./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje --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 38a1f42f3cb7a9f66fd0bd1b473ab60f2efbe0fc9c998d9f18da86c331297566 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:14:15,790 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:14:15,887 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:14:15,892 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:14:15,893 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:14:15,940 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:14:15,941 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:14:15,942 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:14:15,942 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:14:15,943 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:14:15,943 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:14:15,944 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:14:15,944 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:14:15,945 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:14:15,946 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:14:15,948 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:14:15,949 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:14:15,949 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:14:15,950 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:14:15,950 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:14:15,950 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:14:15,955 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:14:15,956 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:14:15,956 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:14:15,956 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:14:15,968 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:14:15,969 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:14:15,969 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:14:15,969 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:14:15,970 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:14:15,970 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:14:15,970 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:14:15,971 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:14:15,971 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:14:15,972 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:14:15,972 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:14:15,973 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:14:15,973 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:14:15,974 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:14:15,974 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:14:15,974 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:14:15,974 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:14:15,975 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:14:15,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:14:15,976 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:14:15,976 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:14:15,976 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:14:15,976 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_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38a1f42f3cb7a9f66fd0bd1b473ab60f2efbe0fc9c998d9f18da86c331297566 [2024-11-09 01:14:16,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:14:16,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:14:16,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:14:16,251 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:14:16,251 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:14:16,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c Unable to find full path for "g++" [2024-11-09 01:14:18,293 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:14:18,982 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:14:18,983 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c [2024-11-09 01:14:19,036 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/data/e5d753387/dc986cc5a2364e74a4dcadbc0195d459/FLAG2eaf27411 [2024-11-09 01:14:19,370 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/data/e5d753387/dc986cc5a2364e74a4dcadbc0195d459 [2024-11-09 01:14:19,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:14:19,377 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:14:19,381 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:14:19,382 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:14:19,387 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:14:19,388 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:14:19" (1/1) ... [2024-11-09 01:14:19,389 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f4451a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:19, skipping insertion in model container [2024-11-09 01:14:19,389 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:14:19" (1/1) ... [2024-11-09 01:14:19,701 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:14:22,027 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[380593,380606] [2024-11-09 01:14:22,075 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[383339,383352] [2024-11-09 01:14:22,430 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:14:22,443 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:14:23,627 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[380593,380606] [2024-11-09 01:14:23,635 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/sv-benchmarks/c/combinations/Problem05_label49+token_ring.14.cil.c[383339,383352] [2024-11-09 01:14:23,689 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:14:23,774 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:14:23,775 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23 WrapperNode [2024-11-09 01:14:23,775 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:14:23,776 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:14:23,776 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:14:23,777 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:14:23,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23" (1/1) ... [2024-11-09 01:14:23,895 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23" (1/1) ... [2024-11-09 01:14:24,512 INFO L138 Inliner]: procedures = 68, calls = 78, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 13221 [2024-11-09 01:14:24,512 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:14:24,516 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:14:24,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:14:24,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:14:24,530 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23" (1/1) ... [2024-11-09 01:14:24,545 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23" (1/1) ... [2024-11-09 01:14:24,635 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23" (1/1) ... [2024-11-09 01:14:24,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23" (1/1) ... [2024-11-09 01:14:24,942 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23" (1/1) ... [2024-11-09 01:14:25,070 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23" (1/1) ... [2024-11-09 01:14:25,112 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23" (1/1) ... [2024-11-09 01:14:25,128 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23" (1/1) ... [2024-11-09 01:14:25,231 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:14:25,234 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:14:25,234 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:14:25,235 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:14:25,236 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23" (1/1) ... [2024-11-09 01:14:25,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:14:25,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:25,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:14:25,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:14:25,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:14:25,309 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-09 01:14:25,309 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-09 01:14:25,309 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 01:14:25,309 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 01:14:25,309 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-09 01:14:25,309 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-09 01:14:25,309 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-09 01:14:25,309 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-09 01:14:25,310 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-09 01:14:25,310 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-09 01:14:25,310 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-09 01:14:25,311 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-09 01:14:25,311 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-09 01:14:25,311 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-09 01:14:25,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:14:25,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:14:25,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:14:25,514 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:14:25,517 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:14:35,709 INFO L? ?]: Removed 1759 outVars from TransFormulas that were not future-live. [2024-11-09 01:14:35,709 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:14:38,869 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:14:38,869 INFO L316 CfgBuilder]: Removed 16 assume(true) statements. [2024-11-09 01:14:38,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:14:38 BoogieIcfgContainer [2024-11-09 01:14:38,870 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:14:38,872 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:14:38,873 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:14:38,876 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:14:38,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:14:19" (1/3) ... [2024-11-09 01:14:38,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a1aa69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:14:38, skipping insertion in model container [2024-11-09 01:14:38,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:14:23" (2/3) ... [2024-11-09 01:14:38,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a1aa69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:14:38, skipping insertion in model container [2024-11-09 01:14:38,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:14:38" (3/3) ... [2024-11-09 01:14:38,879 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.14.cil.c [2024-11-09 01:14:38,902 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:14:38,902 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 01:14:39,023 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:14:39,030 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;@72a8993, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:14:39,031 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 01:14:39,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 1850 states, 1812 states have (on average 1.9492273730684326) internal successors, (3532), 1817 states have internal predecessors, (3532), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-09 01:14:39,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-09 01:14:39,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:39,062 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] [2024-11-09 01:14:39,062 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:39,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:39,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1516056936, now seen corresponding path program 1 times [2024-11-09 01:14:39,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:39,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596552434] [2024-11-09 01:14:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:39,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:14:39,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:39,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596552434] [2024-11-09 01:14:39,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596552434] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:39,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:14:39,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 01:14:39,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486834035] [2024-11-09 01:14:39,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:39,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 01:14:39,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:39,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 01:14:39,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 01:14:39,769 INFO L87 Difference]: Start difference. First operand has 1850 states, 1812 states have (on average 1.9492273730684326) internal successors, (3532), 1817 states have internal predecessors, (3532), 28 states have call successors, (28), 7 states have call predecessors, (28), 7 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2024-11-09 01:14:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:41,131 INFO L93 Difference]: Finished difference Result 3883 states and 7486 transitions. [2024-11-09 01:14:41,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 01:14:41,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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 [2024-11-09 01:14:41,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:41,160 INFO L225 Difference]: With dead ends: 3883 [2024-11-09 01:14:41,161 INFO L226 Difference]: Without dead ends: 2032 [2024-11-09 01:14:41,171 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 [2024-11-09 01:14:41,175 INFO L432 NwaCegarLoop]: 3545 mSDtfsCounter, 3813 mSDsluCounter, 3445 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3813 SdHoareTripleChecker+Valid, 6990 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:41,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3813 Valid, 6990 Invalid, 742 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 01:14:41,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2024-11-09 01:14:41,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2031. [2024-11-09 01:14:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1967 states have (on average 1.907473309608541) internal successors, (3752), 1971 states have internal predecessors, (3752), 50 states have call successors, (50), 13 states have call predecessors, (50), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-09 01:14:41,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 3850 transitions. [2024-11-09 01:14:41,348 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 3850 transitions. Word has length 68 [2024-11-09 01:14:41,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:41,349 INFO L471 AbstractCegarLoop]: Abstraction has 2031 states and 3850 transitions. [2024-11-09 01:14:41,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 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) [2024-11-09 01:14:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 3850 transitions. [2024-11-09 01:14:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 01:14:41,364 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:41,365 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] [2024-11-09 01:14:41,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:14:41,365 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:41,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:41,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1224668268, now seen corresponding path program 1 times [2024-11-09 01:14:41,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:41,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825420350] [2024-11-09 01:14:41,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:41,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 01:14:41,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:41,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825420350] [2024-11-09 01:14:41,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825420350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:41,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588665038] [2024-11-09 01:14:41,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:41,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:41,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:41,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:41,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:14:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:42,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:14:42,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 01:14:42,306 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:14:42,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588665038] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:42,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:14:42,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 01:14:42,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647322896] [2024-11-09 01:14:42,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:42,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:42,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:42,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:42,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:42,312 INFO L87 Difference]: Start difference. First operand 2031 states and 3850 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2024-11-09 01:14:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:42,949 INFO L93 Difference]: Finished difference Result 2794 states and 5017 transitions. [2024-11-09 01:14:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:42,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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 [2024-11-09 01:14:42,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:42,967 INFO L225 Difference]: With dead ends: 2794 [2024-11-09 01:14:42,968 INFO L226 Difference]: Without dead ends: 2409 [2024-11-09 01:14:42,971 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 [2024-11-09 01:14:42,973 INFO L432 NwaCegarLoop]: 3371 mSDtfsCounter, 3528 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3528 SdHoareTripleChecker+Valid, 3617 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:42,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3528 Valid, 3617 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:14:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2409 states. [2024-11-09 01:14:43,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2409 to 2403. [2024-11-09 01:14:43,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2403 states, 2285 states have (on average 1.8472647702407001) internal successors, (4221), 2290 states have internal predecessors, (4221), 92 states have call successors, (92), 25 states have call predecessors, (92), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2024-11-09 01:14:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 4403 transitions. [2024-11-09 01:14:43,086 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 4403 transitions. Word has length 138 [2024-11-09 01:14:43,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:43,087 INFO L471 AbstractCegarLoop]: Abstraction has 2403 states and 4403 transitions. [2024-11-09 01:14:43,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 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) [2024-11-09 01:14:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 4403 transitions. [2024-11-09 01:14:43,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 01:14:43,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:43,091 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] [2024-11-09 01:14:43,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 01:14:43,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:43,295 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:43,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:43,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2120141708, now seen corresponding path program 1 times [2024-11-09 01:14:43,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:43,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236194292] [2024-11-09 01:14:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:43,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 01:14:43,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:43,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236194292] [2024-11-09 01:14:43,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236194292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:43,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967777678] [2024-11-09 01:14:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:43,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:43,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:43,695 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:43,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:14:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:43,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:14:43,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 01:14:44,005 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:14:44,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967777678] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:44,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:14:44,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 01:14:44,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410049590] [2024-11-09 01:14:44,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:44,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:44,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:44,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:44,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:44,011 INFO L87 Difference]: Start difference. First operand 2403 states and 4403 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) [2024-11-09 01:14:44,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:44,626 INFO L93 Difference]: Finished difference Result 3904 states and 6694 transitions. [2024-11-09 01:14:44,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:44,626 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 [2024-11-09 01:14:44,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:44,641 INFO L225 Difference]: With dead ends: 3904 [2024-11-09 01:14:44,641 INFO L226 Difference]: Without dead ends: 3147 [2024-11-09 01:14:44,645 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 [2024-11-09 01:14:44,646 INFO L432 NwaCegarLoop]: 3351 mSDtfsCounter, 3546 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3546 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:44,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3546 Valid, 3597 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:14:44,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2024-11-09 01:14:44,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 3139. [2024-11-09 01:14:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3139 states, 2915 states have (on average 1.7656946826758146) internal successors, (5147), 2922 states have internal predecessors, (5147), 174 states have call successors, (174), 49 states have call predecessors, (174), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2024-11-09 01:14:44,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 5493 transitions. [2024-11-09 01:14:44,757 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 5493 transitions. Word has length 138 [2024-11-09 01:14:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:44,758 INFO L471 AbstractCegarLoop]: Abstraction has 3139 states and 5493 transitions. [2024-11-09 01:14:44,758 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) [2024-11-09 01:14:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 5493 transitions. [2024-11-09 01:14:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 01:14:44,763 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:44,763 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] [2024-11-09 01:14:44,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:14:44,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:44,965 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:44,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:44,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2023548244, now seen corresponding path program 1 times [2024-11-09 01:14:44,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:44,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319414420] [2024-11-09 01:14:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:44,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 01:14:45,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:45,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319414420] [2024-11-09 01:14:45,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319414420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49996109] [2024-11-09 01:14:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:45,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:45,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:45,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:45,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:14:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:45,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:14:45,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:45,502 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 01:14:45,502 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:14:45,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49996109] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:45,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:14:45,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 01:14:45,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002135086] [2024-11-09 01:14:45,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:45,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:45,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:45,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:45,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:45,505 INFO L87 Difference]: Start difference. First operand 3139 states and 5493 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2024-11-09 01:14:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:46,108 INFO L93 Difference]: Finished difference Result 6100 states and 9998 transitions. [2024-11-09 01:14:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:46,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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 [2024-11-09 01:14:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:46,130 INFO L225 Difference]: With dead ends: 6100 [2024-11-09 01:14:46,131 INFO L226 Difference]: Without dead ends: 4607 [2024-11-09 01:14:46,137 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 [2024-11-09 01:14:46,138 INFO L432 NwaCegarLoop]: 3310 mSDtfsCounter, 3540 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3540 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:46,139 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3540 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:14:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4607 states. [2024-11-09 01:14:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4607 to 4595. [2024-11-09 01:14:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4163 states have (on average 1.675474417487389) internal successors, (6975), 4174 states have internal predecessors, (6975), 334 states have call successors, (334), 97 states have call predecessors, (334), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2024-11-09 01:14:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7641 transitions. [2024-11-09 01:14:46,313 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7641 transitions. Word has length 138 [2024-11-09 01:14:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:46,314 INFO L471 AbstractCegarLoop]: Abstraction has 4595 states and 7641 transitions. [2024-11-09 01:14:46,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 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) [2024-11-09 01:14:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7641 transitions. [2024-11-09 01:14:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 01:14:46,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:46,322 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] [2024-11-09 01:14:46,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 01:14:46,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:46,523 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:46,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:46,524 INFO L85 PathProgramCache]: Analyzing trace with hash -2129051188, now seen corresponding path program 1 times [2024-11-09 01:14:46,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:46,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779280748] [2024-11-09 01:14:46,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:46,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 01:14:46,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:46,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779280748] [2024-11-09 01:14:46,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779280748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:46,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645120864] [2024-11-09 01:14:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:46,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:46,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:46,722 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:46,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:14:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:46,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:14:46,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:47,001 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 01:14:47,001 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:14:47,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645120864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:47,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:14:47,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 01:14:47,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93664097] [2024-11-09 01:14:47,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:47,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:47,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:47,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:47,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:47,003 INFO L87 Difference]: Start difference. First operand 4595 states and 7641 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2024-11-09 01:14:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:47,685 INFO L93 Difference]: Finished difference Result 10444 states and 16506 transitions. [2024-11-09 01:14:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:47,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 [2024-11-09 01:14:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:47,722 INFO L225 Difference]: With dead ends: 10444 [2024-11-09 01:14:47,722 INFO L226 Difference]: Without dead ends: 7495 [2024-11-09 01:14:47,735 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 [2024-11-09 01:14:47,736 INFO L432 NwaCegarLoop]: 3365 mSDtfsCounter, 3549 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3549 SdHoareTripleChecker+Valid, 3611 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:47,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3549 Valid, 3611 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:14:47,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7495 states. [2024-11-09 01:14:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7495 to 7475. [2024-11-09 01:14:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7475 states, 6635 states have (on average 1.5950263752825924) internal successors, (10583), 6654 states have internal predecessors, (10583), 646 states have call successors, (646), 193 states have call predecessors, (646), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2024-11-09 01:14:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7475 states to 7475 states and 11873 transitions. [2024-11-09 01:14:48,029 INFO L78 Accepts]: Start accepts. Automaton has 7475 states and 11873 transitions. Word has length 138 [2024-11-09 01:14:48,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:48,029 INFO L471 AbstractCegarLoop]: Abstraction has 7475 states and 11873 transitions. [2024-11-09 01:14:48,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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) [2024-11-09 01:14:48,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7475 states and 11873 transitions. [2024-11-09 01:14:48,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 01:14:48,041 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:48,041 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] [2024-11-09 01:14:48,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 01:14:48,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:48,242 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:48,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:48,243 INFO L85 PathProgramCache]: Analyzing trace with hash -846389588, now seen corresponding path program 1 times [2024-11-09 01:14:48,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:48,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892835384] [2024-11-09 01:14:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:48,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 01:14:48,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:48,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892835384] [2024-11-09 01:14:48,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892835384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:48,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362139499] [2024-11-09 01:14:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:48,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:48,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:48,473 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:48,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:14:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:48,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:14:48,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 01:14:48,798 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:14:48,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362139499] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:48,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:14:48,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 01:14:48,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962800660] [2024-11-09 01:14:48,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:48,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:48,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:48,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:48,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:48,801 INFO L87 Difference]: Start difference. First operand 7475 states and 11873 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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) [2024-11-09 01:14:49,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:49,621 INFO L93 Difference]: Finished difference Result 19036 states and 29322 transitions. [2024-11-09 01:14:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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 [2024-11-09 01:14:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:49,720 INFO L225 Difference]: With dead ends: 19036 [2024-11-09 01:14:49,721 INFO L226 Difference]: Without dead ends: 13207 [2024-11-09 01:14:49,743 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 [2024-11-09 01:14:49,745 INFO L432 NwaCegarLoop]: 3310 mSDtfsCounter, 3519 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:49,745 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:14:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13207 states. [2024-11-09 01:14:50,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13207 to 13171. [2024-11-09 01:14:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13171 states, 11531 states have (on average 1.535252796808603) internal successors, (17703), 11566 states have internal predecessors, (17703), 1254 states have call successors, (1254), 385 states have call predecessors, (1254), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2024-11-09 01:14:50,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13171 states to 13171 states and 20209 transitions. [2024-11-09 01:14:50,470 INFO L78 Accepts]: Start accepts. Automaton has 13171 states and 20209 transitions. Word has length 138 [2024-11-09 01:14:50,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:50,472 INFO L471 AbstractCegarLoop]: Abstraction has 13171 states and 20209 transitions. [2024-11-09 01:14:50,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 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) [2024-11-09 01:14:50,473 INFO L276 IsEmpty]: Start isEmpty. Operand 13171 states and 20209 transitions. [2024-11-09 01:14:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 01:14:50,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:50,494 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] [2024-11-09 01:14:50,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 01:14:50,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:50,695 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:50,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:50,696 INFO L85 PathProgramCache]: Analyzing trace with hash 659080076, now seen corresponding path program 1 times [2024-11-09 01:14:50,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:50,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733004973] [2024-11-09 01:14:50,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:50,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 01:14:50,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:50,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733004973] [2024-11-09 01:14:50,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733004973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:50,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176471857] [2024-11-09 01:14:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:50,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:50,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:50,897 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:50,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 01:14:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:51,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:14:51,134 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 01:14:51,210 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:14:51,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176471857] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:51,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:14:51,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 01:14:51,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722736155] [2024-11-09 01:14:51,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:51,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:51,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:51,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:51,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:51,214 INFO L87 Difference]: Start difference. First operand 13171 states and 20209 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) [2024-11-09 01:14:52,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:52,288 INFO L93 Difference]: Finished difference Result 36028 states and 54554 transitions. [2024-11-09 01:14:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:52,289 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 [2024-11-09 01:14:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:52,403 INFO L225 Difference]: With dead ends: 36028 [2024-11-09 01:14:52,403 INFO L226 Difference]: Without dead ends: 24503 [2024-11-09 01:14:52,450 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 [2024-11-09 01:14:52,451 INFO L432 NwaCegarLoop]: 3310 mSDtfsCounter, 3522 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3522 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:52,451 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3522 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:14:52,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24503 states. [2024-11-09 01:14:53,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24503 to 24435. [2024-11-09 01:14:53,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24435 states, 21227 states have (on average 1.495783671738823) internal successors, (31751), 21294 states have internal predecessors, (31751), 2438 states have call successors, (2438), 769 states have call predecessors, (2438), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2024-11-09 01:14:53,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24435 states to 24435 states and 36625 transitions. [2024-11-09 01:14:53,472 INFO L78 Accepts]: Start accepts. Automaton has 24435 states and 36625 transitions. Word has length 138 [2024-11-09 01:14:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:53,473 INFO L471 AbstractCegarLoop]: Abstraction has 24435 states and 36625 transitions. [2024-11-09 01:14:53,473 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) [2024-11-09 01:14:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 24435 states and 36625 transitions. [2024-11-09 01:14:53,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 01:14:53,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:53,506 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] [2024-11-09 01:14:53,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 01:14:53,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:53,707 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:53,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:53,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2057335468, now seen corresponding path program 1 times [2024-11-09 01:14:53,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:53,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035246887] [2024-11-09 01:14:53,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:53,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 01:14:54,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:14:54,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035246887] [2024-11-09 01:14:54,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035246887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:14:54,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202669644] [2024-11-09 01:14:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:54,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:54,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:14:54,091 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:14:54,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 01:14:54,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:14:54,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:14:54,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:14:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 01:14:54,423 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:14:54,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202669644] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:14:54,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:14:54,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 01:14:54,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033401377] [2024-11-09 01:14:54,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:14:54,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:14:54,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:14:54,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:14:54,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:14:54,427 INFO L87 Difference]: Start difference. First operand 24435 states and 36625 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2024-11-09 01:14:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:14:56,704 INFO L93 Difference]: Finished difference Result 69628 states and 104218 transitions. [2024-11-09 01:14:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:14:56,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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 [2024-11-09 01:14:56,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:14:56,949 INFO L225 Difference]: With dead ends: 69628 [2024-11-09 01:14:56,949 INFO L226 Difference]: Without dead ends: 46839 [2024-11-09 01:14:57,035 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 [2024-11-09 01:14:57,036 INFO L432 NwaCegarLoop]: 3310 mSDtfsCounter, 3534 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3534 SdHoareTripleChecker+Valid, 3556 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:14:57,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3534 Valid, 3556 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:14:57,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46839 states. [2024-11-09 01:14:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46839 to 46707. [2024-11-09 01:14:59,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46707 states, 40427 states have (on average 1.4708734261755758) internal successors, (59463), 40558 states have internal predecessors, (59463), 4742 states have call successors, (4742), 1537 states have call predecessors, (4742), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2024-11-09 01:14:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46707 states to 46707 states and 68945 transitions. [2024-11-09 01:14:59,381 INFO L78 Accepts]: Start accepts. Automaton has 46707 states and 68945 transitions. Word has length 138 [2024-11-09 01:14:59,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:14:59,382 INFO L471 AbstractCegarLoop]: Abstraction has 46707 states and 68945 transitions. [2024-11-09 01:14:59,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 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) [2024-11-09 01:14:59,383 INFO L276 IsEmpty]: Start isEmpty. Operand 46707 states and 68945 transitions. [2024-11-09 01:14:59,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 01:14:59,468 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:14:59,468 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] [2024-11-09 01:14:59,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 01:14:59,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:14:59,670 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:14:59,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:14:59,671 INFO L85 PathProgramCache]: Analyzing trace with hash -448106036, now seen corresponding path program 1 times [2024-11-09 01:14:59,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:14:59,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328324684] [2024-11-09 01:14:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:14:59,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:14:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-09 01:15:00,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:00,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328324684] [2024-11-09 01:15:00,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328324684] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:15:00,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:15:00,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 01:15:00,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297221601] [2024-11-09 01:15:00,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:15:00,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 01:15:00,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:00,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 01:15:00,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:15:00,357 INFO L87 Difference]: Start difference. First operand 46707 states and 68945 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 01:15:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:04,488 INFO L93 Difference]: Finished difference Result 146939 states and 215895 transitions. [2024-11-09 01:15:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 01:15:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 138 [2024-11-09 01:15:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:05,111 INFO L225 Difference]: With dead ends: 146939 [2024-11-09 01:15:05,111 INFO L226 Difference]: Without dead ends: 101879 [2024-11-09 01:15:05,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-09 01:15:05,192 INFO L432 NwaCegarLoop]: 3318 mSDtfsCounter, 4160 mSDsluCounter, 9812 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4181 SdHoareTripleChecker+Valid, 13130 SdHoareTripleChecker+Invalid, 1336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:05,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4181 Valid, 13130 Invalid, 1336 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [136 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 01:15:05,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101879 states. [2024-11-09 01:15:08,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101879 to 90227. [2024-11-09 01:15:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90227 states, 77931 states have (on average 1.4545046258870027) internal successors, (113351), 78190 states have internal predecessors, (113351), 9222 states have call successors, (9222), 3073 states have call predecessors, (9222), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2024-11-09 01:15:09,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90227 states to 90227 states and 131793 transitions. [2024-11-09 01:15:09,504 INFO L78 Accepts]: Start accepts. Automaton has 90227 states and 131793 transitions. Word has length 138 [2024-11-09 01:15:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:09,506 INFO L471 AbstractCegarLoop]: Abstraction has 90227 states and 131793 transitions. [2024-11-09 01:15:09,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 01:15:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 90227 states and 131793 transitions. [2024-11-09 01:15:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-09 01:15:09,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:09,677 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 01:15:09,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 01:15:09,678 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:09,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:09,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1105859286, now seen corresponding path program 1 times [2024-11-09 01:15:09,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:09,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984772183] [2024-11-09 01:15:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:09,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 01:15:10,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:10,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984772183] [2024-11-09 01:15:10,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984772183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:10,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708900273] [2024-11-09 01:15:10,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:10,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:10,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:10,163 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:10,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 01:15:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:10,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:15:10,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-09 01:15:10,508 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:15:10,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708900273] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:15:10,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:15:10,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 01:15:10,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222915801] [2024-11-09 01:15:10,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:15:10,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:15:10,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:10,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:15:10,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:15:10,512 INFO L87 Difference]: Start difference. First operand 90227 states and 131793 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 01:15:14,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:15:14,777 INFO L93 Difference]: Finished difference Result 160503 states and 236884 transitions. [2024-11-09 01:15:14,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:15:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 161 [2024-11-09 01:15:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:15:15,383 INFO L225 Difference]: With dead ends: 160503 [2024-11-09 01:15:15,383 INFO L226 Difference]: Without dead ends: 115187 [2024-11-09 01:15:15,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:15:15,492 INFO L432 NwaCegarLoop]: 3453 mSDtfsCounter, 137 mSDsluCounter, 3322 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 6775 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 01:15:15,494 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 6775 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 01:15:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115187 states. [2024-11-09 01:15:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115187 to 109299. [2024-11-09 01:15:19,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109299 states, 96491 states have (on average 1.48249059497777) internal successors, (143047), 96750 states have internal predecessors, (143047), 9478 states have call successors, (9478), 3329 states have call predecessors, (9478), 3328 states have return successors, (9476), 9220 states have call predecessors, (9476), 9476 states have call successors, (9476) [2024-11-09 01:15:20,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109299 states to 109299 states and 162001 transitions. [2024-11-09 01:15:20,306 INFO L78 Accepts]: Start accepts. Automaton has 109299 states and 162001 transitions. Word has length 161 [2024-11-09 01:15:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:15:20,307 INFO L471 AbstractCegarLoop]: Abstraction has 109299 states and 162001 transitions. [2024-11-09 01:15:20,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 01:15:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 109299 states and 162001 transitions. [2024-11-09 01:15:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2024-11-09 01:15:20,609 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:15:20,609 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:15:20,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 01:15:20,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:20,814 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:15:20,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:15:20,814 INFO L85 PathProgramCache]: Analyzing trace with hash -259797985, now seen corresponding path program 1 times [2024-11-09 01:15:20,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:15:20,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605609248] [2024-11-09 01:15:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:20,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:15:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-11-09 01:15:21,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:15:21,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605609248] [2024-11-09 01:15:21,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605609248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:15:21,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901533224] [2024-11-09 01:15:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:15:21,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:15:21,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:15:21,620 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:15:21,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aba246b-f311-4df9-bc34-47c6a50c55b6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 01:15:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:15:21,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 1144 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:15:21,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:15:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-09 01:15:22,173 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:15:22,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901533224] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:15:22,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:15:22,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-09 01:15:22,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582661909] [2024-11-09 01:15:22,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:15:22,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:15:22,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:15:22,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:15:22,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:15:22,177 INFO L87 Difference]: Start difference. First operand 109299 states and 162001 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)