./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P --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 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:21:25,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:21:25,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:21:25,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:21:25,928 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:21:25,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:21:25,931 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:21:25,933 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:21:25,935 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:21:25,936 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:21:25,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:21:25,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:21:25,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:21:25,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:21:25,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:21:25,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:21:25,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:21:25,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:21:25,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:21:25,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:21:25,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:21:25,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:21:25,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:21:25,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:21:25,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:21:25,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:21:25,971 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:21:25,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:21:25,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:21:25,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:21:25,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:21:25,976 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:21:25,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:21:25,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:21:25,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:21:25,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:21:25,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:21:25,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:21:25,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:21:25,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:21:25,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:21:25,984 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:21:26,016 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:21:26,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:21:26,017 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:21:26,017 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:21:26,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:21:26,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:21:26,019 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:21:26,019 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:21:26,020 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:21:26,020 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:21:26,020 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:21:26,021 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:21:26,021 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:21:26,021 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:21:26,022 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:21:26,022 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:21:26,023 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:21:26,023 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:21:26,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:21:26,024 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:21:26,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:21:26,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:21:26,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:21:26,026 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:21:26,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:21:26,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:21:26,027 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:21:26,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:21:26,027 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:21:26,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:21:26,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:21:26,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:21:26,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:21:26,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:21:26,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:21:26,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:21:26,030 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:21:26,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:21:26,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:21:26,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:21:26,032 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:21:26,032 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62c2cf132c1af8470eae7f9b6621445fd5b91c1643db1f71bf7213022a4dec0a [2021-11-21 00:21:26,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:21:26,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:21:26,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:21:26,293 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:21:26,298 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:21:26,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2021-11-21 00:21:26,397 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/data/09fbd0d8a/ea850211d39d4ff886bf4b01bb8bddcd/FLAG09018928b [2021-11-21 00:21:26,912 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:21:26,912 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c [2021-11-21 00:21:26,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/data/09fbd0d8a/ea850211d39d4ff886bf4b01bb8bddcd/FLAG09018928b [2021-11-21 00:21:27,224 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/data/09fbd0d8a/ea850211d39d4ff886bf4b01bb8bddcd [2021-11-21 00:21:27,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:21:27,228 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:21:27,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:21:27,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:21:27,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:21:27,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:21:27" (1/1) ... [2021-11-21 00:21:27,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f1bd601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27, skipping insertion in model container [2021-11-21 00:21:27,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:21:27" (1/1) ... [2021-11-21 00:21:27,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:21:27,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:21:27,532 WARN L230 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_730d88c0-7337-4f74-8278-653bfa50e255/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2021-11-21 00:21:27,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:21:27,662 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:21:27,726 WARN L230 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_730d88c0-7337-4f74-8278-653bfa50e255/sv-benchmarks/c/product-lines/minepump_spec5_productSimulator.cil.c[5724,5737] [2021-11-21 00:21:27,813 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:21:27,839 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:21:27,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27 WrapperNode [2021-11-21 00:21:27,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:21:27,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:21:27,841 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:21:27,841 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:21:27,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27" (1/1) ... [2021-11-21 00:21:27,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27" (1/1) ... [2021-11-21 00:21:27,905 INFO L137 Inliner]: procedures = 65, calls = 180, calls flagged for inlining = 30, calls inlined = 27, statements flattened = 356 [2021-11-21 00:21:27,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:21:27,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:21:27,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:21:27,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:21:27,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27" (1/1) ... [2021-11-21 00:21:27,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27" (1/1) ... [2021-11-21 00:21:27,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27" (1/1) ... [2021-11-21 00:21:27,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27" (1/1) ... [2021-11-21 00:21:27,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27" (1/1) ... [2021-11-21 00:21:27,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27" (1/1) ... [2021-11-21 00:21:27,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27" (1/1) ... [2021-11-21 00:21:27,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:21:27,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:21:27,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:21:27,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:21:27,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27" (1/1) ... [2021-11-21 00:21:27,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:21:27,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:21:28,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:21:28,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:21:28,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:21:28,060 INFO L130 BoogieDeclarations]: Found specification of procedure activatePump__before__methaneQuery [2021-11-21 00:21:28,060 INFO L138 BoogieDeclarations]: Found implementation of procedure activatePump__before__methaneQuery [2021-11-21 00:21:28,060 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-21 00:21:28,060 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-21 00:21:28,060 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-21 00:21:28,061 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-21 00:21:28,061 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__highWaterSensor [2021-11-21 00:21:28,061 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__highWaterSensor [2021-11-21 00:21:28,061 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2021-11-21 00:21:28,061 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2021-11-21 00:21:28,061 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__methaneAlarm [2021-11-21 00:21:28,062 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__methaneAlarm [2021-11-21 00:21:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2021-11-21 00:21:28,062 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2021-11-21 00:21:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__before__lowWaterSensor [2021-11-21 00:21:28,062 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__before__lowWaterSensor [2021-11-21 00:21:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneAlarm [2021-11-21 00:21:28,063 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneAlarm [2021-11-21 00:21:28,063 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2021-11-21 00:21:28,063 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2021-11-21 00:21:28,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:21:28,063 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2021-11-21 00:21:28,063 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2021-11-21 00:21:28,064 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2021-11-21 00:21:28,064 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2021-11-21 00:21:28,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:21:28,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:21:28,197 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:21:28,203 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:21:28,546 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:21:28,716 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:21:28,716 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 00:21:28,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:21:28 BoogieIcfgContainer [2021-11-21 00:21:28,719 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:21:28,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:21:28,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:21:28,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:21:28,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:21:27" (1/3) ... [2021-11-21 00:21:28,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6ce52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:21:28, skipping insertion in model container [2021-11-21 00:21:28,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:21:27" (2/3) ... [2021-11-21 00:21:28,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c6ce52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:21:28, skipping insertion in model container [2021-11-21 00:21:28,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:21:28" (3/3) ... [2021-11-21 00:21:28,728 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec5_productSimulator.cil.c [2021-11-21 00:21:28,749 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:21:28,749 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:21:28,843 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:21:28,850 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:21:28,851 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:21:28,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 110 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 82 states have internal predecessors, (93), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-21 00:21:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-21 00:21:28,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:28,908 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:21:28,908 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:28,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2053669219, now seen corresponding path program 1 times [2021-11-21 00:21:28,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:28,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437510602] [2021-11-21 00:21:28,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:28,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:21:29,197 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:29,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437510602] [2021-11-21 00:21:29,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437510602] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:21:29,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:21:29,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-21 00:21:29,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336076707] [2021-11-21 00:21:29,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:21:29,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-21 00:21:29,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:21:29,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-21 00:21:29,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:21:29,236 INFO L87 Difference]: Start difference. First operand has 110 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 82 states have internal predecessors, (93), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:21:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:29,315 INFO L93 Difference]: Finished difference Result 204 states and 288 transitions. [2021-11-21 00:21:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-21 00:21:29,318 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2021-11-21 00:21:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:29,329 INFO L225 Difference]: With dead ends: 204 [2021-11-21 00:21:29,329 INFO L226 Difference]: Without dead ends: 105 [2021-11-21 00:21:29,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-21 00:21:29,338 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:29,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:21:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-21 00:21:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-21 00:21:29,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 78 states have internal predecessors, (85), 30 states have call successors, (30), 12 states have call predecessors, (30), 11 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-21 00:21:29,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 144 transitions. [2021-11-21 00:21:29,416 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 144 transitions. Word has length 45 [2021-11-21 00:21:29,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:29,419 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 144 transitions. [2021-11-21 00:21:29,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:21:29,419 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 144 transitions. [2021-11-21 00:21:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-21 00:21:29,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:29,424 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:21:29,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:21:29,424 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:29,425 INFO L85 PathProgramCache]: Analyzing trace with hash -300617056, now seen corresponding path program 1 times [2021-11-21 00:21:29,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:29,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355720171] [2021-11-21 00:21:29,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:29,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:21:29,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:29,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355720171] [2021-11-21 00:21:29,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355720171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:21:29,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:21:29,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:21:29,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678685634] [2021-11-21 00:21:29,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:21:29,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:21:29,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:21:29,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:21:29,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:21:29,575 INFO L87 Difference]: Start difference. First operand 105 states and 144 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:21:29,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:29,638 INFO L93 Difference]: Finished difference Result 167 states and 229 transitions. [2021-11-21 00:21:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:21:29,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2021-11-21 00:21:29,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:29,641 INFO L225 Difference]: With dead ends: 167 [2021-11-21 00:21:29,642 INFO L226 Difference]: Without dead ends: 97 [2021-11-21 00:21:29,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:21:29,645 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 16 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:29,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 212 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:21:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-21 00:21:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-21 00:21:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 73 states have internal predecessors, (79), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (27), 22 states have call predecessors, (27), 27 states have call successors, (27) [2021-11-21 00:21:29,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2021-11-21 00:21:29,663 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 46 [2021-11-21 00:21:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:29,664 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2021-11-21 00:21:29,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-21 00:21:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2021-11-21 00:21:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-21 00:21:29,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:29,667 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:21:29,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:21:29,681 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:29,682 INFO L85 PathProgramCache]: Analyzing trace with hash -508373362, now seen corresponding path program 1 times [2021-11-21 00:21:29,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:29,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132786271] [2021-11-21 00:21:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:29,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-21 00:21:29,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:29,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132786271] [2021-11-21 00:21:29,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132786271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:21:29,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:21:29,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:21:29,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958745103] [2021-11-21 00:21:29,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:21:29,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:21:29,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:21:29,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:21:29,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:21:29,900 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-21 00:21:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:30,204 INFO L93 Difference]: Finished difference Result 235 states and 337 transitions. [2021-11-21 00:21:30,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:21:30,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-11-21 00:21:30,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:30,208 INFO L225 Difference]: With dead ends: 235 [2021-11-21 00:21:30,208 INFO L226 Difference]: Without dead ends: 154 [2021-11-21 00:21:30,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:21:30,212 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 81 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:30,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 538 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:21:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-21 00:21:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2021-11-21 00:21:30,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 112 states have internal predecessors, (126), 35 states have call successors, (35), 19 states have call predecessors, (35), 19 states have return successors, (45), 33 states have call predecessors, (45), 35 states have call successors, (45) [2021-11-21 00:21:30,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 206 transitions. [2021-11-21 00:21:30,247 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 206 transitions. Word has length 49 [2021-11-21 00:21:30,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:30,248 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 206 transitions. [2021-11-21 00:21:30,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-21 00:21:30,249 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 206 transitions. [2021-11-21 00:21:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-21 00:21:30,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:30,252 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:21:30,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:21:30,252 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:30,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:30,253 INFO L85 PathProgramCache]: Analyzing trace with hash -350046951, now seen corresponding path program 1 times [2021-11-21 00:21:30,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:30,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208185078] [2021-11-21 00:21:30,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:30,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:30,517 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:21:30,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:30,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208185078] [2021-11-21 00:21:30,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208185078] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:21:30,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:21:30,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:21:30,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972848238] [2021-11-21 00:21:30,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:21:30,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:21:30,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:21:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:21:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:21:30,523 INFO L87 Difference]: Start difference. First operand 150 states and 206 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-21 00:21:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:30,857 INFO L93 Difference]: Finished difference Result 421 states and 589 transitions. [2021-11-21 00:21:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:21:30,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) Word has length 67 [2021-11-21 00:21:30,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:30,873 INFO L225 Difference]: With dead ends: 421 [2021-11-21 00:21:30,873 INFO L226 Difference]: Without dead ends: 287 [2021-11-21 00:21:30,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:21:30,884 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 193 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:30,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 440 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:21:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-21 00:21:30,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 240. [2021-11-21 00:21:30,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 157 states have (on average 1.3184713375796178) internal successors, (207), 180 states have internal predecessors, (207), 50 states have call successors, (50), 29 states have call predecessors, (50), 32 states have return successors, (69), 50 states have call predecessors, (69), 50 states have call successors, (69) [2021-11-21 00:21:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 326 transitions. [2021-11-21 00:21:30,963 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 326 transitions. Word has length 67 [2021-11-21 00:21:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:30,965 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 326 transitions. [2021-11-21 00:21:30,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 3 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-21 00:21:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 326 transitions. [2021-11-21 00:21:30,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-21 00:21:30,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:30,973 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-11-21 00:21:30,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:21:30,973 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:30,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:30,975 INFO L85 PathProgramCache]: Analyzing trace with hash -307795689, now seen corresponding path program 1 times [2021-11-21 00:21:30,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:30,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799426139] [2021-11-21 00:21:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:30,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-21 00:21:31,202 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:31,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799426139] [2021-11-21 00:21:31,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799426139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:21:31,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:21:31,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 00:21:31,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310641054] [2021-11-21 00:21:31,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:21:31,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:21:31,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:21:31,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:21:31,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:21:31,216 INFO L87 Difference]: Start difference. First operand 240 states and 326 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-21 00:21:31,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:31,867 INFO L93 Difference]: Finished difference Result 593 states and 814 transitions. [2021-11-21 00:21:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:21:31,868 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2021-11-21 00:21:31,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:31,872 INFO L225 Difference]: With dead ends: 593 [2021-11-21 00:21:31,873 INFO L226 Difference]: Without dead ends: 420 [2021-11-21 00:21:31,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:21:31,875 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 412 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:31,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 423 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:21:31,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-11-21 00:21:31,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 381. [2021-11-21 00:21:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 253 states have (on average 1.3122529644268774) internal successors, (332), 290 states have internal predecessors, (332), 76 states have call successors, (76), 43 states have call predecessors, (76), 51 states have return successors, (107), 82 states have call predecessors, (107), 76 states have call successors, (107) [2021-11-21 00:21:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 515 transitions. [2021-11-21 00:21:31,919 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 515 transitions. Word has length 70 [2021-11-21 00:21:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:31,919 INFO L470 AbstractCegarLoop]: Abstraction has 381 states and 515 transitions. [2021-11-21 00:21:31,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 5 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-21 00:21:31,920 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 515 transitions. [2021-11-21 00:21:31,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-21 00:21:31,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:31,922 INFO L514 BasicCegarLoop]: trace histogram [6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:21:31,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:21:31,923 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:31,924 INFO L85 PathProgramCache]: Analyzing trace with hash 193950282, now seen corresponding path program 1 times [2021-11-21 00:21:31,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:31,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709484827] [2021-11-21 00:21:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:31,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:31,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-21 00:21:32,016 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:32,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709484827] [2021-11-21 00:21:32,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709484827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:21:32,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:21:32,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-21 00:21:32,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395474027] [2021-11-21 00:21:32,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:21:32,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:21:32,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:21:32,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:21:32,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:21:32,018 INFO L87 Difference]: Start difference. First operand 381 states and 515 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 00:21:32,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:21:32,603 INFO L93 Difference]: Finished difference Result 802 states and 1146 transitions. [2021-11-21 00:21:32,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:21:32,603 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 88 [2021-11-21 00:21:32,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:21:32,609 INFO L225 Difference]: With dead ends: 802 [2021-11-21 00:21:32,609 INFO L226 Difference]: Without dead ends: 608 [2021-11-21 00:21:32,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:21:32,612 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 198 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:21:32,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 804 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 00:21:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-21 00:21:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 553. [2021-11-21 00:21:32,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 371 states have (on average 1.3099730458221024) internal successors, (486), 420 states have internal predecessors, (486), 104 states have call successors, (104), 67 states have call predecessors, (104), 77 states have return successors, (157), 110 states have call predecessors, (157), 104 states have call successors, (157) [2021-11-21 00:21:32,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 747 transitions. [2021-11-21 00:21:32,669 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 747 transitions. Word has length 88 [2021-11-21 00:21:32,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:21:32,670 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 747 transitions. [2021-11-21 00:21:32,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 states have internal predecessors, (46), 2 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-21 00:21:32,670 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 747 transitions. [2021-11-21 00:21:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-21 00:21:32,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:21:32,674 INFO L514 BasicCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:21:32,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:21:32,675 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:21:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:21:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash 139352533, now seen corresponding path program 1 times [2021-11-21 00:21:32,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:21:32,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487736367] [2021-11-21 00:21:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:32,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:21:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-21 00:21:32,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:32,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487736367] [2021-11-21 00:21:32,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487736367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:21:32,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338668996] [2021-11-21 00:21:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:21:32,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:21:32,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:21:32,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:21:32,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:21:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:21:32,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:21:32,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:21:33,344 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-21 00:21:33,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:21:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-21 00:21:33,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338668996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:21:33,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1774817349] [2021-11-21 00:21:33,721 INFO L159 IcfgInterpreter]: Started Sifa with 61 locations of interest [2021-11-21 00:21:33,722 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:21:33,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:21:33,732 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:21:33,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:23:18,802 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 72 for LOIs [2021-11-21 00:23:18,975 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 69 for LOIs [2021-11-21 00:23:23,798 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 64 for LOIs [2021-11-21 00:23:24,759 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 87 for LOIs [2021-11-21 00:23:25,221 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2021-11-21 00:23:25,484 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 62 for LOIs [2021-11-21 00:23:27,774 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 64 for LOIs [2021-11-21 00:23:27,895 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:23:44,299 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:23:44,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:23:44,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2021-11-21 00:23:44,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475213988] [2021-11-21 00:23:44,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:23:44,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:23:44,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:23:44,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:23:44,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2988, Unknown=0, NotChecked=0, Total=3306 [2021-11-21 00:23:44,303 INFO L87 Difference]: Start difference. First operand 553 states and 747 transitions. Second operand has 10 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 7 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-21 00:23:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:23:45,309 INFO L93 Difference]: Finished difference Result 1099 states and 1502 transitions. [2021-11-21 00:23:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 00:23:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 7 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) Word has length 106 [2021-11-21 00:23:45,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:23:45,316 INFO L225 Difference]: With dead ends: 1099 [2021-11-21 00:23:45,316 INFO L226 Difference]: Without dead ends: 632 [2021-11-21 00:23:45,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=422, Invalid=4548, Unknown=0, NotChecked=0, Total=4970 [2021-11-21 00:23:45,322 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 256 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:23:45,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 1032 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:23:45,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-11-21 00:23:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 543. [2021-11-21 00:23:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 356 states have (on average 1.2865168539325842) internal successors, (458), 400 states have internal predecessors, (458), 105 states have call successors, (105), 74 states have call predecessors, (105), 81 states have return successors, (147), 109 states have call predecessors, (147), 105 states have call successors, (147) [2021-11-21 00:23:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 710 transitions. [2021-11-21 00:23:45,381 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 710 transitions. Word has length 106 [2021-11-21 00:23:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:23:45,381 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 710 transitions. [2021-11-21 00:23:45,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 13.375) internal successors, (107), 9 states have internal predecessors, (107), 7 states have call successors, (27), 5 states have call predecessors, (27), 7 states have return successors, (31), 7 states have call predecessors, (31), 7 states have call successors, (31) [2021-11-21 00:23:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 710 transitions. [2021-11-21 00:23:45,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-21 00:23:45,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:23:45,392 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 00:23:45,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:23:45,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:45,616 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:23:45,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:23:45,616 INFO L85 PathProgramCache]: Analyzing trace with hash 567515878, now seen corresponding path program 1 times [2021-11-21 00:23:45,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:23:45,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711992608] [2021-11-21 00:23:45,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:45,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:23:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:23:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-21 00:23:45,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:23:45,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711992608] [2021-11-21 00:23:45,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711992608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:23:45,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688760004] [2021-11-21 00:23:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:45,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:45,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:23:45,725 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:23:45,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:23:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:23:45,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:23:45,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:23:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-21 00:23:46,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:23:46,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688760004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:23:46,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:23:46,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2021-11-21 00:23:46,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130752706] [2021-11-21 00:23:46,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:23:46,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:23:46,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:23:46,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:23:46,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:23:46,051 INFO L87 Difference]: Start difference. First operand 543 states and 710 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 00:23:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:23:46,151 INFO L93 Difference]: Finished difference Result 1222 states and 1618 transitions. [2021-11-21 00:23:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:23:46,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 131 [2021-11-21 00:23:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:23:46,157 INFO L225 Difference]: With dead ends: 1222 [2021-11-21 00:23:46,157 INFO L226 Difference]: Without dead ends: 714 [2021-11-21 00:23:46,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:23:46,161 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 36 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:23:46,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 254 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:23:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-11-21 00:23:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 697. [2021-11-21 00:23:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 462 states have (on average 1.29004329004329) internal successors, (596), 519 states have internal predecessors, (596), 131 states have call successors, (131), 95 states have call predecessors, (131), 103 states have return successors, (186), 132 states have call predecessors, (186), 131 states have call successors, (186) [2021-11-21 00:23:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 913 transitions. [2021-11-21 00:23:46,214 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 913 transitions. Word has length 131 [2021-11-21 00:23:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:23:46,214 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 913 transitions. [2021-11-21 00:23:46,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-21 00:23:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 913 transitions. [2021-11-21 00:23:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-21 00:23:46,219 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:23:46,220 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:23:46,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:23:46,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 00:23:46,433 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:23:46,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:23:46,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1334016935, now seen corresponding path program 2 times [2021-11-21 00:23:46,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:23:46,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952649574] [2021-11-21 00:23:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:23:46,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:23:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:23:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-21 00:23:46,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:23:46,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952649574] [2021-11-21 00:23:46,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952649574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:23:46,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116262259] [2021-11-21 00:23:46,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:23:46,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:23:46,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:23:46,574 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:23:46,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:23:46,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:23:46,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:23:46,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 00:23:46,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:23:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 77 proven. 3 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-21 00:23:47,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:23:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-21 00:23:47,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116262259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:23:47,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [262091690] [2021-11-21 00:23:47,770 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2021-11-21 00:23:47,770 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:23:47,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:23:47,771 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:23:47,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:26:05,937 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 72 for LOIs [2021-11-21 00:26:06,065 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 69 for LOIs [2021-11-21 00:26:11,601 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 66 for LOIs [2021-11-21 00:26:12,330 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 61 for LOIs [2021-11-21 00:26:12,433 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2021-11-21 00:26:12,669 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 64 for LOIs [2021-11-21 00:26:15,013 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 65 for LOIs [2021-11-21 00:26:15,121 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 70 for LOIs [2021-11-21 00:26:15,263 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:26:35,369 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:26:35,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:26:35,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 22 [2021-11-21 00:26:35,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746425419] [2021-11-21 00:26:35,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:26:35,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 00:26:35,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:26:35,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 00:26:35,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=5798, Unknown=0, NotChecked=0, Total=6320 [2021-11-21 00:26:35,374 INFO L87 Difference]: Start difference. First operand 697 states and 913 transitions. Second operand has 22 states, 19 states have (on average 7.315789473684211) internal successors, (139), 20 states have internal predecessors, (139), 10 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) [2021-11-21 00:26:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:26:40,753 INFO L93 Difference]: Finished difference Result 2312 states and 3143 transitions. [2021-11-21 00:26:40,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-21 00:26:40,754 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 7.315789473684211) internal successors, (139), 20 states have internal predecessors, (139), 10 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) Word has length 149 [2021-11-21 00:26:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:26:40,768 INFO L225 Difference]: With dead ends: 2312 [2021-11-21 00:26:40,768 INFO L226 Difference]: Without dead ends: 1655 [2021-11-21 00:26:40,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9953 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=1968, Invalid=24114, Unknown=0, NotChecked=0, Total=26082 [2021-11-21 00:26:40,787 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 1645 mSDsluCounter, 2530 mSDsCounter, 0 mSdLazyCounter, 3730 mSolverCounterSat, 1505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 2561 SdHoareTripleChecker+Invalid, 5235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1505 IncrementalHoareTripleChecker+Valid, 3730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:26:40,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1649 Valid, 2561 Invalid, 5235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1505 Valid, 3730 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-21 00:26:40,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-11-21 00:26:40,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1104. [2021-11-21 00:26:40,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 723 states have (on average 1.2669432918395573) internal successors, (916), 814 states have internal predecessors, (916), 205 states have call successors, (205), 157 states have call predecessors, (205), 175 states have return successors, (315), 209 states have call predecessors, (315), 205 states have call successors, (315) [2021-11-21 00:26:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1436 transitions. [2021-11-21 00:26:40,896 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1436 transitions. Word has length 149 [2021-11-21 00:26:40,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:26:40,897 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1436 transitions. [2021-11-21 00:26:40,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 7.315789473684211) internal successors, (139), 20 states have internal predecessors, (139), 10 states have call successors, (32), 7 states have call predecessors, (32), 9 states have return successors, (33), 12 states have call predecessors, (33), 10 states have call successors, (33) [2021-11-21 00:26:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1436 transitions. [2021-11-21 00:26:40,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-21 00:26:40,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:26:40,905 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 00:26:40,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:26:41,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:26:41,120 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:26:41,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:26:41,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1051969494, now seen corresponding path program 1 times [2021-11-21 00:26:41,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:26:41,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15638082] [2021-11-21 00:26:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:41,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:26:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-21 00:26:41,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:26:41,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15638082] [2021-11-21 00:26:41,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15638082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:26:41,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880539774] [2021-11-21 00:26:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:41,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:26:41,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:26:41,198 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:26:41,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:26:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:41,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:26:41,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:26:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-21 00:26:41,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:26:41,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880539774] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:26:41,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:26:41,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-21 00:26:41,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637456401] [2021-11-21 00:26:41,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:26:41,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:26:41,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:26:41,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:26:41,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:26:41,586 INFO L87 Difference]: Start difference. First operand 1104 states and 1436 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 00:26:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:26:41,745 INFO L93 Difference]: Finished difference Result 3011 states and 3984 transitions. [2021-11-21 00:26:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:26:41,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 141 [2021-11-21 00:26:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:26:41,759 INFO L225 Difference]: With dead ends: 3011 [2021-11-21 00:26:41,760 INFO L226 Difference]: Without dead ends: 1940 [2021-11-21 00:26:41,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:26:41,766 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 73 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:26:41,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 256 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:26:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-11-21 00:26:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1911. [2021-11-21 00:26:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1270 states have (on average 1.252755905511811) internal successors, (1591), 1421 states have internal predecessors, (1591), 336 states have call successors, (336), 269 states have call predecessors, (336), 304 states have return successors, (551), 340 states have call predecessors, (551), 336 states have call successors, (551) [2021-11-21 00:26:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2478 transitions. [2021-11-21 00:26:41,931 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2478 transitions. Word has length 141 [2021-11-21 00:26:41,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:26:41,931 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 2478 transitions. [2021-11-21 00:26:41,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 00:26:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2478 transitions. [2021-11-21 00:26:41,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-21 00:26:41,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:26:41,940 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 00:26:41,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:26:42,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 00:26:42,153 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:26:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:26:42,154 INFO L85 PathProgramCache]: Analyzing trace with hash -334588306, now seen corresponding path program 1 times [2021-11-21 00:26:42,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:26:42,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157676918] [2021-11-21 00:26:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:42,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:26:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-21 00:26:42,218 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:26:42,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157676918] [2021-11-21 00:26:42,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157676918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:26:42,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675038678] [2021-11-21 00:26:42,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:42,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:26:42,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:26:42,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:26:42,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:26:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:42,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:26:42,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:26:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-21 00:26:42,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:26:42,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675038678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:26:42,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:26:42,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-21 00:26:42,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646308076] [2021-11-21 00:26:42,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:26:42,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:26:42,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:26:42,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:26:42,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:26:42,564 INFO L87 Difference]: Start difference. First operand 1911 states and 2478 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 00:26:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:26:42,817 INFO L93 Difference]: Finished difference Result 5373 states and 7275 transitions. [2021-11-21 00:26:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:26:42,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 141 [2021-11-21 00:26:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:26:42,844 INFO L225 Difference]: With dead ends: 5373 [2021-11-21 00:26:42,844 INFO L226 Difference]: Without dead ends: 3480 [2021-11-21 00:26:42,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:26:42,855 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 72 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:26:42,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 268 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:26:42,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-11-21 00:26:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3460. [2021-11-21 00:26:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3460 states, 2322 states have (on average 1.2472006890611542) internal successors, (2896), 2573 states have internal predecessors, (2896), 587 states have call successors, (587), 498 states have call predecessors, (587), 550 states have return successors, (1094), 579 states have call predecessors, (1094), 587 states have call successors, (1094) [2021-11-21 00:26:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3460 states to 3460 states and 4577 transitions. [2021-11-21 00:26:43,172 INFO L78 Accepts]: Start accepts. Automaton has 3460 states and 4577 transitions. Word has length 141 [2021-11-21 00:26:43,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:26:43,172 INFO L470 AbstractCegarLoop]: Abstraction has 3460 states and 4577 transitions. [2021-11-21 00:26:43,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 00:26:43,173 INFO L276 IsEmpty]: Start isEmpty. Operand 3460 states and 4577 transitions. [2021-11-21 00:26:43,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-21 00:26:43,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:26:43,186 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 00:26:43,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:26:43,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:26:43,401 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:26:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:26:43,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1212367357, now seen corresponding path program 1 times [2021-11-21 00:26:43,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:26:43,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942129364] [2021-11-21 00:26:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:43,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:26:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-21 00:26:43,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:26:43,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942129364] [2021-11-21 00:26:43,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942129364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:26:43,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:26:43,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:26:43,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942080369] [2021-11-21 00:26:43,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:26:43,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:26:43,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:26:43,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:26:43,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:26:43,545 INFO L87 Difference]: Start difference. First operand 3460 states and 4577 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-21 00:26:44,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:26:44,347 INFO L93 Difference]: Finished difference Result 8799 states and 11779 transitions. [2021-11-21 00:26:44,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 00:26:44,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 143 [2021-11-21 00:26:44,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:26:44,400 INFO L225 Difference]: With dead ends: 8799 [2021-11-21 00:26:44,400 INFO L226 Difference]: Without dead ends: 6593 [2021-11-21 00:26:44,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:26:44,411 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 216 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:26:44,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 701 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:26:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2021-11-21 00:26:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 6559. [2021-11-21 00:26:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6559 states, 4416 states have (on average 1.247282608695652) internal successors, (5508), 4872 states have internal predecessors, (5508), 1101 states have call successors, (1101), 953 states have call predecessors, (1101), 1041 states have return successors, (2045), 1087 states have call predecessors, (2045), 1101 states have call successors, (2045) [2021-11-21 00:26:45,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6559 states to 6559 states and 8654 transitions. [2021-11-21 00:26:45,111 INFO L78 Accepts]: Start accepts. Automaton has 6559 states and 8654 transitions. Word has length 143 [2021-11-21 00:26:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:26:45,112 INFO L470 AbstractCegarLoop]: Abstraction has 6559 states and 8654 transitions. [2021-11-21 00:26:45,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2021-11-21 00:26:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 6559 states and 8654 transitions. [2021-11-21 00:26:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-21 00:26:45,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:26:45,142 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 00:26:45,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:26:45,143 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:26:45,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:26:45,144 INFO L85 PathProgramCache]: Analyzing trace with hash 109589258, now seen corresponding path program 1 times [2021-11-21 00:26:45,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:26:45,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650803108] [2021-11-21 00:26:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:45,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:26:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-21 00:26:45,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:26:45,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650803108] [2021-11-21 00:26:45,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650803108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:26:45,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766717413] [2021-11-21 00:26:45,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:45,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:26:45,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:26:45,221 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:26:45,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:26:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:26:45,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:26:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-21 00:26:45,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:26:45,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766717413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:26:45,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:26:45,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 3 [2021-11-21 00:26:45,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738445799] [2021-11-21 00:26:45,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:26:45,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:26:45,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:26:45,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:26:45,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:26:45,651 INFO L87 Difference]: Start difference. First operand 6559 states and 8654 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-21 00:26:46,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:26:46,124 INFO L93 Difference]: Finished difference Result 10241 states and 13415 transitions. [2021-11-21 00:26:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:26:46,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 151 [2021-11-21 00:26:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:26:46,176 INFO L225 Difference]: With dead ends: 10241 [2021-11-21 00:26:46,176 INFO L226 Difference]: Without dead ends: 6839 [2021-11-21 00:26:46,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:26:46,192 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 52 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:26:46,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 292 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:26:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6839 states. [2021-11-21 00:26:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6839 to 5525. [2021-11-21 00:26:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5525 states, 3736 states have (on average 1.243576017130621) internal successors, (4646), 4114 states have internal predecessors, (4646), 914 states have call successors, (914), 810 states have call predecessors, (914), 874 states have return successors, (1471), 896 states have call predecessors, (1471), 914 states have call successors, (1471) [2021-11-21 00:26:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5525 states to 5525 states and 7031 transitions. [2021-11-21 00:26:46,776 INFO L78 Accepts]: Start accepts. Automaton has 5525 states and 7031 transitions. Word has length 151 [2021-11-21 00:26:46,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:26:46,777 INFO L470 AbstractCegarLoop]: Abstraction has 5525 states and 7031 transitions. [2021-11-21 00:26:46,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2021-11-21 00:26:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5525 states and 7031 transitions. [2021-11-21 00:26:46,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-21 00:26:46,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:26:46,798 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 00:26:46,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:26:47,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:26:47,025 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:26:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:26:47,026 INFO L85 PathProgramCache]: Analyzing trace with hash 423489579, now seen corresponding path program 1 times [2021-11-21 00:26:47,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:26:47,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242211687] [2021-11-21 00:26:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:47,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:26:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 39 proven. 11 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-11-21 00:26:47,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:26:47,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242211687] [2021-11-21 00:26:47,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242211687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:26:47,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918463682] [2021-11-21 00:26:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:47,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:26:47,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:26:47,105 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:26:47,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:26:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:47,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:26:47,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:26:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-21 00:26:47,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:26:47,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918463682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:26:47,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:26:47,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-21 00:26:47,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929299963] [2021-11-21 00:26:47,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:26:47,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:26:47,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:26:47,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:26:47,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:26:47,443 INFO L87 Difference]: Start difference. First operand 5525 states and 7031 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 00:26:47,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:26:47,885 INFO L93 Difference]: Finished difference Result 8119 states and 10228 transitions. [2021-11-21 00:26:47,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:26:47,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 143 [2021-11-21 00:26:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:26:47,946 INFO L225 Difference]: With dead ends: 8119 [2021-11-21 00:26:47,947 INFO L226 Difference]: Without dead ends: 5557 [2021-11-21 00:26:47,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:26:47,957 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 62 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:26:47,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 304 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:26:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5557 states. [2021-11-21 00:26:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5557 to 5499. [2021-11-21 00:26:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5499 states, 3715 states have (on average 1.2398384925975774) internal successors, (4606), 4092 states have internal predecessors, (4606), 915 states have call successors, (915), 814 states have call predecessors, (915), 868 states have return successors, (1308), 886 states have call predecessors, (1308), 915 states have call successors, (1308) [2021-11-21 00:26:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5499 states to 5499 states and 6829 transitions. [2021-11-21 00:26:48,494 INFO L78 Accepts]: Start accepts. Automaton has 5499 states and 6829 transitions. Word has length 143 [2021-11-21 00:26:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:26:48,495 INFO L470 AbstractCegarLoop]: Abstraction has 5499 states and 6829 transitions. [2021-11-21 00:26:48,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-21 00:26:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 5499 states and 6829 transitions. [2021-11-21 00:26:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-21 00:26:48,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:26:48,517 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-21 00:26:48,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 00:26:48,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:26:48,745 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:26:48,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:26:48,746 INFO L85 PathProgramCache]: Analyzing trace with hash 766411790, now seen corresponding path program 1 times [2021-11-21 00:26:48,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:26:48,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849055714] [2021-11-21 00:26:48,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:48,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:26:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-21 00:26:49,201 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:26:49,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849055714] [2021-11-21 00:26:49,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849055714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:26:49,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721022503] [2021-11-21 00:26:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:26:49,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:26:49,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:26:49,202 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:26:49,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:26:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:26:49,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-21 00:26:49,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:26:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 77 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-21 00:26:49,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:26:51,338 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 49 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-21 00:26:51,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721022503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:26:51,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1006470483] [2021-11-21 00:26:51,342 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2021-11-21 00:26:51,342 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:26:51,343 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:26:51,343 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:26:51,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:29:07,547 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 72 for LOIs [2021-11-21 00:29:07,714 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 69 for LOIs [2021-11-21 00:29:14,785 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__methaneAlarm with input of size 64 for LOIs [2021-11-21 00:29:19,319 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 80 for LOIs [2021-11-21 00:29:20,063 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 88 for LOIs [2021-11-21 00:29:20,540 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__before__lowWaterSensor with input of size 65 for LOIs [2021-11-21 00:29:24,016 INFO L197 IcfgInterpreter]: Interpreting procedure activatePump__before__methaneQuery with input of size 68 for LOIs [2021-11-21 00:29:24,183 INFO L197 IcfgInterpreter]: Interpreting procedure deactivatePump with input of size 71 for LOIs [2021-11-21 00:29:24,370 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:29:42,076 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:29:42,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 00:29:42,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13, 11] total 33 [2021-11-21 00:29:42,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627061966] [2021-11-21 00:29:42,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 00:29:42,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-21 00:29:42,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:29:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-21 00:29:42,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=684, Invalid=6626, Unknown=0, NotChecked=0, Total=7310 [2021-11-21 00:29:42,083 INFO L87 Difference]: Start difference. First operand 5499 states and 6829 transitions. Second operand has 33 states, 32 states have (on average 5.875) internal successors, (188), 32 states have internal predecessors, (188), 22 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (51), 20 states have call predecessors, (51), 22 states have call successors, (51) [2021-11-21 00:29:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:29:48,412 INFO L93 Difference]: Finished difference Result 15929 states and 21378 transitions. [2021-11-21 00:29:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-21 00:29:48,414 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.875) internal successors, (188), 32 states have internal predecessors, (188), 22 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (51), 20 states have call predecessors, (51), 22 states have call successors, (51) Word has length 145 [2021-11-21 00:29:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:29:48,495 INFO L225 Difference]: With dead ends: 15929 [2021-11-21 00:29:48,495 INFO L226 Difference]: Without dead ends: 13100 [2021-11-21 00:29:48,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 400 SyntacticMatches, 7 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9918 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=1892, Invalid=20758, Unknown=0, NotChecked=0, Total=22650 [2021-11-21 00:29:48,522 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 3300 mSDsluCounter, 2087 mSDsCounter, 0 mSdLazyCounter, 5053 mSolverCounterSat, 2216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3308 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 7269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2216 IncrementalHoareTripleChecker+Valid, 5053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:29:48,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3308 Valid, 2000 Invalid, 7269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2216 Valid, 5053 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-11-21 00:29:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13100 states. [2021-11-21 00:29:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13100 to 8689. [2021-11-21 00:29:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8689 states, 5909 states have (on average 1.2359113217126418) internal successors, (7303), 6461 states have internal predecessors, (7303), 1445 states have call successors, (1445), 1260 states have call predecessors, (1445), 1334 states have return successors, (1966), 1390 states have call predecessors, (1966), 1445 states have call successors, (1966) [2021-11-21 00:29:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8689 states to 8689 states and 10714 transitions. [2021-11-21 00:29:49,437 INFO L78 Accepts]: Start accepts. Automaton has 8689 states and 10714 transitions. Word has length 145 [2021-11-21 00:29:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:29:49,438 INFO L470 AbstractCegarLoop]: Abstraction has 8689 states and 10714 transitions. [2021-11-21 00:29:49,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.875) internal successors, (188), 32 states have internal predecessors, (188), 22 states have call successors, (49), 12 states have call predecessors, (49), 14 states have return successors, (51), 20 states have call predecessors, (51), 22 states have call successors, (51) [2021-11-21 00:29:49,439 INFO L276 IsEmpty]: Start isEmpty. Operand 8689 states and 10714 transitions. [2021-11-21 00:29:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-21 00:29:49,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:29:49,467 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:29:49,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:29:49,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 00:29:49,681 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:29:49,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:29:49,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1772215503, now seen corresponding path program 1 times [2021-11-21 00:29:49,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:29:49,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768316501] [2021-11-21 00:29:49,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:29:49,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:29:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:29:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 71 proven. 34 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-11-21 00:29:49,734 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:29:49,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768316501] [2021-11-21 00:29:49,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768316501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:29:49,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407764215] [2021-11-21 00:29:49,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:29:49,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:29:49,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:29:49,736 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:29:49,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:29:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:29:49,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:29:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:29:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-21 00:29:50,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:29:50,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407764215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:29:50,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:29:50,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-21 00:29:50,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523988779] [2021-11-21 00:29:50,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:29:50,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:29:50,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:29:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:29:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:29:50,169 INFO L87 Difference]: Start difference. First operand 8689 states and 10714 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-21 00:29:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:29:50,749 INFO L93 Difference]: Finished difference Result 18612 states and 23370 transitions. [2021-11-21 00:29:50,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:29:50,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 175 [2021-11-21 00:29:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:29:50,807 INFO L225 Difference]: With dead ends: 18612 [2021-11-21 00:29:50,807 INFO L226 Difference]: Without dead ends: 10251 [2021-11-21 00:29:50,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:29:50,840 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 75 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:29:50,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 238 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:29:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10251 states. [2021-11-21 00:29:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10251 to 10203. [2021-11-21 00:29:51,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10203 states, 7006 states have (on average 1.2259491864116472) internal successors, (8589), 7551 states have internal predecessors, (8589), 1624 states have call successors, (1624), 1515 states have call predecessors, (1624), 1572 states have return successors, (2395), 1543 states have call predecessors, (2395), 1624 states have call successors, (2395) [2021-11-21 00:29:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10203 states to 10203 states and 12608 transitions. [2021-11-21 00:29:51,898 INFO L78 Accepts]: Start accepts. Automaton has 10203 states and 12608 transitions. Word has length 175 [2021-11-21 00:29:51,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:29:51,899 INFO L470 AbstractCegarLoop]: Abstraction has 10203 states and 12608 transitions. [2021-11-21 00:29:51,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-21 00:29:51,900 INFO L276 IsEmpty]: Start isEmpty. Operand 10203 states and 12608 transitions. [2021-11-21 00:29:51,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-21 00:29:51,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:29:51,937 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:29:51,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 00:29:52,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 00:29:52,153 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:29:52,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:29:52,154 INFO L85 PathProgramCache]: Analyzing trace with hash 870997424, now seen corresponding path program 1 times [2021-11-21 00:29:52,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:29:52,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220112457] [2021-11-21 00:29:52,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:29:52,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:29:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:29:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 84 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-21 00:29:52,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:29:52,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220112457] [2021-11-21 00:29:52,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220112457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:29:52,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4213832] [2021-11-21 00:29:52,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:29:52,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:29:52,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:29:52,594 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:29:52,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_730d88c0-7337-4f74-8278-653bfa50e255/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:29:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:29:52,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-21 00:29:52,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:29:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 103 proven. 60 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-21 00:29:53,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:29:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 63 proven. 49 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-21 00:29:56,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4213832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:29:56,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1222109238] [2021-11-21 00:29:56,336 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2021-11-21 00:29:56,337 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:29:56,337 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:29:56,338 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:29:56,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:33:44,660 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 68 for LOIs [2021-11-21 00:33:44,816 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 67 for LOIs