./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.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_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/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_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/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_fdfa6a4c-967b-41a9-9766-c2124018efcd/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 343a266e04a35949615e598ecd53205cd1ef95f44fcd29af6bf4976fff243198 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:56:05,210 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:56:05,283 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:56:05,288 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:56:05,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:56:05,315 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:56:05,316 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:56:05,316 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:56:05,317 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:56:05,318 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:56:05,318 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:56:05,319 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:56:05,320 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:56:05,320 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:56:05,321 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:56:05,322 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:56:05,322 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:56:05,323 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:56:05,323 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:56:05,324 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:56:05,325 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:56:05,326 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:56:05,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:56:05,327 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:56:05,328 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:56:05,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:56:05,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:56:05,330 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:56:05,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:56:05,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:56:05,332 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:56:05,332 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:56:05,333 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:56:05,333 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:56:05,334 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:56:05,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:56:05,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:05,335 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:56:05,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:56:05,336 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:56:05,336 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:56:05,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:56:05,338 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:56:05,338 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:56:05,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:56:05,339 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_fdfa6a4c-967b-41a9-9766-c2124018efcd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 343a266e04a35949615e598ecd53205cd1ef95f44fcd29af6bf4976fff243198 [2023-11-12 00:56:05,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:56:05,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:56:05,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:56:05,661 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:56:05,662 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:56:05,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c [2023-11-12 00:56:08,859 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:56:09,664 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:56:09,665 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c [2023-11-12 00:56:09,722 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/data/bf89be903/9b25e4cb5a9641bda99150fa091bcf0d/FLAGac3d75190 [2023-11-12 00:56:09,738 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/data/bf89be903/9b25e4cb5a9641bda99150fa091bcf0d [2023-11-12 00:56:09,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:56:09,747 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:56:09,750 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:09,750 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:56:09,756 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:56:09,758 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:09" (1/1) ... [2023-11-12 00:56:09,760 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e04bff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:09, skipping insertion in model container [2023-11-12 00:56:09,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:56:09" (1/1) ... [2023-11-12 00:56:10,105 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:56:12,393 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_fdfa6a4c-967b-41a9-9766-c2124018efcd/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c[381679,381692] [2023-11-12 00:56:12,422 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_fdfa6a4c-967b-41a9-9766-c2124018efcd/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c[383339,383352] [2023-11-12 00:56:12,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:12,739 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:56:13,900 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_fdfa6a4c-967b-41a9-9766-c2124018efcd/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c[381679,381692] [2023-11-12 00:56:13,905 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_fdfa6a4c-967b-41a9-9766-c2124018efcd/sv-benchmarks/c/combinations/Problem05_label43+token_ring.08.cil-2.c[383339,383352] [2023-11-12 00:56:13,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:56:14,008 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:56:14,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14 WrapperNode [2023-11-12 00:56:14,009 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:56:14,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:14,011 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:56:14,011 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:56:14,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14" (1/1) ... [2023-11-12 00:56:14,105 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14" (1/1) ... [2023-11-12 00:56:14,433 INFO L138 Inliner]: procedures = 60, calls = 66, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 12994 [2023-11-12 00:56:14,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:56:14,434 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:56:14,434 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:56:14,435 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:56:14,444 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14" (1/1) ... [2023-11-12 00:56:14,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14" (1/1) ... [2023-11-12 00:56:14,496 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14" (1/1) ... [2023-11-12 00:56:14,496 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14" (1/1) ... [2023-11-12 00:56:14,777 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14" (1/1) ... [2023-11-12 00:56:14,915 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14" (1/1) ... [2023-11-12 00:56:14,945 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14" (1/1) ... [2023-11-12 00:56:14,971 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14" (1/1) ... [2023-11-12 00:56:15,049 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:56:15,051 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:56:15,051 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:56:15,052 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:56:15,053 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14" (1/1) ... [2023-11-12 00:56:15,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:56:15,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:56:15,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:56:15,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:56:15,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:56:15,168 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:56:15,169 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:56:15,170 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 00:56:15,171 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 00:56:15,171 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:56:15,178 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:56:15,179 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-12 00:56:15,179 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-12 00:56:15,179 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:56:15,179 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:56:15,179 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:56:15,180 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:56:15,180 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:56:15,180 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:56:15,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:56:15,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:56:15,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:56:15,391 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:56:15,393 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:56:24,879 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:56:27,308 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:56:27,309 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-12 00:56:27,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:27 BoogieIcfgContainer [2023-11-12 00:56:27,315 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:56:27,318 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:56:27,318 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:56:27,321 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:56:27,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:56:09" (1/3) ... [2023-11-12 00:56:27,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d586c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:27, skipping insertion in model container [2023-11-12 00:56:27,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:56:14" (2/3) ... [2023-11-12 00:56:27,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d586c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:56:27, skipping insertion in model container [2023-11-12 00:56:27,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:56:27" (3/3) ... [2023-11-12 00:56:27,325 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.08.cil-2.c [2023-11-12 00:56:27,347 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:56:27,347 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:56:27,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:56:27,451 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;@5008ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:56:27,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:56:27,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 1802 states, 1768 states have (on average 1.9592760180995474) internal successors, (3464), 1773 states have internal predecessors, (3464), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2023-11-12 00:56:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-12 00:56:27,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:27,479 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] [2023-11-12 00:56:27,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:27,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:27,485 INFO L85 PathProgramCache]: Analyzing trace with hash -161691507, now seen corresponding path program 1 times [2023-11-12 00:56:27,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:27,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993868160] [2023-11-12 00:56:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:27,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:28,070 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 00:56:28,071 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:28,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993868160] [2023-11-12 00:56:28,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993868160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:28,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:28,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:56:28,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150804557] [2023-11-12 00:56:28,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:28,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:56:28,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:28,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:56:28,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:56:28,134 INFO L87 Difference]: Start difference. First operand has 1802 states, 1768 states have (on average 1.9592760180995474) internal successors, (3464), 1773 states have internal predecessors, (3464), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:29,220 INFO L93 Difference]: Finished difference Result 3739 states and 7250 transitions. [2023-11-12 00:56:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:56:29,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2023-11-12 00:56:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:29,250 INFO L225 Difference]: With dead ends: 3739 [2023-11-12 00:56:29,250 INFO L226 Difference]: Without dead ends: 1936 [2023-11-12 00:56:29,263 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 00:56:29,266 INFO L413 NwaCegarLoop]: 3416 mSDtfsCounter, 3673 mSDsluCounter, 3332 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3673 SdHoareTripleChecker+Valid, 6748 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:29,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3673 Valid, 6748 Invalid, 680 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 00:56:29,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2023-11-12 00:56:29,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1935. [2023-11-12 00:56:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1879 states have (on average 1.9244278871740288) internal successors, (3616), 1883 states have internal predecessors, (3616), 42 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-12 00:56:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 3698 transitions. [2023-11-12 00:56:29,450 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 3698 transitions. Word has length 56 [2023-11-12 00:56:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:29,451 INFO L495 AbstractCegarLoop]: Abstraction has 1935 states and 3698 transitions. [2023-11-12 00:56:29,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:56:29,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 3698 transitions. [2023-11-12 00:56:29,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 00:56:29,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:29,461 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:56:29,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:56:29,462 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:29,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:29,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2046276564, now seen corresponding path program 1 times [2023-11-12 00:56:29,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:29,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137148423] [2023-11-12 00:56:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:29,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:56:29,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:29,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137148423] [2023-11-12 00:56:29,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137148423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:56:29,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162230913] [2023-11-12 