./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/chl-node-symm.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_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/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_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/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_fe941ca1-19ee-443d-a094-77529e962a8a/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 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:51:56,369 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:51:56,457 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:51:56,468 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:51:56,468 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:51:56,506 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:51:56,508 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:51:56,508 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:51:56,508 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:51:56,509 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:51:56,509 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:51:56,509 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:51:56,509 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:51:56,509 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:51:56,510 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:51:56,510 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:51:56,510 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:51:56,510 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:51:56,510 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:51:56,510 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:51:56,510 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:51:56,510 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:51:56,511 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:51:56,511 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:51:56,511 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:51:56,511 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:51:56,511 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:51:56,511 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:51:56,511 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:51:56,513 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:51:56,513 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:51:56,513 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:51:56,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:51:56,514 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:51:56,514 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:51:56,514 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:51:56,514 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:51:56,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:51:56,514 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:51:56,514 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:51:56,514 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:51:56,514 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:51:56,515 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:51:56,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:51:56,515 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:51:56,515 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:51:56,515 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:51:56,515 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:51:56,515 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_fe941ca1-19ee-443d-a094-77529e962a8a/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 -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2024-11-28 04:51:56,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:51:56,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:51:56,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:51:56,800 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:51:56,800 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:51:56,801 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2024-11-28 04:51:59,804 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/data/6e8f17161/35ca1ef649064f26a90c73a075d3878b/FLAGfbb865b6e [2024-11-28 04:52:00,090 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:52:00,091 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2024-11-28 04:52:00,112 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/data/6e8f17161/35ca1ef649064f26a90c73a075d3878b/FLAGfbb865b6e [2024-11-28 04:52:00,130 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/data/6e8f17161/35ca1ef649064f26a90c73a075d3878b [2024-11-28 04:52:00,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:52:00,134 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:52:00,135 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:52:00,136 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:52:00,140 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:52:00,141 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,142 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61a08fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00, skipping insertion in model container [2024-11-28 04:52:00,142 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,163 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:52:00,347 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_fe941ca1-19ee-443d-a094-77529e962a8a/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3331,3344] [2024-11-28 04:52:00,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:52:00,389 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:52:00,424 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_fe941ca1-19ee-443d-a094-77529e962a8a/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3331,3344] [2024-11-28 04:52:00,431 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:52:00,447 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:52:00,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00 WrapperNode [2024-11-28 04:52:00,448 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:52:00,449 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:52:00,449 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:52:00,449 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:52:00,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,469 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,497 INFO L138 Inliner]: procedures = 25, calls = 40, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 285 [2024-11-28 04:52:00,497 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:52:00,498 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:52:00,498 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:52:00,498 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:52:00,510 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,511 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,519 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,546 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 6, 10]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2024-11-28 04:52:00,550 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,551 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,563 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,568 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,573 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,576 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,579 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:52:00,579 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:52:00,580 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:52:00,580 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:52:00,581 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (1/1) ... [2024-11-28 04:52:00,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:52:00,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:00,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:52:00,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:52:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:52:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 04:52:00,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 04:52:00,653 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 04:52:00,653 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 04:52:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:52:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:52:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 04:52:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:52:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:52:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 04:52:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:52:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:52:00,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:52:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:52:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:52:00,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 04:52:00,656 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 04:52:00,782 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:52:00,783 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:52:01,356 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 04:52:01,356 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:52:01,943 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:52:01,943 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 04:52:01,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:52:01 BoogieIcfgContainer [2024-11-28 04:52:01,943 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:52:01,946 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:52:01,946 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:52:01,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:52:01,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:52:00" (1/3) ... [2024-11-28 04:52:01,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@acb28c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:52:01, skipping insertion in model container [2024-11-28 04:52:01,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:52:00" (2/3) ... [2024-11-28 04:52:01,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@acb28c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:52:01, skipping insertion in model container [2024-11-28 04:52:01,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:52:01" (3/3) ... [2024-11-28 04:52:01,955 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2024-11-28 04:52:01,973 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:52:01,975 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-node-symm.wvr.c that has 3 procedures, 19 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-28 04:52:01,975 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 04:52:02,073 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-28 04:52:02,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 22 transitions, 58 flow [2024-11-28 04:52:02,156 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2024-11-28 04:52:02,160 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 04:52:02,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 4/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 14. Up to 2 conditions per place. [2024-11-28 04:52:02,163 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 22 transitions, 58 flow [2024-11-28 04:52:02,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 19 transitions, 50 flow [2024-11-28 04:52:02,183 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:52:02,199 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;@769ec207, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:52:02,200 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-28 04:52:02,219 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 04:52:02,219 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2024-11-28 04:52:02,219 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 04:52:02,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:02,220 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:02,220 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:52:02,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:02,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1877569075, now seen corresponding path program 1 times [2024-11-28 04:52:02,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:02,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879859380] [2024-11-28 04:52:02,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:02,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:02,911 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 04:52:02,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:02,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879859380] [2024-11-28 04:52:02,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879859380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:02,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:02,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:52:02,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013615455] [2024-11-28 04:52:02,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:02,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:52:02,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:02,946 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:52:02,946 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:52:02,947 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 04:52:02,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 04:52:02,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:02,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 04:52:02,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:03,052 INFO L124 PetriNetUnfolderBase]: 12/35 cut-off events. [2024-11-28 04:52:03,053 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-28 04:52:03,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 35 events. 12/35 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 8 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 40. Up to 34 conditions per place. [2024-11-28 04:52:03,054 INFO L140 encePairwiseOnDemand]: 19/22 looper letters, 17 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2024-11-28 04:52:03,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 90 flow [2024-11-28 04:52:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:52:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 04:52:03,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 29 transitions. [2024-11-28 04:52:03,094 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-11-28 04:52:03,097 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 29 transitions. [2024-11-28 04:52:03,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 90 flow [2024-11-28 04:52:03,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 20 transitions, 82 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-28 04:52:03,107 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 54 flow [2024-11-28 04:52:03,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2024-11-28 04:52:03,116 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-11-28 04:52:03,116 INFO L471 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 54 flow [2024-11-28 04:52:03,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 04:52:03,117 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:03,117 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:03,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:52:03,117 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:52:03,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:03,118 INFO L85 PathProgramCache]: Analyzing trace with hash -121511108, now seen corresponding path program 1 times [2024-11-28 04:52:03,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:03,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091852044] [2024-11-28 04:52:03,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:03,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:03,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:52:03,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:03,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091852044] [2024-11-28 04:52:03,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091852044] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:03,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:03,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:52:03,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077294867] [2024-11-28 04:52:03,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:03,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:52:03,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:03,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:52:03,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:52:03,480 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 04:52:03,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:52:03,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:03,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 04:52:03,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:03,598 INFO L124 PetriNetUnfolderBase]: 12/36 cut-off events. [2024-11-28 04:52:03,599 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 04:52:03,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 36 events. 12/36 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 8 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 72. Up to 33 conditions per place. [2024-11-28 04:52:03,601 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2024-11-28 04:52:03,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 96 flow [2024-11-28 04:52:03,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:52:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:52:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2024-11-28 04:52:03,603 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-11-28 04:52:03,603 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 54 flow. Second operand 4 states and 33 transitions. [2024-11-28 04:52:03,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 96 flow [2024-11-28 04:52:03,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 92 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-28 04:52:03,605 INFO L231 Difference]: Finished difference. Result has 24 places, 21 transitions, 68 flow [2024-11-28 04:52:03,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2024-11-28 04:52:03,606 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 2 predicate places. [2024-11-28 04:52:03,606 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 68 flow [2024-11-28 04:52:03,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:52:03,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:03,607 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:03,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:52:03,607 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:52:03,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:03,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1876859753, now seen corresponding path program 1 times [2024-11-28 04:52:03,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:03,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709299061] [2024-11-28 04:52:03,608 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:03,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:04,041 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 04:52:04,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:04,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709299061] [2024-11-28 04:52:04,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709299061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:04,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663577043] [2024-11-28 04:52:04,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:04,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:04,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:04,048 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:04,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:52:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:04,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:52:04,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:04,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 04:52:04,295 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:52:04,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663577043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:04,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:52:04,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-28 04:52:04,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912149348] [2024-11-28 04:52:04,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:04,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:52:04,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:04,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:52:04,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:52:04,297 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 04:52:04,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:52:04,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:04,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 04:52:04,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:04,413 INFO L124 PetriNetUnfolderBase]: 12/37 cut-off events. [2024-11-28 04:52:04,413 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-28 04:52:04,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92 conditions, 37 events. 12/37 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 8 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 72. Up to 35 conditions per place. [2024-11-28 04:52:04,416 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 18 selfloop transitions, 3 changer transitions 0/22 dead transitions. [2024-11-28 04:52:04,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 22 transitions, 112 flow [2024-11-28 04:52:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:52:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:52:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 32 transitions. [2024-11-28 04:52:04,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-28 04:52:04,418 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 68 flow. Second operand 4 states and 32 transitions. [2024-11-28 04:52:04,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 22 transitions, 112 flow [2024-11-28 04:52:04,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 22 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:52:04,419 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 81 flow [2024-11-28 04:52:04,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=81, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2024-11-28 04:52:04,420 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2024-11-28 04:52:04,420 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 81 flow [2024-11-28 04:52:04,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:52:04,422 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:04,423 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:04,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:52:04,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:04,624 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:52:04,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:04,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1137434626, now seen corresponding path program 1 times [2024-11-28 04:52:04,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:04,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606422256] [2024-11-28 04:52:04,625 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:04,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-28 04:52:04,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:04,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606422256] [2024-11-28 04:52:04,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606422256] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:04,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:04,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:52:04,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335627421] [2024-11-28 04:52:04,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:04,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:52:04,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:04,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:52:04,901 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:52:04,901 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 04:52:04,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 81 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:52:04,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:04,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 04:52:04,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:05,018 INFO L124 PetriNetUnfolderBase]: 12/38 cut-off events. [2024-11-28 04:52:05,018 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-28 04:52:05,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 38 events. 12/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 8 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 79. Up to 36 conditions per place. [2024-11-28 04:52:05,019 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2024-11-28 04:52:05,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 127 flow [2024-11-28 04:52:05,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:52:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:52:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 32 transitions. [2024-11-28 04:52:05,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-11-28 04:52:05,020 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 81 flow. Second operand 4 states and 32 transitions. [2024-11-28 04:52:05,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 127 flow [2024-11-28 04:52:05,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 121 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-28 04:52:05,022 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 89 flow [2024-11-28 04:52:05,022 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-11-28 04:52:05,023 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 7 predicate places. [2024-11-28 04:52:05,023 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 89 flow [2024-11-28 04:52:05,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:52:05,023 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:05,023 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 04:52:05,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 04:52:05,025 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:52:05,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash -216062681, now seen corresponding path program 1 times [2024-11-28 04:52:05,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:05,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735298253] [2024-11-28 04:52:05,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:52:05,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:52:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:52:07,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:07,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735298253] [2024-11-28 04:52:07,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735298253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:07,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:07,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:52:07,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942097900] [2024-11-28 04:52:07,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:07,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:52:07,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:07,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:52:07,167 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:52:07,167 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 04:52:07,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 89 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:52:07,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:07,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 04:52:07,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:07,350 INFO L124 PetriNetUnfolderBase]: 11/41 cut-off events. [2024-11-28 04:52:07,350 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-28 04:52:07,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 41 events. 11/41 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 55 event pairs, 1 based on Foata normal form. 1/41 useless extension candidates. Maximal degree in co-relation 88. Up to 21 conditions per place. [2024-11-28 04:52:07,352 INFO L140 encePairwiseOnDemand]: 19/22 looper letters, 22 selfloop transitions, 1 changer transitions 6/30 dead transitions. [2024-11-28 04:52:07,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 164 flow [2024-11-28 04:52:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:52:07,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:52:07,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2024-11-28 04:52:07,355 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-28 04:52:07,356 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 89 flow. Second operand 4 states and 38 transitions. [2024-11-28 04:52:07,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 164 flow [2024-11-28 04:52:07,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 158 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-28 04:52:07,357 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 90 flow [2024-11-28 04:52:07,357 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2024-11-28 04:52:07,358 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2024-11-28 04:52:07,358 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 90 flow [2024-11-28 04:52:07,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:52:07,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 04:52:07,361 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 04:52:07,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 04:52:07,361 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-28 04:52:07,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:07,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1057935209, now seen corresponding path program 2 times [2024-11-28 04:52:07,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:07,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156497898] [2024-11-28 04:52:07,362 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:52:07,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:07,438 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:52:07,438 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 04:52:08,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:08,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156497898] [2024-11-28 04:52:08,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156497898] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:52:08,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:52:08,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:52:08,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185286819] [2024-11-28 04:52:08,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:52:08,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:52:08,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:08,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:52:08,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:52:08,637 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-28 04:52:08,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:52:08,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 04:52:08,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-28 04:52:08,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 04:52:08,799 INFO L124 PetriNetUnfolderBase]: 9/33 cut-off events. [2024-11-28 04:52:08,799 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-28 04:52:08,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 33 events. 9/33 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 27 event pairs, 3 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 94. Up to 26 conditions per place. [2024-11-28 04:52:08,799 INFO L140 encePairwiseOnDemand]: 19/22 looper letters, 0 selfloop transitions, 0 changer transitions 25/25 dead transitions. [2024-11-28 04:52:08,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 146 flow [2024-11-28 04:52:08,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:52:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-28 04:52:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 34 transitions. [2024-11-28 04:52:08,801 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-11-28 04:52:08,801 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 90 flow. Second operand 4 states and 34 transitions. [2024-11-28 04:52:08,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 146 flow [2024-11-28 04:52:08,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-28 04:52:08,803 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2024-11-28 04:52:08,803 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2024-11-28 04:52:08,803 INFO L279 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2024-11-28 04:52:08,803 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2024-11-28 04:52:08,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:52:08,809 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2024-11-28 04:52:08,809 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2024-11-28 04:52:08,809 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-11-28 04:52:08,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-28 04:52:08,810 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2024-11-28 04:52:08,814 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-11-28 04:52:08,814 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 04:52:08,819 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:52:08 BasicIcfg [2024-11-28 04:52:08,819 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 04:52:08,820 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 04:52:08,820 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 04:52:08,820 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 04:52:08,821 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:52:01" (3/4) ... [2024-11-28 04:52:08,823 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-28 04:52:08,841 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2024-11-28 04:52:08,841 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2024-11-28 04:52:08,852 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 222 nodes and edges [2024-11-28 04:52:08,853 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2024-11-28 04:52:08,853 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-28 04:52:08,854 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-28 04:52:08,957 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 04:52:08,958 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 04:52:08,958 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 04:52:08,959 INFO L158 Benchmark]: Toolchain (without parser) took 8824.39ms. Allocated memory was 142.6MB in the beginning and 520.1MB in the end (delta: 377.5MB). Free memory was 119.0MB in the beginning and 480.0MB in the end (delta: -361.0MB). Peak memory consumption was 255.3MB. Max. memory is 16.1GB. [2024-11-28 04:52:08,960 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 142.6MB. Free memory is still 80.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:52:08,960 INFO L158 Benchmark]: CACSL2BoogieTranslator took 312.92ms. Allocated memory is still 142.6MB. Free memory was 118.8MB in the beginning and 106.0MB in the end (delta: 12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:52:08,961 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.28ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 103.6MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:52:08,961 INFO L158 Benchmark]: Boogie Preprocessor took 81.07ms. Allocated memory is still 142.6MB. Free memory was 103.6MB in the beginning and 100.9MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:52:08,965 INFO L158 Benchmark]: RCFGBuilder took 1363.88ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 55.1MB in the end (delta: 45.6MB). Peak memory consumption was 47.3MB. Max. memory is 16.1GB. [2024-11-28 04:52:08,965 INFO L158 Benchmark]: TraceAbstraction took 6873.22ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 54.5MB in the beginning and 151.4MB in the end (delta: -96.9MB). Peak memory consumption was 182.8MB. Max. memory is 16.1GB. [2024-11-28 04:52:08,965 INFO L158 Benchmark]: Witness Printer took 137.66ms. Allocated memory was 427.8MB in the beginning and 520.1MB in the end (delta: 92.3MB). Free memory was 151.4MB in the beginning and 480.0MB in the end (delta: -328.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:52:08,967 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 142.6MB. Free memory is still 80.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 312.92ms. Allocated memory is still 142.6MB. Free memory was 118.8MB in the beginning and 106.0MB in the end (delta: 12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.28ms. Allocated memory is still 142.6MB. Free memory was 105.8MB in the beginning and 103.6MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 81.07ms. Allocated memory is still 142.6MB. Free memory was 103.6MB in the beginning and 100.9MB in the end (delta: 2.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1363.88ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 55.1MB in the end (delta: 45.6MB). Peak memory consumption was 47.3MB. Max. memory is 16.1GB. * TraceAbstraction took 6873.22ms. Allocated memory was 142.6MB in the beginning and 427.8MB in the end (delta: 285.2MB). Free memory was 54.5MB in the beginning and 151.4MB in the end (delta: -96.9MB). Peak memory consumption was 182.8MB. Max. memory is 16.1GB. * Witness Printer took 137.66ms. Allocated memory was 427.8MB in the beginning and 520.1MB in the end (delta: 92.3MB). Free memory was 151.4MB in the beginning and 480.0MB in the end (delta: -328.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 93]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 25 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 6.7s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 56 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 56 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 252 IncrementalHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 0 mSDtfsCounter, 252 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=5, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 121 NumberOfCodeBlocks, 117 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 663 SizeOfPredicates, 2 NumberOfNonLiveVariables, 249 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 7 InterpolantComputations, 6 PerfectInterpolantSequences, 15/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-11-28 04:52:08,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fe941ca1-19ee-443d-a094-77529e962a8a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE