./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d874363f5f49f36a9a30d2c3cc29fd064d32abc557b85cad7937ddf3d715286c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:12:36,346 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:12:36,417 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:12:36,432 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:12:36,433 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:12:36,477 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:12:36,478 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:12:36,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:12:36,479 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:12:36,484 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:12:36,485 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:12:36,486 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:12:36,486 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:12:36,499 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:12:36,499 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:12:36,500 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:12:36,500 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:12:36,501 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:12:36,501 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:12:36,502 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:12:36,502 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:12:36,503 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:12:36,504 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:12:36,505 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:12:36,505 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:12:36,505 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:12:36,506 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:12:36,506 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:12:36,507 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:12:36,507 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:12:36,509 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:12:36,509 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:12:36,509 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:12:36,509 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:12:36,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:12:36,510 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:12:36,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:12:36,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:36,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:12:36,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:12:36,512 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:12:36,512 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:12:36,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:12:36,513 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:12:36,513 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:12:36,513 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:12:36,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:12:36,514 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d874363f5f49f36a9a30d2c3cc29fd064d32abc557b85cad7937ddf3d715286c [2023-11-23 21:12:36,803 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:12:36,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:12:36,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:12:36,831 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:12:36,831 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:12:36,833 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-1.c [2023-11-23 21:12:39,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:12:40,873 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:12:40,874 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-1.c [2023-11-23 21:12:40,945 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/data/d657867fc/99fb540f1e6f408eb82094ae76f5665e/FLAGf10a5971d [2023-11-23 21:12:40,963 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/data/d657867fc/99fb540f1e6f408eb82094ae76f5665e [2023-11-23 21:12:40,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:12:40,971 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:12:40,976 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:40,977 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:12:40,982 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:12:40,986 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:40,987 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@186ac057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:40, skipping insertion in model container [2023-11-23 21:12:40,987 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:40" (1/1) ... [2023-11-23 21:12:41,325 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:12:43,734 WARN L240 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_b6d68dc4-f625-4420-869b-3a060a0454e4/sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-1.c[380323,380336] [2023-11-23 21:12:43,803 WARN L240 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_b6d68dc4-f625-4420-869b-3a060a0454e4/sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-1.c[383339,383352] [2023-11-23 21:12:44,170 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:44,187 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:12:45,455 WARN L240 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_b6d68dc4-f625-4420-869b-3a060a0454e4/sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-1.c[380323,380336] [2023-11-23 21:12:45,461 WARN L240 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_b6d68dc4-f625-4420-869b-3a060a0454e4/sv-benchmarks/c/combinations/Problem05_label45+token_ring.13.cil-1.c[383339,383352] [2023-11-23 21:12:45,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:45,582 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:12:45,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45 WrapperNode [2023-11-23 21:12:45,584 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:45,585 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:45,585 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:12:45,585 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:12:45,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45" (1/1) ... [2023-11-23 21:12:45,749 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45" (1/1) ... [2023-11-23 21:12:46,247 INFO L138 Inliner]: procedures = 70, calls = 81, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 13294 [2023-11-23 21:12:46,247 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:46,248 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:12:46,248 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:12:46,248 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:12:46,260 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45" (1/1) ... [2023-11-23 21:12:46,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45" (1/1) ... [2023-11-23 21:12:46,413 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45" (1/1) ... [2023-11-23 21:12:46,414 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45" (1/1) ... [2023-11-23 21:12:46,719 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45" (1/1) ... [2023-11-23 21:12:46,818 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45" (1/1) ... [2023-11-23 21:12:46,926 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45" (1/1) ... [2023-11-23 21:12:46,948 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45" (1/1) ... [2023-11-23 21:12:47,036 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:12:47,038 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:12:47,038 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:12:47,038 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:12:47,039 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45" (1/1) ... [2023-11-23 21:12:47,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:47,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:47,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:12:47,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:12:47,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:12:47,114 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 21:12:47,115 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 21:12:47,115 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:12:47,115 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:12:47,116 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 21:12:47,116 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 21:12:47,116 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-23 21:12:47,116 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-23 21:12:47,116 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 21:12:47,116 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 21:12:47,116 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 21:12:47,117 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 21:12:47,117 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 21:12:47,118 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 21:12:47,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:12:47,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:12:47,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:12:47,313 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:12:47,316 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:12:57,327 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:13:00,354 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:13:00,354 INFO L309 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-23 21:13:00,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:00 BoogieIcfgContainer [2023-11-23 21:13:00,358 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:13:00,360 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:13:00,361 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:13:00,364 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:13:00,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:12:40" (1/3) ... [2023-11-23 21:13:00,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d286f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:00, skipping insertion in model container [2023-11-23 21:13:00,366 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:45" (2/3) ... [2023-11-23 21:13:00,366 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d286f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:00, skipping insertion in model container [2023-11-23 21:13:00,367 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:00" (3/3) ... [2023-11-23 21:13:00,368 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.13.cil-1.c [2023-11-23 21:13:00,391 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:13:00,392 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:13:00,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:13:00,527 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, 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;@676f081c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:13:00,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:13:00,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 1862 states, 1823 states have (on average 1.9467910038398244) internal successors, (3549), 1828 states have internal predecessors, (3549), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2023-11-23 21:13:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:13:00,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:00,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:00,561 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:00,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:00,567 INFO L85 PathProgramCache]: Analyzing trace with hash 790858594, now seen corresponding path program 1 times [2023-11-23 21:13:00,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:00,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782459816] [2023-11-23 21:13:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:00,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:01,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:01,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782459816] [2023-11-23 21:13:01,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782459816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:01,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:01,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:13:01,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675581711] [2023-11-23 21:13:01,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:01,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:13:01,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:01,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:13:01,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:13:01,432 INFO L87 Difference]: Start difference. First operand has 1862 states, 1823 states have (on average 1.9467910038398244) internal successors, (3549), 1828 states have internal predecessors, (3549), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:13:02,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:02,764 INFO L93 Difference]: Finished difference Result 3919 states and 7545 transitions. [2023-11-23 21:13:02,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:13:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-11-23 21:13:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:02,795 INFO L225 Difference]: With dead ends: 3919 [2023-11-23 21:13:02,796 INFO L226 Difference]: Without dead ends: 2056 [2023-11-23 21:13:02,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:13:02,809 INFO L413 NwaCegarLoop]: 3576 mSDtfsCounter, 3848 mSDsluCounter, 3472 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3848 SdHoareTripleChecker+Valid, 7048 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:02,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3848 Valid, 7048 Invalid, 760 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:13:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2023-11-23 21:13:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 2055. [2023-11-23 21:13:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 1989 states have (on average 1.903469079939668) internal successors, (3786), 1993 states have internal predecessors, (3786), 52 states have call successors, (52), 13 states have call predecessors, (52), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-23 21:13:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3888 transitions. [2023-11-23 21:13:03,008 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3888 transitions. Word has length 71 [2023-11-23 21:13:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:03,009 INFO L495 AbstractCegarLoop]: Abstraction has 2055 states and 3888 transitions. [2023-11-23 21:13:03,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:13:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3888 transitions. [2023-11-23 21:13:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 21:13:03,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:03,029 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:03,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:13:03,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:03,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:03,031 INFO L85 PathProgramCache]: Analyzing trace with hash 500425055, now seen corresponding path program 1 times [2023-11-23 21:13:03,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:03,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636945907] [2023-11-23 21:13:03,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:03,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:03,534 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:13:03,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:03,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636945907] [2023-11-23 21:13:03,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636945907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:03,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723099539] [2023-11-23 21:13:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:03,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:03,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:03,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:03,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:13:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:03,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:13:03,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:13:04,024 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:04,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723099539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:04,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:13:04,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:13:04,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939661703] [2023-11-23 21:13:04,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:04,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:04,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:04,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:04,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:04,029 INFO L87 Difference]: Start difference. First operand 2055 states and 3888 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:04,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:04,670 INFO L93 Difference]: Finished difference Result 2866 states and 5133 transitions. [2023-11-23 21:13:04,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:04,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-11-23 21:13:04,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:04,693 INFO L225 Difference]: With dead ends: 2866 [2023-11-23 21:13:04,693 INFO L226 Difference]: Without dead ends: 2457 [2023-11-23 21:13:04,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:04,698 INFO L413 NwaCegarLoop]: 3387 mSDtfsCounter, 3547 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3547 SdHoareTripleChecker+Valid, 3648 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:04,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3547 Valid, 3648 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:13:04,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2023-11-23 21:13:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2451. [2023-11-23 21:13:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2329 states have (on average 1.841562902533276) internal successors, (4289), 2334 states have internal predecessors, (4289), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-23 21:13:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 4479 transitions. [2023-11-23 21:13:04,827 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 4479 transitions. Word has length 145 [2023-11-23 21:13:04,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:04,828 INFO L495 AbstractCegarLoop]: Abstraction has 2451 states and 4479 transitions. [2023-11-23 21:13:04,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 4479 transitions. [2023-11-23 21:13:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 21:13:04,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:04,835 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:04,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:05,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 21:13:05,058 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:05,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:05,059 INFO L85 PathProgramCache]: Analyzing trace with hash -21955359, now seen corresponding path program 1 times [2023-11-23 21:13:05,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:05,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35076894] [2023-11-23 21:13:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:13:05,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35076894] [2023-11-23 21:13:05,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35076894] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:05,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542846079] [2023-11-23 21:13:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:05,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:05,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:05,489 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:05,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:13:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:05,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:13:05,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:05,822 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-23 21:13:05,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:05,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542846079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:05,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:13:05,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:13:05,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720392324] [2023-11-23 21:13:05,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:05,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:05,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:05,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:05,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:05,825 INFO L87 Difference]: Start difference. First operand 2451 states and 4479 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:06,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:06,449 INFO L93 Difference]: Finished difference Result 4048 states and 6926 transitions. [2023-11-23 21:13:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:06,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-11-23 21:13:06,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:06,476 INFO L225 Difference]: With dead ends: 4048 [2023-11-23 21:13:06,476 INFO L226 Difference]: Without dead ends: 3243 [2023-11-23 21:13:06,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:06,486 INFO L413 NwaCegarLoop]: 3385 mSDtfsCounter, 3565 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3565 SdHoareTripleChecker+Valid, 3646 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:06,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3565 Valid, 3646 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:13:06,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2023-11-23 21:13:06,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 3235. [2023-11-23 21:13:06,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3003 states have (on average 1.7592407592407593) internal successors, (5283), 3010 states have internal predecessors, (5283), 182 states have call successors, (182), 49 states have call predecessors, (182), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2023-11-23 21:13:06,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 5645 transitions. [2023-11-23 21:13:06,664 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 5645 transitions. Word has length 145 [2023-11-23 21:13:06,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:06,667 INFO L495 AbstractCegarLoop]: Abstraction has 3235 states and 5645 transitions. [2023-11-23 21:13:06,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:06,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 5645 transitions. [2023-11-23 21:13:06,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 21:13:06,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:06,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:06,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:06,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-23 21:13:06,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:06,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:06,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1423770653, now seen corresponding path program 1 times [2023-11-23 21:13:06,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:06,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83405900] [2023-11-23 21:13:06,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:06,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:13:07,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:07,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83405900] [2023-11-23 21:13:07,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83405900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:07,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817346611] [2023-11-23 21:13:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:07,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:07,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:07,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:07,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:13:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:07,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:13:07,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 21:13:07,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:07,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817346611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:07,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:13:07,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:13:07,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209665506] [2023-11-23 21:13:07,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:07,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:07,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:07,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:07,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:07,460 INFO L87 Difference]: Start difference. First operand 3235 states and 5645 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:08,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:08,123 INFO L93 Difference]: Finished difference Result 6388 states and 10462 transitions. [2023-11-23 21:13:08,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:08,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-11-23 21:13:08,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:08,160 INFO L225 Difference]: With dead ends: 6388 [2023-11-23 21:13:08,160 INFO L226 Difference]: Without dead ends: 4799 [2023-11-23 21:13:08,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:08,171 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 3559 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3559 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:08,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3559 Valid, 3586 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:13:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4799 states. [2023-11-23 21:13:08,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4799 to 4787. [2023-11-23 21:13:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4787 states, 4339 states have (on average 1.6702005070292694) internal successors, (7247), 4350 states have internal predecessors, (7247), 350 states have call successors, (350), 97 states have call predecessors, (350), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-23 21:13:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4787 states to 4787 states and 7945 transitions. [2023-11-23 21:13:08,393 INFO L78 Accepts]: Start accepts. Automaton has 4787 states and 7945 transitions. Word has length 145 [2023-11-23 21:13:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:08,394 INFO L495 AbstractCegarLoop]: Abstraction has 4787 states and 7945 transitions. [2023-11-23 21:13:08,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4787 states and 7945 transitions. [2023-11-23 21:13:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 21:13:08,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:08,405 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:08,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:08,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-23 21:13:08,627 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:08,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:08,628 INFO L85 PathProgramCache]: Analyzing trace with hash 414770277, now seen corresponding path program 1 times [2023-11-23 21:13:08,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:08,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169652958] [2023-11-23 21:13:08,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:08,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:13:08,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:08,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169652958] [2023-11-23 21:13:08,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169652958] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:08,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765616102] [2023-11-23 21:13:08,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:08,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:08,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:08,834 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:08,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:13:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:09,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:13:09,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:09,156 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 21:13:09,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:09,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765616102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:09,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:13:09,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:13:09,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693489246] [2023-11-23 21:13:09,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:09,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:09,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:09,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:09,159 INFO L87 Difference]: Start difference. First operand 4787 states and 7945 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:09,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:09,920 INFO L93 Difference]: Finished difference Result 11020 states and 17434 transitions. [2023-11-23 21:13:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:09,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-11-23 21:13:09,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:10,133 INFO L225 Difference]: With dead ends: 11020 [2023-11-23 21:13:10,133 INFO L226 Difference]: Without dead ends: 7879 [2023-11-23 21:13:10,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:10,150 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 3568 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3568 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:10,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3568 Valid, 3586 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:13:10,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2023-11-23 21:13:10,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 7859. [2023-11-23 21:13:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 6987 states have (on average 1.5925289823958781) internal successors, (11127), 7006 states have internal predecessors, (11127), 678 states have call successors, (678), 193 states have call predecessors, (678), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2023-11-23 21:13:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 12481 transitions. [2023-11-23 21:13:10,519 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 12481 transitions. Word has length 145 [2023-11-23 21:13:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:10,519 INFO L495 AbstractCegarLoop]: Abstraction has 7859 states and 12481 transitions. [2023-11-23 21:13:10,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 12481 transitions. [2023-11-23 21:13:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 21:13:10,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:10,540 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:10,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:10,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:10,760 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:10,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:10,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1097634269, now seen corresponding path program 1 times [2023-11-23 21:13:10,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:10,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351835913] [2023-11-23 21:13:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:10,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:13:11,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:11,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351835913] [2023-11-23 21:13:11,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351835913] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:11,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416004537] [2023-11-23 21:13:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:11,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:11,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:11,009 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:11,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:13:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:11,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:13:11,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:13:11,375 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:11,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416004537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:11,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:13:11,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:13:11,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107118814] [2023-11-23 21:13:11,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:11,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:11,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:11,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:11,377 INFO L87 Difference]: Start difference. First operand 7859 states and 12481 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:12,236 INFO L93 Difference]: Finished difference Result 20188 states and 31178 transitions. [2023-11-23 21:13:12,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:12,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-11-23 21:13:12,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:12,338 INFO L225 Difference]: With dead ends: 20188 [2023-11-23 21:13:12,339 INFO L226 Difference]: Without dead ends: 13975 [2023-11-23 21:13:12,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:12,368 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 3538 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3538 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:12,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3538 Valid, 3586 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:13:12,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13975 states. [2023-11-23 21:13:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13975 to 13939. [2023-11-23 21:13:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13939 states, 12235 states have (on average 1.5358398038414385) internal successors, (18791), 12270 states have internal predecessors, (18791), 1318 states have call successors, (1318), 385 states have call predecessors, (1318), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2023-11-23 21:13:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 21425 transitions. [2023-11-23 21:13:13,167 INFO L78 Accepts]: Start accepts. Automaton has 13939 states and 21425 transitions. Word has length 145 [2023-11-23 21:13:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:13,167 INFO L495 AbstractCegarLoop]: Abstraction has 13939 states and 21425 transitions. [2023-11-23 21:13:13,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:13,168 INFO L276 IsEmpty]: Start isEmpty. Operand 13939 states and 21425 transitions. [2023-11-23 21:13:13,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 21:13:13,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:13,202 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:13,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:13,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:13:13,416 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:13,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:13,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1851455585, now seen corresponding path program 1 times [2023-11-23 21:13:13,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:13,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524620110] [2023-11-23 21:13:13,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:13,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:13:13,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:13,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524620110] [2023-11-23 21:13:13,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524620110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:13,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612765838] [2023-11-23 21:13:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:13,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:13,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:13,618 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:13,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:13:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:13,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:13:13,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-23 21:13:13,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:13,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612765838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:13,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:13:13,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:13:13,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516496647] [2023-11-23 21:13:13,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:13,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:13,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:13,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:13,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:13,982 INFO L87 Difference]: Start difference. First operand 13939 states and 21425 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:15,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:15,155 INFO L93 Difference]: Finished difference Result 38332 states and 58266 transitions. [2023-11-23 21:13:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:15,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-11-23 21:13:15,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:15,289 INFO L225 Difference]: With dead ends: 38332 [2023-11-23 21:13:15,289 INFO L226 Difference]: Without dead ends: 26039 [2023-11-23 21:13:15,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:15,340 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 3541 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3541 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:15,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3541 Valid, 3586 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:13:15,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26039 states. [2023-11-23 21:13:16,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26039 to 25971. [2023-11-23 21:13:16,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25971 states, 22635 states have (on average 1.4988734261100067) internal successors, (33927), 22702 states have internal predecessors, (33927), 2566 states have call successors, (2566), 769 states have call predecessors, (2566), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2023-11-23 21:13:16,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25971 states to 25971 states and 39057 transitions. [2023-11-23 21:13:16,871 INFO L78 Accepts]: Start accepts. Automaton has 25971 states and 39057 transitions. Word has length 145 [2023-11-23 21:13:16,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:16,871 INFO L495 AbstractCegarLoop]: Abstraction has 25971 states and 39057 transitions. [2023-11-23 21:13:16,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:16,872 INFO L276 IsEmpty]: Start isEmpty. Operand 25971 states and 39057 transitions. [2023-11-23 21:13:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-23 21:13:16,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:16,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:16,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:13:17,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:17,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:17,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:17,153 INFO L85 PathProgramCache]: Analyzing trace with hash 336289123, now seen corresponding path program 1 times [2023-11-23 21:13:17,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:17,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470485663] [2023-11-23 21:13:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:17,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:13:17,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:17,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470485663] [2023-11-23 21:13:17,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470485663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:17,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477801727] [2023-11-23 21:13:17,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:17,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:17,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:17,409 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:17,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6d68dc4-f625-4420-869b-3a060a0454e4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:13:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:17,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:13:17,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:13:17,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:13:17,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477801727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:17,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:13:17,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 21:13:17,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390495448] [2023-11-23 21:13:17,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:17,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:17,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:17,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:17,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:17,909 INFO L87 Difference]: Start difference. First operand 25971 states and 39057 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:19,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:19,585 INFO L93 Difference]: Finished difference Result 74236 states and 111642 transitions. [2023-11-23 21:13:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:19,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2023-11-23 21:13:19,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:19,823 INFO L225 Difference]: With dead ends: 74236 [2023-11-23 21:13:19,823 INFO L226 Difference]: Without dead ends: 49911 [2023-11-23 21:13:19,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:13:19,910 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 3553 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3553 SdHoareTripleChecker+Valid, 3586 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:19,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3553 Valid, 3586 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:13:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49911 states.