./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec4_product42.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec4_product42.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V --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 190527f0b5c755657048457e241e1db06174c0bd15c9c37dddb3c55b0e7d73ce --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:15:27,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:15:27,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:15:27,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:15:27,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:15:27,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:15:27,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:15:27,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:15:27,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:15:27,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:15:27,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:15:27,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:15:27,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:15:27,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:15:27,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:15:27,587 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:15:27,589 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:15:27,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:15:27,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:15:27,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:15:27,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:15:27,607 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:15:27,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:15:27,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:15:27,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:15:27,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:15:27,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:15:27,615 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:15:27,616 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:15:27,617 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:15:27,617 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:15:27,618 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:15:27,619 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:15:27,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:15:27,622 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:15:27,622 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:15:27,623 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:15:27,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:15:27,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:15:27,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:15:27,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:15:27,626 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:15:27,651 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:15:27,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:15:27,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:15:27,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:15:27,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:15:27,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:15:27,654 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:15:27,654 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:15:27,654 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:15:27,654 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:15:27,655 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:15:27,655 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:15:27,655 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:15:27,655 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:15:27,656 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:15:27,656 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:15:27,656 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:15:27,656 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:15:27,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:15:27,658 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:15:27,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:15:27,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:15:27,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:15:27,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:15:27,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:15:27,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:15:27,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:15:27,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:15:27,660 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:15:27,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:15:27,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:15:27,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:15:27,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:15:27,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:15:27,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:15:27,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:15:27,662 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:15:27,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:15:27,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:15:27,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:15:27,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:15:27,663 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_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 190527f0b5c755657048457e241e1db06174c0bd15c9c37dddb3c55b0e7d73ce [2021-11-23 03:15:27,908 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:15:27,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:15:27,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:15:27,934 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:15:27,935 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:15:27,936 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/minepump_spec4_product42.cil.c [2021-11-23 03:15:28,007 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/data/5bb3e5e7d/a49edc15b5e544669e6ed6dacb339170/FLAG5e0ecbfea [2021-11-23 03:15:28,644 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:15:28,651 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/sv-benchmarks/c/product-lines/minepump_spec4_product42.cil.c [2021-11-23 03:15:28,676 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/data/5bb3e5e7d/a49edc15b5e544669e6ed6dacb339170/FLAG5e0ecbfea [2021-11-23 03:15:28,913 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/data/5bb3e5e7d/a49edc15b5e544669e6ed6dacb339170 [2021-11-23 03:15:28,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:15:28,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:15:28,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:15:28,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:15:28,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:15:28,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:15:28" (1/1) ... [2021-11-23 03:15:28,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29f2f958 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:28, skipping insertion in model container [2021-11-23 03:15:28,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:15:28" (1/1) ... [2021-11-23 03:15:28,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:15:29,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:15:29,396 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_19985a72-63f1-48cc-9ebd-cf298c95ecb4/sv-benchmarks/c/product-lines/minepump_spec4_product42.cil.c[17943,17956] [2021-11-23 03:15:29,398 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:15:29,407 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:15:29,473 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_19985a72-63f1-48cc-9ebd-cf298c95ecb4/sv-benchmarks/c/product-lines/minepump_spec4_product42.cil.c[17943,17956] [2021-11-23 03:15:29,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:15:29,492 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:15:29,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:29 WrapperNode [2021-11-23 03:15:29,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:15:29,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:15:29,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:15:29,494 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:15:29,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:29" (1/1) ... [2021-11-23 03:15:29,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:29" (1/1) ... [2021-11-23 03:15:29,554 INFO L137 Inliner]: procedures = 54, calls = 152, calls flagged for inlining = 24, calls inlined = 21, statements flattened = 249 [2021-11-23 03:15:29,554 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:15:29,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:15:29,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:15:29,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:15:29,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:29" (1/1) ... [2021-11-23 03:15:29,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:29" (1/1) ... [2021-11-23 03:15:29,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:29" (1/1) ... [2021-11-23 03:15:29,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:29" (1/1) ... [2021-11-23 03:15:29,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:29" (1/1) ... [2021-11-23 03:15:29,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:29" (1/1) ... [2021-11-23 03:15:29,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:29" (1/1) ... [2021-11-23 03:15:29,598 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:15:29,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:15:29,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:15:29,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:15:29,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:29" (1/1) ... [2021-11-23 03:15:29,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:15:29,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:29,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:15:29,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:15:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:15:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2021-11-23 03:15:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2021-11-23 03:15:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 03:15:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 03:15:29,702 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 03:15:29,702 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 03:15:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2021-11-23 03:15:29,703 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2021-11-23 03:15:29,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:15:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2021-11-23 03:15:29,704 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2021-11-23 03:15:29,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:15:29,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:15:29,818 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:15:29,820 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:15:30,233 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:15:30,316 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:15:30,316 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:15:30,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:15:30 BoogieIcfgContainer [2021-11-23 03:15:30,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:15:30,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:15:30,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:15:30,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:15:30,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:15:28" (1/3) ... [2021-11-23 03:15:30,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6ac80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:15:30, skipping insertion in model container [2021-11-23 03:15:30,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:15:29" (2/3) ... [2021-11-23 03:15:30,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6ac80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:15:30, skipping insertion in model container [2021-11-23 03:15:30,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:15:30" (3/3) ... [2021-11-23 03:15:30,328 INFO L111 eAbstractionObserver]: Analyzing ICFG minepump_spec4_product42.cil.c [2021-11-23 03:15:30,334 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:15:30,335 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:15:30,386 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:15:30,393 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 [2021-11-23 03:15:30,394 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:15:30,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 35 states have internal predecessors, (42), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-23 03:15:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:15:30,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:30,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:30,420 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:15:30,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:30,426 INFO L85 PathProgramCache]: Analyzing trace with hash -128954924, now seen corresponding path program 1 times [2021-11-23 03:15:30,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:30,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292882830] [2021-11-23 03:15:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:30,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:30,712 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292882830] [2021-11-23 03:15:30,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292882830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:15:30,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:15:30,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:15:30,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180316010] [2021-11-23 03:15:30,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:15:30,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:15:30,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:15:30,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:15:30,754 INFO L87 Difference]: Start difference. First operand has 44 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 35 states have internal predecessors, (42), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:30,822 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2021-11-23 03:15:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:15:30,825 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 03:15:30,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:30,835 INFO L225 Difference]: With dead ends: 86 [2021-11-23 03:15:30,835 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 03:15:30,839 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 [2021-11-23 03:15:30,843 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:30,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:15:30,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 03:15:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-23 03:15:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 31 states have internal predecessors, (34), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 03:15:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-11-23 03:15:30,888 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 12 [2021-11-23 03:15:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:30,889 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-11-23 03:15:30,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:30,889 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-11-23 03:15:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 03:15:30,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:30,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:30,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:15:30,892 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:15:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:30,893 INFO L85 PathProgramCache]: Analyzing trace with hash 343981551, now seen corresponding path program 1 times [2021-11-23 03:15:30,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:30,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199146333] [2021-11-23 03:15:30,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:30,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:30,978 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:30,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199146333] [2021-11-23 03:15:30,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199146333] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:15:30,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:15:30,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:15:30,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912572749] [2021-11-23 03:15:30,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:15:30,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:15:30,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:15:30,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:15:30,982 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:31,026 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2021-11-23 03:15:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:15:31,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 03:15:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:31,030 INFO L225 Difference]: With dead ends: 55 [2021-11-23 03:15:31,032 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 03:15:31,033 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 [2021-11-23 03:15:31,035 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:31,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:15:31,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 03:15:31,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 03:15:31,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 26 states have internal predecessors, (28), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-23 03:15:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-23 03:15:31,056 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 13 [2021-11-23 03:15:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:31,057 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-23 