00:56:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:29,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:56:29,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:56:29,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:56:29,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:56:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:30,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:56:30,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:56:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-12 00:56:30,318 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:56:30,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162230913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:30,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:56:30,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:56:30,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164394385] [2023-11-12 00:56:30,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:30,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:30,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:30,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:30,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:30,326 INFO L87 Difference]: Start difference. First operand 1935 states and 3698 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:56:30,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:30,864 INFO L93 Difference]: Finished difference Result 2506 states and 4553 transitions. [2023-11-12 00:56:30,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:30,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-11-12 00:56:30,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:30,884 INFO L225 Difference]: With dead ends: 2506 [2023-11-12 00:56:30,885 INFO L226 Difference]: Without dead ends: 2217 [2023-11-12 00:56:30,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 00:56:30,889 INFO L413 NwaCegarLoop]: 3297 mSDtfsCounter, 3464 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 3478 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:30,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3464 Valid, 3478 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:56:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2023-11-12 00:56:30,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2211. [2023-11-12 00:56:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2109 states have (on average 1.8724513987671882) internal successors, (3949), 2114 states have internal predecessors, (3949), 76 states have call successors, (76), 25 states have call predecessors, (76), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2023-11-12 00:56:31,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 4099 transitions. [2023-11-12 00:56:31,001 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 4099 transitions. Word has length 110 [2023-11-12 00:56:31,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:31,001 INFO L495 AbstractCegarLoop]: Abstraction has 2211 states and 4099 transitions. [2023-11-12 00:56:31,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:56:31,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 4099 transitions. [2023-11-12 00:56:31,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 00:56:31,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:31,012 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:56:31,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:56:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:56:31,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:31,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash 836856268, now seen corresponding path program 1 times [2023-11-12 00:56:31,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:31,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905711859] [2023-11-12 00:56:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:31,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:56:31,461 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:31,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905711859] [2023-11-12 00:56:31,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905711859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:56:31,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263408844] [2023-11-12 00:56:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:31,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:56:31,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:56:31,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:56:31,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:56:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:31,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:56:31,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:56:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 00:56:31,748 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:56:31,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263408844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:31,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:56:31,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:56:31,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661689335] [2023-11-12 00:56:31,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:31,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:31,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:31,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:31,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:31,751 INFO L87 Difference]: Start difference. First operand 2211 states and 4099 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:56:32,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:32,401 INFO L93 Difference]: Finished difference Result 3328 states and 5766 transitions. [2023-11-12 00:56:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:32,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-11-12 00:56:32,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:32,421 INFO L225 Difference]: With dead ends: 3328 [2023-11-12 00:56:32,440 INFO L226 Difference]: Without dead ends: 2763 [2023-11-12 00:56:32,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 00:56:32,445 INFO L413 NwaCegarLoop]: 3295 mSDtfsCounter, 3470 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3470 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:32,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3470 Valid, 3476 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:56:32,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2023-11-12 00:56:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2755. [2023-11-12 00:56:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2563 states have (on average 1.795942255169723) internal successors, (4603), 2570 states have internal predecessors, (4603), 142 states have call successors, (142), 49 states have call predecessors, (142), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-12 00:56:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4885 transitions. [2023-11-12 00:56:32,563 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4885 transitions. Word has length 110 [2023-11-12 00:56:32,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:32,564 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4885 transitions. [2023-11-12 00:56:32,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:56:32,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4885 transitions. [2023-11-12 00:56:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 00:56:32,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:32,569 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:56:32,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:56:32,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:56:32,777 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:32,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:32,778 INFO L85 PathProgramCache]: Analyzing trace with hash -74068116, now seen corresponding path program 1 times [2023-11-12 00:56:32,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:32,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640464758] [2023-11-12 00:56:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:32,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:56:32,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:32,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640464758] [2023-11-12 00:56:32,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640464758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:56:32,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585064968] [2023-11-12 00:56:32,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:32,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:56:32,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:56:32,933 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:56:32,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:56:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:33,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:56:33,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:56:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 00:56:33,214 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:56:33,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585064968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:33,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:56:33,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:56:33,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069452096] [2023-11-12 00:56:33,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:33,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:33,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:33,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:33,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:33,219 INFO L87 Difference]: Start difference. First operand 2755 states and 4885 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:56:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:33,796 INFO L93 Difference]: Finished difference Result 4948 states and 8142 transitions. [2023-11-12 00:56:33,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:33,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-11-12 00:56:33,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:33,823 INFO L225 Difference]: With dead ends: 4948 [2023-11-12 00:56:33,823 INFO L226 Difference]: Without dead ends: 3839 [2023-11-12 00:56:33,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 00:56:33,830 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 3473 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3426 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:33,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3473 Valid, 3426 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:56:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2023-11-12 00:56:33,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 3827. [2023-11-12 00:56:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3459 states have (on average 1.7019369760046257) internal successors, (5887), 3470 states have internal predecessors, (5887), 270 states have call successors, (270), 97 states have call predecessors, (270), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2023-11-12 00:56:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 6425 transitions. [2023-11-12 00:56:34,005 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 6425 transitions. Word has length 110 [2023-11-12 00:56:34,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:34,006 INFO L495 AbstractCegarLoop]: Abstraction has 3827 states and 6425 transitions. [2023-11-12 00:56:34,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:56:34,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 6425 transitions. [2023-11-12 00:56:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 00:56:34,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:34,016 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:56:34,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:56:34,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:56:34,224 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:34,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:34,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1819015732, now seen corresponding path program 1 times [2023-11-12 00:56:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:34,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089969205] [2023-11-12 00:56:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:34,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:56:34,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:34,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089969205] [2023-11-12 00:56:34,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089969205] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:56:34,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408523388] [2023-11-12 00:56:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:34,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:56:34,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:56:34,392 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:56:34,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:56:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:34,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:56:34,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:56:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-12 00:56:34,677 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:56:34,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408523388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:34,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:56:34,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:56:34,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063347578] [2023-11-12 00:56:34,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:34,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:34,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:34,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:34,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:56:34,679 INFO L87 Difference]: Start difference. First operand 3827 states and 6425 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:56:35,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:35,406 INFO L93 Difference]: Finished difference Result 8140 states and 12794 transitions. [2023-11-12 00:56:35,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:35,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 110 [2023-11-12 00:56:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:35,445 INFO L225 Difference]: With dead ends: 8140 [2023-11-12 00:56:35,445 INFO L226 Difference]: Without dead ends: 5959 [2023-11-12 00:56:35,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 00:56:35,457 INFO L413 NwaCegarLoop]: 3245 mSDtfsCounter, 3458 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3458 SdHoareTripleChecker+Valid, 3426 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:35,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3458 Valid, 3426 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:56:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5959 states. [2023-11-12 00:56:35,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5959 to 5939. [2023-11-12 00:56:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5227 states have (on average 1.6083795676296155) internal successors, (8407), 5246 states have internal predecessors, (8407), 518 states have call successors, (518), 193 states have call predecessors, (518), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2023-11-12 00:56:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 9441 transitions. [2023-11-12 00:56:35,720 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 9441 transitions. Word has length 110 [2023-11-12 00:56:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:35,721 INFO L495 AbstractCegarLoop]: Abstraction has 5939 states and 9441 transitions. [2023-11-12 00:56:35,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:56:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 9441 transitions. [2023-11-12 00:56:35,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-12 00:56:35,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:35,733 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:56:35,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:56:35,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfa6a4c-967b-41a9-9766-c2124018efcd/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:56:35,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:35,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash -377758868, now seen corresponding path program 1 times [2023-11-12 00:56:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:35,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350791216] [2023-11-12 00:56:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:35,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:36,076 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 00:56:36,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:36,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350791216] [2023-11-12 00:56:36,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350791216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:36,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:36,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:36,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297236279] [2023-11-12 00:56:36,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:36,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:36,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:36,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:36,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:36,080 INFO L87 Difference]: Start difference. First operand 5939 states and 9441 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:56:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:36,828 INFO L93 Difference]: Finished difference Result 9351 states and 14484 transitions. [2023-11-12 00:56:36,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:36,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 110 [2023-11-12 00:56:36,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:36,878 INFO L225 Difference]: With dead ends: 9351 [2023-11-12 00:56:36,878 INFO L226 Difference]: Without dead ends: 7139 [2023-11-12 00:56:36,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:36,889 INFO L413 NwaCegarLoop]: 3349 mSDtfsCounter, 99 mSDsluCounter, 3254 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 6603 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:36,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 6603 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:56:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7139 states. [2023-11-12 00:56:37,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7139 to 6803. [2023-11-12 00:56:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6803 states, 6059 states have (on average 1.606700775705562) internal successors, (9735), 6078 states have internal predecessors, (9735), 534 states have call successors, (534), 209 states have call predecessors, (534), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2023-11-12 00:56:37,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6803 states to 6803 states and 10801 transitions. [2023-11-12 00:56:37,209 INFO L78 Accepts]: Start accepts. Automaton has 6803 states and 10801 transitions. Word has length 110 [2023-11-12 00:56:37,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:37,210 INFO L495 AbstractCegarLoop]: Abstraction has 6803 states and 10801 transitions. [2023-11-12 00:56:37,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:56:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 6803 states and 10801 transitions. [2023-11-12 00:56:37,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-12 00:56:37,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:37,231 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:37,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:56:37,232 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:37,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:37,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1940278895, now seen corresponding path program 1 times [2023-11-12 00:56:37,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:37,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058014192] [2023-11-12 00:56:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:37,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 00:56:37,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:37,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058014192] [2023-11-12 00:56:37,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058014192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:37,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:37,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:37,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183213545] [2023-11-12 00:56:37,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:37,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:37,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:37,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:37,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:37,386 INFO L87 Difference]: Start difference. First operand 6803 states and 10801 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:56:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:38,313 INFO L93 Difference]: Finished difference Result 16972 states and 25882 transitions. [2023-11-12 00:56:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-11-12 00:56:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:38,375 INFO L225 Difference]: With dead ends: 16972 [2023-11-12 00:56:38,376 INFO L226 Difference]: Without dead ends: 11815 [2023-11-12 00:56:38,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:38,396 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 3459 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3459 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:38,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3459 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:56:38,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11815 states. [2023-11-12 00:56:38,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11815 to 11763. [2023-11-12 00:56:38,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11763 states, 10315 states have (on average 1.5394086282113426) internal successors, (15879), 10350 states have internal predecessors, (15879), 1030 states have call successors, (1030), 417 states have call predecessors, (1030), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2023-11-12 00:56:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11763 states to 11763 states and 17937 transitions. [2023-11-12 00:56:39,052 INFO L78 Accepts]: Start accepts. Automaton has 11763 states and 17937 transitions. Word has length 149 [2023-11-12 00:56:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:39,054 INFO L495 AbstractCegarLoop]: Abstraction has 11763 states and 17937 transitions. [2023-11-12 00:56:39,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:56:39,055 INFO L276 IsEmpty]: Start isEmpty. Operand 11763 states and 17937 transitions. [2023-11-12 00:56:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-12 00:56:39,093 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:39,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:39,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:56:39,095 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:39,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1160309895, now seen corresponding path program 1 times [2023-11-12 00:56:39,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:39,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357321819] [2023-11-12 00:56:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:39,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:39,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 00:56:39,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:39,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357321819] [2023-11-12 00:56:39,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357321819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:39,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:39,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828077581] [2023-11-12 00:56:39,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:39,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:39,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:39,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:39,262 INFO L87 Difference]: Start difference. First operand 11763 states and 17937 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:56:40,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:40,579 INFO L93 Difference]: Finished difference Result 31708 states and 47290 transitions. [2023-11-12 00:56:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:40,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-11-12 00:56:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:40,673 INFO L225 Difference]: With dead ends: 31708 [2023-11-12 00:56:40,673 INFO L226 Difference]: Without dead ends: 21591 [2023-11-12 00:56:40,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:40,712 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 3461 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:40,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:56:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21591 states. [2023-11-12 00:56:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21591 to 21491. [2023-11-12 00:56:41,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21491 states, 18667 states have (on average 1.4917769325547758) internal successors, (27847), 18734 states have internal predecessors, (27847), 1990 states have call successors, (1990), 833 states have call predecessors, (1990), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2023-11-12 00:56:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21491 states to 21491 states and 31825 transitions. [2023-11-12 00:56:41,874 INFO L78 Accepts]: Start accepts. Automaton has 21491 states and 31825 transitions. Word has length 149 [2023-11-12 00:56:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:41,875 INFO L495 AbstractCegarLoop]: Abstraction has 21491 states and 31825 transitions. [2023-11-12 00:56:41,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:56:41,875 INFO L276 IsEmpty]: Start isEmpty. Operand 21491 states and 31825 transitions. [2023-11-12 00:56:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-12 00:56:41,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:41,941 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:41,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:56:41,941 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:41,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:41,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2108057434, now seen corresponding path program 1 times [2023-11-12 00:56:41,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:41,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917261367] [2023-11-12 00:56:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:41,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 00:56:42,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:42,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917261367] [2023-11-12 00:56:42,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917261367] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:42,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:42,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:42,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320250012] [2023-11-12 00:56:42,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:42,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:42,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:42,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:42,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:42,055 INFO L87 Difference]: Start difference. First operand 21491 states and 31825 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:56:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:43,902 INFO L93 Difference]: Finished difference Result 60604 states and 88922 transitions. [2023-11-12 00:56:43,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:43,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-11-12 00:56:43,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:56:44,069 INFO L225 Difference]: With dead ends: 60604 [2023-11-12 00:56:44,069 INFO L226 Difference]: Without dead ends: 40759 [2023-11-12 00:56:44,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:44,137 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 3463 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:56:44,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:56:44,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40759 states. [2023-11-12 00:56:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40759 to 40563. [2023-11-12 00:56:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40563 states, 35051 states have (on average 1.4591024507146728) internal successors, (51143), 35182 states have internal predecessors, (51143), 3846 states have call successors, (3846), 1665 states have call predecessors, (3846), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2023-11-12 00:56:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40563 states to 40563 states and 58833 transitions. [2023-11-12 00:56:46,275 INFO L78 Accepts]: Start accepts. Automaton has 40563 states and 58833 transitions. Word has length 149 [2023-11-12 00:56:46,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:56:46,276 INFO L495 AbstractCegarLoop]: Abstraction has 40563 states and 58833 transitions. [2023-11-12 00:56:46,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:56:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 40563 states and 58833 transitions. [2023-11-12 00:56:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-12 00:56:46,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:56:46,407 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:56:46,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:56:46,407 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:56:46,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:56:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash 564477736, now seen corresponding path program 1 times [2023-11-12 00:56:46,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:56:46,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290446702] [2023-11-12 00:56:46,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:56:46,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:56:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:56:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-12 00:56:46,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:56:46,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290446702] [2023-11-12 00:56:46,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290446702] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:56:46,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:56:46,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:56:46,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747441974] [2023-11-12 00:56:46,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:56:46,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:56:46,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:56:46,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:56:46,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:56:46,572 INFO L87 Difference]: Start difference. First operand 40563 states and 58833 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:56:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:56:49,911 INFO L93 Difference]: Finished difference Result 117244 states and 169818 transitions. [2023-11-12 00:56:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:56:49,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2023-11-12 00:56:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted.