./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2 --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 ebeacfd453f434fdf714d7b079047e83de79a1e641783287d3b5f33f6eefdc0e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:31:54,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:31:54,194 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:31:54,203 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:31:54,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:31:54,260 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:31:54,262 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:31:54,263 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:31:54,263 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:31:54,264 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:31:54,265 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:31:54,265 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:31:54,266 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:31:54,269 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:31:54,270 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:31:54,270 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:31:54,270 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:31:54,271 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:31:54,271 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:31:54,272 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:31:54,275 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:31:54,276 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:31:54,277 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:31:54,277 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:31:54,277 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:31:54,278 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:31:54,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:31:54,278 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:31:54,279 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:31:54,279 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:31:54,279 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:31:54,280 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:31:54,282 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:31:54,282 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:31:54,282 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:31:54,283 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:31:54,283 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:31:54,284 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:31:54,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:31:54,285 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:31:54,286 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:31:54,286 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:31:54,286 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:31:54,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:31:54,288 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:31:54,288 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:31:54,288 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:31:54,289 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_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebeacfd453f434fdf714d7b079047e83de79a1e641783287d3b5f33f6eefdc0e [2024-11-02 12:31:54,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:31:54,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:31:54,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:31:54,697 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:31:54,698 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:31:54,699 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c Unable to find full path for "g++" [2024-11-02 12:31:56,702 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:31:57,502 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:31:57,502 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c [2024-11-02 12:31:57,566 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/data/72ec2ec4b/718d3cb5b85946ccaee85f5fb58c4aef/FLAG431f3622d [2024-11-02 12:31:57,587 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/data/72ec2ec4b/718d3cb5b85946ccaee85f5fb58c4aef [2024-11-02 12:31:57,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:31:57,592 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:31:57,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:31:57,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:31:57,602 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:31:57,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:31:57" (1/1) ... [2024-11-02 12:31:57,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54330dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:31:57, skipping insertion in model container [2024-11-02 12:31:57,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:31:57" (1/1) ... [2024-11-02 12:31:57,819 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:32:00,224 WARN L251 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_3d76af9d-001f-423e-978e-3538f84f171a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c[380323,380336] [2024-11-02 12:32:00,256 WARN L251 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_3d76af9d-001f-423e-978e-3538f84f171a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c[383339,383352] [2024-11-02 12:32:00,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:32:00,590 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:32:01,844 WARN L251 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_3d76af9d-001f-423e-978e-3538f84f171a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c[380323,380336] [2024-11-02 12:32:01,850 WARN L251 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_3d76af9d-001f-423e-978e-3538f84f171a/sv-benchmarks/c/combinations/Problem05_label45+token_ring.10.cil-1.c[383339,383352] [2024-11-02 12:32:01,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:32:01,945 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:32:01,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01 WrapperNode [2024-11-02 12:32:01,946 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:32:01,947 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:32:01,947 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:32:01,947 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:32:01,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01" (1/1) ... [2024-11-02 12:32:02,049 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01" (1/1) ... [2024-11-02 12:32:02,800 INFO L138 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 13119 [2024-11-02 12:32:02,800 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:32:02,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:32:02,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:32:02,805 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:32:02,822 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01" (1/1) ... [2024-11-02 12:32:02,822 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01" (1/1) ... [2024-11-02 12:32:02,896 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01" (1/1) ... [2024-11-02 12:32:02,900 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01" (1/1) ... [2024-11-02 12:32:03,131 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01" (1/1) ... [2024-11-02 12:32:03,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01" (1/1) ... [2024-11-02 12:32:03,223 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01" (1/1) ... [2024-11-02 12:32:03,244 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01" (1/1) ... [2024-11-02 12:32:03,311 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:32:03,313 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:32:03,313 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:32:03,313 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:32:03,314 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01" (1/1) ... [2024-11-02 12:32:03,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:32:03,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:03,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:32:03,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:32:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:32:03,506 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-02 12:32:03,507 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-02 12:32:03,507 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:32:03,508 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:32:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-02 12:32:03,508 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-02 12:32:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-02 12:32:03,508 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-02 12:32:03,508 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-02 12:32:03,508 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-02 12:32:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-02 12:32:03,509 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-02 12:32:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-02 12:32:03,509 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-02 12:32:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:32:03,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:32:03,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:32:03,752 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:32:03,758 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:32:15,271 INFO L? ?]: Removed 1747 outVars from TransFormulas that were not future-live. [2024-11-02 12:32:15,271 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:32:18,464 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:32:18,464 INFO L316 CfgBuilder]: Removed 14 assume(true) statements. [2024-11-02 12:32:18,465 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:32:18 BoogieIcfgContainer [2024-11-02 12:32:18,465 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:32:18,468 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:32:18,469 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:32:18,472 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:32:18,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:31:57" (1/3) ... [2024-11-02 12:32:18,474 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e72cdcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:32:18, skipping insertion in model container [2024-11-02 12:32:18,474 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:32:01" (2/3) ... [2024-11-02 12:32:18,475 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e72cdcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:32:18, skipping insertion in model container [2024-11-02 12:32:18,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:32:18" (3/3) ... [2024-11-02 12:32:18,477 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.10.cil-1.c [2024-11-02 12:32:18,500 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:32:18,501 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:32:18,654 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:32:18,662 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=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;@1394cd42, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:32:18,662 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:32:18,684 INFO L276 IsEmpty]: Start isEmpty. Operand has 1826 states, 1790 states have (on average 1.9541899441340782) internal successors, (3498), 1795 states have internal predecessors, (3498), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-02 12:32:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-02 12:32:18,707 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:18,708 INFO L215 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] [2024-11-02 12:32:18,709 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:18,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:18,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1126859817, now seen corresponding path program 1 times [2024-11-02 12:32:18,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:18,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429841093] [2024-11-02 12:32:18,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:18,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:32:19,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:19,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429841093] [2024-11-02 12:32:19,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429841093] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:19,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:32:19,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:32:19,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821171131] [2024-11-02 12:32:19,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:19,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:32:19,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:32:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:32:19,484 INFO L87 Difference]: Start difference. First operand has 1826 states, 1790 states have (on average 1.9541899441340782) internal successors, (3498), 1795 states have internal predecessors, (3498), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2024-11-02 12:32:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:20,851 INFO L93 Difference]: Finished difference Result 3811 states and 7368 transitions. [2024-11-02 12:32:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:32:20,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 62 [2024-11-02 12:32:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:20,877 INFO L225 Difference]: With dead ends: 3811 [2024-11-02 12:32:20,877 INFO L226 Difference]: Without dead ends: 1984 [2024-11-02 12:32:20,886 INFO L431 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 [2024-11-02 12:32:20,890 INFO L432 NwaCegarLoop]: 3480 mSDtfsCounter, 3743 mSDsluCounter, 3388 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 6868 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:20,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 6868 Invalid, 712 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-02 12:32:20,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2024-11-02 12:32:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1983. [2024-11-02 12:32:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1923 states have (on average 1.9157566302652107) internal successors, (3684), 1927 states have internal predecessors, (3684), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-02 12:32:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 3774 transitions. [2024-11-02 12:32:21,115 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 3774 transitions. Word has length 62 [2024-11-02 12:32:21,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:21,119 INFO L471 AbstractCegarLoop]: Abstraction has 1983 states and 3774 transitions. [2024-11-02 12:32:21,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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) [2024-11-02 12:32:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 3774 transitions. [2024-11-02 12:32:21,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-02 12:32:21,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:21,135 INFO L215 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, 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] [2024-11-02 12:32:21,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:32:21,140 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:21,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:21,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1414831431, now seen corresponding path program 1 times [2024-11-02 12:32:21,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:21,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258591879] [2024-11-02 12:32:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:21,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:32:21,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:32:21,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258591879] [2024-11-02 12:32:21,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258591879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:32:21,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492772843] [2024-11-02 12:32:21,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:21,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:21,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:32:21,672 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:32:21,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:32:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:32:21,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:32:21,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:32:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 12:32:22,069 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:32:22,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492772843] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:32:22,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:32:22,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 12:32:22,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528754021] [2024-11-02 12:32:22,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:32:22,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:32:22,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:32:22,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:32:22,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:32:22,075 INFO L87 Difference]: Start difference. First operand 1983 states and 3774 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) [2024-11-02 12:32:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:32:22,728 INFO L93 Difference]: Finished difference Result 2650 states and 4785 transitions. [2024-11-02 12:32:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:32:22,729 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 124 [2024-11-02 12:32:22,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:32:22,743 INFO L225 Difference]: With dead ends: 2650 [2024-11-02 12:32:22,743 INFO L226 Difference]: Without dead ends: 2313 [2024-11-02 12:32:22,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:32:22,747 INFO L432 NwaCegarLoop]: 3333 mSDtfsCounter, 3490 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3490 SdHoareTripleChecker+Valid, 3546 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:32:22,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3490 Valid, 3546 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 12:32:22,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2024-11-02 12:32:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2307. [2024-11-02 12:32:22,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2197 states have (on average 1.859353664087392) internal successors, (4085), 2202 states have internal predecessors, (4085), 84 states have call successors, (84), 25 states have call predecessors, (84), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2024-11-02 12:32:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 4251 transitions. [2024-11-02 12:32:22,847 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 4251 transitions. Word has length 124 [2024-11-02 12:32:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:32:22,848 INFO L471 AbstractCegarLoop]: Abstraction has 2307 states and 4251 transitions. [2024-11-02 12:32:22,849 INFO L472 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) [2024-11-02 12:32:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 4251 transitions. [2024-11-02 12:32:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-02 12:32:22,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:32:22,858 INFO L215 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, 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] [2024-11-02 12:32:22,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:32:23,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d76af9d-001f-423e-978e-3538f84f171a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:32:23,060 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:32:23,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:32:23,062 INFO L85 PathProgramCache]: Analyzing trace with hash -906766425, now seen corresponding path program 1 times [2024-11-02 12:32:23,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:32:23,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682181933] [2024-11-02 12:32:23,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:32:23,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:32:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat