./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --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 f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:09:01,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:09:01,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:09:01,922 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:09:01,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:09:01,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:09:01,932 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:09:01,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:09:01,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:09:01,945 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:09:01,947 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:09:01,949 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:09:01,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:09:01,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:09:01,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:09:01,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:09:01,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:09:01,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:09:01,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:09:01,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:09:01,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:09:01,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:09:01,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:09:01,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:09:01,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:09:01,995 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:09:01,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:09:01,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:09:01,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:09:02,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:09:02,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:09:02,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:09:02,004 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:09:02,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:09:02,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:09:02,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:09:02,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:09:02,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:09:02,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:09:02,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:09:02,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:09:02,014 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:09:02,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:09:02,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:09:02,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:09:02,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:09:02,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:09:02,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:09:02,071 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:09:02,072 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:09:02,072 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:09:02,072 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:09:02,073 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:09:02,074 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:09:02,074 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:09:02,074 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:09:02,075 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:09:02,075 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:09:02,075 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:09:02,076 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:09:02,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:09:02,077 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:09:02,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:09:02,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:09:02,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:09:02,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:09:02,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:09:02,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:09:02,079 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:09:02,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:09:02,080 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:09:02,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:09:02,081 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:09:02,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:09:02,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:09:02,082 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:09:02,082 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:09:02,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:09:02,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:09:02,083 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:09:02,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:09:02,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:09:02,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:09:02,084 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f89a8ce65f650dd979d04d2db9dc53ba483e2a2b64be3f70ae15b036e4b11b5a [2022-11-22 01:09:02,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:09:02,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:09:02,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:09:02,469 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:09:02,469 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:09:02,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2022-11-22 01:09:06,112 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:09:06,548 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:09:06,548 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c [2022-11-22 01:09:06,585 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/data/4cf3846bb/bdd5772892ff4c19a7d317e5dc3ec8fd/FLAG429ca8ea4 [2022-11-22 01:09:06,605 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/data/4cf3846bb/bdd5772892ff4c19a7d317e5dc3ec8fd [2022-11-22 01:09:06,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:09:06,611 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:09:06,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:09:06,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:09:06,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:09:06,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:09:06" (1/1) ... [2022-11-22 01:09:06,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a49255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:06, skipping insertion in model container [2022-11-22 01:09:06,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:09:06" (1/1) ... [2022-11-22 01:09:06,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:09:06,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:09:06,981 WARN L237 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_db27fcb5-5d89-4d84-be4d-f83734a67991/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2022-11-22 01:09:07,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:09:07,556 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:09:07,579 WARN L237 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_db27fcb5-5d89-4d84-be4d-f83734a67991/sv-benchmarks/c/product-lines/elevator_spec13_product22.cil.c[1811,1824] [2022-11-22 01:09:07,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:09:07,766 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:09:07,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07 WrapperNode [2022-11-22 01:09:07,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:09:07,769 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:09:07,769 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:09:07,769 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:09:07,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07" (1/1) ... [2022-11-22 01:09:07,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07" (1/1) ... [2022-11-22 01:09:07,932 INFO L138 Inliner]: procedures = 92, calls = 344, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 839 [2022-11-22 01:09:07,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:09:07,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:09:07,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:09:07,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:09:07,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07" (1/1) ... [2022-11-22 01:09:07,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07" (1/1) ... [2022-11-22 01:09:07,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07" (1/1) ... [2022-11-22 01:09:07,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07" (1/1) ... [2022-11-22 01:09:08,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07" (1/1) ... [2022-11-22 01:09:08,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07" (1/1) ... [2022-11-22 01:09:08,060 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07" (1/1) ... [2022-11-22 01:09:08,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07" (1/1) ... [2022-11-22 01:09:08,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:09:08,081 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:09:08,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:09:08,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:09:08,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07" (1/1) ... [2022-11-22 01:09:08,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:09:08,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:08,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:09:08,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:09:08,202 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2022-11-22 01:09:08,202 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2022-11-22 01:09:08,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:09:08,203 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-11-22 01:09:08,203 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-11-22 01:09:08,203 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-22 01:09:08,203 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-22 01:09:08,204 INFO L130 BoogieDeclarations]: Found specification of procedure existInLiftCallsInDirection [2022-11-22 01:09:08,204 INFO L138 BoogieDeclarations]: Found implementation of procedure existInLiftCallsInDirection [2022-11-22 01:09:08,204 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-22 01:09:08,204 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-22 01:09:08,205 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-22 01:09:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-22 01:09:08,205 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-22 01:09:08,205 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-22 01:09:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-22 01:09:08,206 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-22 01:09:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-22 01:09:08,206 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-22 01:09:08,206 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-22 01:09:08,207 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-22 01:09:08,207 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-22 01:09:08,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-22 01:09:08,209 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-22 01:09:08,209 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-22 01:09:08,210 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-22 01:09:08,210 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-22 01:09:08,211 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-22 01:09:08,211 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-22 01:09:08,211 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-22 01:09:08,211 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-22 01:09:08,212 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-22 01:09:08,212 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-22 01:09:08,212 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-22 01:09:08,213 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-22 01:09:08,213 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-22 01:09:08,213 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-22 01:09:08,213 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-22 01:09:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-22 01:09:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:09:08,214 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-22 01:09:08,214 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-22 01:09:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-22 01:09:08,215 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-22 01:09:08,215 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-22 01:09:08,216 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-22 01:09:08,216 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-22 01:09:08,217 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-22 01:09:08,217 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-11-22 01:09:08,218 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-11-22 01:09:08,218 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-11-22 01:09:08,219 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-11-22 01:09:08,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:09:08,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:09:08,220 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-22 01:09:08,220 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-22 01:09:08,409 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:09:08,412 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:09:10,267 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:09:11,349 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:09:11,350 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-22 01:09:11,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:09:11 BoogieIcfgContainer [2022-11-22 01:09:11,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:09:11,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:09:11,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:09:11,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:09:11,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:09:06" (1/3) ... [2022-11-22 01:09:11,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d91ccaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:09:11, skipping insertion in model container [2022-11-22 01:09:11,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:07" (2/3) ... [2022-11-22 01:09:11,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d91ccaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:09:11, skipping insertion in model container [2022-11-22 01:09:11,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:09:11" (3/3) ... [2022-11-22 01:09:11,377 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec13_product22.cil.c [2022-11-22 01:09:11,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:09:11,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:09:11,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:09:11,535 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=LoopsAndPotentialCycles, 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;@737955ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:09:11,536 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:09:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-11-22 01:09:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-22 01:09:11,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:11,595 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:11,595 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:11,602 INFO L85 PathProgramCache]: Analyzing trace with hash 113876529, now seen corresponding path program 1 times [2022-11-22 01:09:11,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:11,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173237153] [2022-11-22 01:09:11,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:11,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-22 01:09:13,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:13,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173237153] [2022-11-22 01:09:13,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173237153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:13,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:13,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:09:13,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339962169] [2022-11-22 01:09:13,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:13,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:09:13,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:13,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:09:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:09:13,175 INFO L87 Difference]: Start difference. First operand has 416 states, 286 states have (on average 1.597902097902098) internal successors, (457), 306 states have internal predecessors, (457), 102 states have call successors, (102), 26 states have call predecessors, (102), 26 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-22 01:09:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:17,712 INFO L93 Difference]: Finished difference Result 1726 states and 2836 transitions. [2022-11-22 01:09:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:09:17,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 70 [2022-11-22 01:09:17,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:17,761 INFO L225 Difference]: With dead ends: 1726 [2022-11-22 01:09:17,764 INFO L226 Difference]: Without dead ends: 1311 [2022-11-22 01:09:17,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:09:17,787 INFO L413 NwaCegarLoop]: 931 mSDtfsCounter, 1576 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:17,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1649 Valid, 1618 Invalid, 2673 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [338 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-22 01:09:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-11-22 01:09:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1198. [2022-11-22 01:09:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 868 states have (on average 1.596774193548387) internal successors, (1386), 903 states have internal predecessors, (1386), 268 states have call successors, (268), 62 states have call predecessors, (268), 61 states have return successors, (286), 247 states have call predecessors, (286), 264 states have call successors, (286) [2022-11-22 01:09:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1940 transitions. [2022-11-22 01:09:18,117 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1940 transitions. Word has length 70 [2022-11-22 01:09:18,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:18,124 INFO L495 AbstractCegarLoop]: Abstraction has 1198 states and 1940 transitions. [2022-11-22 01:09:18,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-22 01:09:18,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1940 transitions. [2022-11-22 01:09:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-22 01:09:18,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:18,138 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:18,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:09:18,140 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:18,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1067359487, now seen corresponding path program 1 times [2022-11-22 01:09:18,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:18,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533892749] [2022-11-22 01:09:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:18,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-22 01:09:19,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:19,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533892749] [2022-11-22 01:09:19,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533892749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:19,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:19,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:09:19,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113709505] [2022-11-22 01:09:19,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:19,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:09:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:09:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:19,062 INFO L87 Difference]: Start difference. First operand 1198 states and 1940 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 5 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-22 01:09:23,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:23,771 INFO L93 Difference]: Finished difference Result 4078 states and 6678 transitions. [2022-11-22 01:09:23,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 01:09:23,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 5 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 128 [2022-11-22 01:09:23,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:23,808 INFO L225 Difference]: With dead ends: 4078 [2022-11-22 01:09:23,808 INFO L226 Difference]: Without dead ends: 2895 [2022-11-22 01:09:23,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:09:23,832 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 1284 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 4461 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 4937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 4461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:23,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1366 Valid, 1845 Invalid, 4937 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [476 Valid, 4461 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-22 01:09:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2022-11-22 01:09:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2856. [2022-11-22 01:09:24,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2080 states have (on average 1.5576923076923077) internal successors, (3240), 2135 states have internal predecessors, (3240), 645 states have call successors, (645), 121 states have call predecessors, (645), 130 states have return successors, (771), 621 states have call predecessors, (771), 639 states have call successors, (771) [2022-11-22 01:09:24,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 4656 transitions. [2022-11-22 01:09:24,163 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 4656 transitions. Word has length 128 [2022-11-22 01:09:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:24,166 INFO L495 AbstractCegarLoop]: Abstraction has 2856 states and 4656 transitions. [2022-11-22 01:09:24,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 5 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2022-11-22 01:09:24,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 4656 transitions. [2022-11-22 01:09:24,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-22 01:09:24,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:24,180 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:24,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:09:24,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:24,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1760886813, now seen corresponding path program 1 times [2022-11-22 01:09:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:24,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877364621] [2022-11-22 01:09:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:24,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 01:09:24,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:24,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877364621] [2022-11-22 01:09:24,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877364621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:24,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990225512] [2022-11-22 01:09:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:24,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:24,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:24,918 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:24,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:09:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:25,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:09:25,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:09:25,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:09:25,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990225512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:25,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:09:25,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 9 [2022-11-22 01:09:25,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720674552] [2022-11-22 01:09:25,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:25,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:09:25,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:25,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:09:25,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:09:25,826 INFO L87 Difference]: Start difference. First operand 2856 states and 4656 transitions. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 5 states have call successors, (23), 4 states have call predecessors, (23), 6 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-22 01:09:31,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:31,488 INFO L93 Difference]: Finished difference Result 8633 states and 14153 transitions. [2022-11-22 01:09:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 01:09:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 5 states have call successors, (23), 4 states have call predecessors, (23), 6 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 130 [2022-11-22 01:09:31,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:31,535 INFO L225 Difference]: With dead ends: 8633 [2022-11-22 01:09:31,535 INFO L226 Difference]: Without dead ends: 5794 [2022-11-22 01:09:31,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:09:31,558 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 1831 mSDsluCounter, 2063 mSDsCounter, 0 mSdLazyCounter, 5013 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 2457 SdHoareTripleChecker+Invalid, 5629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 5013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:31,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1915 Valid, 2457 Invalid, 5629 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [616 Valid, 5013 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-22 01:09:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5794 states. [2022-11-22 01:09:31,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5794 to 4861. [2022-11-22 01:09:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4861 states, 3583 states have (on average 1.5796818308679876) internal successors, (5660), 3659 states have internal predecessors, (5660), 1026 states have call successors, (1026), 217 states have call predecessors, (1026), 251 states have return successors, (1247), 1017 states have call predecessors, (1247), 1018 states have call successors, (1247) [2022-11-22 01:09:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4861 states to 4861 states and 7933 transitions. [2022-11-22 01:09:32,084 INFO L78 Accepts]: Start accepts. Automaton has 4861 states and 7933 transitions. Word has length 130 [2022-11-22 01:09:32,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:32,085 INFO L495 AbstractCegarLoop]: Abstraction has 4861 states and 7933 transitions. [2022-11-22 01:09:32,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 5 states have call successors, (23), 4 states have call predecessors, (23), 6 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-22 01:09:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 4861 states and 7933 transitions. [2022-11-22 01:09:32,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-22 01:09:32,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:32,091 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:32,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:32,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:32,309 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1627514483, now seen corresponding path program 1 times [2022-11-22 01:09:32,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:32,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926629450] [2022-11-22 01:09:32,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:32,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:09:32,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:32,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926629450] [2022-11-22 01:09:32,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926629450] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:32,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:32,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:09:32,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047006347] [2022-11-22 01:09:32,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:32,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:09:32,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:32,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:09:32,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:32,796 INFO L87 Difference]: Start difference. First operand 4861 states and 7933 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 01:09:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:33,463 INFO L93 Difference]: Finished difference Result 8684 states and 14242 transitions. [2022-11-22 01:09:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:09:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2022-11-22 01:09:33,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:33,514 INFO L225 Difference]: With dead ends: 8684 [2022-11-22 01:09:33,514 INFO L226 Difference]: Without dead ends: 5029 [2022-11-22 01:09:33,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:33,555 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:33,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3644 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:09:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2022-11-22 01:09:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 4966. [2022-11-22 01:09:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4966 states, 3658 states have (on average 1.5677966101694916) internal successors, (5735), 3734 states have internal predecessors, (5735), 1026 states have call successors, (1026), 217 states have call predecessors, (1026), 281 states have return successors, (1322), 1047 states have call predecessors, (1322), 1018 states have call successors, (1322) [2022-11-22 01:09:34,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4966 states to 4966 states and 8083 transitions. [2022-11-22 01:09:34,125 INFO L78 Accepts]: Start accepts. Automaton has 4966 states and 8083 transitions. Word has length 93 [2022-11-22 01:09:34,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:34,127 INFO L495 AbstractCegarLoop]: Abstraction has 4966 states and 8083 transitions. [2022-11-22 01:09:34,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 01:09:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 4966 states and 8083 transitions. [2022-11-22 01:09:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-22 01:09:34,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:34,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:34,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:09:34,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:34,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1804285504, now seen corresponding path program 1 times [2022-11-22 01:09:34,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:34,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050471256] [2022-11-22 01:09:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:09:34,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:34,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050471256] [2022-11-22 01:09:34,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050471256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:34,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:34,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:09:34,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497168744] [2022-11-22 01:09:34,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:34,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:09:34,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:34,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:09:34,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:34,583 INFO L87 Difference]: Start difference. First operand 4966 states and 8083 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 01:09:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:35,255 INFO L93 Difference]: Finished difference Result 8843 states and 14452 transitions. [2022-11-22 01:09:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:09:35,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2022-11-22 01:09:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:35,298 INFO L225 Difference]: With dead ends: 8843 [2022-11-22 01:09:35,298 INFO L226 Difference]: Without dead ends: 5104 [2022-11-22 01:09:35,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:35,330 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 7 mSDsluCounter, 3010 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3620 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:35,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3620 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:09:35,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5104 states. [2022-11-22 01:09:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5104 to 4981. [2022-11-22 01:09:35,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4981 states, 3673 states have (on average 1.5654778110536347) internal successors, (5750), 3734 states have internal predecessors, (5750), 1026 states have call successors, (1026), 217 states have call predecessors, (1026), 281 states have return successors, (1322), 1062 states have call predecessors, (1322), 1018 states have call successors, (1322) [2022-11-22 01:09:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4981 states to 4981 states and 8098 transitions. [2022-11-22 01:09:35,806 INFO L78 Accepts]: Start accepts. Automaton has 4981 states and 8098 transitions. Word has length 92 [2022-11-22 01:09:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:35,807 INFO L495 AbstractCegarLoop]: Abstraction has 4981 states and 8098 transitions. [2022-11-22 01:09:35,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 01:09:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4981 states and 8098 transitions. [2022-11-22 01:09:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-22 01:09:35,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:35,813 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:35,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:09:35,814 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:35,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1804396461, now seen corresponding path program 1 times [2022-11-22 01:09:35,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:35,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110984947] [2022-11-22 01:09:35,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:35,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:09:36,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:36,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110984947] [2022-11-22 01:09:36,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110984947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:36,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:36,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:09:36,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985873589] [2022-11-22 01:09:36,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:36,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:09:36,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:36,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:09:36,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:36,207 INFO L87 Difference]: Start difference. First operand 4981 states and 8098 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 01:09:36,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:36,821 INFO L93 Difference]: Finished difference Result 8870 states and 14479 transitions. [2022-11-22 01:09:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:09:36,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 93 [2022-11-22 01:09:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:36,879 INFO L225 Difference]: With dead ends: 8870 [2022-11-22 01:09:36,880 INFO L226 Difference]: Without dead ends: 5119 [2022-11-22 01:09:36,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:36,913 INFO L413 NwaCegarLoop]: 615 mSDtfsCounter, 6 mSDsluCounter, 3029 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:36,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3644 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:09:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5119 states. [2022-11-22 01:09:37,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5119 to 4996. [2022-11-22 01:09:37,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4996 states, 3688 states have (on average 1.563177874186551) internal successors, (5765), 3734 states have internal predecessors, (5765), 1026 states have call successors, (1026), 217 states have call predecessors, (1026), 281 states have return successors, (1322), 1077 states have call predecessors, (1322), 1018 states have call successors, (1322) [2022-11-22 01:09:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4996 states to 4996 states and 8113 transitions. [2022-11-22 01:09:37,453 INFO L78 Accepts]: Start accepts. Automaton has 4996 states and 8113 transitions. Word has length 93 [2022-11-22 01:09:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:37,456 INFO L495 AbstractCegarLoop]: Abstraction has 4996 states and 8113 transitions. [2022-11-22 01:09:37,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-22 01:09:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4996 states and 8113 transitions. [2022-11-22 01:09:37,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-22 01:09:37,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:37,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:37,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 01:09:37,462 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:37,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:37,463 INFO L85 PathProgramCache]: Analyzing trace with hash 84131573, now seen corresponding path program 1 times [2022-11-22 01:09:37,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:37,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329918210] [2022-11-22 01:09:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:37,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:37,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:09:37,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:37,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329918210] [2022-11-22 01:09:37,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329918210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:37,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:37,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:09:37,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585516983] [2022-11-22 01:09:37,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:37,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:09:37,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:37,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:09:37,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:37,915 INFO L87 Difference]: Start difference. First operand 4996 states and 8113 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 01:09:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:42,664 INFO L93 Difference]: Finished difference Result 13891 states and 23147 transitions. [2022-11-22 01:09:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:09:42,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 97 [2022-11-22 01:09:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:42,759 INFO L225 Difference]: With dead ends: 13891 [2022-11-22 01:09:42,759 INFO L226 Difference]: Without dead ends: 9765 [2022-11-22 01:09:42,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:09:42,793 INFO L413 NwaCegarLoop]: 963 mSDtfsCounter, 1497 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 3248 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1683 SdHoareTripleChecker+Valid, 2508 SdHoareTripleChecker+Invalid, 3482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 3248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:42,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1683 Valid, 2508 Invalid, 3482 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [234 Valid, 3248 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-22 01:09:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9765 states. [2022-11-22 01:09:43,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9765 to 8127. [2022-11-22 01:09:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8127 states, 5909 states have (on average 1.5239465222541886) internal successors, (9005), 6008 states have internal predecessors, (9005), 1729 states have call successors, (1729), 390 states have call predecessors, (1729), 488 states have return successors, (2300), 1783 states have call predecessors, (2300), 1717 states have call successors, (2300) [2022-11-22 01:09:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8127 states to 8127 states and 13034 transitions. [2022-11-22 01:09:43,758 INFO L78 Accepts]: Start accepts. Automaton has 8127 states and 13034 transitions. Word has length 97 [2022-11-22 01:09:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:43,759 INFO L495 AbstractCegarLoop]: Abstraction has 8127 states and 13034 transitions. [2022-11-22 01:09:43,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 01:09:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 8127 states and 13034 transitions. [2022-11-22 01:09:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-22 01:09:43,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:43,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:43,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:09:43,766 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1048120185, now seen corresponding path program 1 times [2022-11-22 01:09:43,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:43,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418807264] [2022-11-22 01:09:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:43,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:44,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:09:44,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:44,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418807264] [2022-11-22 01:09:44,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418807264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:44,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:44,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:09:44,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849951826] [2022-11-22 01:09:44,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:44,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:09:44,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:44,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:09:44,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:09:44,105 INFO L87 Difference]: Start difference. First operand 8127 states and 13034 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 01:09:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:51,001 INFO L93 Difference]: Finished difference Result 31582 states and 56767 transitions. [2022-11-22 01:09:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:09:51,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2022-11-22 01:09:51,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:51,180 INFO L225 Difference]: With dead ends: 31582 [2022-11-22 01:09:51,180 INFO L226 Difference]: Without dead ends: 23470 [2022-11-22 01:09:51,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:09:51,290 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 2497 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 3588 mSolverCounterSat, 1110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2597 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 4698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1110 IncrementalHoareTripleChecker+Valid, 3588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:51,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2597 Valid, 1623 Invalid, 4698 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1110 Valid, 3588 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-22 01:09:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23470 states. [2022-11-22 01:09:53,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23470 to 19767. [2022-11-22 01:09:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19767 states, 14400 states have (on average 1.505) internal successors, (21672), 14591 states have internal predecessors, (21672), 4168 states have call successors, (4168), 896 states have call predecessors, (4168), 1198 states have return successors, (7267), 4414 states have call predecessors, (7267), 4146 states have call successors, (7267) [2022-11-22 01:09:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19767 states to 19767 states and 33107 transitions. [2022-11-22 01:09:54,086 INFO L78 Accepts]: Start accepts. Automaton has 19767 states and 33107 transitions. Word has length 100 [2022-11-22 01:09:54,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:54,087 INFO L495 AbstractCegarLoop]: Abstraction has 19767 states and 33107 transitions. [2022-11-22 01:09:54,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-11-22 01:09:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand 19767 states and 33107 transitions. [2022-11-22 01:09:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-22 01:09:54,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:54,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:54,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:09:54,099 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:09:54,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash 575359487, now seen corresponding path program 1 times [2022-11-22 01:09:54,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:54,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744232517] [2022-11-22 01:09:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:54,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:09:54,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:54,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744232517] [2022-11-22 01:09:54,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744232517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:54,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:54,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-22 01:09:54,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219281295] [2022-11-22 01:09:54,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:54,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:09:54,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:54,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:09:54,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:09:54,618 INFO L87 Difference]: Start difference. First operand 19767 states and 33107 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 01:10:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:00,027 INFO L93 Difference]: Finished difference Result 41426 states and 71861 transitions. [2022-11-22 01:10:00,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 01:10:00,028 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 102 [2022-11-22 01:10:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:00,249 INFO L225 Difference]: With dead ends: 41426 [2022-11-22 01:10:00,250 INFO L226 Difference]: Without dead ends: 24439 [2022-11-22 01:10:00,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:10:00,439 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 1114 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 3248 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 3677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 3248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:00,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 1543 Invalid, 3677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 3248 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-22 01:10:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24439 states. [2022-11-22 01:10:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24439 to 20082. [2022-11-22 01:10:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20082 states, 14610 states have (on average 1.501095140314853) internal successors, (21931), 14850 states have internal predecessors, (21931), 4175 states have call successors, (4175), 952 states have call predecessors, (4175), 1296 states have return successors, (7400), 4414 states have call predecessors, (7400), 4153 states have call successors, (7400) [2022-11-22 01:10:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20082 states to 20082 states and 33506 transitions. [2022-11-22 01:10:03,044 INFO L78 Accepts]: Start accepts. Automaton has 20082 states and 33506 transitions. Word has length 102 [2022-11-22 01:10:03,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:03,045 INFO L495 AbstractCegarLoop]: Abstraction has 20082 states and 33506 transitions. [2022-11-22 01:10:03,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 4 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-22 01:10:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 20082 states and 33506 transitions. [2022-11-22 01:10:03,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-22 01:10:03,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:03,051 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:10:03,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:10:03,051 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:10:03,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:03,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1795363564, now seen corresponding path program 1 times [2022-11-22 01:10:03,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:03,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541629635] [2022-11-22 01:10:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:03,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 01:10:03,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:03,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541629635] [2022-11-22 01:10:03,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541629635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:10:03,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:10:03,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:10:03,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148885326] [2022-11-22 01:10:03,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:10:03,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:10:03,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:03,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:10:03,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:10:03,256 INFO L87 Difference]: Start difference. First operand 20082 states and 33506 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-22 01:10:06,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:06,500 INFO L93 Difference]: Finished difference Result 39820 states and 68559 transitions. [2022-11-22 01:10:06,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:10:06,501 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 106 [2022-11-22 01:10:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:06,678 INFO L225 Difference]: With dead ends: 39820 [2022-11-22 01:10:06,678 INFO L226 Difference]: Without dead ends: 21972 [2022-11-22 01:10:06,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:10:06,881 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 216 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1660 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:06,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 1660 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:10:06,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21972 states. [2022-11-22 01:10:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21972 to 21972. [2022-11-22 01:10:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21972 states, 16423 states have (on average 1.5142787554040065) internal successors, (24869), 16740 states have internal predecessors, (24869), 4175 states have call successors, (4175), 952 states have call predecessors, (4175), 1373 states have return successors, (7730), 4414 states have call predecessors, (7730), 4153 states have call successors, (7730) [2022-11-22 01:10:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21972 states to 21972 states and 36774 transitions. [2022-11-22 01:10:09,723 INFO L78 Accepts]: Start accepts. Automaton has 21972 states and 36774 transitions. Word has length 106 [2022-11-22 01:10:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:09,724 INFO L495 AbstractCegarLoop]: Abstraction has 21972 states and 36774 transitions. [2022-11-22 01:10:09,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-22 01:10:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 21972 states and 36774 transitions. [2022-11-22 01:10:09,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-22 01:10:09,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:09,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:10:09,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:10:09,730 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:10:09,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:09,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1263265834, now seen corresponding path program 1 times [2022-11-22 01:10:09,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:09,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546356062] [2022-11-22 01:10:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:09,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:10:09,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:09,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546356062] [2022-11-22 01:10:09,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546356062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:09,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755197990] [2022-11-22 01:10:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:09,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:09,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:09,934 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:09,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:10:10,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:10,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:10:10,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:10:10,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:10:10,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755197990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:10:10,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:10:10,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2022-11-22 01:10:10,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788066548] [2022-11-22 01:10:10,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:10:10,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:10:10,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:10,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:10:10,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:10:10,441 INFO L87 Difference]: Start difference. First operand 21972 states and 36774 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 01:10:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:13,495 INFO L93 Difference]: Finished difference Result 44223 states and 76761 transitions. [2022-11-22 01:10:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:10:13,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 106 [2022-11-22 01:10:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:13,676 INFO L225 Difference]: With dead ends: 44223 [2022-11-22 01:10:13,677 INFO L226 Difference]: Without dead ends: 22266 [2022-11-22 01:10:14,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:10:14,126 INFO L413 NwaCegarLoop]: 602 mSDtfsCounter, 85 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:14,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1719 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:10:14,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22266 states. [2022-11-22 01:10:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22266 to 22266. [2022-11-22 01:10:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22266 states, 16668 states have (on average 1.509659227261819) internal successors, (25163), 16985 states have internal predecessors, (25163), 4175 states have call successors, (4175), 1001 states have call predecessors, (4175), 1422 states have return successors, (7730), 4414 states have call predecessors, (7730), 4153 states have call successors, (7730) [2022-11-22 01:10:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22266 states to 22266 states and 37068 transitions. [2022-11-22 01:10:16,944 INFO L78 Accepts]: Start accepts. Automaton has 22266 states and 37068 transitions. Word has length 106 [2022-11-22 01:10:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:16,945 INFO L495 AbstractCegarLoop]: Abstraction has 22266 states and 37068 transitions. [2022-11-22 01:10:16,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 01:10:16,945 INFO L276 IsEmpty]: Start isEmpty. Operand 22266 states and 37068 transitions. [2022-11-22 01:10:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-22 01:10:16,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:16,951 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:10:16,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:10:17,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 01:10:17,161 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:10:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash -979481268, now seen corresponding path program 1 times [2022-11-22 01:10:17,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:17,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195266642] [2022-11-22 01:10:17,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:17,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:10:17,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:17,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195266642] [2022-11-22 01:10:17,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195266642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:17,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346294172] [2022-11-22 01:10:17,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:17,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:17,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:17,423 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:17,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:10:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:17,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:10:17,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 01:10:17,927 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:10:17,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346294172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:10:17,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:10:17,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-22 01:10:17,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494141697] [2022-11-22 01:10:17,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:10:17,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:10:17,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:10:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:10:17,931 INFO L87 Difference]: Start difference. First operand 22266 states and 37068 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 01:10:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:19,912 INFO L93 Difference]: Finished difference Result 44664 states and 76452 transitions. [2022-11-22 01:10:19,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:10:19,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 107 [2022-11-22 01:10:19,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:20,224 INFO L225 Difference]: With dead ends: 44664 [2022-11-22 01:10:20,225 INFO L226 Difference]: Without dead ends: 22217 [2022-11-22 01:10:20,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:10:20,531 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 91 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:20,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1715 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:10:20,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22217 states. [2022-11-22 01:10:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22217 to 22217. [2022-11-22 01:10:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22217 states, 16619 states have (on average 1.5023166255490703) internal successors, (24967), 16936 states have internal predecessors, (24967), 4175 states have call successors, (4175), 1001 states have call predecessors, (4175), 1422 states have return successors, (7730), 4414 states have call predecessors, (7730), 4153 states have call successors, (7730) [2022-11-22 01:10:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22217 states to 22217 states and 36872 transitions. [2022-11-22 01:10:22,942 INFO L78 Accepts]: Start accepts. Automaton has 22217 states and 36872 transitions. Word has length 107 [2022-11-22 01:10:22,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:22,943 INFO L495 AbstractCegarLoop]: Abstraction has 22217 states and 36872 transitions. [2022-11-22 01:10:22,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-22 01:10:22,944 INFO L276 IsEmpty]: Start isEmpty. Operand 22217 states and 36872 transitions. [2022-11-22 01:10:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 01:10:22,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:22,950 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:10:22,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:10:23,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:23,160 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:10:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1059970253, now seen corresponding path program 1 times [2022-11-22 01:10:23,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:23,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863982117] [2022-11-22 01:10:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:23,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:10:23,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:23,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863982117] [2022-11-22 01:10:23,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863982117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:23,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886810522] [2022-11-22 01:10:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:23,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:23,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:23,417 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:23,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:10:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:23,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:10:23,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:10:23,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:10:23,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886810522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:10:23,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:10:23,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2022-11-22 01:10:23,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469221255] [2022-11-22 01:10:23,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:10:23,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:10:23,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:23,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:10:23,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:10:23,929 INFO L87 Difference]: Start difference. First operand 22217 states and 36872 transitions. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-22 01:10:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:28,200 INFO L93 Difference]: Finished difference Result 59145 states and 108298 transitions. [2022-11-22 01:10:28,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:10:28,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 109 [2022-11-22 01:10:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:28,403 INFO L225 Difference]: With dead ends: 59145 [2022-11-22 01:10:28,404 INFO L226 Difference]: Without dead ends: 36943 [2022-11-22 01:10:28,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:10:28,587 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 629 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 2072 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:28,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 2072 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:10:28,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36943 states. [2022-11-22 01:10:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36943 to 36315. [2022-11-22 01:10:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36315 states, 27029 states have (on average 1.4575086018720633) internal successors, (39395), 27529 states have internal predecessors, (39395), 6996 states have call successors, (6996), 1603 states have call predecessors, (6996), 2289 states have return successors, (16838), 7425 states have call predecessors, (16838), 6958 states have call successors, (16838) [2022-11-22 01:10:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36315 states to 36315 states and 63229 transitions. [2022-11-22 01:10:32,452 INFO L78 Accepts]: Start accepts. Automaton has 36315 states and 63229 transitions. Word has length 109 [2022-11-22 01:10:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:32,453 INFO L495 AbstractCegarLoop]: Abstraction has 36315 states and 63229 transitions. [2022-11-22 01:10:32,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-22 01:10:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 36315 states and 63229 transitions. [2022-11-22 01:10:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-22 01:10:32,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:32,461 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:10:32,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:10:32,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 01:10:32,670 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:10:32,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:32,671 INFO L85 PathProgramCache]: Analyzing trace with hash 41505125, now seen corresponding path program 1 times [2022-11-22 01:10:32,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:32,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986973268] [2022-11-22 01:10:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:32,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:10:33,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:33,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986973268] [2022-11-22 01:10:33,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986973268] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:33,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677709592] [2022-11-22 01:10:33,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:33,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:33,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:33,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:33,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db27fcb5-5d89-4d84-be4d-f83734a67991/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:10:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:10:33,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:10:33,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:10:33,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677709592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:10:33,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:10:33,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-22 01:10:33,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24598845] [2022-11-22 01:10:33,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:10:33,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:10:33,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:33,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:10:33,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:10:33,613 INFO L87 Difference]: Start difference. First operand 36315 states and 63229 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2022-11-22 01:10:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:38,734 INFO L93 Difference]: Finished difference Result 80999 states and 154352 transitions. [2022-11-22 01:10:38,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 01:10:38,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 109 [2022-11-22 01:10:38,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:39,106 INFO L225 Difference]: With dead ends: 80999 [2022-11-22 01:10:39,106 INFO L226 Difference]: Without dead ends: 44699 [2022-11-22 01:10:39,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:10:39,462 INFO L413 NwaCegarLoop]: 881 mSDtfsCounter, 699 mSDsluCounter, 2819 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 3700 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:39,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 3700 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:10:39,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44699 states. [2022-11-22 01:10:44,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44699 to 44476. [2022-11-22 01:10:44,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44476 states, 33204 states have (on average 1.4349174798217081) internal successors, (47645), 33957 states have internal predecessors, (47645), 8184 states have call successors, (8184), 2164 states have call predecessors, (8184), 3087 states have return successors, (34163), 8597 states have call predecessors, (34163), 8120 states have call successors, (34163)