./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.10.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.10.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX --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 d659e8678e554595f4e384a4607241da3abd2c1673f83f24796966e0172bfb33 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:01:04,126 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:01:04,217 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:01:04,222 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:01:04,223 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:01:04,264 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:01:04,265 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:01:04,266 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:01:04,267 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:01:04,274 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:01:04,274 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:01:04,276 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:01:04,276 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:01:04,278 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:01:04,278 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:01:04,278 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:01:04,279 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:01:04,279 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:01:04,279 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:01:04,280 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:01:04,281 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:01:04,281 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:01:04,282 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:01:04,283 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:01:04,283 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:01:04,284 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:01:04,284 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:01:04,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:01:04,285 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:01:04,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:01:04,286 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:01:04,286 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:01:04,287 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:01:04,287 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:01:04,287 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:01:04,287 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:01:04,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:04,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:01:04,288 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:01:04,288 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:01:04,288 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:01:04,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:01:04,289 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:01:04,289 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:01:04,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:01:04,290 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_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d659e8678e554595f4e384a4607241da3abd2c1673f83f24796966e0172bfb33 [2023-11-12 01:01:04,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:01:04,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:01:04,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:01:04,643 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:01:04,644 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:01:04,646 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/Problem05_label47+token_ring.10.cil-2.c [2023-11-12 01:01:07,920 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:01:08,812 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:01:08,812 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/sv-benchmarks/c/combinations/Problem05_label47+token_ring.10.cil-2.c [2023-11-12 01:01:08,879 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/data/b5fea2d46/09d42b25015241ee9d2d1d9b2796a573/FLAGcfa021c65 [2023-11-12 01:01:08,900 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/data/b5fea2d46/09d42b25015241ee9d2d1d9b2796a573 [2023-11-12 01:01:08,908 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:01:08,911 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:01:08,913 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:08,913 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:01:08,919 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:01:08,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:08" (1/1) ... [2023-11-12 01:01:08,922 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b766e66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:08, skipping insertion in model container [2023-11-12 01:01:08,922 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:01:08" (1/1) ... [2023-11-12 01:01:09,260 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:01:11,915 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/sv-benchmarks/c/combinations/Problem05_label47+token_ring.10.cil-2.c[377612,377625] [2023-11-12 01:01:11,951 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/sv-benchmarks/c/combinations/Problem05_label47+token_ring.10.cil-2.c[383339,383352] [2023-11-12 01:01:12,306 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:01:12,324 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:01:13,671 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/sv-benchmarks/c/combinations/Problem05_label47+token_ring.10.cil-2.c[377612,377625] [2023-11-12 01:01:13,683 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/sv-benchmarks/c/combinations/Problem05_label47+token_ring.10.cil-2.c[383339,383352] [2023-11-12 01:01:13,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:01:13,908 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:01:13,909 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13 WrapperNode [2023-11-12 01:01:13,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:01:13,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:13,911 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:01:13,911 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:01:13,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13" (1/1) ... [2023-11-12 01:01:14,012 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13" (1/1) ... [2023-11-12 01:01:14,445 INFO L138 Inliner]: procedures = 64, calls = 71, calls flagged for inlining = 42, calls inlined = 42, statements flattened = 13108 [2023-11-12 01:01:14,446 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:01:14,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:01:14,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:01:14,447 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:01:14,458 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13" (1/1) ... [2023-11-12 01:01:14,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13" (1/1) ... [2023-11-12 01:01:14,542 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13" (1/1) ... [2023-11-12 01:01:14,542 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13" (1/1) ... [2023-11-12 01:01:14,882 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13" (1/1) ... [2023-11-12 01:01:14,953 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13" (1/1) ... [2023-11-12 01:01:14,976 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13" (1/1) ... [2023-11-12 01:01:14,999 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13" (1/1) ... [2023-11-12 01:01:15,162 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:01:15,170 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:01:15,171 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:01:15,171 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:01:15,172 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13" (1/1) ... [2023-11-12 01:01:15,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:01:15,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:15,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:01:15,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:01:15,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:01:15,379 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 01:01:15,379 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 01:01:15,379 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 01:01:15,379 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 01:01:15,380 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 01:01:15,380 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 01:01:15,380 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 01:01:15,380 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 01:01:15,380 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 01:01:15,381 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 01:01:15,381 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 01:01:15,381 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 01:01:15,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:01:15,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:01:15,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:01:15,653 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:01:15,658 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:01:26,052 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:01:29,216 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:01:29,217 INFO L302 CfgBuilder]: Removed 14 assume(true) statements. [2023-11-12 01:01:29,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:29 BoogieIcfgContainer [2023-11-12 01:01:29,224 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:01:29,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:01:29,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:01:29,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:01:29,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:01:08" (1/3) ... [2023-11-12 01:01:29,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32fc9f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:29, skipping insertion in model container [2023-11-12 01:01:29,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:01:13" (2/3) ... [2023-11-12 01:01:29,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32fc9f22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:01:29, skipping insertion in model container [2023-11-12 01:01:29,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:01:29" (3/3) ... [2023-11-12 01:01:29,234 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label47+token_ring.10.cil-2.c [2023-11-12 01:01:29,253 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:01:29,253 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 01:01:29,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:01:29,375 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@283df44a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:01:29,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 01:01:29,390 INFO L276 IsEmpty]: Start isEmpty. Operand has 1820 states, 1787 states have (on average 1.9541130386121992) internal successors, (3492), 1790 states have internal predecessors, (3492), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-12 01:01:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-12 01:01:29,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:29,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:29,406 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:29,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1070862731, now seen corresponding path program 1 times [2023-11-12 01:01:29,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:29,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553489120] [2023-11-12 01:01:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:29,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:01:30,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:30,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553489120] [2023-11-12 01:01:30,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553489120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:30,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:30,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:01:30,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357467269] [2023-11-12 01:01:30,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:30,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:01:30,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:30,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:01:30,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:01:30,153 INFO L87 Difference]: Start difference. First operand has 1820 states, 1787 states have (on average 1.9541130386121992) internal successors, (3492), 1790 states have internal predecessors, (3492), 24 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 01:01:31,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:31,514 INFO L93 Difference]: Finished difference Result 3800 states and 7348 transitions. [2023-11-12 01:01:31,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:01:31,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2023-11-12 01:01:31,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:31,561 INFO L225 Difference]: With dead ends: 3800 [2023-11-12 01:01:31,561 INFO L226 Difference]: Without dead ends: 1979 [2023-11-12 01:01:31,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:01:31,575 INFO L413 NwaCegarLoop]: 3473 mSDtfsCounter, 3735 mSDsluCounter, 3383 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3735 SdHoareTripleChecker+Valid, 6856 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:31,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3735 Valid, 6856 Invalid, 708 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-12 01:01:31,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2023-11-12 01:01:31,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1978. [2023-11-12 01:01:31,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1920 states have (on average 1.915625) internal successors, (3678), 1923 states have internal predecessors, (3678), 44 states have call successors, (44), 12 states have call predecessors, (44), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2023-11-12 01:01:31,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3766 transitions. [2023-11-12 01:01:31,775 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3766 transitions. Word has length 61 [2023-11-12 01:01:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:31,775 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 3766 transitions. [2023-11-12 01:01:31,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 01:01:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3766 transitions. [2023-11-12 01:01:31,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 01:01:31,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:31,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:31,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:01:31,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:31,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:31,789 INFO L85 PathProgramCache]: Analyzing trace with hash 609629562, now seen corresponding path program 1 times [2023-11-12 01:01:31,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:31,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459967825] [2023-11-12 01:01:31,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:31,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:32,220 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 01:01:32,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:32,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459967825] [2023-11-12 01:01:32,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459967825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:32,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371038906] [2023-11-12 01:01:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:32,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:32,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:32,233 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:32,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:01:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:32,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:01:32,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 01:01:32,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:32,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371038906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:32,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:32,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 01:01:32,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907760728] [2023-11-12 01:01:32,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:32,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:32,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:32,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:32,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:32,607 INFO L87 Difference]: Start difference. First operand 1978 states and 3766 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:01:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:33,191 INFO L93 Difference]: Finished difference Result 2635 states and 4761 transitions. [2023-11-12 01:01:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:33,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2023-11-12 01:01:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:33,211 INFO L225 Difference]: With dead ends: 2635 [2023-11-12 01:01:33,212 INFO L226 Difference]: Without dead ends: 2303 [2023-11-12 01:01:33,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:33,216 INFO L413 NwaCegarLoop]: 3319 mSDtfsCounter, 3482 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:33,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3482 Valid, 3525 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:01:33,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2023-11-12 01:01:33,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 2299. [2023-11-12 01:01:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2191 states have (on average 1.8589685075308078) internal successors, (4073), 2195 states have internal predecessors, (4073), 82 states have call successors, (82), 24 states have call predecessors, (82), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2023-11-12 01:01:33,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 4237 transitions. [2023-11-12 01:01:33,332 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 4237 transitions. Word has length 123 [2023-11-12 01:01:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:33,332 INFO L495 AbstractCegarLoop]: Abstraction has 2299 states and 4237 transitions. [2023-11-12 01:01:33,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:01:33,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 4237 transitions. [2023-11-12 01:01:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 01:01:33,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:33,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:33,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:33,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:33,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:33,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2058759962, now seen corresponding path program 1 times [2023-11-12 01:01:33,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:33,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329279931] [2023-11-12 01:01:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:33,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 01:01:33,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:33,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329279931] [2023-11-12 01:01:33,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329279931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:33,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808886867] [2023-11-12 01:01:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:33,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:33,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:33,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:33,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:01:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:34,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:01:34,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 01:01:34,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:34,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808886867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:34,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:34,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 01:01:34,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198250483] [2023-11-12 01:01:34,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:34,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:34,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:34,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:34,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:34,177 INFO L87 Difference]: Start difference. First operand 2299 states and 4237 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:01:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:35,089 INFO L93 Difference]: Finished difference Result 3592 states and 6188 transitions. [2023-11-12 01:01:35,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:35,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2023-11-12 01:01:35,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:35,110 INFO L225 Difference]: With dead ends: 3592 [2023-11-12 01:01:35,110 INFO L226 Difference]: Without dead ends: 2939 [2023-11-12 01:01:35,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:35,115 INFO L413 NwaCegarLoop]: 3317 mSDtfsCounter, 3494 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3494 SdHoareTripleChecker+Valid, 3523 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:35,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3494 Valid, 3523 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 01:01:35,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2939 states. [2023-11-12 01:01:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2939 to 2933. [2023-11-12 01:01:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2933 states, 2727 states have (on average 1.778877887788779) internal successors, (4851), 2733 states have internal predecessors, (4851), 156 states have call successors, (156), 48 states have call predecessors, (156), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2023-11-12 01:01:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 5163 transitions. [2023-11-12 01:01:35,246 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 5163 transitions. Word has length 123 [2023-11-12 01:01:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:35,247 INFO L495 AbstractCegarLoop]: Abstraction has 2933 states and 5163 transitions. [2023-11-12 01:01:35,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:01:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 5163 transitions. [2023-11-12 01:01:35,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 01:01:35,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:35,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:35,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:35,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:35,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:35,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:35,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1110656838, now seen corresponding path program 1 times [2023-11-12 01:01:35,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:35,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325816150] [2023-11-12 01:01:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:35,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 01:01:35,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:35,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325816150] [2023-11-12 01:01:35,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325816150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:35,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976822477] [2023-11-12 01:01:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:35,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:35,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:35,687 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:35,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:01:35,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:35,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:01:35,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-12 01:01:35,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:35,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976822477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:35,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:35,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 01:01:35,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425163270] [2023-11-12 01:01:35,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:35,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:35,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:35,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:35,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:35,991 INFO L87 Difference]: Start difference. First operand 2933 states and 5163 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:01:36,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:36,656 INFO L93 Difference]: Finished difference Result 5482 states and 8992 transitions. [2023-11-12 01:01:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:36,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2023-11-12 01:01:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:36,689 INFO L225 Difference]: With dead ends: 5482 [2023-11-12 01:01:36,689 INFO L226 Difference]: Without dead ends: 4195 [2023-11-12 01:01:36,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:36,700 INFO L413 NwaCegarLoop]: 3297 mSDtfsCounter, 3500 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3500 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:36,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3500 Valid, 3503 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:01:36,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2023-11-12 01:01:36,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4185. [2023-11-12 01:01:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3787 states have (on average 1.6855030367045154) internal successors, (6383), 3797 states have internal predecessors, (6383), 300 states have call successors, (300), 96 states have call predecessors, (300), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2023-11-12 01:01:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 6983 transitions. [2023-11-12 01:01:36,919 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 6983 transitions. Word has length 123 [2023-11-12 01:01:36,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:36,919 INFO L495 AbstractCegarLoop]: Abstraction has 4185 states and 6983 transitions. [2023-11-12 01:01:36,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:01:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 6983 transitions. [2023-11-12 01:01:36,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 01:01:36,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:36,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:36,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:37,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:37,138 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:37,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:37,138 INFO L85 PathProgramCache]: Analyzing trace with hash 503155290, now seen corresponding path program 1 times [2023-11-12 01:01:37,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:37,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833090307] [2023-11-12 01:01:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:37,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 01:01:37,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:37,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833090307] [2023-11-12 01:01:37,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833090307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:37,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224674003] [2023-11-12 01:01:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:37,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:37,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:37,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:37,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 01:01:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:37,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:01:37,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 01:01:37,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:37,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224674003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:37,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:37,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 01:01:37,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231722258] [2023-11-12 01:01:37,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:37,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:37,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:37,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:37,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:37,653 INFO L87 Difference]: Start difference. First operand 4185 states and 6983 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:01:38,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:38,380 INFO L93 Difference]: Finished difference Result 9214 states and 14500 transitions. [2023-11-12 01:01:38,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:38,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2023-11-12 01:01:38,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:38,430 INFO L225 Difference]: With dead ends: 9214 [2023-11-12 01:01:38,431 INFO L226 Difference]: Without dead ends: 6675 [2023-11-12 01:01:38,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:38,445 INFO L413 NwaCegarLoop]: 3313 mSDtfsCounter, 3503 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3503 SdHoareTripleChecker+Valid, 3519 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:38,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3503 Valid, 3519 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:01:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6675 states. [2023-11-12 01:01:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6675 to 6657. [2023-11-12 01:01:38,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 5883 states have (on average 1.5976542580316164) internal successors, (9399), 5901 states have internal predecessors, (9399), 580 states have call successors, (580), 192 states have call predecessors, (580), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2023-11-12 01:01:38,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 10559 transitions. [2023-11-12 01:01:38,780 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 10559 transitions. Word has length 123 [2023-11-12 01:01:38,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:38,780 INFO L495 AbstractCegarLoop]: Abstraction has 6657 states and 10559 transitions. [2023-11-12 01:01:38,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:01:38,781 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 10559 transitions. [2023-11-12 01:01:38,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 01:01:38,794 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:38,794 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:38,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:39,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:39,002 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:39,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:39,003 INFO L85 PathProgramCache]: Analyzing trace with hash -283650886, now seen corresponding path program 1 times [2023-11-12 01:01:39,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:39,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919772034] [2023-11-12 01:01:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:39,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 01:01:39,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:39,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919772034] [2023-11-12 01:01:39,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919772034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:01:39,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485847342] [2023-11-12 01:01:39,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:39,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:39,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:01:39,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:01:39,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 01:01:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:39,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 01:01:39,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:01:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 01:01:39,687 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:01:39,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485847342] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:39,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:01:39,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 01:01:39,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535988172] [2023-11-12 01:01:39,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:39,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 01:01:39,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:39,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 01:01:39,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:39,699 INFO L87 Difference]: Start difference. First operand 6657 states and 10559 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:01:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:40,554 INFO L93 Difference]: Finished difference Result 16582 states and 25316 transitions. [2023-11-12 01:01:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 01:01:40,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 123 [2023-11-12 01:01:40,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:40,658 INFO L225 Difference]: With dead ends: 16582 [2023-11-12 01:01:40,659 INFO L226 Difference]: Without dead ends: 11571 [2023-11-12 01:01:40,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:40,688 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 3488 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3488 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:40,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3488 Valid, 3476 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 01:01:40,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11571 states. [2023-11-12 01:01:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11571 to 11537. [2023-11-12 01:01:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11537 states, 10027 states have (on average 1.5293706991123965) internal successors, (15335), 10061 states have internal predecessors, (15335), 1124 states have call successors, (1124), 384 states have call predecessors, (1124), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2023-11-12 01:01:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11537 states to 11537 states and 17583 transitions. [2023-11-12 01:01:41,227 INFO L78 Accepts]: Start accepts. Automaton has 11537 states and 17583 transitions. Word has length 123 [2023-11-12 01:01:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:41,229 INFO L495 AbstractCegarLoop]: Abstraction has 11537 states and 17583 transitions. [2023-11-12 01:01:41,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 01:01:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 11537 states and 17583 transitions. [2023-11-12 01:01:41,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-12 01:01:41,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:41,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:41,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 01:01:41,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab717d8f-5294-45d2-a469-489c1bb5d332/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:01:41,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:41,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:41,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1044507046, now seen corresponding path program 1 times [2023-11-12 01:01:41,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:41,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625980755] [2023-11-12 01:01:41,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:41,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:42,195 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 01:01:42,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625980755] [2023-11-12 01:01:42,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625980755] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:42,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:42,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:01:42,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238099196] [2023-11-12 01:01:42,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:42,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:01:42,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:42,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:01:42,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:42,199 INFO L87 Difference]: Start difference. First operand 11537 states and 17583 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 01:01:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:44,508 INFO L93 Difference]: Finished difference Result 26773 states and 39857 transitions. [2023-11-12 01:01:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:01:44,510 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2023-11-12 01:01:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:01:44,604 INFO L225 Difference]: With dead ends: 26773 [2023-11-12 01:01:44,604 INFO L226 Difference]: Without dead ends: 16883 [2023-11-12 01:01:44,644 INFO L412 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 [2023-11-12 01:01:44,645 INFO L413 NwaCegarLoop]: 3274 mSDtfsCounter, 3956 mSDsluCounter, 9688 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3962 SdHoareTripleChecker+Valid, 12962 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 01:01:44,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3962 Valid, 12962 Invalid, 1282 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [110 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-12 01:01:44,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16883 states. [2023-11-12 01:01:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16883 to 16353. [2023-11-12 01:01:45,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16353 states, 14107 states have (on average 1.4987594811086695) internal successors, (21143), 14157 states have internal predecessors, (21143), 1668 states have call successors, (1668), 576 states have call predecessors, (1668), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2023-11-12 01:01:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16353 states to 16353 states and 24479 transitions. [2023-11-12 01:01:45,831 INFO L78 Accepts]: Start accepts. Automaton has 16353 states and 24479 transitions. Word has length 123 [2023-11-12 01:01:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:01:45,832 INFO L495 AbstractCegarLoop]: Abstraction has 16353 states and 24479 transitions. [2023-11-12 01:01:45,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 01:01:45,833 INFO L276 IsEmpty]: Start isEmpty. Operand 16353 states and 24479 transitions. [2023-11-12 01:01:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-12 01:01:45,879 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:01:45,879 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:01:45,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 01:01:45,880 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:01:45,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:01:45,882 INFO L85 PathProgramCache]: Analyzing trace with hash 640475231, now seen corresponding path program 1 times [2023-11-12 01:01:45,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:01:45,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341720357] [2023-11-12 01:01:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:01:45,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:01:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:01:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-12 01:01:46,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:01:46,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341720357] [2023-11-12 01:01:46,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341720357] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:01:46,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:01:46,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 01:01:46,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873620953] [2023-11-12 01:01:46,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:01:46,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 01:01:46,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:01:46,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 01:01:46,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 01:01:46,806 INFO L87 Difference]: Start difference. First operand 16353 states and 24479 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-12 01:01:49,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:01:49,229 INFO L93 Difference]: Finished difference Result 48901 states and 71809 transitions. [2023-11-12 01:01:49,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 01:01:49,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2023-11-12 01:01:49,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted.