./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.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_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/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_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/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_6869789a-08c4-47af-af2b-0c6b600eee58/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 54640fbb6743a38bf41f3a8b2318fcad885a58c92146d7845af619d355e32c56 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:27:58,167 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:27:58,256 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:27:58,261 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:27:58,261 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:27:58,293 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:27:58,293 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:27:58,294 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:27:58,295 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:27:58,296 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:27:58,297 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:27:58,297 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:27:58,297 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:27:58,297 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:27:58,298 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:27:58,298 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:27:58,298 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:27:58,299 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:27:58,299 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:27:58,299 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:27:58,300 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:27:58,304 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:27:58,305 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:27:58,305 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:27:58,305 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:27:58,305 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:27:58,306 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:27:58,306 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:27:58,306 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:27:58,306 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:27:58,307 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:27:58,307 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:27:58,307 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:27:58,307 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:27:58,308 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:27:58,308 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:27:58,308 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:27:58,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:27:58,312 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:58,313 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:27:58,313 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:27:58,313 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:27:58,314 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:27:58,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:27:58,315 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:27:58,315 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:27:58,315 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:27:58,315 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_6869789a-08c4-47af-af2b-0c6b600eee58/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54640fbb6743a38bf41f3a8b2318fcad885a58c92146d7845af619d355e32c56 [2024-11-02 12:27:58,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:27:58,694 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:27:58,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:27:58,703 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:27:58,704 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:27:58,705 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c Unable to find full path for "g++" [2024-11-02 12:28:00,914 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:28:01,177 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:28:01,181 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c [2024-11-02 12:28:01,207 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/data/b316a7ae4/390e8cfa30a14e08a1053884a5cb4a55/FLAG64562dd4f [2024-11-02 12:28:01,239 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/data/b316a7ae4/390e8cfa30a14e08a1053884a5cb4a55 [2024-11-02 12:28:01,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:28:01,243 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:28:01,248 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:28:01,248 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:28:01,254 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:28:01,255 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:28:01" (1/1) ... [2024-11-02 12:28:01,257 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aa063ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:01, skipping insertion in model container [2024-11-02 12:28:01,257 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:28:01" (1/1) ... [2024-11-02 12:28:01,355 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:28:01,575 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_6869789a-08c4-47af-af2b-0c6b600eee58/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c[911,924] [2024-11-02 12:28:01,697 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_6869789a-08c4-47af-af2b-0c6b600eee58/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c[8416,8429] [2024-11-02 12:28:01,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:28:01,890 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:28:01,906 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_6869789a-08c4-47af-af2b-0c6b600eee58/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c[911,924] [2024-11-02 12:28:01,934 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_6869789a-08c4-47af-af2b-0c6b600eee58/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c[8416,8429] [2024-11-02 12:28:02,013 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:28:02,048 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:28:02,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02 WrapperNode [2024-11-02 12:28:02,049 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:28:02,050 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:28:02,050 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:28:02,050 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:28:02,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02" (1/1) ... [2024-11-02 12:28:02,075 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02" (1/1) ... [2024-11-02 12:28:02,165 INFO L138 Inliner]: procedures = 79, calls = 98, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1112 [2024-11-02 12:28:02,165 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:28:02,166 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:28:02,166 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:28:02,166 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:28:02,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02" (1/1) ... [2024-11-02 12:28:02,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02" (1/1) ... [2024-11-02 12:28:02,218 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02" (1/1) ... [2024-11-02 12:28:02,222 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02" (1/1) ... [2024-11-02 12:28:02,249 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02" (1/1) ... [2024-11-02 12:28:02,274 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02" (1/1) ... [2024-11-02 12:28:02,280 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02" (1/1) ... [2024-11-02 12:28:02,284 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02" (1/1) ... [2024-11-02 12:28:02,294 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:28:02,295 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:28:02,295 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:28:02,295 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:28:02,296 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02" (1/1) ... [2024-11-02 12:28:02,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:28:02,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:02,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:28:02,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:28:02,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:28:02,388 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 12:28:02,388 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 12:28:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-02 12:28:02,389 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-02 12:28:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 12:28:02,389 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 12:28:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 12:28:02,389 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 12:28:02,389 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-02 12:28:02,390 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-02 12:28:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 12:28:02,390 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 12:28:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 12:28:02,390 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 12:28:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-02 12:28:02,390 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-02 12:28:02,390 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-02 12:28:02,391 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-02 12:28:02,392 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-02 12:28:02,393 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-02 12:28:02,393 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 12:28:02,393 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 12:28:02,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:28:02,393 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 12:28:02,393 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 12:28:02,393 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-02 12:28:02,394 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-02 12:28:02,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:28:02,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:28:02,394 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 12:28:02,394 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 12:28:02,394 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-02 12:28:02,394 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-02 12:28:02,612 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:28:02,616 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:28:03,877 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2024-11-02 12:28:03,878 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2024-11-02 12:28:04,202 INFO L? ?]: Removed 134 outVars from TransFormulas that were not future-live. [2024-11-02 12:28:04,203 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:28:04,954 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:28:04,955 INFO L316 CfgBuilder]: Removed 19 assume(true) statements. [2024-11-02 12:28:04,955 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:04 BoogieIcfgContainer [2024-11-02 12:28:04,955 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:28:04,959 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:28:04,959 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:28:04,962 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:28:04,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:28:01" (1/3) ... [2024-11-02 12:28:04,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693cadc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:28:04, skipping insertion in model container [2024-11-02 12:28:04,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:02" (2/3) ... [2024-11-02 12:28:04,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693cadc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:28:04, skipping insertion in model container [2024-11-02 12:28:04,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:04" (3/3) ... [2024-11-02 12:28:04,967 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.12.cil-1.c [2024-11-02 12:28:04,991 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:28:04,991 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 12:28:05,092 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:28:05,099 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;@4043daa1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:28:05,100 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 12:28:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 286 states, 224 states have (on average 1.5178571428571428) internal successors, (340), 232 states have internal predecessors, (340), 44 states have call successors, (44), 15 states have call predecessors, (44), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-02 12:28:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 12:28:05,118 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:05,118 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] [2024-11-02 12:28:05,120 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:05,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash 397949215, now seen corresponding path program 1 times [2024-11-02 12:28:05,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:05,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39255847] [2024-11-02 12:28:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:05,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:05,604 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 12:28:05,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:05,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39255847] [2024-11-02 12:28:05,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39255847] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:05,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:05,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:28:05,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522383616] [2024-11-02 12:28:05,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:05,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:28:05,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:05,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:28:05,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:28:05,647 INFO L87 Difference]: Start difference. First operand has 286 states, 224 states have (on average 1.5178571428571428) internal successors, (340), 232 states have internal predecessors, (340), 44 states have call successors, (44), 15 states have call predecessors, (44), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:28:06,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:06,370 INFO L93 Difference]: Finished difference Result 694 states and 1034 transitions. [2024-11-02 12:28:06,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:28:06,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2024-11-02 12:28:06,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:06,387 INFO L225 Difference]: With dead ends: 694 [2024-11-02 12:28:06,387 INFO L226 Difference]: Without dead ends: 409 [2024-11-02 12:28:06,396 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 12:28:06,399 INFO L432 NwaCegarLoop]: 405 mSDtfsCounter, 477 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:06,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 721 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-02 12:28:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-11-02 12:28:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 398. [2024-11-02 12:28:06,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 305 states have (on average 1.4426229508196722) internal successors, (440), 310 states have internal predecessors, (440), 64 states have call successors, (64), 29 states have call predecessors, (64), 27 states have return successors, (63), 60 states have call predecessors, (63), 60 states have call successors, (63) [2024-11-02 12:28:06,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 567 transitions. [2024-11-02 12:28:06,484 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 567 transitions. Word has length 44 [2024-11-02 12:28:06,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:06,485 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 567 transitions. [2024-11-02 12:28:06,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:28:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 567 transitions. [2024-11-02 12:28:06,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 12:28:06,490 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:06,490 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] [2024-11-02 12:28:06,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:28:06,491 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:06,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:06,493 INFO L85 PathProgramCache]: Analyzing trace with hash -835380698, now seen corresponding path program 1 times [2024-11-02 12:28:06,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:06,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670443237] [2024-11-02 12:28:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:06,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:06,673 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 12:28:06,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:06,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670443237] [2024-11-02 12:28:06,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670443237] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:06,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:06,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 12:28:06,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311423473] [2024-11-02 12:28:06,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:06,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:28:06,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:28:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:28:06,677 INFO L87 Difference]: Start difference. First operand 398 states and 567 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:28:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:07,868 INFO L93 Difference]: Finished difference Result 935 states and 1290 transitions. [2024-11-02 12:28:07,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:28:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-02 12:28:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:07,872 INFO L225 Difference]: With dead ends: 935 [2024-11-02 12:28:07,873 INFO L226 Difference]: Without dead ends: 469 [2024-11-02 12:28:07,875 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:28:07,876 INFO L432 NwaCegarLoop]: 454 mSDtfsCounter, 1012 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:07,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 1184 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-02 12:28:07,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-11-02 12:28:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 384. [2024-11-02 12:28:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 291 states have (on average 1.3986254295532645) internal successors, (407), 296 states have internal predecessors, (407), 64 states have call successors, (64), 29 states have call predecessors, (64), 27 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-02 12:28:07,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 531 transitions. [2024-11-02 12:28:07,917 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 531 transitions. Word has length 45 [2024-11-02 12:28:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:07,917 INFO L471 AbstractCegarLoop]: Abstraction has 384 states and 531 transitions. [2024-11-02 12:28:07,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 12:28:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 531 transitions. [2024-11-02 12:28:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 12:28:07,919 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:07,919 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] [2024-11-02 12:28:07,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:28:07,920 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:07,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash -976278952, now seen corresponding path program 1 times [2024-11-02 12:28:07,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:07,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321714008] [2024-11-02 12:28:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:07,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:08,229 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 12:28:08,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:08,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321714008] [2024-11-02 12:28:08,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321714008] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:08,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:08,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 12:28:08,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741164579] [2024-11-02 12:28:08,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:08,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:28:08,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:08,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:28:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:28:08,235 INFO L87 Difference]: Start difference. First operand 384 states and 531 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 12:28:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:09,492 INFO L93 Difference]: Finished difference Result 686 states and 899 transitions. [2024-11-02 12:28:09,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 12:28:09,493 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2024-11-02 12:28:09,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:09,497 INFO L225 Difference]: With dead ends: 686 [2024-11-02 12:28:09,499 INFO L226 Difference]: Without dead ends: 512 [2024-11-02 12:28:09,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:28:09,501 INFO L432 NwaCegarLoop]: 229 mSDtfsCounter, 572 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:09,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 1051 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-02 12:28:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2024-11-02 12:28:09,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 486. [2024-11-02 12:28:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 359 states have (on average 1.3621169916434541) internal successors, (489), 364 states have internal predecessors, (489), 84 states have call successors, (84), 43 states have call predecessors, (84), 41 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2024-11-02 12:28:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 653 transitions. [2024-11-02 12:28:09,567 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 653 transitions. Word has length 46 [2024-11-02 12:28:09,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:09,567 INFO L471 AbstractCegarLoop]: Abstraction has 486 states and 653 transitions. [2024-11-02 12:28:09,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-02 12:28:09,568 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 653 transitions. [2024-11-02 12:28:09,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 12:28:09,571 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:09,571 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] [2024-11-02 12:28:09,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:28:09,572 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:09,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:09,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1525970373, now seen corresponding path program 1 times [2024-11-02 12:28:09,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:09,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140944669] [2024-11-02 12:28:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:09,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:09,631 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 12:28:09,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:09,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140944669] [2024-11-02 12:28:09,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140944669] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:09,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:09,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:28:09,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559398404] [2024-11-02 12:28:09,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:09,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:09,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:09,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:09,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:28:09,634 INFO L87 Difference]: Start difference. First operand 486 states and 653 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:28:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:09,774 INFO L93 Difference]: Finished difference Result 751 states and 989 transitions. [2024-11-02 12:28:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:28:09,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2024-11-02 12:28:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:09,777 INFO L225 Difference]: With dead ends: 751 [2024-11-02 12:28:09,777 INFO L226 Difference]: Without dead ends: 205 [2024-11-02 12:28:09,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:28:09,780 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 378 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:09,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 328 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-02 12:28:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2024-11-02 12:28:09,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 170 states have (on average 1.4941176470588236) internal successors, (254), 172 states have internal predecessors, (254), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-02 12:28:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 308 transitions. [2024-11-02 12:28:09,796 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 308 transitions. Word has length 47 [2024-11-02 12:28:09,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:09,796 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 308 transitions. [2024-11-02 12:28:09,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-02 12:28:09,797 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 308 transitions. [2024-11-02 12:28:09,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-02 12:28:09,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:09,800 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, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:09,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:28:09,801 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:09,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:09,801 INFO L85 PathProgramCache]: Analyzing trace with hash 372090149, now seen corresponding path program 1 times [2024-11-02 12:28:09,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:09,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764651645] [2024-11-02 12:28:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:09,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:10,058 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 12:28:10,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:10,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764651645] [2024-11-02 12:28:10,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764651645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:10,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:10,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:28:10,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000372695] [2024-11-02 12:28:10,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:10,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:28:10,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:10,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:28:10,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:28:10,067 INFO L87 Difference]: Start difference. First operand 205 states and 308 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 12:28:11,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:11,088 INFO L93 Difference]: Finished difference Result 1158 states and 1848 transitions. [2024-11-02 12:28:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:28:11,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 68 [2024-11-02 12:28:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:11,098 INFO L225 Difference]: With dead ends: 1158 [2024-11-02 12:28:11,099 INFO L226 Difference]: Without dead ends: 959 [2024-11-02 12:28:11,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-02 12:28:11,103 INFO L432 NwaCegarLoop]: 486 mSDtfsCounter, 1400 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:11,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 1344 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-02 12:28:11,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2024-11-02 12:28:11,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 946. [2024-11-02 12:28:11,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 802 states have (on average 1.4887780548628429) internal successors, (1194), 807 states have internal predecessors, (1194), 113 states have call successors, (113), 31 states have call predecessors, (113), 30 states have return successors, (173), 108 states have call predecessors, (173), 111 states have call successors, (173) [2024-11-02 12:28:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1480 transitions. [2024-11-02 12:28:11,218 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1480 transitions. Word has length 68 [2024-11-02 12:28:11,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:11,219 INFO L471 AbstractCegarLoop]: Abstraction has 946 states and 1480 transitions. [2024-11-02 12:28:11,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 12:28:11,219 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1480 transitions. [2024-11-02 12:28:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-02 12:28:11,223 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:11,223 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, 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] [2024-11-02 12:28:11,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:28:11,224 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:11,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:11,224 INFO L85 PathProgramCache]: Analyzing trace with hash -855206023, now seen corresponding path program 1 times [2024-11-02 12:28:11,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:11,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276121245] [2024-11-02 12:28:11,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:11,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:28:11,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:11,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276121245] [2024-11-02 12:28:11,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276121245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:11,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770346544] [2024-11-02 12:28:11,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:11,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:11,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:11,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:11,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:28:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:11,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:28:11,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-02 12:28:11,847 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:28:11,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770346544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:11,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:28:11,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 12:28:11,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619467192] [2024-11-02 12:28:11,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:11,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:11,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:11,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:11,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:28:11,850 INFO L87 Difference]: Start difference. First operand 946 states and 1480 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 12:28:12,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:12,154 INFO L93 Difference]: Finished difference Result 2810 states and 4522 transitions. [2024-11-02 12:28:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:28:12,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 138 [2024-11-02 12:28:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:12,166 INFO L225 Difference]: With dead ends: 2810 [2024-11-02 12:28:12,166 INFO L226 Difference]: Without dead ends: 1870 [2024-11-02 12:28:12,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 12:28:12,171 INFO L432 NwaCegarLoop]: 260 mSDtfsCounter, 256 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:12,172 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 506 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:28:12,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2024-11-02 12:28:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1861. [2024-11-02 12:28:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1585 states have (on average 1.4851735015772871) internal successors, (2354), 1593 states have internal predecessors, (2354), 215 states have call successors, (215), 61 states have call predecessors, (215), 60 states have return successors, (333), 207 states have call predecessors, (333), 213 states have call successors, (333) [2024-11-02 12:28:12,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2902 transitions. [2024-11-02 12:28:12,302 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2902 transitions. Word has length 138 [2024-11-02 12:28:12,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:12,303 INFO L471 AbstractCegarLoop]: Abstraction has 1861 states and 2902 transitions. [2024-11-02 12:28:12,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 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 12:28:12,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2902 transitions. [2024-11-02 12:28:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-02 12:28:12,308 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:12,308 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, 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] [2024-11-02 12:28:12,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:28:12,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:12,509 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:12,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:12,510 INFO L85 PathProgramCache]: Analyzing trace with hash 543049369, now seen corresponding path program 1 times [2024-11-02 12:28:12,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:12,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371575104] [2024-11-02 12:28:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:12,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:28:12,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:12,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371575104] [2024-11-02 12:28:12,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371575104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:12,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414674305] [2024-11-02 12:28:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:12,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:12,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:12,742 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:12,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:28:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:13,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:28:13,014 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-02 12:28:13,120 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:28:13,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414674305] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:13,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:28:13,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 12:28:13,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988726065] [2024-11-02 12:28:13,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:13,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:13,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:13,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:13,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:28:13,127 INFO L87 Difference]: Start difference. First operand 1861 states and 2902 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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 12:28:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:13,606 INFO L93 Difference]: Finished difference Result 5540 states and 8880 transitions. [2024-11-02 12:28:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:28:13,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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 138 [2024-11-02 12:28:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:13,629 INFO L225 Difference]: With dead ends: 5540 [2024-11-02 12:28:13,630 INFO L226 Difference]: Without dead ends: 3685 [2024-11-02 12:28:13,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 12:28:13,639 INFO L432 NwaCegarLoop]: 260 mSDtfsCounter, 259 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:13,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 506 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:28:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3685 states. [2024-11-02 12:28:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3685 to 3671. [2024-11-02 12:28:13,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3136 states have (on average 1.4808673469387754) internal successors, (4644), 3150 states have internal predecessors, (4644), 414 states have call successors, (414), 121 states have call predecessors, (414), 120 states have return successors, (644), 400 states have call predecessors, (644), 412 states have call successors, (644) [2024-11-02 12:28:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 5702 transitions. [2024-11-02 12:28:13,950 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 5702 transitions. Word has length 138 [2024-11-02 12:28:13,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:13,951 INFO L471 AbstractCegarLoop]: Abstraction has 3671 states and 5702 transitions. [2024-11-02 12:28:13,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 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 12:28:13,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 5702 transitions. [2024-11-02 12:28:13,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-02 12:28:13,962 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:13,962 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, 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] [2024-11-02 12:28:13,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:28:14,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:14,163 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:14,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:14,163 INFO L85 PathProgramCache]: Analyzing trace with hash -918371463, now seen corresponding path program 1 times [2024-11-02 12:28:14,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:14,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58577754] [2024-11-02 12:28:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:14,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:28:14,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:14,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58577754] [2024-11-02 12:28:14,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58577754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:14,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399128214] [2024-11-02 12:28:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:14,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:14,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:14,383 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:14,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:28:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:14,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:28:14,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-02 12:28:14,723 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:28:14,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399128214] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:14,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:28:14,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 12:28:14,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238523161] [2024-11-02 12:28:14,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:14,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:14,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:28:14,728 INFO L87 Difference]: Start difference. First operand 3671 states and 5702 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 12:28:15,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:15,351 INFO L93 Difference]: Finished difference Result 10940 states and 17455 transitions. [2024-11-02 12:28:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:28:15,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 138 [2024-11-02 12:28:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:15,393 INFO L225 Difference]: With dead ends: 10940 [2024-11-02 12:28:15,393 INFO L226 Difference]: Without dead ends: 7275 [2024-11-02 12:28:15,410 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 12:28:15,411 INFO L432 NwaCegarLoop]: 255 mSDtfsCounter, 277 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:15,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 501 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:28:15,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7275 states. [2024-11-02 12:28:15,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7275 to 7251. [2024-11-02 12:28:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7251 states, 6208 states have (on average 1.476159793814433) internal successors, (9164), 6234 states have internal predecessors, (9164), 802 states have call successors, (802), 241 states have call predecessors, (802), 240 states have return successors, (1248), 776 states have call predecessors, (1248), 800 states have call successors, (1248) [2024-11-02 12:28:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7251 states to 7251 states and 11214 transitions. [2024-11-02 12:28:16,013 INFO L78 Accepts]: Start accepts. Automaton has 7251 states and 11214 transitions. Word has length 138 [2024-11-02 12:28:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:16,013 INFO L471 AbstractCegarLoop]: Abstraction has 7251 states and 11214 transitions. [2024-11-02 12:28:16,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 12:28:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 7251 states and 11214 transitions. [2024-11-02 12:28:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-02 12:28:16,025 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:16,025 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, 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] [2024-11-02 12:28:16,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:28:16,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:16,229 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:16,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:16,230 INFO L85 PathProgramCache]: Analyzing trace with hash -40515495, now seen corresponding path program 1 times [2024-11-02 12:28:16,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:16,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013436331] [2024-11-02 12:28:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:16,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:28:16,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:16,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013436331] [2024-11-02 12:28:16,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013436331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:16,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511503122] [2024-11-02 12:28:16,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:16,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:16,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:16,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:16,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:28:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:16,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:28:16,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-02 12:28:16,903 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:28:16,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511503122] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:16,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:28:16,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 12:28:16,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33569347] [2024-11-02 12:28:16,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:16,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:16,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:16,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:16,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:28:16,905 INFO L87 Difference]: Start difference. First operand 7251 states and 11214 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 12:28:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:17,839 INFO L93 Difference]: Finished difference Result 21620 states and 34323 transitions. [2024-11-02 12:28:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:28:17,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 138 [2024-11-02 12:28:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:17,950 INFO L225 Difference]: With dead ends: 21620 [2024-11-02 12:28:17,952 INFO L226 Difference]: Without dead ends: 14375 [2024-11-02 12:28:17,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 12:28:17,992 INFO L432 NwaCegarLoop]: 260 mSDtfsCounter, 280 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:17,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 506 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:28:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14375 states. [2024-11-02 12:28:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14375 to 14331. [2024-11-02 12:28:19,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14331 states, 12292 states have (on average 1.4712007809957697) internal successors, (18084), 12342 states have internal predecessors, (18084), 1558 states have call successors, (1558), 481 states have call predecessors, (1558), 480 states have return successors, (2420), 1508 states have call predecessors, (2420), 1556 states have call successors, (2420) [2024-11-02 12:28:19,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14331 states to 14331 states and 22062 transitions. [2024-11-02 12:28:19,417 INFO L78 Accepts]: Start accepts. Automaton has 14331 states and 22062 transitions. Word has length 138 [2024-11-02 12:28:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:19,418 INFO L471 AbstractCegarLoop]: Abstraction has 14331 states and 22062 transitions. [2024-11-02 12:28:19,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 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 12:28:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 14331 states and 22062 transitions. [2024-11-02 12:28:19,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-02 12:28:19,442 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:19,442 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, 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] [2024-11-02 12:28:19,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-02 12:28:19,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:19,643 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:19,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:19,643 INFO L85 PathProgramCache]: Analyzing trace with hash 110761849, now seen corresponding path program 1 times [2024-11-02 12:28:19,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:19,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240856735] [2024-11-02 12:28:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:19,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:19,826 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:28:19,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:19,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240856735] [2024-11-02 12:28:19,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240856735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:19,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270175245] [2024-11-02 12:28:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:19,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:19,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:19,830 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:19,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:28:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:20,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:28:20,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:20,164 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-02 12:28:20,164 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:28:20,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270175245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:20,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:28:20,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 12:28:20,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026032627] [2024-11-02 12:28:20,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:20,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:20,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:20,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:28:20,170 INFO L87 Difference]: Start difference. First operand 14331 states and 22062 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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 12:28:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:22,094 INFO L93 Difference]: Finished difference Result 42740 states and 67495 transitions. [2024-11-02 12:28:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:28:22,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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 138 [2024-11-02 12:28:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:22,279 INFO L225 Difference]: With dead ends: 42740 [2024-11-02 12:28:22,279 INFO L226 Difference]: Without dead ends: 28415 [2024-11-02 12:28:22,349 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 12:28:22,350 INFO L432 NwaCegarLoop]: 255 mSDtfsCounter, 265 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:22,350 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 501 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:28:22,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28415 states. [2024-11-02 12:28:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28415 to 28331. [2024-11-02 12:28:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28331 states, 24340 states have (on average 1.4660640920295809) internal successors, (35684), 24438 states have internal predecessors, (35684), 3030 states have call successors, (3030), 961 states have call predecessors, (3030), 960 states have return successors, (4692), 2932 states have call predecessors, (4692), 3028 states have call successors, (4692) [2024-11-02 12:28:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28331 states to 28331 states and 43406 transitions. [2024-11-02 12:28:24,560 INFO L78 Accepts]: Start accepts. Automaton has 28331 states and 43406 transitions. Word has length 138 [2024-11-02 12:28:24,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:24,561 INFO L471 AbstractCegarLoop]: Abstraction has 28331 states and 43406 transitions. [2024-11-02 12:28:24,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 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 12:28:24,562 INFO L276 IsEmpty]: Start isEmpty. Operand 28331 states and 43406 transitions. [2024-11-02 12:28:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-02 12:28:24,813 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:24,813 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, 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] [2024-11-02 12:28:24,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 12:28:25,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-02 12:28:25,014 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:25,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1118137433, now seen corresponding path program 1 times [2024-11-02 12:28:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225579432] [2024-11-02 12:28:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:28:25,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:25,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225579432] [2024-11-02 12:28:25,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225579432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:25,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922940751] [2024-11-02 12:28:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:25,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:25,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:25,208 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:25,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6869789a-08c4-47af-af2b-0c6b600eee58/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:28:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:25,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:28:25,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-02 12:28:25,562 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:28:25,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922940751] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:25,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:28:25,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 12:28:25,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474995695] [2024-11-02 12:28:25,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:25,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:25,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:25,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:28:25,566 INFO L87 Difference]: Start difference. First operand 28331 states and 43406 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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)