderBase]: 5116/7442 cut-off events. [2024-11-28 03:01:30,890 INFO L125 PetriNetUnfolderBase]: For 75345/75345 co-relation queries the response was YES. [2024-11-28 03:01:30,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53368 conditions, 7442 events. 5116/7442 cut-off events. For 75345/75345 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 39785 event pairs, 559 based on Foata normal form. 4/7446 useless extension candidates. Maximal degree in co-relation 52921. Up to 6624 conditions per place. [2024-11-28 03:01:31,026 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 582 selfloop transitions, 190 changer transitions 1/774 dead transitions. [2024-11-28 03:01:31,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 774 transitions, 13369 flow [2024-11-28 03:01:31,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:01:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:01:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-11-28 03:01:31,028 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46502057613168724 [2024-11-28 03:01:31,028 INFO L175 Difference]: Start difference. First operand has 223 places, 715 transitions, 11179 flow. Second operand 9 states and 113 transitions. [2024-11-28 03:01:31,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 774 transitions, 13369 flow [2024-11-28 03:01:31,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 774 transitions, 13111 flow, removed 62 selfloop flow, removed 3 redundant places. [2024-11-28 03:01:31,931 INFO L231 Difference]: Finished difference. Result has 231 places, 732 transitions, 11722 flow [2024-11-28 03:01:31,931 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10921, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11722, PETRI_PLACES=231, PETRI_TRANSITIONS=732} [2024-11-28 03:01:31,932 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 202 predicate places. [2024-11-28 03:01:31,932 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 732 transitions, 11722 flow [2024-11-28 03:01:31,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.315789473684211) internal successors, (139), 19 states have internal predecessors, (139), 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) [2024-11-28 03:01:31,932 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:31,932 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:31,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 03:01:32,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-28 03:01:32,133 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:01:32,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:32,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1651563195, now seen corresponding path program 5 times [2024-11-28 03:01:32,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:01:32,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434550902] [2024-11-28 03:01:32,134 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:01:32,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:01:32,149 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:01:32,149 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:01:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:32,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:01:32,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434550902] [2024-11-28 03:01:32,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434550902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:01:32,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272392327] [2024-11-28 03:01:32,479 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:01:32,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:32,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:32,482 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:32,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 03:01:32,584 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:01:32,585 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:01:32,586 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-28 03:01:32,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:32,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:01:33,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:01:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:33,079 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:01:33,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-28 03:01:33,505 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:01:33,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 94 treesize of output 86 [2024-11-28 03:01:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:34,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272392327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:01:34,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:01:34,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-28 03:01:34,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040054562] [2024-11-28 03:01:34,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:01:34,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 03:01:34,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:01:34,157 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 03:01:34,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-11-28 03:01:34,157 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:01:34,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 732 transitions, 11722 flow. Second operand has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 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) [2024-11-28 03:01:34,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:34,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:01:34,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:36,285 INFO L124 PetriNetUnfolderBase]: 5283/7689 cut-off events. [2024-11-28 03:01:36,285 INFO L125 PetriNetUnfolderBase]: For 81466/81466 co-relation queries the response was YES. [2024-11-28 03:01:36,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55406 conditions, 7689 events. 5283/7689 cut-off events. For 81466/81466 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 41438 event pairs, 740 based on Foata normal form. 2/7691 useless extension candidates. Maximal degree in co-relation 54949. Up to 6892 conditions per place. [2024-11-28 03:01:36,363 INFO L140 encePairwiseOnDemand]: 17/27 looper letters, 608 selfloop transitions, 191 changer transitions 2/802 dead transitions. [2024-11-28 03:01:36,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 802 transitions, 14021 flow [2024-11-28 03:01:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:01:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:01:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 172 transitions. [2024-11-28 03:01:36,364 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-11-28 03:01:36,364 INFO L175 Difference]: Start difference. First operand has 231 places, 732 transitions, 11722 flow. Second operand 14 states and 172 transitions. [2024-11-28 03:01:36,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 802 transitions, 14021 flow [2024-11-28 03:01:37,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 802 transitions, 13645 flow, removed 87 selfloop flow, removed 4 redundant places. [2024-11-28 03:01:37,091 INFO L231 Difference]: Finished difference. Result has 244 places, 755 transitions, 12189 flow [2024-11-28 03:01:37,091 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11346, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=12189, PETRI_PLACES=244, PETRI_TRANSITIONS=755} [2024-11-28 03:01:37,092 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 215 predicate places. [2024-11-28 03:01:37,092 INFO L471 AbstractCegarLoop]: Abstraction has has 244 places, 755 transitions, 12189 flow [2024-11-28 03:01:37,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.739130434782608) internal successors, (155), 23 states have internal predecessors, (155), 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) [2024-11-28 03:01:37,093 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:37,093 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:37,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 03:01:37,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 03:01:37,297 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:01:37,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:37,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1543743351, now seen corresponding path program 6 times [2024-11-28 03:01:37,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:01:37,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727770527] [2024-11-28 03:01:37,297 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:01:37,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:01:37,313 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:01:37,314 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:01:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:37,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:01:37,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727770527] [2024-11-28 03:01:37,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727770527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:01:37,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904967393] [2024-11-28 03:01:37,911 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:01:37,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:37,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:37,913 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:37,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 03:01:38,019 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:01:38,019 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:01:38,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 03:01:38,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:38,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:01:38,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-28 03:01:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:01:38,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:01:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:38,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904967393] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:01:38,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:01:38,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 24 [2024-11-28 03:01:38,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310433538] [2024-11-28 03:01:38,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:01:38,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 03:01:38,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:01:38,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 03:01:38,839 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2024-11-28 03:01:38,839 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:01:38,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 755 transitions, 12189 flow. Second operand has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-28 03:01:38,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:38,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:01:38,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:41,961 INFO L124 PetriNetUnfolderBase]: 5520/8024 cut-off events. [2024-11-28 03:01:41,962 INFO L125 PetriNetUnfolderBase]: For 83462/83462 co-relation queries the response was YES. [2024-11-28 03:01:42,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58186 conditions, 8024 events. 5520/8024 cut-off events. For 83462/83462 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 43243 event pairs, 682 based on Foata normal form. 1/8025 useless extension candidates. Maximal degree in co-relation 57712. Up to 7272 conditions per place. [2024-11-28 03:01:42,093 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 616 selfloop transitions, 232 changer transitions 2/851 dead transitions. [2024-11-28 03:01:42,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 851 transitions, 14724 flow [2024-11-28 03:01:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 03:01:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-28 03:01:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 318 transitions. [2024-11-28 03:01:42,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-11-28 03:01:42,096 INFO L175 Difference]: Start difference. First operand has 244 places, 755 transitions, 12189 flow. Second operand 30 states and 318 transitions. [2024-11-28 03:01:42,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 851 transitions, 14724 flow [2024-11-28 03:01:43,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 851 transitions, 14397 flow, removed 112 selfloop flow, removed 4 redundant places. [2024-11-28 03:01:43,159 INFO L231 Difference]: Finished difference. Result has 275 places, 775 transitions, 12753 flow [2024-11-28 03:01:43,160 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11919, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=12753, PETRI_PLACES=275, PETRI_TRANSITIONS=775} [2024-11-28 03:01:43,160 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 246 predicate places. [2024-11-28 03:01:43,160 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 775 transitions, 12753 flow [2024-11-28 03:01:43,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.52) internal successors, (163), 25 states have internal predecessors, (163), 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) [2024-11-28 03:01:43,160 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:43,160 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:43,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 03:01:43,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 03:01:43,361 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:01:43,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:43,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1135025986, now seen corresponding path program 7 times [2024-11-28 03:01:43,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:01:43,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056062189] [2024-11-28 03:01:43,362 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:01:43,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:01:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:43,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:01:43,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056062189] [2024-11-28 03:01:43,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056062189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:01:43,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175187745] [2024-11-28 03:01:43,485 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:01:43,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:43,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:43,489 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:43,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 03:01:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:43,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:01:43,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:43,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:01:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:43,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175187745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:01:43,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:01:43,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-28 03:01:43,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267991873] [2024-11-28 03:01:43,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:01:43,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:01:43,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:01:43,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:01:43,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:01:43,801 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:01:43,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 775 transitions, 12753 flow. Second operand has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:43,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:43,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:01:43,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:46,272 INFO L124 PetriNetUnfolderBase]: 6884/9935 cut-off events. [2024-11-28 03:01:46,272 INFO L125 PetriNetUnfolderBase]: For 125474/125474 co-relation queries the response was YES. [2024-11-28 03:01:46,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72598 conditions, 9935 events. 6884/9935 cut-off events. For 125474/125474 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 54585 event pairs, 1849 based on Foata normal form. 362/10297 useless extension candidates. Maximal degree in co-relation 72242. Up to 6572 conditions per place. [2024-11-28 03:01:46,485 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 917 selfloop transitions, 67 changer transitions 0/985 dead transitions. [2024-11-28 03:01:46,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 985 transitions, 17461 flow [2024-11-28 03:01:46,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 03:01:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-28 03:01:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 101 transitions. [2024-11-28 03:01:46,487 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4675925925925926 [2024-11-28 03:01:46,487 INFO L175 Difference]: Start difference. First operand has 275 places, 775 transitions, 12753 flow. Second operand 8 states and 101 transitions. [2024-11-28 03:01:46,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 985 transitions, 17461 flow [2024-11-28 03:01:48,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 985 transitions, 17054 flow, removed 97 selfloop flow, removed 14 redundant places. [2024-11-28 03:01:48,048 INFO L231 Difference]: Finished difference. Result has 269 places, 751 transitions, 12261 flow [2024-11-28 03:01:48,049 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11708, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12261, PETRI_PLACES=269, PETRI_TRANSITIONS=751} [2024-11-28 03:01:48,050 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 240 predicate places. [2024-11-28 03:01:48,050 INFO L471 AbstractCegarLoop]: Abstraction has has 269 places, 751 transitions, 12261 flow [2024-11-28 03:01:48,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.066666666666666) internal successors, (106), 15 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:01:48,050 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:48,050 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:48,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 03:01:48,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 03:01:48,255 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:01:48,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:48,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2103439519, now seen corresponding path program 8 times [2024-11-28 03:01:48,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:01:48,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719382730] [2024-11-28 03:01:48,256 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:01:48,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:01:48,274 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:01:48,274 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:01:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:48,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:01:48,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719382730] [2024-11-28 03:01:48,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719382730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:01:48,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971503132] [2024-11-28 03:01:48,392 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:01:48,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:48,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:48,395 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:48,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 03:01:48,498 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:01:48,498 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:01:48,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:01:48,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:48,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:01:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:48,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971503132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:01:48,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:01:48,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 03:01:48,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734337895] [2024-11-28 03:01:48,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:01:48,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:01:48,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:01:48,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:01:48,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:01:48,708 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:01:48,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 751 transitions, 12261 flow. Second operand has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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) [2024-11-28 03:01:48,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:48,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:01:48,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:51,513 INFO L124 PetriNetUnfolderBase]: 5980/8841 cut-off events. [2024-11-28 03:01:51,513 INFO L125 PetriNetUnfolderBase]: For 123370/123370 co-relation queries the response was YES. [2024-11-28 03:01:51,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65756 conditions, 8841 events. 5980/8841 cut-off events. For 123370/123370 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 50341 event pairs, 1443 based on Foata normal form. 498/9339 useless extension candidates. Maximal degree in co-relation 65171. Up to 3351 conditions per place. [2024-11-28 03:01:51,921 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 859 selfloop transitions, 72 changer transitions 0/932 dead transitions. [2024-11-28 03:01:51,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 932 transitions, 16437 flow [2024-11-28 03:01:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:01:51,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:01:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 95 transitions. [2024-11-28 03:01:51,922 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-11-28 03:01:51,922 INFO L175 Difference]: Start difference. First operand has 269 places, 751 transitions, 12261 flow. Second operand 7 states and 95 transitions. [2024-11-28 03:01:51,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 932 transitions, 16437 flow [2024-11-28 03:01:53,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 932 transitions, 16358 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-11-28 03:01:53,105 INFO L231 Difference]: Finished difference. Result has 271 places, 721 transitions, 12085 flow [2024-11-28 03:01:53,106 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11716, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12085, PETRI_PLACES=271, PETRI_TRANSITIONS=721} [2024-11-28 03:01:53,106 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 242 predicate places. [2024-11-28 03:01:53,106 INFO L471 AbstractCegarLoop]: Abstraction has has 271 places, 721 transitions, 12085 flow [2024-11-28 03:01:53,107 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.928571428571429) internal successors, (97), 14 states have internal predecessors, (97), 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) [2024-11-28 03:01:53,107 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:53,107 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:53,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 03:01:53,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 03:01:53,311 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:01:53,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:53,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1537999053, now seen corresponding path program 7 times [2024-11-28 03:01:53,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:01:53,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010097750] [2024-11-28 03:01:53,311 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:01:53,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:01:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:53,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:01:53,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010097750] [2024-11-28 03:01:53,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010097750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:01:53,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682516990] [2024-11-28 03:01:53,450 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:01:53,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:53,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:53,452 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:53,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 03:01:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:53,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:01:53,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:53,684 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:01:53,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:53,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682516990] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:01:53,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:01:53,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-28 03:01:53,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537664707] [2024-11-28 03:01:53,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:01:53,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:01:53,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:01:53,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:01:53,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:01:53,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:01:53,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 721 transitions, 12085 flow. Second operand has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 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) [2024-11-28 03:01:53,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:53,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:01:53,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:01:56,268 INFO L124 PetriNetUnfolderBase]: 5359/8061 cut-off events. [2024-11-28 03:01:56,268 INFO L125 PetriNetUnfolderBase]: For 110414/110414 co-relation queries the response was YES. [2024-11-28 03:01:56,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61552 conditions, 8061 events. 5359/8061 cut-off events. For 110414/110414 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 46861 event pairs, 1389 based on Foata normal form. 300/8361 useless extension candidates. Maximal degree in co-relation 61035. Up to 3351 conditions per place. [2024-11-28 03:01:56,427 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 746 selfloop transitions, 105 changer transitions 84/936 dead transitions. [2024-11-28 03:01:56,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 936 transitions, 16664 flow [2024-11-28 03:01:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:01:56,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:01:56,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 94 transitions. [2024-11-28 03:01:56,428 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-11-28 03:01:56,429 INFO L175 Difference]: Start difference. First operand has 271 places, 721 transitions, 12085 flow. Second operand 7 states and 94 transitions. [2024-11-28 03:01:56,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 936 transitions, 16664 flow [2024-11-28 03:01:57,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 936 transitions, 16455 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-11-28 03:01:57,926 INFO L231 Difference]: Finished difference. Result has 274 places, 675 transitions, 11620 flow [2024-11-28 03:01:57,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11898, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11620, PETRI_PLACES=274, PETRI_TRANSITIONS=675} [2024-11-28 03:01:57,928 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 245 predicate places. [2024-11-28 03:01:57,928 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 675 transitions, 11620 flow [2024-11-28 03:01:57,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.533333333333333) internal successors, (98), 15 states have internal predecessors, (98), 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) [2024-11-28 03:01:57,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:01:57,928 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:01:57,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 03:01:58,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 03:01:58,129 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:01:58,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:01:58,130 INFO L85 PathProgramCache]: Analyzing trace with hash 723300132, now seen corresponding path program 1 times [2024-11-28 03:01:58,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:01:58,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247053206] [2024-11-28 03:01:58,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:01:58,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:01:58,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:58,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:01:58,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247053206] [2024-11-28 03:01:58,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247053206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:01:58,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309305810] [2024-11-28 03:01:58,297 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 03:01:58,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:01:58,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:01:58,300 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:01:58,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 03:01:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:01:58,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:01:58,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:01:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:58,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:01:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:01:58,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309305810] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:01:58,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:01:58,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-28 03:01:58,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613195165] [2024-11-28 03:01:58,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:01:58,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:01:58,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:01:58,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:01:58,604 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:01:58,604 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:01:58,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 675 transitions, 11620 flow. Second operand has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 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) [2024-11-28 03:01:58,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:01:58,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:01:58,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:00,675 INFO L124 PetriNetUnfolderBase]: 5155/7707 cut-off events. [2024-11-28 03:02:00,675 INFO L125 PetriNetUnfolderBase]: For 112936/112936 co-relation queries the response was YES. [2024-11-28 03:02:00,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60634 conditions, 7707 events. 5155/7707 cut-off events. For 112936/112936 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 44015 event pairs, 1178 based on Foata normal form. 123/7830 useless extension candidates. Maximal degree in co-relation 60100. Up to 3351 conditions per place. [2024-11-28 03:02:00,813 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 732 selfloop transitions, 99 changer transitions 60/892 dead transitions. [2024-11-28 03:02:00,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 892 transitions, 15997 flow [2024-11-28 03:02:00,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:02:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:02:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-11-28 03:02:00,814 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4962962962962963 [2024-11-28 03:02:00,814 INFO L175 Difference]: Start difference. First operand has 274 places, 675 transitions, 11620 flow. Second operand 10 states and 134 transitions. [2024-11-28 03:02:00,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 892 transitions, 15997 flow [2024-11-28 03:02:02,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 892 transitions, 15882 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-11-28 03:02:02,225 INFO L231 Difference]: Finished difference. Result has 284 places, 665 transitions, 11677 flow [2024-11-28 03:02:02,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11456, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11677, PETRI_PLACES=284, PETRI_TRANSITIONS=665} [2024-11-28 03:02:02,230 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 255 predicate places. [2024-11-28 03:02:02,231 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 665 transitions, 11677 flow [2024-11-28 03:02:02,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.125) internal successors, (98), 16 states have internal predecessors, (98), 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) [2024-11-28 03:02:02,231 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:02,231 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:02,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-28 03:02:02,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 03:02:02,432 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:02,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:02,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1259770954, now seen corresponding path program 2 times [2024-11-28 03:02:02,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:02,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713601346] [2024-11-28 03:02:02,432 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:02:02,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:02,442 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:02:02,442 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:02,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:02,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713601346] [2024-11-28 03:02:02,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713601346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:02,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187961073] [2024-11-28 03:02:02,531 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:02:02,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:02,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:02,533 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:02,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 03:02:02,620 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:02:02,620 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:02,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:02:02,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:02,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:02,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187961073] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:02,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:02,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-28 03:02:02,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602493982] [2024-11-28 03:02:02,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:02,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:02:02,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:02,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:02:02,836 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:02:02,836 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:02,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 665 transitions, 11677 flow. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 17 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:02,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:02,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:02,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:05,178 INFO L124 PetriNetUnfolderBase]: 5193/7621 cut-off events. [2024-11-28 03:02:05,178 INFO L125 PetriNetUnfolderBase]: For 131209/131209 co-relation queries the response was YES. [2024-11-28 03:02:05,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62894 conditions, 7621 events. 5193/7621 cut-off events. For 131209/131209 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 41837 event pairs, 1217 based on Foata normal form. 135/7756 useless extension candidates. Maximal degree in co-relation 62320. Up to 3351 conditions per place. [2024-11-28 03:02:05,277 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 740 selfloop transitions, 133 changer transitions 45/919 dead transitions. [2024-11-28 03:02:05,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 919 transitions, 16750 flow [2024-11-28 03:02:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:02:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:02:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-11-28 03:02:05,278 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4703703703703704 [2024-11-28 03:02:05,278 INFO L175 Difference]: Start difference. First operand has 284 places, 665 transitions, 11677 flow. Second operand 10 states and 127 transitions. [2024-11-28 03:02:05,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 919 transitions, 16750 flow [2024-11-28 03:02:06,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 919 transitions, 16214 flow, removed 99 selfloop flow, removed 10 redundant places. [2024-11-28 03:02:06,855 INFO L231 Difference]: Finished difference. Result has 284 places, 691 transitions, 12043 flow [2024-11-28 03:02:06,856 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11269, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12043, PETRI_PLACES=284, PETRI_TRANSITIONS=691} [2024-11-28 03:02:06,857 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 255 predicate places. [2024-11-28 03:02:06,859 INFO L471 AbstractCegarLoop]: Abstraction has has 284 places, 691 transitions, 12043 flow [2024-11-28 03:02:06,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 17 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:06,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:06,860 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:06,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 03:02:07,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 03:02:07,061 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:07,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:07,061 INFO L85 PathProgramCache]: Analyzing trace with hash -250325760, now seen corresponding path program 3 times [2024-11-28 03:02:07,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:07,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181123969] [2024-11-28 03:02:07,061 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:02:07,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:07,071 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:02:07,071 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:07,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:07,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181123969] [2024-11-28 03:02:07,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181123969] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:07,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122599034] [2024-11-28 03:02:07,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:02:07,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:07,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:07,182 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:07,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 03:02:07,271 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:02:07,271 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:07,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:02:07,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:07,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:07,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122599034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:07,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:07,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-28 03:02:07,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468948979] [2024-11-28 03:02:07,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:07,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:02:07,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:07,464 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:02:07,464 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:02:07,464 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:07,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 691 transitions, 12043 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:07,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:07,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:07,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:09,638 INFO L124 PetriNetUnfolderBase]: 4935/7291 cut-off events. [2024-11-28 03:02:09,638 INFO L125 PetriNetUnfolderBase]: For 131290/131290 co-relation queries the response was YES. [2024-11-28 03:02:09,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61184 conditions, 7291 events. 4935/7291 cut-off events. For 131290/131290 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 40421 event pairs, 1209 based on Foata normal form. 187/7478 useless extension candidates. Maximal degree in co-relation 60559. Up to 3351 conditions per place. [2024-11-28 03:02:09,718 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 722 selfloop transitions, 110 changer transitions 31/864 dead transitions. [2024-11-28 03:02:09,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 864 transitions, 15695 flow [2024-11-28 03:02:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:02:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:02:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-11-28 03:02:09,719 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-11-28 03:02:09,720 INFO L175 Difference]: Start difference. First operand has 284 places, 691 transitions, 12043 flow. Second operand 10 states and 125 transitions. [2024-11-28 03:02:09,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 864 transitions, 15695 flow [2024-11-28 03:02:11,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 864 transitions, 15291 flow, removed 112 selfloop flow, removed 8 redundant places. [2024-11-28 03:02:11,438 INFO L231 Difference]: Finished difference. Result has 283 places, 654 transitions, 11337 flow [2024-11-28 03:02:11,439 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11213, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11337, PETRI_PLACES=283, PETRI_TRANSITIONS=654} [2024-11-28 03:02:11,439 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 254 predicate places. [2024-11-28 03:02:11,440 INFO L471 AbstractCegarLoop]: Abstraction has has 283 places, 654 transitions, 11337 flow [2024-11-28 03:02:11,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:11,440 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:11,440 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:11,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 03:02:11,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:11,641 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:11,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:11,641 INFO L85 PathProgramCache]: Analyzing trace with hash -194491450, now seen corresponding path program 4 times [2024-11-28 03:02:11,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:11,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522066795] [2024-11-28 03:02:11,641 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:02:11,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:11,649 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:02:11,650 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:11,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:11,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522066795] [2024-11-28 03:02:11,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522066795] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:11,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126432478] [2024-11-28 03:02:11,719 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:02:11,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:11,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:11,721 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:11,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 03:02:11,819 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:02:11,819 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:11,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 03:02:11,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:11,908 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:11,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126432478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:11,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:11,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-11-28 03:02:11,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620351908] [2024-11-28 03:02:11,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:11,981 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:02:11,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:11,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:02:11,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:02:11,982 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:11,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 654 transitions, 11337 flow. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 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) [2024-11-28 03:02:11,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:11,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:11,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:15,048 INFO L124 PetriNetUnfolderBase]: 5337/7930 cut-off events. [2024-11-28 03:02:15,048 INFO L125 PetriNetUnfolderBase]: For 136475/136475 co-relation queries the response was YES. [2024-11-28 03:02:15,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65111 conditions, 7930 events. 5337/7930 cut-off events. For 136475/136475 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 44867 event pairs, 787 based on Foata normal form. 39/7969 useless extension candidates. Maximal degree in co-relation 64488. Up to 3572 conditions per place. [2024-11-28 03:02:15,237 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 642 selfloop transitions, 267 changer transitions 2/912 dead transitions. [2024-11-28 03:02:15,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 912 transitions, 17011 flow [2024-11-28 03:02:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:02:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:02:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-11-28 03:02:15,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-11-28 03:02:15,238 INFO L175 Difference]: Start difference. First operand has 283 places, 654 transitions, 11337 flow. Second operand 12 states and 152 transitions. [2024-11-28 03:02:15,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 912 transitions, 17011 flow [2024-11-28 03:02:17,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 912 transitions, 16577 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-11-28 03:02:17,131 INFO L231 Difference]: Finished difference. Result has 295 places, 719 transitions, 13267 flow [2024-11-28 03:02:17,131 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11133, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13267, PETRI_PLACES=295, PETRI_TRANSITIONS=719} [2024-11-28 03:02:17,132 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 266 predicate places. [2024-11-28 03:02:17,132 INFO L471 AbstractCegarLoop]: Abstraction has has 295 places, 719 transitions, 13267 flow [2024-11-28 03:02:17,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 13 states have internal predecessors, (82), 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) [2024-11-28 03:02:17,132 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:17,132 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:17,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-28 03:02:17,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-28 03:02:17,333 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:17,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1496454694, now seen corresponding path program 5 times [2024-11-28 03:02:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:17,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286016365] [2024-11-28 03:02:17,334 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:02:17,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:17,343 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:02:17,344 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:17,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:17,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286016365] [2024-11-28 03:02:17,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286016365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:17,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942214791] [2024-11-28 03:02:17,445 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:02:17,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:17,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:17,449 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:17,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 03:02:17,551 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:02:17,551 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:17,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:02:17,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:17,641 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:17,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942214791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:17,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:17,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-28 03:02:17,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824689607] [2024-11-28 03:02:17,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:17,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:02:17,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:17,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:02:17,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:02:17,946 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:17,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 719 transitions, 13267 flow. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-11-28 03:02:17,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:17,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:17,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:20,837 INFO L124 PetriNetUnfolderBase]: 5805/8617 cut-off events. [2024-11-28 03:02:20,838 INFO L125 PetriNetUnfolderBase]: For 173429/173429 co-relation queries the response was YES. [2024-11-28 03:02:20,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74495 conditions, 8617 events. 5805/8617 cut-off events. For 173429/173429 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 49575 event pairs, 984 based on Foata normal form. 219/8836 useless extension candidates. Maximal degree in co-relation 73864. Up to 3491 conditions per place. [2024-11-28 03:02:21,019 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 696 selfloop transitions, 146 changer transitions 34/877 dead transitions. [2024-11-28 03:02:21,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 877 transitions, 17143 flow [2024-11-28 03:02:21,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:02:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:02:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-11-28 03:02:21,021 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-11-28 03:02:21,021 INFO L175 Difference]: Start difference. First operand has 295 places, 719 transitions, 13267 flow. Second operand 10 states and 129 transitions. [2024-11-28 03:02:21,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 877 transitions, 17143 flow [2024-11-28 03:02:23,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 877 transitions, 16921 flow, removed 111 selfloop flow, removed 0 redundant places. [2024-11-28 03:02:23,539 INFO L231 Difference]: Finished difference. Result has 307 places, 745 transitions, 14080 flow [2024-11-28 03:02:23,540 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13127, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14080, PETRI_PLACES=307, PETRI_TRANSITIONS=745} [2024-11-28 03:02:23,540 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 278 predicate places. [2024-11-28 03:02:23,541 INFO L471 AbstractCegarLoop]: Abstraction has has 307 places, 745 transitions, 14080 flow [2024-11-28 03:02:23,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 15 states have internal predecessors, (96), 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) [2024-11-28 03:02:23,541 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:23,541 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:23,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-28 03:02:23,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-28 03:02:23,742 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:23,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:23,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2028686480, now seen corresponding path program 6 times [2024-11-28 03:02:23,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:23,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765864821] [2024-11-28 03:02:23,742 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:02:23,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:23,750 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:02:23,750 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:23,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:23,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765864821] [2024-11-28 03:02:23,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765864821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:23,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024228036] [2024-11-28 03:02:23,826 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:02:23,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:23,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:23,827 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:23,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 03:02:23,911 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:02:23,911 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:23,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:02:23,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:24,030 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:24,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024228036] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:24,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:24,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-28 03:02:24,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099651640] [2024-11-28 03:02:24,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:24,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 03:02:24,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:24,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 03:02:24,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-11-28 03:02:24,129 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:24,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 745 transitions, 14080 flow. Second operand has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 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) [2024-11-28 03:02:24,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:24,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:24,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:27,326 INFO L124 PetriNetUnfolderBase]: 5433/8145 cut-off events. [2024-11-28 03:02:27,326 INFO L125 PetriNetUnfolderBase]: For 176605/176605 co-relation queries the response was YES. [2024-11-28 03:02:27,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72391 conditions, 8145 events. 5433/8145 cut-off events. For 176605/176605 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 47327 event pairs, 1185 based on Foata normal form. 171/8316 useless extension candidates. Maximal degree in co-relation 71756. Up to 3491 conditions per place. [2024-11-28 03:02:27,416 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 707 selfloop transitions, 98 changer transitions 42/848 dead transitions. [2024-11-28 03:02:27,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 848 transitions, 17214 flow [2024-11-28 03:02:27,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 03:02:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 03:02:27,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 113 transitions. [2024-11-28 03:02:27,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46502057613168724 [2024-11-28 03:02:27,417 INFO L175 Difference]: Start difference. First operand has 307 places, 745 transitions, 14080 flow. Second operand 9 states and 113 transitions. [2024-11-28 03:02:27,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 848 transitions, 17214 flow [2024-11-28 03:02:29,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 848 transitions, 17133 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-11-28 03:02:29,424 INFO L231 Difference]: Finished difference. Result has 316 places, 723 transitions, 13949 flow [2024-11-28 03:02:29,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13595, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13949, PETRI_PLACES=316, PETRI_TRANSITIONS=723} [2024-11-28 03:02:29,425 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 287 predicate places. [2024-11-28 03:02:29,425 INFO L471 AbstractCegarLoop]: Abstraction has has 316 places, 723 transitions, 13949 flow [2024-11-28 03:02:29,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.176470588235294) internal successors, (105), 17 states have internal predecessors, (105), 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) [2024-11-28 03:02:29,425 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:29,425 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:29,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 03:02:29,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:29,625 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:29,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:29,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1545337226, now seen corresponding path program 7 times [2024-11-28 03:02:29,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:29,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728062858] [2024-11-28 03:02:29,626 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:02:29,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:29,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:29,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728062858] [2024-11-28 03:02:29,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728062858] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:29,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803197305] [2024-11-28 03:02:29,739 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:02:29,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:29,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:29,746 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:29,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 03:02:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:02:29,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:02:29,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:29,947 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:30,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803197305] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:30,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:30,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-28 03:02:30,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029889426] [2024-11-28 03:02:30,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:30,048 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:02:30,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:30,048 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:02:30,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:02:30,049 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:30,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 723 transitions, 13949 flow. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:30,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:30,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:30,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:32,696 INFO L124 PetriNetUnfolderBase]: 5208/7917 cut-off events. [2024-11-28 03:02:32,697 INFO L125 PetriNetUnfolderBase]: For 179241/179241 co-relation queries the response was YES. [2024-11-28 03:02:32,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70736 conditions, 7917 events. 5208/7917 cut-off events. For 179241/179241 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 46756 event pairs, 1069 based on Foata normal form. 219/8136 useless extension candidates. Maximal degree in co-relation 70278. Up to 3491 conditions per place. [2024-11-28 03:02:32,840 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 677 selfloop transitions, 103 changer transitions 35/816 dead transitions. [2024-11-28 03:02:32,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 816 transitions, 16360 flow [2024-11-28 03:02:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:02:32,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:02:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 123 transitions. [2024-11-28 03:02:32,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-11-28 03:02:32,841 INFO L175 Difference]: Start difference. First operand has 316 places, 723 transitions, 13949 flow. Second operand 10 states and 123 transitions. [2024-11-28 03:02:32,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 816 transitions, 16360 flow [2024-11-28 03:02:34,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 816 transitions, 16147 flow, removed 82 selfloop flow, removed 7 redundant places. [2024-11-28 03:02:34,702 INFO L231 Difference]: Finished difference. Result has 316 places, 683 transitions, 13066 flow [2024-11-28 03:02:34,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=12602, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13066, PETRI_PLACES=316, PETRI_TRANSITIONS=683} [2024-11-28 03:02:34,703 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 287 predicate places. [2024-11-28 03:02:34,704 INFO L471 AbstractCegarLoop]: Abstraction has has 316 places, 683 transitions, 13066 flow [2024-11-28 03:02:34,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:34,704 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:34,704 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:34,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-28 03:02:34,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:34,904 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:34,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:34,905 INFO L85 PathProgramCache]: Analyzing trace with hash -94528403, now seen corresponding path program 9 times [2024-11-28 03:02:34,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:34,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459962963] [2024-11-28 03:02:34,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:02:34,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:34,916 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:02:34,916 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:35,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459962963] [2024-11-28 03:02:35,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459962963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533283849] [2024-11-28 03:02:35,123 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:02:35,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:35,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:35,127 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:35,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 03:02:35,242 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:02:35,242 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:35,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 03:02:35,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:35,430 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 03:02:35,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533283849] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:35,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:35,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-28 03:02:35,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927412859] [2024-11-28 03:02:35,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:35,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:02:35,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:35,524 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:02:35,524 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:02:35,524 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:35,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 683 transitions, 13066 flow. Second operand has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 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) [2024-11-28 03:02:35,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:35,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:35,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:37,119 INFO L124 PetriNetUnfolderBase]: 3173/4820 cut-off events. [2024-11-28 03:02:37,119 INFO L125 PetriNetUnfolderBase]: For 95070/95070 co-relation queries the response was YES. [2024-11-28 03:02:37,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43674 conditions, 4820 events. 3173/4820 cut-off events. For 95070/95070 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 25903 event pairs, 904 based on Foata normal form. 263/5083 useless extension candidates. Maximal degree in co-relation 43552. Up to 3491 conditions per place. [2024-11-28 03:02:37,201 INFO L140 encePairwiseOnDemand]: 21/27 looper letters, 425 selfloop transitions, 3 changer transitions 203/632 dead transitions. [2024-11-28 03:02:37,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 632 transitions, 13434 flow [2024-11-28 03:02:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 03:02:37,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-28 03:02:37,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-11-28 03:02:37,203 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-11-28 03:02:37,203 INFO L175 Difference]: Start difference. First operand has 316 places, 683 transitions, 13066 flow. Second operand 7 states and 87 transitions. [2024-11-28 03:02:37,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 632 transitions, 13434 flow [2024-11-28 03:02:38,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 632 transitions, 13028 flow, removed 37 selfloop flow, removed 23 redundant places. [2024-11-28 03:02:38,280 INFO L231 Difference]: Finished difference. Result has 286 places, 429 transitions, 7451 flow [2024-11-28 03:02:38,281 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=11710, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7451, PETRI_PLACES=286, PETRI_TRANSITIONS=429} [2024-11-28 03:02:38,281 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 257 predicate places. [2024-11-28 03:02:38,281 INFO L471 AbstractCegarLoop]: Abstraction has has 286 places, 429 transitions, 7451 flow [2024-11-28 03:02:38,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.0) internal successors, (98), 14 states have internal predecessors, (98), 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) [2024-11-28 03:02:38,282 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:38,282 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:38,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-28 03:02:38,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 03:02:38,482 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:38,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:38,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1659579774, now seen corresponding path program 10 times [2024-11-28 03:02:38,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:38,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276890280] [2024-11-28 03:02:38,483 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:02:38,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:38,490 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:02:38,490 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:38,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:38,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276890280] [2024-11-28 03:02:38,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276890280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:38,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897667340] [2024-11-28 03:02:38,555 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:02:38,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:38,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:38,557 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:38,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 03:02:38,652 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:02:38,652 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:38,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:02:38,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:38,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:38,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897667340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:38,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:38,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-28 03:02:38,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544671722] [2024-11-28 03:02:38,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:38,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 03:02:38,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:38,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 03:02:38,820 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-28 03:02:38,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:38,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 429 transitions, 7451 flow. Second operand has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 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) [2024-11-28 03:02:38,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:38,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:38,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:40,391 INFO L124 PetriNetUnfolderBase]: 2733/3913 cut-off events. [2024-11-28 03:02:40,392 INFO L125 PetriNetUnfolderBase]: For 72274/72274 co-relation queries the response was YES. [2024-11-28 03:02:40,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34027 conditions, 3913 events. 2733/3913 cut-off events. For 72274/72274 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 18159 event pairs, 256 based on Foata normal form. 6/3919 useless extension candidates. Maximal degree in co-relation 33919. Up to 1905 conditions per place. [2024-11-28 03:02:40,432 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 447 selfloop transitions, 139 changer transitions 0/587 dead transitions. [2024-11-28 03:02:40,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 587 transitions, 10736 flow [2024-11-28 03:02:40,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 03:02:40,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-28 03:02:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-11-28 03:02:40,433 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2024-11-28 03:02:40,434 INFO L175 Difference]: Start difference. First operand has 286 places, 429 transitions, 7451 flow. Second operand 12 states and 147 transitions. [2024-11-28 03:02:40,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 587 transitions, 10736 flow [2024-11-28 03:02:40,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 587 transitions, 9805 flow, removed 313 selfloop flow, removed 24 redundant places. [2024-11-28 03:02:40,939 INFO L231 Difference]: Finished difference. Result has 216 places, 475 transitions, 7930 flow [2024-11-28 03:02:40,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=6758, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7930, PETRI_PLACES=216, PETRI_TRANSITIONS=475} [2024-11-28 03:02:40,941 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 187 predicate places. [2024-11-28 03:02:40,941 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 475 transitions, 7930 flow [2024-11-28 03:02:40,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.142857142857143) internal successors, (86), 14 states have internal predecessors, (86), 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) [2024-11-28 03:02:40,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:40,941 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:40,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-28 03:02:41,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 03:02:41,142 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:41,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:41,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1525003783, now seen corresponding path program 8 times [2024-11-28 03:02:41,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:41,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027283767] [2024-11-28 03:02:41,143 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:02:41,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:41,153 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:02:41,153 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:41,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:41,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027283767] [2024-11-28 03:02:41,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027283767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:41,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111723913] [2024-11-28 03:02:41,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:02:41,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:41,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:41,308 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:41,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 03:02:41,420 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:02:41,421 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:41,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:02:41,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:41,563 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:41,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111723913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:41,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:41,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-11-28 03:02:41,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839278660] [2024-11-28 03:02:41,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:41,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:02:41,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:41,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:02:41,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:02:41,686 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:41,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 475 transitions, 7930 flow. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:41,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:41,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:41,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:42,932 INFO L124 PetriNetUnfolderBase]: 3188/4592 cut-off events. [2024-11-28 03:02:42,932 INFO L125 PetriNetUnfolderBase]: For 84746/84746 co-relation queries the response was YES. [2024-11-28 03:02:42,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38690 conditions, 4592 events. 3188/4592 cut-off events. For 84746/84746 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 22037 event pairs, 308 based on Foata normal form. 44/4636 useless extension candidates. Maximal degree in co-relation 38589. Up to 1549 conditions per place. [2024-11-28 03:02:43,001 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 513 selfloop transitions, 193 changer transitions 0/707 dead transitions. [2024-11-28 03:02:43,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 707 transitions, 12899 flow [2024-11-28 03:02:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:02:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:02:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-11-28 03:02:43,003 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40370370370370373 [2024-11-28 03:02:43,003 INFO L175 Difference]: Start difference. First operand has 216 places, 475 transitions, 7930 flow. Second operand 10 states and 109 transitions. [2024-11-28 03:02:43,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 707 transitions, 12899 flow [2024-11-28 03:02:43,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 707 transitions, 12412 flow, removed 116 selfloop flow, removed 4 redundant places. [2024-11-28 03:02:43,672 INFO L231 Difference]: Finished difference. Result has 224 places, 502 transitions, 8708 flow [2024-11-28 03:02:43,672 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=7562, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8708, PETRI_PLACES=224, PETRI_TRANSITIONS=502} [2024-11-28 03:02:43,673 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 195 predicate places. [2024-11-28 03:02:43,673 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 502 transitions, 8708 flow [2024-11-28 03:02:43,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 19 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:43,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:43,673 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:43,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 03:02:43,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:43,874 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:43,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:43,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2038150419, now seen corresponding path program 9 times [2024-11-28 03:02:43,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:43,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005163883] [2024-11-28 03:02:43,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:02:43,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:43,884 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:02:43,884 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:02:44,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005163883] [2024-11-28 03:02:44,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005163883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:44,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904413463] [2024-11-28 03:02:44,033 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:02:44,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:44,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:44,037 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:44,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 03:02:44,139 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:02:44,140 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:44,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:02:44,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:02:44,259 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:02:44,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904413463] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:44,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:44,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-28 03:02:44,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019756337] [2024-11-28 03:02:44,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:44,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:02:44,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:44,389 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:02:44,389 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:02:44,389 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:44,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 502 transitions, 8708 flow. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:44,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:44,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:44,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:46,298 INFO L124 PetriNetUnfolderBase]: 3575/5209 cut-off events. [2024-11-28 03:02:46,298 INFO L125 PetriNetUnfolderBase]: For 97736/97736 co-relation queries the response was YES. [2024-11-28 03:02:46,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44540 conditions, 5209 events. 3575/5209 cut-off events. For 97736/97736 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 26136 event pairs, 566 based on Foata normal form. 67/5276 useless extension candidates. Maximal degree in co-relation 44437. Up to 2937 conditions per place. [2024-11-28 03:02:46,349 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 538 selfloop transitions, 295 changer transitions 0/834 dead transitions. [2024-11-28 03:02:46,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 834 transitions, 15338 flow [2024-11-28 03:02:46,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:02:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 03:02:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 175 transitions. [2024-11-28 03:02:46,350 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4050925925925926 [2024-11-28 03:02:46,350 INFO L175 Difference]: Start difference. First operand has 224 places, 502 transitions, 8708 flow. Second operand 16 states and 175 transitions. [2024-11-28 03:02:46,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 834 transitions, 15338 flow [2024-11-28 03:02:47,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 834 transitions, 14939 flow, removed 98 selfloop flow, removed 6 redundant places. [2024-11-28 03:02:47,055 INFO L231 Difference]: Finished difference. Result has 237 places, 597 transitions, 10835 flow [2024-11-28 03:02:47,055 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=8429, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10835, PETRI_PLACES=237, PETRI_TRANSITIONS=597} [2024-11-28 03:02:47,056 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 208 predicate places. [2024-11-28 03:02:47,056 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 597 transitions, 10835 flow [2024-11-28 03:02:47,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:47,056 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:47,056 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:47,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-28 03:02:47,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:47,257 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:47,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:47,257 INFO L85 PathProgramCache]: Analyzing trace with hash -708920431, now seen corresponding path program 10 times [2024-11-28 03:02:47,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:47,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941298617] [2024-11-28 03:02:47,257 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:02:47,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:47,266 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:02:47,266 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:47,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:47,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941298617] [2024-11-28 03:02:47,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941298617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:47,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420373402] [2024-11-28 03:02:47,330 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:02:47,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:47,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:47,332 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:47,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 03:02:47,426 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:02:47,426 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:47,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:02:47,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:47,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:47,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420373402] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:47,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:47,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2024-11-28 03:02:47,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415788225] [2024-11-28 03:02:47,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:47,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 03:02:47,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:47,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 03:02:47,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-28 03:02:47,569 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:47,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 597 transitions, 10835 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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) [2024-11-28 03:02:47,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:47,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:47,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:49,407 INFO L124 PetriNetUnfolderBase]: 3966/5826 cut-off events. [2024-11-28 03:02:49,408 INFO L125 PetriNetUnfolderBase]: For 115785/115785 co-relation queries the response was YES. [2024-11-28 03:02:49,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51894 conditions, 5826 events. 3966/5826 cut-off events. For 115785/115785 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 30160 event pairs, 162 based on Foata normal form. 8/5834 useless extension candidates. Maximal degree in co-relation 51787. Up to 1736 conditions per place. [2024-11-28 03:02:49,537 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 640 selfloop transitions, 191 changer transitions 0/832 dead transitions. [2024-11-28 03:02:49,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 832 transitions, 16270 flow [2024-11-28 03:02:49,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 03:02:49,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-28 03:02:49,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 170 transitions. [2024-11-28 03:02:49,538 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-11-28 03:02:49,538 INFO L175 Difference]: Start difference. First operand has 237 places, 597 transitions, 10835 flow. Second operand 14 states and 170 transitions. [2024-11-28 03:02:49,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 832 transitions, 16270 flow [2024-11-28 03:02:50,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 832 transitions, 15111 flow, removed 356 selfloop flow, removed 8 redundant places. [2024-11-28 03:02:50,693 INFO L231 Difference]: Finished difference. Result has 250 places, 650 transitions, 11495 flow [2024-11-28 03:02:50,694 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10085, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11495, PETRI_PLACES=250, PETRI_TRANSITIONS=650} [2024-11-28 03:02:50,694 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 221 predicate places. [2024-11-28 03:02:50,694 INFO L471 AbstractCegarLoop]: Abstraction has has 250 places, 650 transitions, 11495 flow [2024-11-28 03:02:50,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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) [2024-11-28 03:02:50,695 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:50,695 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:50,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 03:02:50,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 03:02:50,895 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:50,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash 821495179, now seen corresponding path program 11 times [2024-11-28 03:02:50,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:50,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623989072] [2024-11-28 03:02:50,896 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:02:50,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:50,909 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:02:50,909 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:51,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:51,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623989072] [2024-11-28 03:02:51,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623989072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:51,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200450861] [2024-11-28 03:02:51,033 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:02:51,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:51,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:51,036 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:51,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 03:02:51,153 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:02:51,153 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:51,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:02:51,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:51,309 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:51,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200450861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:51,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:51,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2024-11-28 03:02:51,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951371481] [2024-11-28 03:02:51,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:51,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 03:02:51,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:51,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 03:02:51,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-28 03:02:51,389 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:51,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 650 transitions, 11495 flow. Second operand has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:51,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:51,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:51,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:53,726 INFO L124 PetriNetUnfolderBase]: 3909/5705 cut-off events. [2024-11-28 03:02:53,726 INFO L125 PetriNetUnfolderBase]: For 115936/115936 co-relation queries the response was YES. [2024-11-28 03:02:53,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51700 conditions, 5705 events. 3909/5705 cut-off events. For 115936/115936 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29181 event pairs, 252 based on Foata normal form. 88/5793 useless extension candidates. Maximal degree in co-relation 51585. Up to 1744 conditions per place. [2024-11-28 03:02:53,803 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 436 selfloop transitions, 533 changer transitions 0/970 dead transitions. [2024-11-28 03:02:53,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 970 transitions, 18064 flow [2024-11-28 03:02:53,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 03:02:53,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-28 03:02:53,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 357 transitions. [2024-11-28 03:02:53,805 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-11-28 03:02:53,805 INFO L175 Difference]: Start difference. First operand has 250 places, 650 transitions, 11495 flow. Second operand 35 states and 357 transitions. [2024-11-28 03:02:53,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 970 transitions, 18064 flow [2024-11-28 03:02:54,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 970 transitions, 17518 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-11-28 03:02:54,829 INFO L231 Difference]: Finished difference. Result has 278 places, 771 transitions, 14301 flow [2024-11-28 03:02:54,829 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=10989, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=14301, PETRI_PLACES=278, PETRI_TRANSITIONS=771} [2024-11-28 03:02:54,830 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 249 predicate places. [2024-11-28 03:02:54,830 INFO L471 AbstractCegarLoop]: Abstraction has has 278 places, 771 transitions, 14301 flow [2024-11-28 03:02:54,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.75) internal successors, (108), 16 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:54,830 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:54,830 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:54,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-28 03:02:55,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 03:02:55,031 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:55,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:55,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1387167631, now seen corresponding path program 12 times [2024-11-28 03:02:55,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:55,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801047591] [2024-11-28 03:02:55,031 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:02:55,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:55,044 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:02:55,045 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:55,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:55,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801047591] [2024-11-28 03:02:55,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801047591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:55,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214348278] [2024-11-28 03:02:55,204 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:02:55,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:55,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:55,206 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:55,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 03:02:55,328 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:02:55,328 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:55,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:02:55,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:55,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:55,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214348278] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:55,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:55,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-28 03:02:55,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452997288] [2024-11-28 03:02:55,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:55,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:02:55,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:55,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:02:55,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:02:55,723 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:55,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 771 transitions, 14301 flow. Second operand has 21 states, 21 states have (on average 5.904761904761905) internal successors, (124), 21 states have internal predecessors, (124), 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) [2024-11-28 03:02:55,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:55,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:55,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:02:57,736 INFO L124 PetriNetUnfolderBase]: 3969/5811 cut-off events. [2024-11-28 03:02:57,736 INFO L125 PetriNetUnfolderBase]: For 118493/118493 co-relation queries the response was YES. [2024-11-28 03:02:57,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53730 conditions, 5811 events. 3969/5811 cut-off events. For 118493/118493 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 29775 event pairs, 513 based on Foata normal form. 46/5857 useless extension candidates. Maximal degree in co-relation 53616. Up to 2617 conditions per place. [2024-11-28 03:02:57,825 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 522 selfloop transitions, 393 changer transitions 0/916 dead transitions. [2024-11-28 03:02:57,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 916 transitions, 18106 flow [2024-11-28 03:02:57,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 03:02:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-28 03:02:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 133 transitions. [2024-11-28 03:02:57,827 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3789173789173789 [2024-11-28 03:02:57,827 INFO L175 Difference]: Start difference. First operand has 278 places, 771 transitions, 14301 flow. Second operand 13 states and 133 transitions. [2024-11-28 03:02:57,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 916 transitions, 18106 flow [2024-11-28 03:02:59,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 916 transitions, 16845 flow, removed 316 selfloop flow, removed 13 redundant places. [2024-11-28 03:02:59,093 INFO L231 Difference]: Finished difference. Result has 278 places, 783 transitions, 14115 flow [2024-11-28 03:02:59,093 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13138, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=381, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14115, PETRI_PLACES=278, PETRI_TRANSITIONS=783} [2024-11-28 03:02:59,094 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 249 predicate places. [2024-11-28 03:02:59,094 INFO L471 AbstractCegarLoop]: Abstraction has has 278 places, 783 transitions, 14115 flow [2024-11-28 03:02:59,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.904761904761905) internal successors, (124), 21 states have internal predecessors, (124), 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) [2024-11-28 03:02:59,094 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:02:59,094 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:02:59,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 03:02:59,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:59,295 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:02:59,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:02:59,296 INFO L85 PathProgramCache]: Analyzing trace with hash -988541388, now seen corresponding path program 11 times [2024-11-28 03:02:59,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:02:59,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629536749] [2024-11-28 03:02:59,296 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:02:59,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:02:59,308 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:02:59,308 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:02:59,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:02:59,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629536749] [2024-11-28 03:02:59,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629536749] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:02:59,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828096747] [2024-11-28 03:02:59,407 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:02:59,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:02:59,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:02:59,409 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:02:59,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 03:02:59,498 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:02:59,499 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:02:59,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:02:59,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:02:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:59,599 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:02:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:02:59,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828096747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:02:59,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:02:59,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-28 03:02:59,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908595234] [2024-11-28 03:02:59,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:02:59,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:02:59,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:02:59,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:02:59,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:02:59,700 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:02:59,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 783 transitions, 14115 flow. Second operand has 19 states, 19 states have (on average 6.315789473684211) internal successors, (120), 19 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:02:59,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:02:59,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:02:59,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:02,933 INFO L124 PetriNetUnfolderBase]: 5196/7643 cut-off events. [2024-11-28 03:03:02,934 INFO L125 PetriNetUnfolderBase]: For 150791/150791 co-relation queries the response was YES. [2024-11-28 03:03:03,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69710 conditions, 7643 events. 5196/7643 cut-off events. For 150791/150791 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 41519 event pairs, 170 based on Foata normal form. 71/7714 useless extension candidates. Maximal degree in co-relation 69599. Up to 2489 conditions per place. [2024-11-28 03:03:03,059 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 448 selfloop transitions, 819 changer transitions 0/1268 dead transitions. [2024-11-28 03:03:03,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1268 transitions, 23818 flow [2024-11-28 03:03:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 03:03:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-28 03:03:03,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 457 transitions. [2024-11-28 03:03:03,060 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3846801346801347 [2024-11-28 03:03:03,060 INFO L175 Difference]: Start difference. First operand has 278 places, 783 transitions, 14115 flow. Second operand 44 states and 457 transitions. [2024-11-28 03:03:03,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1268 transitions, 23818 flow [2024-11-28 03:03:04,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1268 transitions, 23045 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-11-28 03:03:04,743 INFO L231 Difference]: Finished difference. Result has 322 places, 1023 transitions, 19795 flow [2024-11-28 03:03:04,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=13393, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=19795, PETRI_PLACES=322, PETRI_TRANSITIONS=1023} [2024-11-28 03:03:04,744 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 293 predicate places. [2024-11-28 03:03:04,744 INFO L471 AbstractCegarLoop]: Abstraction has has 322 places, 1023 transitions, 19795 flow [2024-11-28 03:03:04,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.315789473684211) internal successors, (120), 19 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:04,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:04,744 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:04,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 03:03:04,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:04,944 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:03:04,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:04,945 INFO L85 PathProgramCache]: Analyzing trace with hash -282358198, now seen corresponding path program 12 times [2024-11-28 03:03:04,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:04,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036455339] [2024-11-28 03:03:04,945 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:03:04,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:04,956 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:03:04,956 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:03:05,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:05,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036455339] [2024-11-28 03:03:05,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036455339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:05,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398004217] [2024-11-28 03:03:05,055 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 03:03:05,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:05,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:05,057 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:05,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 03:03:05,163 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-28 03:03:05,163 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:05,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:03:05,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:03:05,294 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:03:05,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398004217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:05,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:05,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-28 03:03:05,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905768388] [2024-11-28 03:03:05,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:05,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 03:03:05,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:05,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 03:03:05,403 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-28 03:03:05,403 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:03:05,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 1023 transitions, 19795 flow. Second operand has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:05,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:05,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:03:05,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:08,498 INFO L124 PetriNetUnfolderBase]: 5223/7688 cut-off events. [2024-11-28 03:03:08,498 INFO L125 PetriNetUnfolderBase]: For 163495/163495 co-relation queries the response was YES. [2024-11-28 03:03:08,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74194 conditions, 7688 events. 5223/7688 cut-off events. For 163495/163495 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 41947 event pairs, 995 based on Foata normal form. 38/7726 useless extension candidates. Maximal degree in co-relation 74072. Up to 5103 conditions per place. [2024-11-28 03:03:08,655 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 888 selfloop transitions, 227 changer transitions 0/1116 dead transitions. [2024-11-28 03:03:08,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 1116 transitions, 23648 flow [2024-11-28 03:03:08,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:03:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:03:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-11-28 03:03:08,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2024-11-28 03:03:08,656 INFO L175 Difference]: Start difference. First operand has 322 places, 1023 transitions, 19795 flow. Second operand 10 states and 104 transitions. [2024-11-28 03:03:08,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 1116 transitions, 23648 flow [2024-11-28 03:03:10,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1116 transitions, 20453 flow, removed 956 selfloop flow, removed 13 redundant places. [2024-11-28 03:03:10,936 INFO L231 Difference]: Finished difference. Result has 319 places, 1023 transitions, 17527 flow [2024-11-28 03:03:10,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=16978, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17527, PETRI_PLACES=319, PETRI_TRANSITIONS=1023} [2024-11-28 03:03:10,937 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 290 predicate places. [2024-11-28 03:03:10,937 INFO L471 AbstractCegarLoop]: Abstraction has has 319 places, 1023 transitions, 17527 flow [2024-11-28 03:03:10,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.055555555555555) internal successors, (109), 18 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:10,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:10,937 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:10,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-28 03:03:11,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:11,138 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:03:11,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:11,138 INFO L85 PathProgramCache]: Analyzing trace with hash 85865881, now seen corresponding path program 13 times [2024-11-28 03:03:11,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:11,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941637213] [2024-11-28 03:03:11,138 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:03:11,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:11,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:11,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:11,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941637213] [2024-11-28 03:03:11,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941637213] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:11,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231321041] [2024-11-28 03:03:11,236 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:03:11,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:11,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:11,238 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:11,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 03:03:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:11,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:03:11,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:11,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:11,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231321041] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:11,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:11,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-28 03:03:11,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177867190] [2024-11-28 03:03:11,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:11,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:03:11,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:11,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:03:11,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:03:11,587 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:03:11,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 1023 transitions, 17527 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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) [2024-11-28 03:03:11,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:11,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:03:11,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:14,295 INFO L124 PetriNetUnfolderBase]: 5315/7778 cut-off events. [2024-11-28 03:03:14,295 INFO L125 PetriNetUnfolderBase]: For 126584/126584 co-relation queries the response was YES. [2024-11-28 03:03:14,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65687 conditions, 7778 events. 5315/7778 cut-off events. For 126584/126584 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 41959 event pairs, 802 based on Foata normal form. 92/7870 useless extension candidates. Maximal degree in co-relation 65572. Up to 4370 conditions per place. [2024-11-28 03:03:14,451 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 702 selfloop transitions, 520 changer transitions 0/1223 dead transitions. [2024-11-28 03:03:14,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1223 transitions, 22451 flow [2024-11-28 03:03:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 03:03:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-28 03:03:14,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 174 transitions. [2024-11-28 03:03:14,452 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-11-28 03:03:14,452 INFO L175 Difference]: Start difference. First operand has 319 places, 1023 transitions, 17527 flow. Second operand 16 states and 174 transitions. [2024-11-28 03:03:14,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1223 transitions, 22451 flow [2024-11-28 03:03:16,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1223 transitions, 21873 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-11-28 03:03:16,234 INFO L231 Difference]: Finished difference. Result has 330 places, 1086 transitions, 19102 flow [2024-11-28 03:03:16,235 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=16857, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=19102, PETRI_PLACES=330, PETRI_TRANSITIONS=1086} [2024-11-28 03:03:16,235 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 301 predicate places. [2024-11-28 03:03:16,235 INFO L471 AbstractCegarLoop]: Abstraction has has 330 places, 1086 transitions, 19102 flow [2024-11-28 03:03:16,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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) [2024-11-28 03:03:16,235 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:16,236 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:16,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-28 03:03:16,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-28 03:03:16,436 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:03:16,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:16,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1741335208, now seen corresponding path program 13 times [2024-11-28 03:03:16,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:16,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717822176] [2024-11-28 03:03:16,437 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:03:16,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:16,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:16,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717822176] [2024-11-28 03:03:16,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717822176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:16,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823640264] [2024-11-28 03:03:16,574 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 03:03:16,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:16,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:16,576 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:16,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 03:03:16,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 03:03:16,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:03:16,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:16,831 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:16,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823640264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:16,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:16,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2024-11-28 03:03:16,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695657025] [2024-11-28 03:03:16,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:16,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 03:03:16,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:16,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 03:03:16,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-28 03:03:16,958 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:03:16,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 1086 transitions, 19102 flow. Second operand has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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) [2024-11-28 03:03:16,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:16,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:03:16,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:19,450 INFO L124 PetriNetUnfolderBase]: 5357/7848 cut-off events. [2024-11-28 03:03:19,450 INFO L125 PetriNetUnfolderBase]: For 131635/131635 co-relation queries the response was YES. [2024-11-28 03:03:19,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67319 conditions, 7848 events. 5357/7848 cut-off events. For 131635/131635 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 42742 event pairs, 1209 based on Foata normal form. 28/7876 useless extension candidates. Maximal degree in co-relation 67200. Up to 6419 conditions per place. [2024-11-28 03:03:19,602 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 888 selfloop transitions, 257 changer transitions 0/1146 dead transitions. [2024-11-28 03:03:19,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1146 transitions, 22146 flow [2024-11-28 03:03:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 03:03:19,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-28 03:03:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 110 transitions. [2024-11-28 03:03:19,603 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-11-28 03:03:19,603 INFO L175 Difference]: Start difference. First operand has 330 places, 1086 transitions, 19102 flow. Second operand 11 states and 110 transitions. [2024-11-28 03:03:19,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1146 transitions, 22146 flow [2024-11-28 03:03:21,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1146 transitions, 21571 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-11-28 03:03:21,610 INFO L231 Difference]: Finished difference. Result has 333 places, 1090 transitions, 19130 flow [2024-11-28 03:03:21,611 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18527, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=19130, PETRI_PLACES=333, PETRI_TRANSITIONS=1090} [2024-11-28 03:03:21,611 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 304 predicate places. [2024-11-28 03:03:21,611 INFO L471 AbstractCegarLoop]: Abstraction has has 333 places, 1090 transitions, 19130 flow [2024-11-28 03:03:21,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.95) internal successors, (119), 20 states have internal predecessors, (119), 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) [2024-11-28 03:03:21,612 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:21,612 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:21,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 03:03:21,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-28 03:03:21,812 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:03:21,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:21,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1957158488, now seen corresponding path program 14 times [2024-11-28 03:03:21,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:21,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45578174] [2024-11-28 03:03:21,813 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:21,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:21,822 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:21,822 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:21,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:21,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45578174] [2024-11-28 03:03:21,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45578174] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:21,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755815606] [2024-11-28 03:03:21,956 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:21,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:21,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:21,960 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:21,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 03:03:22,076 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:22,077 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:22,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:03:22,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:22,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:22,189 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:22,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755815606] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:22,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:22,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-28 03:03:22,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906354323] [2024-11-28 03:03:22,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:22,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:03:22,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:22,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:03:22,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:03:22,312 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:03:22,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1090 transitions, 19130 flow. Second operand has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:22,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:22,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:03:22,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:24,995 INFO L124 PetriNetUnfolderBase]: 5407/7930 cut-off events. [2024-11-28 03:03:24,996 INFO L125 PetriNetUnfolderBase]: For 133415/133415 co-relation queries the response was YES. [2024-11-28 03:03:25,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68272 conditions, 7930 events. 5407/7930 cut-off events. For 133415/133415 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 43090 event pairs, 509 based on Foata normal form. 23/7953 useless extension candidates. Maximal degree in co-relation 68152. Up to 2644 conditions per place. [2024-11-28 03:03:25,134 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 702 selfloop transitions, 460 changer transitions 0/1163 dead transitions. [2024-11-28 03:03:25,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1163 transitions, 22446 flow [2024-11-28 03:03:25,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:03:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:03:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-11-28 03:03:25,135 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2024-11-28 03:03:25,135 INFO L175 Difference]: Start difference. First operand has 333 places, 1090 transitions, 19130 flow. Second operand 10 states and 104 transitions. [2024-11-28 03:03:25,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1163 transitions, 22446 flow [2024-11-28 03:03:26,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1163 transitions, 21919 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-11-28 03:03:27,025 INFO L231 Difference]: Finished difference. Result has 334 places, 1084 transitions, 19474 flow [2024-11-28 03:03:27,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18508, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19474, PETRI_PLACES=334, PETRI_TRANSITIONS=1084} [2024-11-28 03:03:27,027 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 305 predicate places. [2024-11-28 03:03:27,027 INFO L471 AbstractCegarLoop]: Abstraction has has 334 places, 1084 transitions, 19474 flow [2024-11-28 03:03:27,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.105263157894737) internal successors, (116), 19 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:27,027 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:27,027 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:27,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-28 03:03:27,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-28 03:03:27,232 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:03:27,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:27,233 INFO L85 PathProgramCache]: Analyzing trace with hash -799614478, now seen corresponding path program 15 times [2024-11-28 03:03:27,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:27,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869543299] [2024-11-28 03:03:27,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:03:27,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:27,243 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:03:27,243 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:27,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:27,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869543299] [2024-11-28 03:03:27,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869543299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:27,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032614391] [2024-11-28 03:03:27,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:03:27,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:27,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:27,358 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:27,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 03:03:27,470 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:03:27,471 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:27,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:03:27,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:27,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:27,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032614391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:27,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:27,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-28 03:03:27,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162081108] [2024-11-28 03:03:27,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:27,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 03:03:27,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:27,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 03:03:27,749 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2024-11-28 03:03:27,750 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:03:27,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 1084 transitions, 19474 flow. Second operand has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:27,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:27,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:03:27,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:30,627 INFO L124 PetriNetUnfolderBase]: 5362/7849 cut-off events. [2024-11-28 03:03:30,627 INFO L125 PetriNetUnfolderBase]: For 134453/134453 co-relation queries the response was YES. [2024-11-28 03:03:30,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68738 conditions, 7849 events. 5362/7849 cut-off events. For 134453/134453 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 42414 event pairs, 398 based on Foata normal form. 30/7879 useless extension candidates. Maximal degree in co-relation 68617. Up to 2630 conditions per place. [2024-11-28 03:03:30,811 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 646 selfloop transitions, 582 changer transitions 0/1229 dead transitions. [2024-11-28 03:03:30,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1229 transitions, 23817 flow [2024-11-28 03:03:30,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:03:30,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:03:30,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 204 transitions. [2024-11-28 03:03:30,813 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2024-11-28 03:03:30,813 INFO L175 Difference]: Start difference. First operand has 334 places, 1084 transitions, 19474 flow. Second operand 18 states and 204 transitions. [2024-11-28 03:03:30,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1229 transitions, 23817 flow [2024-11-28 03:03:32,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1229 transitions, 23045 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-28 03:03:32,975 INFO L231 Difference]: Finished difference. Result has 343 places, 1073 transitions, 19712 flow [2024-11-28 03:03:32,976 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18548, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=19712, PETRI_PLACES=343, PETRI_TRANSITIONS=1073} [2024-11-28 03:03:32,976 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 314 predicate places. [2024-11-28 03:03:32,976 INFO L471 AbstractCegarLoop]: Abstraction has has 343 places, 1073 transitions, 19712 flow [2024-11-28 03:03:32,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.857142857142857) internal successors, (123), 21 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:32,977 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:32,977 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:33,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 03:03:33,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-28 03:03:33,177 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:03:33,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:33,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1394272188, now seen corresponding path program 16 times [2024-11-28 03:03:33,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:33,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156195980] [2024-11-28 03:03:33,178 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:03:33,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:33,187 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:03:33,187 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:03:33,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:33,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156195980] [2024-11-28 03:03:33,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156195980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:33,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229253891] [2024-11-28 03:03:33,261 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:03:33,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:33,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:33,263 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:33,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 03:03:33,368 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:03:33,368 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:33,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:03:33,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:03:33,454 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:03:33,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229253891] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:33,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:33,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-11-28 03:03:33,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047672079] [2024-11-28 03:03:33,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:33,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 03:03:33,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:33,534 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 03:03:33,534 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-28 03:03:33,534 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:03:33,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1073 transitions, 19712 flow. Second operand has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 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) [2024-11-28 03:03:33,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:33,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:03:33,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:36,422 INFO L124 PetriNetUnfolderBase]: 5378/7877 cut-off events. [2024-11-28 03:03:36,422 INFO L125 PetriNetUnfolderBase]: For 134622/134622 co-relation queries the response was YES. [2024-11-28 03:03:36,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70167 conditions, 7877 events. 5378/7877 cut-off events. For 134622/134622 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 42707 event pairs, 338 based on Foata normal form. 12/7889 useless extension candidates. Maximal degree in co-relation 70046. Up to 2646 conditions per place. [2024-11-28 03:03:36,586 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 891 selfloop transitions, 386 changer transitions 0/1278 dead transitions. [2024-11-28 03:03:36,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1278 transitions, 25186 flow [2024-11-28 03:03:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-28 03:03:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-28 03:03:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 208 transitions. [2024-11-28 03:03:36,587 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4279835390946502 [2024-11-28 03:03:36,587 INFO L175 Difference]: Start difference. First operand has 343 places, 1073 transitions, 19712 flow. Second operand 18 states and 208 transitions. [2024-11-28 03:03:36,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1278 transitions, 25186 flow [2024-11-28 03:03:38,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1278 transitions, 23816 flow, removed 0 selfloop flow, removed 17 redundant places. [2024-11-28 03:03:38,439 INFO L231 Difference]: Finished difference. Result has 351 places, 1086 transitions, 19680 flow [2024-11-28 03:03:38,440 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18516, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=19680, PETRI_PLACES=351, PETRI_TRANSITIONS=1086} [2024-11-28 03:03:38,440 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 322 predicate places. [2024-11-28 03:03:38,441 INFO L471 AbstractCegarLoop]: Abstraction has has 351 places, 1086 transitions, 19680 flow [2024-11-28 03:03:38,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.066666666666666) internal successors, (91), 15 states have internal predecessors, (91), 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) [2024-11-28 03:03:38,441 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:38,441 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:38,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-28 03:03:38,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-28 03:03:38,645 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:03:38,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:38,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1184019091, now seen corresponding path program 14 times [2024-11-28 03:03:38,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:38,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100685483] [2024-11-28 03:03:38,646 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:38,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:38,656 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:38,656 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:38,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:38,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100685483] [2024-11-28 03:03:38,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100685483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:38,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460960708] [2024-11-28 03:03:38,760 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:38,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:38,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:38,762 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:38,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 03:03:38,870 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:38,870 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:38,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 03:03:38,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:38,978 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:39,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460960708] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:39,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:39,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-11-28 03:03:39,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143185716] [2024-11-28 03:03:39,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:39,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:03:39,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:39,086 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:03:39,086 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:03:39,086 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:03:39,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1086 transitions, 19680 flow. Second operand has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:39,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:39,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:03:39,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:41,930 INFO L124 PetriNetUnfolderBase]: 5327/7772 cut-off events. [2024-11-28 03:03:41,930 INFO L125 PetriNetUnfolderBase]: For 137516/137516 co-relation queries the response was YES. [2024-11-28 03:03:42,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69259 conditions, 7772 events. 5327/7772 cut-off events. For 137516/137516 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 41595 event pairs, 914 based on Foata normal form. 38/7810 useless extension candidates. Maximal degree in co-relation 69130. Up to 4675 conditions per place. [2024-11-28 03:03:42,089 INFO L140 encePairwiseOnDemand]: 18/27 looper letters, 744 selfloop transitions, 390 changer transitions 0/1135 dead transitions. [2024-11-28 03:03:42,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1135 transitions, 22510 flow [2024-11-28 03:03:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 03:03:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-28 03:03:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 99 transitions. [2024-11-28 03:03:42,092 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-11-28 03:03:42,092 INFO L175 Difference]: Start difference. First operand has 351 places, 1086 transitions, 19680 flow. Second operand 10 states and 99 transitions. [2024-11-28 03:03:42,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1135 transitions, 22510 flow [2024-11-28 03:03:43,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 1135 transitions, 21817 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-11-28 03:03:43,965 INFO L231 Difference]: Finished difference. Result has 354 places, 1079 transitions, 19703 flow [2024-11-28 03:03:43,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18923, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19703, PETRI_PLACES=354, PETRI_TRANSITIONS=1079} [2024-11-28 03:03:43,966 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 325 predicate places. [2024-11-28 03:03:43,966 INFO L471 AbstractCegarLoop]: Abstraction has has 354 places, 1079 transitions, 19703 flow [2024-11-28 03:03:43,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.052631578947368) internal successors, (115), 19 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 03:03:43,966 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:43,966 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:43,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-28 03:03:44,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-28 03:03:44,167 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:03:44,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:44,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1420445512, now seen corresponding path program 17 times [2024-11-28 03:03:44,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:44,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13249849] [2024-11-28 03:03:44,168 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:03:44,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:44,178 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:44,178 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 03:03:44,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:44,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13249849] [2024-11-28 03:03:44,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13249849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:44,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99546697] [2024-11-28 03:03:44,266 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 03:03:44,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:44,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:44,268 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:44,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 03:03:44,389 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:44,389 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:44,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 03:03:44,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:03:44,530 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:03:44,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99546697] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:44,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:44,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-28 03:03:44,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490595712] [2024-11-28 03:03:44,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:44,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 03:03:44,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:44,651 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 03:03:44,651 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-28 03:03:44,651 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:03:44,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1079 transitions, 19703 flow. Second operand has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 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) [2024-11-28 03:03:44,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:44,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:03:44,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:03:48,679 INFO L124 PetriNetUnfolderBase]: 5582/8148 cut-off events. [2024-11-28 03:03:48,679 INFO L125 PetriNetUnfolderBase]: For 144678/144678 co-relation queries the response was YES. [2024-11-28 03:03:48,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72841 conditions, 8148 events. 5582/8148 cut-off events. For 144678/144678 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 44378 event pairs, 421 based on Foata normal form. 52/8200 useless extension candidates. Maximal degree in co-relation 72712. Up to 2780 conditions per place. [2024-11-28 03:03:48,841 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 587 selfloop transitions, 792 changer transitions 0/1380 dead transitions. [2024-11-28 03:03:48,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1380 transitions, 26532 flow [2024-11-28 03:03:48,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 03:03:48,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-11-28 03:03:48,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 425 transitions. [2024-11-28 03:03:48,842 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3497942386831276 [2024-11-28 03:03:48,843 INFO L175 Difference]: Start difference. First operand has 354 places, 1079 transitions, 19703 flow. Second operand 45 states and 425 transitions. [2024-11-28 03:03:48,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1380 transitions, 26532 flow [2024-11-28 03:03:50,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1380 transitions, 25541 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-11-28 03:03:50,933 INFO L231 Difference]: Finished difference. Result has 403 places, 1169 transitions, 22468 flow [2024-11-28 03:03:50,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=18784, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1077, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=703, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=22468, PETRI_PLACES=403, PETRI_TRANSITIONS=1169} [2024-11-28 03:03:50,935 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 374 predicate places. [2024-11-28 03:03:50,935 INFO L471 AbstractCegarLoop]: Abstraction has has 403 places, 1169 transitions, 22468 flow [2024-11-28 03:03:50,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.368421052631579) internal successors, (121), 19 states have internal predecessors, (121), 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) [2024-11-28 03:03:50,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:03:50,935 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:03:50,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-28 03:03:51,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-28 03:03:51,136 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:03:51,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:03:51,136 INFO L85 PathProgramCache]: Analyzing trace with hash -2135070989, now seen corresponding path program 8 times [2024-11-28 03:03:51,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:03:51,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619785813] [2024-11-28 03:03:51,136 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:51,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:03:51,173 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:51,173 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:52,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:03:52,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619785813] [2024-11-28 03:03:52,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619785813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:03:52,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906911997] [2024-11-28 03:03:52,054 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 03:03:52,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:03:52,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:03:52,059 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:03:52,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 03:03:52,209 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 03:03:52,209 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:03:52,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 03:03:52,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:03:52,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:03:53,004 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:03:53,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2024-11-28 03:03:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:53,277 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:03:54,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2024-11-28 03:03:54,664 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:03:54,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 242 treesize of output 202 [2024-11-28 03:03:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:03:58,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906911997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:03:58,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:03:58,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 39 [2024-11-28 03:03:58,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717559956] [2024-11-28 03:03:58,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:03:58,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 03:03:58,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:03:58,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 03:03:58,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1388, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 03:03:58,009 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:03:58,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 1169 transitions, 22468 flow. Second operand has 40 states, 40 states have (on average 5.8) internal successors, (232), 40 states have internal predecessors, (232), 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) [2024-11-28 03:03:58,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:03:58,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:03:58,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:04:11,782 INFO L124 PetriNetUnfolderBase]: 9108/13382 cut-off events. [2024-11-28 03:04:11,782 INFO L125 PetriNetUnfolderBase]: For 295967/295967 co-relation queries the response was YES. [2024-11-28 03:04:12,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131416 conditions, 13382 events. 9108/13382 cut-off events. For 295967/295967 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 80084 event pairs, 378 based on Foata normal form. 5/13387 useless extension candidates. Maximal degree in co-relation 131273. Up to 9416 conditions per place. [2024-11-28 03:04:12,225 INFO L140 encePairwiseOnDemand]: 15/27 looper letters, 1526 selfloop transitions, 1054 changer transitions 18/2599 dead transitions. [2024-11-28 03:04:12,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 2599 transitions, 56046 flow [2024-11-28 03:04:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-28 03:04:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2024-11-28 03:04:12,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 727 transitions. [2024-11-28 03:04:12,227 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42739564961787185 [2024-11-28 03:04:12,227 INFO L175 Difference]: Start difference. First operand has 403 places, 1169 transitions, 22468 flow. Second operand 63 states and 727 transitions. [2024-11-28 03:04:12,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 2599 transitions, 56046 flow [2024-11-28 03:04:19,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2599 transitions, 54227 flow, removed 367 selfloop flow, removed 12 redundant places. [2024-11-28 03:04:19,518 INFO L231 Difference]: Finished difference. Result has 473 places, 2013 transitions, 43317 flow [2024-11-28 03:04:19,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=21596, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=43317, PETRI_PLACES=473, PETRI_TRANSITIONS=2013} [2024-11-28 03:04:19,519 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 444 predicate places. [2024-11-28 03:04:19,519 INFO L471 AbstractCegarLoop]: Abstraction has has 473 places, 2013 transitions, 43317 flow [2024-11-28 03:04:19,519 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.8) internal successors, (232), 40 states have internal predecessors, (232), 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) [2024-11-28 03:04:19,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:04:19,519 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:04:19,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-28 03:04:19,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:19,720 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:04:19,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:04:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash 706928499, now seen corresponding path program 9 times [2024-11-28 03:04:19,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:04:19,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900690616] [2024-11-28 03:04:19,721 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:04:19,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:04:19,744 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:04:19,744 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:20,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:04:20,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900690616] [2024-11-28 03:04:20,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900690616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:04:20,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168439619] [2024-11-28 03:04:20,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 03:04:20,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:04:20,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:04:20,772 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:04:20,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-28 03:04:20,909 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-28 03:04:20,909 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:04:20,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 03:04:20,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:04:21,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:04:21,576 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:04:21,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2024-11-28 03:04:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:04:21,715 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:04:22,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2024-11-28 03:04:22,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:04:22,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 218 [2024-11-28 03:04:50,562 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:05:41,912 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:05:42,136 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:05:45,616 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:06:01,344 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:06:03,147 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:06:03,190 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:06:19,978 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:06:20,473 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:06:43,661 WARN L286 SmtUtils]: Spent 7.05s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-28 03:06:53,520 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:11:07,839 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:11:15,101 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:11:20,383 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-28 03:11:22,008 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-28 03:11:22,686 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:11:23,043 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-28 03:13:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:13:13,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168439619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 03:13:13,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 03:13:13,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2024-11-28 03:13:13,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958215914] [2024-11-28 03:13:13,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 03:13:13,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 03:13:13,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 03:13:13,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 03:13:13,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 03:13:13,907 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2024-11-28 03:13:13,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 2013 transitions, 43317 flow. Second operand has 35 states, 35 states have (on average 5.942857142857143) internal successors, (208), 35 states have internal predecessors, (208), 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) [2024-11-28 03:13:13,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 03:13:13,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2024-11-28 03:13:13,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 03:13:29,735 INFO L124 PetriNetUnfolderBase]: 10162/14973 cut-off events. [2024-11-28 03:13:29,736 INFO L125 PetriNetUnfolderBase]: For 358005/358005 co-relation queries the response was YES. [2024-11-28 03:13:30,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152168 conditions, 14973 events. 10162/14973 cut-off events. For 358005/358005 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 91454 event pairs, 421 based on Foata normal form. 8/14981 useless extension candidates. Maximal degree in co-relation 152007. Up to 10909 conditions per place. [2024-11-28 03:13:30,323 INFO L140 encePairwiseOnDemand]: 14/27 looper letters, 1716 selfloop transitions, 946 changer transitions 8/2671 dead transitions. [2024-11-28 03:13:30,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 2671 transitions, 60619 flow [2024-11-28 03:13:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 03:13:30,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-28 03:13:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 417 transitions. [2024-11-28 03:13:30,327 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.468013468013468 [2024-11-28 03:13:30,327 INFO L175 Difference]: Start difference. First operand has 473 places, 2013 transitions, 43317 flow. Second operand 33 states and 417 transitions. [2024-11-28 03:13:30,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 2671 transitions, 60619 flow [2024-11-28 03:13:40,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 2671 transitions, 55903 flow, removed 2132 selfloop flow, removed 8 redundant places. [2024-11-28 03:13:40,146 INFO L231 Difference]: Finished difference. Result has 507 places, 2227 transitions, 45927 flow [2024-11-28 03:13:40,148 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=39086, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=749, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=45927, PETRI_PLACES=507, PETRI_TRANSITIONS=2227} [2024-11-28 03:13:40,153 INFO L279 CegarLoopForPetriNet]: 29 programPoint places, 478 predicate places. [2024-11-28 03:13:40,153 INFO L471 AbstractCegarLoop]: Abstraction has has 507 places, 2227 transitions, 45927 flow [2024-11-28 03:13:40,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.942857142857143) internal successors, (208), 35 states have internal predecessors, (208), 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) [2024-11-28 03:13:40,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 03:13:40,154 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 03:13:40,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-28 03:13:40,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-11-28 03:13:40,355 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-11-28 03:13:40,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 03:13:40,357 INFO L85 PathProgramCache]: Analyzing trace with hash 671313285, now seen corresponding path program 10 times [2024-11-28 03:13:40,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 03:13:40,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848422214] [2024-11-28 03:13:40,358 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:13:40,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 03:13:40,528 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:13:40,528 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:13:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 03:13:41,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 03:13:41,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848422214] [2024-11-28 03:13:41,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848422214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 03:13:41,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938036025] [2024-11-28 03:13:41,680 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 03:13:41,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 03:13:41,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 03:13:41,683 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 03:13:41,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2074b0a0-b227-464d-a59f-733b9016557e/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-28 03:13:41,876 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 03:13:41,876 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 03:13:41,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-28 03:13:41,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 03:13:42,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-28 03:13:42,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 03:13:42,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2024-11-28 03:13:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 03:13:42,836 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 03:13:43,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2024-11-28 03:13:43,750 INFO L349 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2024-11-28 03:13:43,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 262 treesize of output 210