03:15:31,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-23 03:15:31,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:15:31,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:31,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:31,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:15:31,062 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:15:31,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:31,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1204722222, now seen corresponding path program 1 times [2021-11-23 03:15:31,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:31,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635337077] [2021-11-23 03:15:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:31,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:31,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:31,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635337077] [2021-11-23 03:15:31,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635337077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:15:31,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:15:31,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:15:31,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019262416] [2021-11-23 03:15:31,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:15:31,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:15:31,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:31,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:15:31,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:15:31,306 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:31,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:31,501 INFO L93 Difference]: Finished difference Result 105 states and 132 transitions. [2021-11-23 03:15:31,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:15:31,502 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 03:15:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:31,508 INFO L225 Difference]: With dead ends: 105 [2021-11-23 03:15:31,509 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 03:15:31,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:15:31,516 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 55 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:31,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 124 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:15:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 03:15:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2021-11-23 03:15:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 50 states have internal predecessors, (53), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-23 03:15:31,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-11-23 03:15:31,545 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 15 [2021-11-23 03:15:31,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:31,546 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-11-23 03:15:31,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:15:31,546 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-11-23 03:15:31,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 03:15:31,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:31,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:31,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:15:31,550 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:15:31,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:31,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1499205992, now seen corresponding path program 1 times [2021-11-23 03:15:31,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:31,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178084043] [2021-11-23 03:15:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:31,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:31,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:31,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178084043] [2021-11-23 03:15:31,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178084043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:15:31,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:15:31,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:15:31,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89848562] [2021-11-23 03:15:31,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:15:31,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:15:31,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:31,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:15:31,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:15:31,718 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:15:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:31,771 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2021-11-23 03:15:31,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:15:31,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-11-23 03:15:31,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:31,773 INFO L225 Difference]: With dead ends: 120 [2021-11-23 03:15:31,773 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 03:15:31,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:15:31,776 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:31,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:15:31,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 03:15:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-23 03:15:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 50 states have internal predecessors, (51), 9 states have call successors, (9), 8 states have call predecessors, (9), 9 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-23 03:15:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-11-23 03:15:31,789 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 31 [2021-11-23 03:15:31,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:31,793 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-11-23 03:15:31,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:15:31,794 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-11-23 03:15:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 03:15:31,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:31,795 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:15:31,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:15:31,796 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:15:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:31,798 INFO L85 PathProgramCache]: Analyzing trace with hash 3414419, now seen corresponding path program 1 times [2021-11-23 03:15:31,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:31,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579053949] [2021-11-23 03:15:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:31,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:31,937 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:31,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579053949] [2021-11-23 03:15:31,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579053949] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:31,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912968325] [2021-11-23 03:15:31,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:31,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:31,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:31,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:31,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:15:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:32,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:15:32,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:15:32,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:15:32,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912968325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:32,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [990467800] [2021-11-23 03:15:32,815 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 03:15:32,815 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:15:32,820 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:15:32,825 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:15:32,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:15:38,638 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 46 for LOIs [2021-11-23 03:15:38,707 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:15:41,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [990467800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:15:41,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:41,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 6, 6] total 24 [2021-11-23 03:15:41,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814055646] [2021-11-23 03:15:41,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:15:41,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:15:41,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:41,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:15:41,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-11-23 03:15:41,641 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:15:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:15:49,648 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2021-11-23 03:15:49,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:15:49,649 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-11-23 03:15:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:15:49,651 INFO L225 Difference]: With dead ends: 120 [2021-11-23 03:15:49,652 INFO L226 Difference]: Without dead ends: 86 [2021-11-23 03:15:49,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2021-11-23 03:15:49,654 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:15:49,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 135 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:15:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-23 03:15:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-11-23 03:15:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.1929824561403508) internal successors, (68), 65 states have internal predecessors, (68), 11 states have call successors, (11), 10 states have call predecessors, (11), 11 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-23 03:15:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-11-23 03:15:49,678 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 34 [2021-11-23 03:15:49,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:15:49,679 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-11-23 03:15:49,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:15:49,679 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-11-23 03:15:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 03:15:49,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:15:49,681 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:15:49,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:15:49,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:49,893 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:15:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:15:49,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1622827093, now seen corresponding path program 1 times [2021-11-23 03:15:49,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:15:49,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865629346] [2021-11-23 03:15:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:49,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:15:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:50,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:15:50,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865629346] [2021-11-23 03:15:50,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865629346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:15:50,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491361063] [2021-11-23 03:15:50,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:15:50,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:15:50,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:15:50,056 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:15:50,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:15:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:15:50,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 03:15:50,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:15:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:50,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:15:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:15:50,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491361063] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:15:50,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1905130604] [2021-11-23 03:15:50,665 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 03:15:50,666 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:15:50,666 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:15:50,666 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:15:50,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:15:53,298 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 28 for LOIs [2021-11-23 03:15:53,412 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 42 for LOIs [2021-11-23 03:15:53,421 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:15:56,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1905130604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:15:56,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:15:56,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [12, 7, 6] total 33 [2021-11-23 03:15:56,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192750135] [2021-11-23 03:15:56,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:15:56,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:15:56,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:15:56,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:15:56,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 03:15:56,455 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:16:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:06,114 INFO L93 Difference]: Finished difference Result 196 states and 232 transitions. [2021-11-23 03:16:06,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 03:16:06,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-11-23 03:16:06,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:06,118 INFO L225 Difference]: With dead ends: 196 [2021-11-23 03:16:06,118 INFO L226 Difference]: Without dead ends: 167 [2021-11-23 03:16:06,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=357, Invalid=2093, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 03:16:06,121 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 91 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:06,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 169 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:16:06,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-23 03:16:06,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 140. [2021-11-23 03:16:06,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 102 states have (on average 1.2156862745098038) internal successors, (124), 114 states have internal predecessors, (124), 18 states have call successors, (18), 16 states have call predecessors, (18), 19 states have return successors, (21), 17 states have call predecessors, (21), 18 states have call successors, (21) [2021-11-23 03:16:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 163 transitions. [2021-11-23 03:16:06,162 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 163 transitions. Word has length 37 [2021-11-23 03:16:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:06,162 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 163 transitions. [2021-11-23 03:16:06,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:16:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 163 transitions. [2021-11-23 03:16:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 03:16:06,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:06,165 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:16:06,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 03:16:06,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:06,373 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:16:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:06,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1618159681, now seen corresponding path program 1 times [2021-11-23 03:16:06,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:06,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841097495] [2021-11-23 03:16:06,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:06,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:06,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:06,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841097495] [2021-11-23 03:16:06,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841097495] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:06,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114674355] [2021-11-23 03:16:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:06,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:06,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:06,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:06,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:16:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:06,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 03:16:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:06,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:16:07,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114674355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:07,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1955847782] [2021-11-23 03:16:07,198 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 03:16:07,198 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:16:07,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:16:07,198 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:16:07,199 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:16:11,968 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 47 for LOIs [2021-11-23 03:16:11,979 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 27 for LOIs [2021-11-23 03:16:12,090 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:16:14,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1955847782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:16:14,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:14,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [6, 10, 9] total 38 [2021-11-23 03:16:14,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909244669] [2021-11-23 03:16:14,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:16:14,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:16:14,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:16:14,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 03:16:14,926 INFO L87 Difference]: Start difference. First operand 140 states and 163 transitions. Second operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:16:25,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:25,642 INFO L93 Difference]: Finished difference Result 277 states and 341 transitions. [2021-11-23 03:16:25,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 03:16:25,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-11-23 03:16:25,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:25,646 INFO L225 Difference]: With dead ends: 277 [2021-11-23 03:16:25,647 INFO L226 Difference]: Without dead ends: 248 [2021-11-23 03:16:25,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=643, Invalid=2663, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 03:16:25,650 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 110 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:25,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 360 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 03:16:25,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-23 03:16:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 212. [2021-11-23 03:16:25,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 173 states have internal predecessors, (190), 27 states have call successors, (27), 23 states have call predecessors, (27), 29 states have return successors, (35), 26 states have call predecessors, (35), 27 states have call successors, (35) [2021-11-23 03:16:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2021-11-23 03:16:25,716 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 37 [2021-11-23 03:16:25,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:25,716 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2021-11-23 03:16:25,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:16:25,717 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2021-11-23 03:16:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 03:16:25,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:25,720 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:16:25,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:25,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 03:16:25,945 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:16:25,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:25,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1529281237, now seen corresponding path program 1 times [2021-11-23 03:16:25,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:25,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908295670] [2021-11-23 03:16:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:25,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:26,032 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:26,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908295670] [2021-11-23 03:16:26,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908295670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:26,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646595738] [2021-11-23 03:16:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:26,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:26,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:26,033 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:26,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:16:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:26,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:16:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:26,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:26,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:26,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646595738] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:26,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1078074696] [2021-11-23 03:16:26,550 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-23 03:16:26,550 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:16:26,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:16:26,551 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:16:26,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:16:28,801 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 27 for LOIs [2021-11-23 03:16:28,908 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 39 for LOIs [2021-11-23 03:16:28,915 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 24 for LOIs [2021-11-23 03:16:28,917 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:16:31,403 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3738#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (<= ~methaneLevelCritical~0 1) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~10#1|) (= 1 ~systemActive~0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~3#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~10#1|) (<= 0 ~methaneLevelCritical~0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~3#1| 0) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-23 03:16:31,403 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:16:31,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:31,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2021-11-23 03:16:31,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113012290] [2021-11-23 03:16:31,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:31,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 03:16:31,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:31,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 03:16:31,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 03:16:31,407 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand has 16 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 7 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-23 03:16:31,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:31,944 INFO L93 Difference]: Finished difference Result 513 states and 629 transitions. [2021-11-23 03:16:31,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 03:16:31,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 7 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 39 [2021-11-23 03:16:31,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:31,950 INFO L225 Difference]: With dead ends: 513 [2021-11-23 03:16:31,950 INFO L226 Difference]: Without dead ends: 432 [2021-11-23 03:16:31,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=241, Invalid=1651, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 03:16:31,953 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 422 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:31,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 104 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 03:16:31,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-23 03:16:32,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 424. [2021-11-23 03:16:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 309 states have (on average 1.2297734627831716) internal successors, (380), 341 states have internal predecessors, (380), 56 states have call successors, (56), 50 states have call predecessors, (56), 58 states have return successors, (75), 55 states have call predecessors, (75), 56 states have call successors, (75) [2021-11-23 03:16:32,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 511 transitions. [2021-11-23 03:16:32,044 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 511 transitions. Word has length 39 [2021-11-23 03:16:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:32,044 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 511 transitions. [2021-11-23 03:16:32,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 7 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-23 03:16:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 511 transitions. [2021-11-23 03:16:32,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 03:16:32,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:32,047 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:16:32,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:32,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:32,262 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:16:32,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:32,263 INFO L85 PathProgramCache]: Analyzing trace with hash 2028685845, now seen corresponding path program 1 times [2021-11-23 03:16:32,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:32,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549504056] [2021-11-23 03:16:32,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:32,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:32,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:32,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549504056] [2021-11-23 03:16:32,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549504056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:32,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844130187] [2021-11-23 03:16:32,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:32,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:32,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:32,538 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:32,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:16:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:32,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 03:16:32,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:16:32,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:16:33,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844130187] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:33,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702850023] [2021-11-23 03:16:33,239 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-23 03:16:33,239 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:16:33,240 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:16:33,240 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:16:33,240 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:16:37,633 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 42 for LOIs [2021-11-23 03:16:37,637 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2021-11-23 03:16:37,774 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 37 for LOIs [2021-11-23 03:16:37,777 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:16:40,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5568#(and (<= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483647) (<= 0 (+ |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 2147483648)) (= ~methaneLevelCritical~0 0) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (= ~head~0.offset 0) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~10#1|) (= 1 ~systemActive~0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~3#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~10#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~3#1| 0) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-23 03:16:40,921 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:16:40,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:40,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 11] total 29 [2021-11-23 03:16:40,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828284872] [2021-11-23 03:16:40,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:40,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 03:16:40,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:40,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 03:16:40,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 03:16:40,923 INFO L87 Difference]: Start difference. First operand 424 states and 511 transitions. Second operand has 29 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 8 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-23 03:16:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:44,213 INFO L93 Difference]: Finished difference Result 1262 states and 1657 transitions. [2021-11-23 03:16:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-23 03:16:44,214 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 8 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2021-11-23 03:16:44,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:44,224 INFO L225 Difference]: With dead ends: 1262 [2021-11-23 03:16:44,225 INFO L226 Difference]: Without dead ends: 1086 [2021-11-23 03:16:44,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2885 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1108, Invalid=7634, Unknown=0, NotChecked=0, Total=8742 [2021-11-23 03:16:44,232 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 637 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1509 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 1509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:44,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 745 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 1509 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 03:16:44,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-11-23 03:16:44,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 862. [2021-11-23 03:16:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 626 states have (on average 1.2396166134185302) internal successors, (776), 689 states have internal predecessors, (776), 124 states have call successors, (124), 97 states have call predecessors, (124), 111 states have return successors, (180), 115 states have call predecessors, (180), 124 states have call successors, (180) [2021-11-23 03:16:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1080 transitions. [2021-11-23 03:16:44,405 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1080 transitions. Word has length 39 [2021-11-23 03:16:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:44,407 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1080 transitions. [2021-11-23 03:16:44,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 8 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-23 03:16:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1080 transitions. [2021-11-23 03:16:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 03:16:44,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:44,410 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 03:16:44,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:44,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:44,629 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:16:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:44,630 INFO L85 PathProgramCache]: Analyzing trace with hash 263475621, now seen corresponding path program 1 times [2021-11-23 03:16:44,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:44,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957597046] [2021-11-23 03:16:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:44,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:16:44,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:16:44,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957597046] [2021-11-23 03:16:44,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957597046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:16:44,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412998630] [2021-11-23 03:16:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:44,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:16:44,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:16:44,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:16:44,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:16:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:16:44,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:16:44,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:16:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:16:45,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:16:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:16:45,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412998630] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:16:45,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2121597127] [2021-11-23 03:16:45,319 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2021-11-23 03:16:45,319 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:16:45,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:16:45,319 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:16:45,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:16:48,181 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 42 for LOIs [2021-11-23 03:16:48,438 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 43 for LOIs [2021-11-23 03:16:48,446 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 41 for LOIs [2021-11-23 03:16:48,451 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:16:52,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9399#(and (<= |timeShift_isHighWaterLevel_#res#1| 1) (<= 0 |timeShift_isHighWaterLevel_#res#1|) (<= |timeShift_isHighWaterLevel_~tmp~8#1| 1) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (<= |timeShift_isHighWaterSensorDry_#res#1| 1) (not (= |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1| 0)) (= |timeShift_getWaterLevel_~retValue_acc~1#1| ~waterLevel~0) (<= |timeShift_isHighWaterLevel_~retValue_acc~11#1| 1) (= ~head~0.offset 0) (<= 1 ~systemActive~0) (<= |timeShift_isHighWaterLevel_~tmp___0~2#1| 1) (<= 0 |timeShift_isHighWaterLevel_~tmp~8#1|) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~10#1|) (<= 0 |timeShift_isHighWaterSensorDry_#res#1|) (<= |#NULL.offset| 0) (= |timeShift_getWaterLevel_~retValue_acc~1#1| |timeShift_getWaterLevel_#res#1|) (<= |timeShift_isHighWaterSensorDry_~retValue_acc~2#1| 1) (<= |old(~pumpRunning~0)| 0) (<= 0 |timeShift_processEnvironment_~tmp~6#1|) (<= 0 ~head~0.base) (<= 0 |timeShift_isHighWaterLevel_~retValue_acc~11#1|) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~3#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~10#1|) (<= 0 ~methaneLevelCritical~0) (<= 0 |timeShift_isHighWaterLevel_~tmp___0~2#1|) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification4_spec__1_~tmp___0~0#1|) (<= 0 ~pumpRunning~0) (<= ~head~0.base 0) (= |timeShift___utac_acc__Specification4_spec__1_~tmp~3#1| 0) (<= 0 |timeShift_isHighWaterSensorDry_~retValue_acc~2#1|) (<= 0 |#NULL.offset|) (<= |timeShift_processEnvironment_~tmp~6#1| 1) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2021-11-23 03:16:52,056 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:16:52,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:16:52,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 7] total 18 [2021-11-23 03:16:52,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073135801] [2021-11-23 03:16:52,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:16:52,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:16:52,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:16:52,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:16:52,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 03:16:52,059 INFO L87 Difference]: Start difference. First operand 862 states and 1080 transitions. Second operand has 18 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 4 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-23 03:16:53,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:16:53,282 INFO L93 Difference]: Finished difference Result 1903 states and 2505 transitions. [2021-11-23 03:16:53,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 03:16:53,283 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 4 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 40 [2021-11-23 03:16:53,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:16:53,296 INFO L225 Difference]: With dead ends: 1903 [2021-11-23 03:16:53,296 INFO L226 Difference]: Without dead ends: 1209 [2021-11-23 03:16:53,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=542, Invalid=2998, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 03:16:53,303 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 299 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:16:53,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 158 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:16:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-11-23 03:16:53,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 933. [2021-11-23 03:16:53,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 671 states have (on average 1.2086438152011922) internal successors, (811), 741 states have internal predecessors, (811), 138 states have call successors, (138), 111 states have call predecessors, (138), 123 states have return successors, (191), 129 states have call predecessors, (191), 138 states have call successors, (191) [2021-11-23 03:16:53,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1140 transitions. [2021-11-23 03:16:53,483 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1140 transitions. Word has length 40 [2021-11-23 03:16:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:16:53,483 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 1140 transitions. [2021-11-23 03:16:53,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.235294117647059) internal successors, (72), 17 states have internal predecessors, (72), 4 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-23 03:16:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1140 transitions. [2021-11-23 03:16:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 03:16:53,487 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:16:53,487 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:53,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:16:53,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 03:16:53,701 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:16:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:16:53,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1166060737, now seen corresponding path program 2 times [2021-11-23 03:16:53,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:16:53,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290063380] [2021-11-23 03:16:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:16:53,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:16:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:16:53,728 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:16:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:16:53,801 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:16:53,801 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:16:53,802 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-23 03:16:53,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:16:53,808 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:16:53,812 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:16:53,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:16:53 BoogieIcfgContainer [2021-11-23 03:16:53,880 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:16:53,881 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:16:53,881 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:16:53,881 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:16:53,882 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:15:30" (3/4) ... [2021-11-23 03:16:53,883 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 03:16:53,983 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:16:53,988 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:16:53,989 INFO L158 Benchmark]: Toolchain (without parser) took 85070.21ms. Allocated memory was 90.2MB in the beginning and 488.6MB in the end (delta: 398.5MB). Free memory was 56.7MB in the beginning and 184.6MB in the end (delta: -127.9MB). Peak memory consumption was 269.7MB. Max. memory is 16.1GB. [2021-11-23 03:16:53,989 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 90.2MB. Free memory is still 42.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:16:53,990 INFO L158 Benchmark]: CACSL2BoogieTranslator took 571.66ms. Allocated memory is still 90.2MB. Free memory was 56.6MB in the beginning and 58.3MB in the end (delta: -1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:16:53,990 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.81ms. Allocated memory is still 90.2MB. Free memory was 58.3MB in the beginning and 55.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:16:53,991 INFO L158 Benchmark]: Boogie Preprocessor took 42.91ms. Allocated memory is still 90.2MB. Free memory was 55.8MB in the beginning and 54.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:16:53,992 INFO L158 Benchmark]: RCFGBuilder took 720.33ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 54.2MB in the beginning and 78.6MB in the end (delta: -24.4MB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. [2021-11-23 03:16:53,992 INFO L158 Benchmark]: TraceAbstraction took 83559.45ms. Allocated memory was 109.1MB in the beginning and 488.6MB in the end (delta: 379.6MB). Free memory was 78.1MB in the beginning and 191.9MB in the end (delta: -113.9MB). Peak memory consumption was 265.6MB. Max. memory is 16.1GB. [2021-11-23 03:16:53,993 INFO L158 Benchmark]: Witness Printer took 107.45ms. Allocated memory is still 488.6MB. Free memory was 191.9MB in the beginning and 184.6MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:16:53,998 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 90.2MB. Free memory is still 42.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 571.66ms. Allocated memory is still 90.2MB. Free memory was 56.6MB in the beginning and 58.3MB in the end (delta: -1.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.81ms. Allocated memory is still 90.2MB. Free memory was 58.3MB in the beginning and 55.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.91ms. Allocated memory is still 90.2MB. Free memory was 55.8MB in the beginning and 54.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 720.33ms. Allocated memory was 90.2MB in the beginning and 109.1MB in the end (delta: 18.9MB). Free memory was 54.2MB in the beginning and 78.6MB in the end (delta: -24.4MB). Peak memory consumption was 19.4MB. Max. memory is 16.1GB. * TraceAbstraction took 83559.45ms. Allocated memory was 109.1MB in the beginning and 488.6MB in the end (delta: 379.6MB). Free memory was 78.1MB in the beginning and 191.9MB in the end (delta: -113.9MB). Peak memory consumption was 265.6MB. Max. memory is 16.1GB. * Witness Printer took 107.45ms. Allocated memory is still 488.6MB. Free memory was 191.9MB in the beginning and 184.6MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 934]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L57] int waterLevel = 1; [L58] int methaneLevelCritical = 0; [L320] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L583] int cleanupTimeShifts = 4; [L752] int pumpRunning = 0; [L753] int systemActive = 1; [L659] int retValue_acc ; [L660] int tmp ; [L664] FCALL select_helpers() [L665] FCALL select_features() [L666] CALL, EXPR valid_product() [L546] int retValue_acc ; [L549] retValue_acc = 1 [L550] return (retValue_acc); [L666] RET, EXPR valid_product() [L666] tmp = valid_product() [L668] COND TRUE \read(tmp) [L670] FCALL setup() [L671] CALL runTest() [L653] CALL test() [L684] int splverifierCounter ; [L685] int tmp ; [L686] int tmp___0 ; [L687] int tmp___1 ; [L688] int tmp___2 ; [L691] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L693] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L695] COND TRUE splverifierCounter < 4 [L701] tmp = __VERIFIER_nondet_int() [L703] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=-1, waterLevel=1] [L705] CALL waterRise() VAL [\old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L75] COND TRUE waterLevel < 2 [L76] waterLevel = waterLevel + 1 [L705] RET waterRise() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=-1, waterLevel=2] [L711] tmp___0 = __VERIFIER_nondet_int() [L713] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=-1, tmp___0=0, waterLevel=2] [L721] tmp___2 = __VERIFIER_nondet_int() [L723] COND TRUE \read(tmp___2) [L725] CALL startSystem() [L925] systemActive = 1 [L725] RET startSystem() [L738] CALL timeShift() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L759] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L766] COND TRUE \read(systemActive) [L768] CALL processEnvironment() [L788] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L791] COND TRUE ! pumpRunning [L793] CALL, EXPR isHighWaterLevel() [L903] int retValue_acc ; [L904] int tmp ; [L905] int tmp___0 ; [L909] CALL, EXPR isHighWaterSensorDry() [L137] int retValue_acc ; [L140] COND FALSE !(waterLevel < 2) [L144] retValue_acc = 0 [L145] return (retValue_acc); [L909] RET, EXPR isHighWaterSensorDry() [L909] tmp = isHighWaterSensorDry() [L911] COND FALSE !(\read(tmp)) [L914] tmp___0 = 1 [L916] retValue_acc = tmp___0 [L917] return (retValue_acc); [L793] RET, EXPR isHighWaterLevel() [L793] tmp = isHighWaterLevel() [L795] COND TRUE \read(tmp) [L797] CALL activatePump() [L822] int tmp ; [L826] CALL, EXPR isMethaneAlarm() [L847] int retValue_acc ; [L851] CALL, EXPR isMethaneLevelCritical() [L96] int retValue_acc ; [L99] retValue_acc = methaneLevelCritical [L100] return (retValue_acc); [L851] RET, EXPR isMethaneLevelCritical() [L851] retValue_acc = isMethaneLevelCritical() [L853] return (retValue_acc); [L826] RET, EXPR isMethaneAlarm() [L826] tmp = isMethaneAlarm() [L828] COND FALSE !(\read(tmp)) [L832] CALL activatePump__wrappee__highWaterSensor() [L816] pumpRunning = 1 [L832] RET activatePump__wrappee__highWaterSensor() [L797] RET activatePump() [L768] RET processEnvironment() [L774] CALL __utac_acc__Specification4_spec__1() [L558] int tmp ; [L559] int tmp___0 ; [L563] CALL, EXPR getWaterLevel() [L128] int retValue_acc ; [L131] retValue_acc = waterLevel [L132] return (retValue_acc); [L563] RET, EXPR getWaterLevel() [L563] tmp = getWaterLevel() [L565] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=2, waterLevel=2] [L774] RET __utac_acc__Specification4_spec__1() [L738] RET timeShift() VAL [__VERIFIER_nondet_int()=29, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=-1, tmp___0=0, tmp___1=29, tmp___2=-2, waterLevel=2] [L693] COND TRUE 1 VAL [__VERIFIER_nondet_int()=29, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=-1, tmp___0=0, tmp___1=29, tmp___2=-2, waterLevel=2] [L695] COND TRUE splverifierCounter < 4 [L701] tmp = __VERIFIER_nondet_int() [L703] COND FALSE !(\read(tmp)) VAL [__VERIFIER_nondet_int()=29, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=29, tmp___2=-2, waterLevel=2] [L711] tmp___0 = __VERIFIER_nondet_int() [L713] COND FALSE !(\read(tmp___0)) VAL [__VERIFIER_nondet_int()=29, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=29, tmp___2=-2, waterLevel=2] [L721] tmp___2 = __VERIFIER_nondet_int() [L723] COND FALSE !(\read(tmp___2)) [L729] tmp___1 = __VERIFIER_nondet_int() [L731] COND TRUE \read(tmp___1) VAL [__VERIFIER_nondet_int()=29, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=29, tmp___2=0, waterLevel=2] [L738] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L759] COND TRUE \read(pumpRunning) [L761] CALL lowerWaterLevel() [L63] COND TRUE waterLevel > 0 [L64] waterLevel = waterLevel - 1 [L761] RET lowerWaterLevel() [L766] COND TRUE \read(systemActive) [L768] CALL processEnvironment() [L788] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L791] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L806] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L768] RET processEnvironment() [L774] CALL __utac_acc__Specification4_spec__1() [L558] int tmp ; [L559] int tmp___0 ; [L563] CALL, EXPR getWaterLevel() [L128] int retValue_acc ; [L131] retValue_acc = waterLevel [L132] return (retValue_acc); [L563] RET, EXPR getWaterLevel() [L563] tmp = getWaterLevel() [L565] COND FALSE !(tmp == 0) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=1, waterLevel=1] [L774] RET __utac_acc__Specification4_spec__1() [L738] RET timeShift() VAL [__VERIFIER_nondet_int()=29, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=29, tmp___2=0, waterLevel=1] [L693] COND TRUE 1 VAL [__VERIFIER_nondet_int()=29, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=29, tmp___2=0, waterLevel=1] [L695] COND TRUE splverifierCounter < 4 [L701] tmp = __VERIFIER_nondet_int() [L703] COND FALSE !(\read(tmp)) VAL [__VERIFIER_nondet_int()=29, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=29, tmp___2=0, waterLevel=1] [L711] tmp___0 = __VERIFIER_nondet_int() [L713] COND FALSE !(\read(tmp___0)) VAL [__VERIFIER_nondet_int()=29, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=29, tmp___2=0, waterLevel=1] [L721] tmp___2 = __VERIFIER_nondet_int() [L723] COND TRUE \read(tmp___2) [L725] CALL startSystem() [L925] systemActive = 1 [L725] RET startSystem() [L738] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=1] [L759] COND TRUE \read(pumpRunning) [L761] CALL lowerWaterLevel() [L63] COND TRUE waterLevel > 0 [L64] waterLevel = waterLevel - 1 [L761] RET lowerWaterLevel() [L766] COND TRUE \read(systemActive) [L768] CALL processEnvironment() [L788] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L791] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L806] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] [L768] RET processEnvironment() [L774] CALL __utac_acc__Specification4_spec__1() [L558] int tmp ; [L559] int tmp___0 ; [L563] CALL, EXPR getWaterLevel() [L128] int retValue_acc ; [L131] retValue_acc = waterLevel [L132] return (retValue_acc); [L563] RET, EXPR getWaterLevel() [L563] tmp = getWaterLevel() [L565] COND TRUE tmp == 0 [L567] CALL, EXPR isPumpRunning() [L858] int retValue_acc ; [L861] retValue_acc = pumpRunning [L862] return (retValue_acc); [L567] RET, EXPR isPumpRunning() [L567] tmp___0 = isPumpRunning() [L569] COND TRUE \read(tmp___0) [L571] CALL __automaton_fail() [L934] reach_error() VAL [\old(pumpRunning)=1, \old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 83.4s, OverallIterations: 11, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 34.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1703 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1684 mSDsluCounter, 1914 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1883 mSDsCounter, 1141 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4140 IncrementalHoareTripleChecker+Invalid, 5281 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1141 mSolverCounterUnsat, 365 mSDtfsCounter, 4140 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 886 GetRequests, 529 SyntacticMatches, 22 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6406 ImplicationChecksByTransitivity, 47.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=933occurred in iteration=10, InterpolantAutomatonStates: 177, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 10 MinimizatonAttempts, 592 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 580 NumberOfCodeBlocks, 580 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 727 ConstructedInterpolants, 0 QuantifiedInterpolants, 3493 SizeOfPredicates, 57 NumberOfNonLiveVariables, 2327 ConjunctsInSsa, 146 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 121/257 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 13.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 8, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 75, DAG_INTERPRETER_EARLY_EXITS: 3, TOOLS_POST_APPLICATIONS: 126, TOOLS_POST_TIME: 5.2s, TOOLS_POST_CALL_APPLICATIONS: 37, TOOLS_POST_CALL_TIME: 4.2s, TOOLS_POST_RETURN_APPLICATIONS: 32, TOOLS_POST_RETURN_TIME: 2.8s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 195, TOOLS_QUANTIFIERELIM_TIME: 12.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.7s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 253, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 34, DOMAIN_JOIN_TIME: 0.8s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 3, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.1s, DOMAIN_ISBOTTOM_APPLICATIONS: 75, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME: 9.5s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 9.5s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 32, CALL_SUMMARIZER_CACHE_MISSES: 5, CALL_SUMMARIZER_OVERALL_TIME: 0.3s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.3s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 814, DAG_COMPRESSION_RETAINED_NODES: 226, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 03:16:54,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19985a72-63f1-48cc-9ebd-cf298c95ecb4/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE