./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7 --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 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:15:33,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:15:33,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:15:33,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:15:33,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:15:33,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:15:33,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:15:33,280 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:15:33,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:15:33,284 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:15:33,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:15:33,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:15:33,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:15:33,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:15:33,292 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:15:33,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:15:33,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:15:33,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:15:33,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:15:33,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:15:33,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:15:33,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:15:33,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:15:33,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:15:33,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:15:33,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:15:33,316 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:15:33,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:15:33,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:15:33,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:15:33,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:15:33,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:15:33,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:15:33,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:15:33,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:15:33,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:15:33,327 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:15:33,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:15:33,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:15:33,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:15:33,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:15:33,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:15:33,364 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:15:33,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:15:33,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:15:33,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:15:33,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:15:33,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:15:33,367 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:15:33,367 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:15:33,367 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:15:33,368 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:15:33,368 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:15:33,368 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:15:33,369 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:15:33,369 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:15:33,369 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:15:33,370 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:15:33,370 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:15:33,370 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:15:33,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:15:33,372 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:15:33,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:15:33,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:15:33,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:15:33,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:15:33,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:15:33,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:15:33,374 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:15:33,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:15:33,375 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:15:33,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:15:33,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:15:33,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:15:33,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:15:33,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:15:33,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:15:33,377 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:15:33,377 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:15:33,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:15:33,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:15:33,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:15:33,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:15:33,378 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_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2021-11-25 20:15:33,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:15:33,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:15:33,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:15:33,721 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:15:33,722 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:15:33,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-25 20:15:33,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/data/e59e8a372/a5388c8461ad4c94bd0c870af88fe62b/FLAG14106d624 [2021-11-25 20:15:34,623 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:15:34,623 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-25 20:15:34,651 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/data/e59e8a372/a5388c8461ad4c94bd0c870af88fe62b/FLAG14106d624 [2021-11-25 20:15:34,749 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/data/e59e8a372/a5388c8461ad4c94bd0c870af88fe62b [2021-11-25 20:15:34,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:15:34,753 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:15:34,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:15:34,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:15:34,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:15:34,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:15:34" (1/1) ... [2021-11-25 20:15:34,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d744aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:34, skipping insertion in model container [2021-11-25 20:15:34,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:15:34" (1/1) ... [2021-11-25 20:15:34,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:15:34,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:15:35,071 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_8ad8d1d8-446b-46de-9cc6-348902f918f1/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-25 20:15:35,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:15:35,405 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:15:35,422 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_8ad8d1d8-446b-46de-9cc6-348902f918f1/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-25 20:15:35,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:15:35,641 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:15:35,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:35 WrapperNode [2021-11-25 20:15:35,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:15:35,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:15:35,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:15:35,643 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:15:35,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:35" (1/1) ... [2021-11-25 20:15:35,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:35" (1/1) ... [2021-11-25 20:15:35,767 INFO L137 Inliner]: procedures = 92, calls = 335, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 1095 [2021-11-25 20:15:35,768 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:15:35,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:15:35,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:15:35,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:15:35,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:35" (1/1) ... [2021-11-25 20:15:35,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:35" (1/1) ... [2021-11-25 20:15:35,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:35" (1/1) ... [2021-11-25 20:15:35,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:35" (1/1) ... [2021-11-25 20:15:35,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:35" (1/1) ... [2021-11-25 20:15:35,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:35" (1/1) ... [2021-11-25 20:15:35,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:35" (1/1) ... [2021-11-25 20:15:35,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:15:35,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:15:35,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:15:35,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:15:35,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:35" (1/1) ... [2021-11-25 20:15:35,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:15:35,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:35,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:15:35,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:15:35,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:15:35,955 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 20:15:35,955 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 20:15:35,956 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 20:15:35,956 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 20:15:35,956 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 20:15:35,956 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 20:15:35,956 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 20:15:35,957 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 20:15:35,957 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 20:15:35,957 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 20:15:35,957 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 20:15:35,957 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 20:15:35,958 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 20:15:35,958 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 20:15:35,958 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:15:35,958 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:15:35,958 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:15:35,959 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:15:35,959 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 20:15:35,959 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 20:15:35,959 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 20:15:35,959 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 20:15:35,960 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 20:15:35,960 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 20:15:35,960 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 20:15:35,960 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 20:15:35,960 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 20:15:35,961 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 20:15:35,961 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-25 20:15:35,961 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-25 20:15:35,961 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 20:15:35,962 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 20:15:35,962 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 20:15:35,962 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 20:15:35,962 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 20:15:35,962 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 20:15:35,962 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 20:15:35,963 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 20:15:35,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:15:35,963 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 20:15:35,963 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 20:15:35,963 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 20:15:35,964 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 20:15:35,964 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 20:15:35,964 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 20:15:35,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:15:35,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:15:35,965 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 20:15:35,965 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 20:15:36,143 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:15:36,146 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:15:37,291 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:15:37,936 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:15:37,936 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:15:37,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:15:37 BoogieIcfgContainer [2021-11-25 20:15:37,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:15:37,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:15:37,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:15:37,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:15:37,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:15:34" (1/3) ... [2021-11-25 20:15:37,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d55efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:15:37, skipping insertion in model container [2021-11-25 20:15:37,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:15:35" (2/3) ... [2021-11-25 20:15:37,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25d55efb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:15:37, skipping insertion in model container [2021-11-25 20:15:37,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:15:37" (3/3) ... [2021-11-25 20:15:37,952 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2021-11-25 20:15:37,958 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:15:37,959 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:15:38,031 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:15:38,041 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 [2021-11-25 20:15:38,041 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:15:38,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-25 20:15:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 20:15:38,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:38,123 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:38,124 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:38,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1884041600, now seen corresponding path program 1 times [2021-11-25 20:15:38,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:38,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836208275] [2021-11-25 20:15:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:38,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:15:38,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:38,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836208275] [2021-11-25 20:15:38,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836208275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:15:38,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:15:38,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:15:38,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011524859] [2021-11-25 20:15:38,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:15:38,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:15:38,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:38,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:15:38,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:15:38,781 INFO L87 Difference]: Start difference. First operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 20:15:39,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:39,728 INFO L93 Difference]: Finished difference Result 1037 states and 1657 transitions. [2021-11-25 20:15:39,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:15:39,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2021-11-25 20:15:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:39,752 INFO L225 Difference]: With dead ends: 1037 [2021-11-25 20:15:39,753 INFO L226 Difference]: Without dead ends: 685 [2021-11-25 20:15:39,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:15:39,768 INFO L933 BasicCegarLoop]: 662 mSDtfsCounter, 530 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:39,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 2306 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:15:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-11-25 20:15:39,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 679. [2021-11-25 20:15:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 455 states have (on average 1.5604395604395604) internal successors, (710), 484 states have internal predecessors, (710), 180 states have call successors, (180), 45 states have call predecessors, (180), 43 states have return successors, (186), 174 states have call predecessors, (186), 178 states have call successors, (186) [2021-11-25 20:15:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2021-11-25 20:15:39,890 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 73 [2021-11-25 20:15:39,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:39,891 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2021-11-25 20:15:39,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-25 20:15:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2021-11-25 20:15:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 20:15:39,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:39,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:39,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:15:39,899 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:39,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:39,899 INFO L85 PathProgramCache]: Analyzing trace with hash 526041047, now seen corresponding path program 1 times [2021-11-25 20:15:39,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:39,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801052725] [2021-11-25 20:15:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:39,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:15:40,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:40,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801052725] [2021-11-25 20:15:40,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801052725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:15:40,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:15:40,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:15:40,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261972293] [2021-11-25 20:15:40,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:15:40,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:15:40,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:40,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:15:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:15:40,154 INFO L87 Difference]: Start difference. First operand 679 states and 1076 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:15:40,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:40,920 INFO L93 Difference]: Finished difference Result 776 states and 1223 transitions. [2021-11-25 20:15:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:15:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2021-11-25 20:15:40,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:40,935 INFO L225 Difference]: With dead ends: 776 [2021-11-25 20:15:40,936 INFO L226 Difference]: Without dead ends: 774 [2021-11-25 20:15:40,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:15:40,944 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 637 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:40,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 1626 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:15:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-11-25 20:15:41,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 764. [2021-11-25 20:15:41,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 506 states have (on average 1.5276679841897234) internal successors, (773), 535 states have internal predecessors, (773), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2021-11-25 20:15:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1189 transitions. [2021-11-25 20:15:41,018 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1189 transitions. Word has length 77 [2021-11-25 20:15:41,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:41,019 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 1189 transitions. [2021-11-25 20:15:41,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-25 20:15:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1189 transitions. [2021-11-25 20:15:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 20:15:41,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:41,027 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:41,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:15:41,028 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:41,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1228260862, now seen corresponding path program 1 times [2021-11-25 20:15:41,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:41,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458766666] [2021-11-25 20:15:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:41,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-25 20:15:41,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:41,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458766666] [2021-11-25 20:15:41,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458766666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:15:41,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:15:41,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:15:41,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102962969] [2021-11-25 20:15:41,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:15:41,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:15:41,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:41,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:15:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:15:41,189 INFO L87 Difference]: Start difference. First operand 764 states and 1189 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:15:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:41,364 INFO L93 Difference]: Finished difference Result 1554 states and 2447 transitions. [2021-11-25 20:15:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:15:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2021-11-25 20:15:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:41,373 INFO L225 Difference]: With dead ends: 1554 [2021-11-25 20:15:41,373 INFO L226 Difference]: Without dead ends: 802 [2021-11-25 20:15:41,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:15:41,382 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 54 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:41,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1534 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:15:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-11-25 20:15:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 768. [2021-11-25 20:15:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 510 states have (on average 1.5235294117647058) internal successors, (777), 539 states have internal predecessors, (777), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2021-11-25 20:15:41,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1193 transitions. [2021-11-25 20:15:41,476 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1193 transitions. Word has length 108 [2021-11-25 20:15:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:41,477 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1193 transitions. [2021-11-25 20:15:41,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:15:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1193 transitions. [2021-11-25 20:15:41,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-25 20:15:41,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:41,482 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:41,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:15:41,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:41,483 INFO L85 PathProgramCache]: Analyzing trace with hash 782844242, now seen corresponding path program 1 times [2021-11-25 20:15:41,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:41,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864864991] [2021-11-25 20:15:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:41,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-25 20:15:41,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:41,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864864991] [2021-11-25 20:15:41,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864864991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:41,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329008314] [2021-11-25 20:15:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:41,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:41,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:41,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:41,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:15:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:41,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:15:41,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 20:15:42,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:15:42,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329008314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:15:42,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:15:42,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 20:15:42,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342346705] [2021-11-25 20:15:42,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:15:42,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:15:42,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:15:42,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:15:42,155 INFO L87 Difference]: Start difference. First operand 768 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:15:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:42,505 INFO L93 Difference]: Finished difference Result 1602 states and 2536 transitions. [2021-11-25 20:15:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:15:42,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2021-11-25 20:15:42,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:42,517 INFO L225 Difference]: With dead ends: 1602 [2021-11-25 20:15:42,523 INFO L226 Difference]: Without dead ends: 846 [2021-11-25 20:15:42,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:15:42,536 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 213 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:42,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1308 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:15:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-11-25 20:15:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 846. [2021-11-25 20:15:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 586 states have (on average 1.575085324232082) internal successors, (923), 615 states have internal predecessors, (923), 202 states have call successors, (202), 60 states have call predecessors, (202), 57 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2021-11-25 20:15:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1339 transitions. [2021-11-25 20:15:42,605 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1339 transitions. Word has length 111 [2021-11-25 20:15:42,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:42,605 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1339 transitions. [2021-11-25 20:15:42,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:15:42,606 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1339 transitions. [2021-11-25 20:15:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 20:15:42,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:42,612 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:42,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 20:15:42,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:42,828 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:42,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2008837937, now seen corresponding path program 1 times [2021-11-25 20:15:42,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:42,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876597796] [2021-11-25 20:15:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:42,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-25 20:15:42,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876597796] [2021-11-25 20:15:42,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876597796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:42,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128017402] [2021-11-25 20:15:42,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:42,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:42,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:42,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:42,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:15:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:43,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:15:43,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 20:15:43,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:15:43,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128017402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:15:43,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:15:43,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 20:15:43,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496561077] [2021-11-25 20:15:43,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:15:43,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:15:43,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:43,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:15:43,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:15:43,457 INFO L87 Difference]: Start difference. First operand 846 states and 1339 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:15:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:43,807 INFO L93 Difference]: Finished difference Result 1758 states and 2826 transitions. [2021-11-25 20:15:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:15:43,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 116 [2021-11-25 20:15:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:43,819 INFO L225 Difference]: With dead ends: 1758 [2021-11-25 20:15:43,819 INFO L226 Difference]: Without dead ends: 924 [2021-11-25 20:15:43,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:15:43,829 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 211 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:43,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1308 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:15:43,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-11-25 20:15:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2021-11-25 20:15:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 662 states have (on average 1.6148036253776434) internal successors, (1069), 691 states have internal predecessors, (1069), 202 states have call successors, (202), 62 states have call predecessors, (202), 59 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2021-11-25 20:15:43,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1485 transitions. [2021-11-25 20:15:43,883 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1485 transitions. Word has length 116 [2021-11-25 20:15:43,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:43,885 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1485 transitions. [2021-11-25 20:15:43,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:15:43,885 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1485 transitions. [2021-11-25 20:15:43,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-25 20:15:43,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:43,890 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:43,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:44,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:44,116 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:44,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1280945471, now seen corresponding path program 1 times [2021-11-25 20:15:44,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:44,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657566106] [2021-11-25 20:15:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:44,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-25 20:15:44,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:44,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657566106] [2021-11-25 20:15:44,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657566106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:44,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164714292] [2021-11-25 20:15:44,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:44,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:44,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:44,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:44,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:15:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:44,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:15:44,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 20:15:44,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:15:44,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164714292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:15:44,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:15:44,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 20:15:44,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298970106] [2021-11-25 20:15:44,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:15:44,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:15:44,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:44,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:15:44,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:15:44,730 INFO L87 Difference]: Start difference. First operand 924 states and 1485 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:15:44,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:44,999 INFO L93 Difference]: Finished difference Result 1914 states and 3116 transitions. [2021-11-25 20:15:45,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:15:45,000 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2021-11-25 20:15:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:45,009 INFO L225 Difference]: With dead ends: 1914 [2021-11-25 20:15:45,009 INFO L226 Difference]: Without dead ends: 1002 [2021-11-25 20:15:45,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:15:45,016 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 209 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:45,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1308 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:15:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-11-25 20:15:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2021-11-25 20:15:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 738 states have (on average 1.646341463414634) internal successors, (1215), 767 states have internal predecessors, (1215), 202 states have call successors, (202), 64 states have call predecessors, (202), 61 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2021-11-25 20:15:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1631 transitions. [2021-11-25 20:15:45,073 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1631 transitions. Word has length 120 [2021-11-25 20:15:45,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:45,074 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1631 transitions. [2021-11-25 20:15:45,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:15:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1631 transitions. [2021-11-25 20:15:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-25 20:15:45,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:45,079 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:45,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:45,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 20:15:45,292 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:45,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:45,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1320443278, now seen corresponding path program 1 times [2021-11-25 20:15:45,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:45,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140485614] [2021-11-25 20:15:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:45,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-25 20:15:45,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:45,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140485614] [2021-11-25 20:15:45,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140485614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:45,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036546390] [2021-11-25 20:15:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:45,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:45,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:45,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:45,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:15:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:45,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:15:45,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 20:15:45,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:15:45,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036546390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:15:45,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:15:45,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 20:15:45,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448703381] [2021-11-25 20:15:45,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:15:45,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:15:45,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:15:45,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:15:45,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:15:45,990 INFO L87 Difference]: Start difference. First operand 1002 states and 1631 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:15:46,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:46,276 INFO L93 Difference]: Finished difference Result 2070 states and 3406 transitions. [2021-11-25 20:15:46,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:15:46,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2021-11-25 20:15:46,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:46,286 INFO L225 Difference]: With dead ends: 2070 [2021-11-25 20:15:46,286 INFO L226 Difference]: Without dead ends: 1080 [2021-11-25 20:15:46,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:15:46,294 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 207 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:46,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1308 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:15:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-11-25 20:15:46,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2021-11-25 20:15:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 814 states have (on average 1.671990171990172) internal successors, (1361), 843 states have internal predecessors, (1361), 202 states have call successors, (202), 66 states have call predecessors, (202), 63 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2021-11-25 20:15:46,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1777 transitions. [2021-11-25 20:15:46,346 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1777 transitions. Word has length 123 [2021-11-25 20:15:46,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:46,347 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1777 transitions. [2021-11-25 20:15:46,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:15:46,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1777 transitions. [2021-11-25 20:15:46,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-25 20:15:46,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:46,352 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:15:46,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:46,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:46,568 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:46,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2027278208, now seen corresponding path program 1 times [2021-11-25 20:15:46,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:46,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267806731] [2021-11-25 20:15:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:46,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-25 20:15:46,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:46,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267806731] [2021-11-25 20:15:46,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267806731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:46,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629079258] [2021-11-25 20:15:46,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:46,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:46,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:46,676 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:46,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:15:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:46,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 20:15:46,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:48,215 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-25 20:15:48,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:16:31,777 WARN L227 SmtUtils]: Spent 40.69s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 20:16:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-25 20:16:34,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629079258] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:16:34,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1884295776] [2021-11-25 20:16:34,709 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2021-11-25 20:16:34,709 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:16:34,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:16:34,721 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:16:34,721 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:16:37,491 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 20:16:41,131 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2021-11-25 20:16:41,681 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2021-11-25 20:16:52,688 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 66 for LOIs [2021-11-25 20:16:52,698 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 100 for LOIs [2021-11-25 20:16:52,829 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 111 for LOIs [2021-11-25 20:16:53,483 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 437 for LOIs [2021-11-25 20:16:54,215 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 66 for LOIs [2021-11-25 20:16:54,234 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-25 20:16:54,372 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 82 for LOIs [2021-11-25 20:16:54,393 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:17:11,423 WARN L227 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:17:16,988 WARN L227 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:18:16,060 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25729#(and (<= 0 |timeShift_processWaitingOnFloor_#in~floorID#1|) (= |old(~floorButtons_2~0)| 0) (<= ~floorButtons_3~0 0) (= ~executiveFloor~0 4) (= |timeShift_processWaitingOnFloor_~tmp___2~2#1| 0) (= |old(~persons_1~0)| 0) (<= ~currentFloorID~0 0) (<= ~currentHeading~0 1) (= |old(~persons_5~0)| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= |timeShift_processWaitingOnFloor_~tmp___6~1#1| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (<= ~personOnFloor_5_1~0 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (= |old(~floorButtons_0~0)| 0) (<= ~weight~0 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= 0 ~floorButtons_2~0) (<= |timeShift_resetFloorButton_#in~floorID#1| 0) (= |timeShift_processWaitingOnFloor_~tmp___0~5#1| 0) (<= ~calls_0~0 0) (= ~head~0.offset 0) (<= 0 ~currentFloorID~0) (<= 1 |timeShift_~tmp___9~2#1|) (= |old(~weight~0)| 0) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 |timeShift_resetFloorButton_#in~floorID#1|) (= ~persons_4~0 0) (<= |timeShift_processWaitingOnFloor_#in~floorID#1| 0) (<= 0 ~floorButtons_3~0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 |timeShift_processWaitingOnFloor_~floorID#1|) (<= 0 |timeShift_resetFloorButton_~floorID#1|) (<= ~floorButtons_2~0 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 0) (= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |old(~persons_0~0)| 0) (<= 0 ~floorButtons_0~0) (= ~doorState~0 1) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (= |timeShift_processWaitingOnFloor_~tmp___10~0#1| 0) (<= 1 ~currentHeading~0) (<= 0 ~calls_0~0) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (= ~head~0.base 0) (<= 1 ~personOnFloor_5_1~0) (= |#NULL.offset| 0) (<= ~floorButtons_4~0 0) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= 1 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |old(~currentHeading~0)| 1) (= |timeShift_processWaitingOnFloor_~tmp___8~1#1| 0) (<= |timeShift_resetFloorButton_~floorID#1| 0) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 ~floorButtons_4~0) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= 0 ~weight~0) (<= ~floorButtons_1~0 0) (<= |timeShift_processWaitingOnFloor_~floorID#1| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= ~cleanupTimeShifts~0 12) (= |timeShift_processWaitingOnFloor_~tmp___4~1#1| 0) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2021-11-25 20:18:16,060 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:18:16,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:18:16,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 16] total 32 [2021-11-25 20:18:16,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812691090] [2021-11-25 20:18:16,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:18:16,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 20:18:16,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 20:18:16,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=7029, Unknown=0, NotChecked=0, Total=7832 [2021-11-25 20:18:16,066 INFO L87 Difference]: Start difference. First operand 1080 states and 1777 transitions. Second operand has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2021-11-25 20:18:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:28,458 INFO L93 Difference]: Finished difference Result 3455 states and 5745 transitions. [2021-11-25 20:18:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-25 20:18:28,459 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) Word has length 125 [2021-11-25 20:18:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:28,476 INFO L225 Difference]: With dead ends: 3455 [2021-11-25 20:18:28,476 INFO L226 Difference]: Without dead ends: 1904 [2021-11-25 20:18:28,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 293 SyntacticMatches, 15 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7438 ImplicationChecksByTransitivity, 84.7s TimeCoverageRelationStatistics Valid=1842, Invalid=17618, Unknown=0, NotChecked=0, Total=19460 [2021-11-25 20:18:28,497 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 5556 mSDsluCounter, 4158 mSDsCounter, 0 mSdLazyCounter, 14690 mSolverCounterSat, 3147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5601 SdHoareTripleChecker+Valid, 4524 SdHoareTripleChecker+Invalid, 17837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3147 IncrementalHoareTripleChecker+Valid, 14690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:28,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5601 Valid, 4524 Invalid, 17837 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3147 Valid, 14690 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2021-11-25 20:18:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-11-25 20:18:28,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1761. [2021-11-25 20:18:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1262 states have (on average 1.5736925515055467) internal successors, (1986), 1324 states have internal predecessors, (1986), 372 states have call successors, (372), 132 states have call predecessors, (372), 126 states have return successors, (414), 352 states have call predecessors, (414), 369 states have call successors, (414) [2021-11-25 20:18:28,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2772 transitions. [2021-11-25 20:18:28,667 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2772 transitions. Word has length 125 [2021-11-25 20:18:28,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:28,667 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 2772 transitions. [2021-11-25 20:18:28,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2021-11-25 20:18:28,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2772 transitions. [2021-11-25 20:18:28,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 20:18:28,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:28,676 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:28,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:28,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:28,904 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:28,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash -654703038, now seen corresponding path program 1 times [2021-11-25 20:18:28,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:28,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874184754] [2021-11-25 20:18:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:28,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-25 20:18:29,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:29,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874184754] [2021-11-25 20:18:29,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874184754] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:29,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913407479] [2021-11-25 20:18:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:29,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:29,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:29,040 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:29,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:18:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:29,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:18:29,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-25 20:18:29,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:18:29,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913407479] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:29,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:18:29,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-25 20:18:29,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399144467] [2021-11-25 20:18:29,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:29,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:18:29,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:29,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:18:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:18:29,639 INFO L87 Difference]: Start difference. First operand 1761 states and 2772 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 20:18:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:30,456 INFO L93 Difference]: Finished difference Result 3327 states and 5238 transitions. [2021-11-25 20:18:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:18:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 130 [2021-11-25 20:18:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:30,471 INFO L225 Difference]: With dead ends: 3327 [2021-11-25 20:18:30,471 INFO L226 Difference]: Without dead ends: 1579 [2021-11-25 20:18:30,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:18:30,485 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 340 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:30,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 1986 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:18:30,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-11-25 20:18:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1555. [2021-11-25 20:18:30,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1134 states have (on average 1.5864197530864197) internal successors, (1799), 1180 states have internal predecessors, (1799), 309 states have call successors, (309), 116 states have call predecessors, (309), 111 states have return successors, (338), 294 states have call predecessors, (338), 306 states have call successors, (338) [2021-11-25 20:18:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2446 transitions. [2021-11-25 20:18:30,587 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2446 transitions. Word has length 130 [2021-11-25 20:18:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:30,587 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 2446 transitions. [2021-11-25 20:18:30,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-25 20:18:30,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2446 transitions. [2021-11-25 20:18:30,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-25 20:18:30,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:30,599 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:30,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:30,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:30,814 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:30,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1376275609, now seen corresponding path program 1 times [2021-11-25 20:18:30,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:30,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114234706] [2021-11-25 20:18:30,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:30,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-25 20:18:31,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:31,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114234706] [2021-11-25 20:18:31,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114234706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:31,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075057602] [2021-11-25 20:18:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:31,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:31,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:31,052 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:31,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:18:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:31,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:18:31,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 93 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-25 20:18:32,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-25 20:18:32,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075057602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:32,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1970417629] [2021-11-25 20:18:32,645 INFO L159 IcfgInterpreter]: Started Sifa with 114 locations of interest [2021-11-25 20:18:32,645 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:18:32,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:18:32,647 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:18:32,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:18:39,247 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2021-11-25 20:18:48,890 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-25 20:18:48,978 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 50 for LOIs [2021-11-25 20:18:49,083 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 83 for LOIs [2021-11-25 20:18:49,390 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2021-11-25 20:18:49,455 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2021-11-25 20:18:49,466 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 90 for LOIs [2021-11-25 20:18:49,483 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-25 20:18:49,486 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 20:18:52,780 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2021-11-25 20:18:53,356 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-25 20:18:53,422 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-25 20:18:53,426 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-25 20:18:53,563 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:19:10,445 WARN L227 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:19:16,097 WARN L227 SmtUtils]: Spent 5.33s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:19:58,849 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41293#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 |#NULL.base|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= 0 ~head~0.offset) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 4 ~executiveFloor~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 12 ~cleanupTimeShifts~0) (<= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1| 2147483647) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|))' at error location [2021-11-25 20:19:58,850 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:19:58,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:19:58,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 30 [2021-11-25 20:19:58,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572382936] [2021-11-25 20:19:58,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:19:58,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-25 20:19:58,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:58,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-25 20:19:58,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=13373, Unknown=0, NotChecked=0, Total=14520 [2021-11-25 20:19:58,858 INFO L87 Difference]: Start difference. First operand 1555 states and 2446 transitions. Second operand has 30 states, 24 states have (on average 8.5) internal successors, (204), 26 states have internal predecessors, (204), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) [2021-11-25 20:20:13,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:13,015 INFO L93 Difference]: Finished difference Result 5077 states and 8200 transitions. [2021-11-25 20:20:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-25 20:20:13,016 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 8.5) internal successors, (204), 26 states have internal predecessors, (204), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) Word has length 242 [2021-11-25 20:20:13,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:13,043 INFO L225 Difference]: With dead ends: 5077 [2021-11-25 20:20:13,044 INFO L226 Difference]: Without dead ends: 3721 [2021-11-25 20:20:13,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 649 SyntacticMatches, 8 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12058 ImplicationChecksByTransitivity, 67.1s TimeCoverageRelationStatistics Valid=2220, Invalid=29642, Unknown=0, NotChecked=0, Total=31862 [2021-11-25 20:20:13,069 INFO L933 BasicCegarLoop]: 885 mSDtfsCounter, 7217 mSDsluCounter, 6038 mSDsCounter, 0 mSdLazyCounter, 21548 mSolverCounterSat, 4905 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7228 SdHoareTripleChecker+Valid, 6404 SdHoareTripleChecker+Invalid, 26453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4905 IncrementalHoareTripleChecker+Valid, 21548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:13,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7228 Valid, 6404 Invalid, 26453 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4905 Valid, 21548 Invalid, 0 Unknown, 0 Unchecked, 12.0s Time] [2021-11-25 20:20:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-11-25 20:20:13,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3444. [2021-11-25 20:20:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 2505 states have (on average 1.5497005988023953) internal successors, (3882), 2598 states have internal predecessors, (3882), 663 states have call successors, (663), 284 states have call predecessors, (663), 275 states have return successors, (780), 633 states have call predecessors, (780), 655 states have call successors, (780) [2021-11-25 20:20:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 5325 transitions. [2021-11-25 20:20:13,299 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 5325 transitions. Word has length 242 [2021-11-25 20:20:13,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:13,300 INFO L470 AbstractCegarLoop]: Abstraction has 3444 states and 5325 transitions. [2021-11-25 20:20:13,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 8.5) internal successors, (204), 26 states have internal predecessors, (204), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) [2021-11-25 20:20:13,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 5325 transitions. [2021-11-25 20:20:13,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-25 20:20:13,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:13,324 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:13,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:20:13,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:20:13,544 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:13,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:13,544 INFO L85 PathProgramCache]: Analyzing trace with hash -176587744, now seen corresponding path program 1 times [2021-11-25 20:20:13,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:13,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038625778] [2021-11-25 20:20:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:13,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-25 20:20:13,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:13,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038625778] [2021-11-25 20:20:13,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038625778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:20:13,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092194528] [2021-11-25 20:20:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:13,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:13,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:13,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:13,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:20:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:14,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:20:14,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 68 proven. 10 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-25 20:20:14,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:20:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-25 20:20:14,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092194528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:20:14,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1224975515] [2021-11-25 20:20:14,834 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2021-11-25 20:20:14,835 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:20:14,836 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:20:14,836 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:20:14,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:20:19,443 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2021-11-25 20:20:28,245 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-25 20:20:28,342 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 50 for LOIs [2021-11-25 20:20:28,432 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 83 for LOIs [2021-11-25 20:20:28,789 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2021-11-25 20:20:28,843 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2021-11-25 20:20:28,854 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 90 for LOIs [2021-11-25 20:20:28,870 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-25 20:20:28,873 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 20:20:32,179 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2021-11-25 20:20:32,692 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-25 20:20:32,740 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-25 20:20:32,744 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-25 20:20:32,881 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:20:49,570 WARN L227 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:20:55,176 WARN L227 SmtUtils]: Spent 5.34s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:21:36,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54208#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 (+ ~currentFloorID~0 2147483648)) (<= 0 |#NULL.base|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= 0 ~head~0.offset) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= ~currentFloorID~0 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 4 ~executiveFloor~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 12 ~cleanupTimeShifts~0) (<= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|))' at error location [2021-11-25 20:21:36,561 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:21:36,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:21:36,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2021-11-25 20:21:36,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227591375] [2021-11-25 20:21:36,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:21:36,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 20:21:36,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:36,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 20:21:36,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=12469, Unknown=0, NotChecked=0, Total=13572 [2021-11-25 20:21:36,565 INFO L87 Difference]: Start difference. First operand 3444 states and 5325 transitions. Second operand has 26 states, 20 states have (on average 10.25) internal successors, (205), 22 states have internal predecessors, (205), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2021-11-25 20:21:48,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:48,938 INFO L93 Difference]: Finished difference Result 9635 states and 15053 transitions. [2021-11-25 20:21:48,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-25 20:21:48,939 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 10.25) internal successors, (205), 22 states have internal predecessors, (205), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) Word has length 192 [2021-11-25 20:21:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:48,975 INFO L225 Difference]: With dead ends: 9635 [2021-11-25 20:21:48,975 INFO L226 Difference]: Without dead ends: 5236 [2021-11-25 20:21:49,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 503 SyntacticMatches, 8 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12512 ImplicationChecksByTransitivity, 65.3s TimeCoverageRelationStatistics Valid=2318, Invalid=28834, Unknown=0, NotChecked=0, Total=31152 [2021-11-25 20:21:49,011 INFO L933 BasicCegarLoop]: 910 mSDtfsCounter, 7474 mSDsluCounter, 4709 mSDsCounter, 0 mSdLazyCounter, 17663 mSolverCounterSat, 5855 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7495 SdHoareTripleChecker+Valid, 5209 SdHoareTripleChecker+Invalid, 23518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5855 IncrementalHoareTripleChecker+Valid, 17663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:49,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7495 Valid, 5209 Invalid, 23518 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5855 Valid, 17663 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2021-11-25 20:21:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2021-11-25 20:21:49,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 4837. [2021-11-25 20:21:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4837 states, 3498 states have (on average 1.4734133790737565) internal successors, (5154), 3584 states have internal predecessors, (5154), 907 states have call successors, (907), 440 states have call predecessors, (907), 431 states have return successors, (1103), 872 states have call predecessors, (1103), 896 states have call successors, (1103) [2021-11-25 20:21:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4837 states to 4837 states and 7164 transitions. [2021-11-25 20:21:49,395 INFO L78 Accepts]: Start accepts. Automaton has 4837 states and 7164 transitions. Word has length 192 [2021-11-25 20:21:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:49,395 INFO L470 AbstractCegarLoop]: Abstraction has 4837 states and 7164 transitions. [2021-11-25 20:21:49,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 10.25) internal successors, (205), 22 states have internal predecessors, (205), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2021-11-25 20:21:49,396 INFO L276 IsEmpty]: Start isEmpty. Operand 4837 states and 7164 transitions. [2021-11-25 20:21:49,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-11-25 20:21:49,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:49,441 INFO L514 BasicCegarLoop]: trace histogram [14, 12, 12, 10, 10, 10, 10, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:49,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:49,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 20:21:49,657 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:49,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1752383663, now seen corresponding path program 1 times [2021-11-25 20:21:49,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:49,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039164097] [2021-11-25 20:21:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:49,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 79 proven. 30 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2021-11-25 20:21:49,839 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:49,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039164097] [2021-11-25 20:21:49,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039164097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:49,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073220892] [2021-11-25 20:21:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:49,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:49,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:49,841 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:49,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:21:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:50,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 3127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:21:50,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2021-11-25 20:21:50,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:21:50,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073220892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:50,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:21:50,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-25 20:21:50,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537920933] [2021-11-25 20:21:50,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:50,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:50,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:50,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:50,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:50,835 INFO L87 Difference]: Start difference. First operand 4837 states and 7164 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-25 20:21:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:51,134 INFO L93 Difference]: Finished difference Result 8006 states and 11891 transitions. [2021-11-25 20:21:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:51,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 384 [2021-11-25 20:21:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:51,169 INFO L225 Difference]: With dead ends: 8006 [2021-11-25 20:21:51,169 INFO L226 Difference]: Without dead ends: 4747 [2021-11-25 20:21:51,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:51,185 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 402 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:51,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 977 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2021-11-25 20:21:51,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 4725. [2021-11-25 20:21:51,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4725 states, 3405 states have (on average 1.4625550660792952) internal successors, (4980), 3489 states have internal predecessors, (4980), 891 states have call successors, (891), 438 states have call predecessors, (891), 428 states have return successors, (1069), 857 states have call predecessors, (1069), 880 states have call successors, (1069) [2021-11-25 20:21:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4725 states to 4725 states and 6940 transitions. [2021-11-25 20:21:51,583 INFO L78 Accepts]: Start accepts. Automaton has 4725 states and 6940 transitions. Word has length 384 [2021-11-25 20:21:51,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:51,584 INFO L470 AbstractCegarLoop]: Abstraction has 4725 states and 6940 transitions. [2021-11-25 20:21:51,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-25 20:21:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4725 states and 6940 transitions. [2021-11-25 20:21:51,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-25 20:21:51,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:51,624 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:51,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:51,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:51,840 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:51,840 INFO L85 PathProgramCache]: Analyzing trace with hash 992066684, now seen corresponding path program 1 times [2021-11-25 20:21:51,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:51,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038809495] [2021-11-25 20:21:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:51,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2021-11-25 20:21:52,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:52,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038809495] [2021-11-25 20:21:52,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038809495] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:52,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:52,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:21:52,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555056502] [2021-11-25 20:21:52,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:52,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:21:52,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:52,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:21:52,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:21:52,040 INFO L87 Difference]: Start difference. First operand 4725 states and 6940 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-25 20:21:52,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:52,353 INFO L93 Difference]: Finished difference Result 9296 states and 13724 transitions. [2021-11-25 20:21:52,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:21:52,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) Word has length 316 [2021-11-25 20:21:52,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:52,381 INFO L225 Difference]: With dead ends: 9296 [2021-11-25 20:21:52,381 INFO L226 Difference]: Without dead ends: 4940 [2021-11-25 20:21:52,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:21:52,400 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 17 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:52,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 2577 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4940 states. [2021-11-25 20:21:52,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4940 to 4860. [2021-11-25 20:21:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 3503 states have (on average 1.4490436768484156) internal successors, (5076), 3611 states have internal predecessors, (5076), 889 states have call successors, (889), 438 states have call predecessors, (889), 467 states have return successors, (1119), 870 states have call predecessors, (1119), 878 states have call successors, (1119) [2021-11-25 20:21:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 7084 transitions. [2021-11-25 20:21:52,726 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 7084 transitions. Word has length 316 [2021-11-25 20:21:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:52,727 INFO L470 AbstractCegarLoop]: Abstraction has 4860 states and 7084 transitions. [2021-11-25 20:21:52,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-25 20:21:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 7084 transitions. [2021-11-25 20:21:52,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-25 20:21:52,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:52,782 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:52,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:21:52,783 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:52,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:52,784 INFO L85 PathProgramCache]: Analyzing trace with hash 368239106, now seen corresponding path program 1 times [2021-11-25 20:21:52,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:52,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181735542] [2021-11-25 20:21:52,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:52,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2021-11-25 20:21:53,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:53,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181735542] [2021-11-25 20:21:53,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181735542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:53,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047230707] [2021-11-25 20:21:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:53,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:53,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:53,024 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:53,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:21:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:53,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 2950 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:21:53,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 132 proven. 26 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2021-11-25 20:21:53,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:21:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2021-11-25 20:21:54,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047230707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:21:54,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1174519286] [2021-11-25 20:21:54,710 INFO L159 IcfgInterpreter]: Started Sifa with 124 locations of interest [2021-11-25 20:21:54,710 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:21:54,713 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:21:54,713 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:21:54,713 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:22:02,044 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2021-11-25 20:22:02,487 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2021-11-25 20:22:06,597 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-25 20:22:06,684 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 28 for LOIs [2021-11-25 20:22:06,723 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 83 for LOIs [2021-11-25 20:22:06,971 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2021-11-25 20:22:07,025 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2021-11-25 20:22:07,044 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 90 for LOIs [2021-11-25 20:22:07,061 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-25 20:22:07,065 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 20:22:10,276 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-25 20:22:10,350 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-25 20:22:10,354 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2021-11-25 20:22:12,536 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2021-11-25 20:22:16,517 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2021-11-25 20:22:16,897 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:22:30,962 WARN L227 SmtUtils]: Spent 7.34s on a formula simplification. DAG size of input: 631 DAG size of output: 508 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:22:39,538 WARN L227 SmtUtils]: Spent 7.69s on a formula simplification. DAG size of input: 671 DAG size of output: 522 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:22:45,216 WARN L227 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:22:50,884 WARN L227 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:22:58,833 WARN L227 SmtUtils]: Spent 6.65s on a formula simplification. DAG size of input: 778 DAG size of output: 644 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:23:05,323 WARN L227 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 777 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:24:02,408 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '115156#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 (+ ~currentFloorID~0 2147483648)) (<= 0 |#NULL.base|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= 0 ~head~0.offset) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= ~currentFloorID~0 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 4 ~executiveFloor~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 12 ~cleanupTimeShifts~0) (<= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|))' at error location [2021-11-25 20:24:02,408 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:24:02,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:24:02,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-11-25 20:24:02,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700262430] [2021-11-25 20:24:02,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:24:02,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 20:24:02,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:24:02,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 20:24:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=13354, Unknown=0, NotChecked=0, Total=14520 [2021-11-25 20:24:02,412 INFO L87 Difference]: Start difference. First operand 4860 states and 7084 transitions. Second operand has 25 states, 19 states have (on average 10.789473684210526) internal successors, (205), 22 states have internal predecessors, (205), 11 states have call successors, (76), 6 states have call predecessors, (76), 9 states have return successors, (71), 11 states have call predecessors, (71), 11 states have call successors, (71) [2021-11-25 20:24:08,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:24:08,083 INFO L93 Difference]: Finished difference Result 8655 states and 12669 transitions. [2021-11-25 20:24:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 20:24:08,084 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 10.789473684210526) internal successors, (205), 22 states have internal predecessors, (205), 11 states have call successors, (76), 6 states have call predecessors, (76), 9 states have return successors, (71), 11 states have call predecessors, (71), 11 states have call successors, (71) Word has length 317 [2021-11-25 20:24:08,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:24:08,108 INFO L225 Difference]: With dead ends: 8655 [2021-11-25 20:24:08,109 INFO L226 Difference]: Without dead ends: 5613 [2021-11-25 20:24:08,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 817 SyntacticMatches, 38 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9029 ImplicationChecksByTransitivity, 106.7s TimeCoverageRelationStatistics Valid=1504, Invalid=18518, Unknown=0, NotChecked=0, Total=20022 [2021-11-25 20:24:08,125 INFO L933 BasicCegarLoop]: 1160 mSDtfsCounter, 2343 mSDsluCounter, 12200 mSDsCounter, 0 mSdLazyCounter, 8232 mSolverCounterSat, 1699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2363 SdHoareTripleChecker+Valid, 12295 SdHoareTripleChecker+Invalid, 9931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1699 IncrementalHoareTripleChecker+Valid, 8232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:24:08,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2363 Valid, 12295 Invalid, 9931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1699 Valid, 8232 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-25 20:24:08,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5613 states. [2021-11-25 20:24:08,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5613 to 5489. [2021-11-25 20:24:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5489 states, 3966 states have (on average 1.4147755925365608) internal successors, (5611), 4084 states have internal predecessors, (5611), 985 states have call successors, (985), 498 states have call predecessors, (985), 537 states have return successors, (1307), 966 states have call predecessors, (1307), 974 states have call successors, (1307) [2021-11-25 20:24:08,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 7903 transitions. [2021-11-25 20:24:08,515 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 7903 transitions. Word has length 317 [2021-11-25 20:24:08,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:24:08,517 INFO L470 AbstractCegarLoop]: Abstraction has 5489 states and 7903 transitions. [2021-11-25 20:24:08,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 10.789473684210526) internal successors, (205), 22 states have internal predecessors, (205), 11 states have call successors, (76), 6 states have call predecessors, (76), 9 states have return successors, (71), 11 states have call predecessors, (71), 11 states have call successors, (71) [2021-11-25 20:24:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 7903 transitions. [2021-11-25 20:24:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-11-25 20:24:08,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:24:08,555 INFO L514 BasicCegarLoop]: trace histogram [13, 11, 11, 11, 11, 8, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:24:08,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-25 20:24:08,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:24:08,769 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:24:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:24:08,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1885188726, now seen corresponding path program 1 times [2021-11-25 20:24:08,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:24:08,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837116476] [2021-11-25 20:24:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:08,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:24:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 61 proven. 55 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-11-25 20:24:09,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:24:09,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837116476] [2021-11-25 20:24:09,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837116476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:24:09,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038040554] [2021-11-25 20:24:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:24:09,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:24:09,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:24:09,184 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:24:09,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:24:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:24:09,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 20:24:09,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:24:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 137 proven. 34 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-11-25 20:24:10,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:24:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2021-11-25 20:24:11,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038040554] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:24:11,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1989676162] [2021-11-25 20:24:11,048 INFO L159 IcfgInterpreter]: Started Sifa with 122 locations of interest [2021-11-25 20:24:11,048 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:24:11,049 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:24:11,049 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:24:11,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:24:17,737 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2021-11-25 20:24:18,130 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2021-11-25 20:24:20,136 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-25 20:24:20,223 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 28 for LOIs [2021-11-25 20:24:20,278 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 88 for LOIs [2021-11-25 20:24:20,544 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2021-11-25 20:24:20,599 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2021-11-25 20:24:20,619 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 73 for LOIs [2021-11-25 20:24:20,635 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-25 20:24:20,641 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 20:24:23,899 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-25 20:24:23,968 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-25 20:24:23,972 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2021-11-25 20:24:26,095 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2021-11-25 20:24:29,878 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2021-11-25 20:24:30,255 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:24:45,128 WARN L227 SmtUtils]: Spent 7.61s on a formula simplification. DAG size of input: 631 DAG size of output: 508 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:24:54,256 WARN L227 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 671 DAG size of output: 522 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:25:00,193 WARN L227 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:25:06,126 WARN L227 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:25:15,131 WARN L227 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 778 DAG size of output: 644 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:25:21,806 WARN L227 SmtUtils]: Spent 5.42s on a formula simplification that was a NOOP. DAG size: 777 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:26:11,852 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '137170#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 (+ ~currentFloorID~0 2147483648)) (<= 0 |#NULL.base|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= 0 ~head~0.offset) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= ~currentFloorID~0 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 4 ~executiveFloor~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 12 ~cleanupTimeShifts~0) (<= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|))' at error location [2021-11-25 20:26:11,852 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:26:11,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:26:11,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 31 [2021-11-25 20:26:11,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523340070] [2021-11-25 20:26:11,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:26:11,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 20:26:11,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:26:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 20:26:11,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=947, Invalid=14553, Unknown=0, NotChecked=0, Total=15500 [2021-11-25 20:26:11,855 INFO L87 Difference]: Start difference. First operand 5489 states and 7903 transitions. Second operand has 31 states, 25 states have (on average 8.32) internal successors, (208), 25 states have internal predecessors, (208), 13 states have call successors, (85), 6 states have call predecessors, (85), 11 states have return successors, (83), 17 states have call predecessors, (83), 13 states have call successors, (83) [2021-11-25 20:26:27,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:26:27,683 INFO L93 Difference]: Finished difference Result 9943 states and 14494 transitions. [2021-11-25 20:26:27,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-25 20:26:27,684 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 8.32) internal successors, (208), 25 states have internal predecessors, (208), 13 states have call successors, (85), 6 states have call predecessors, (85), 11 states have return successors, (83), 17 states have call predecessors, (83), 13 states have call successors, (83) Word has length 327 [2021-11-25 20:26:27,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:26:27,717 INFO L225 Difference]: With dead ends: 9943 [2021-11-25 20:26:27,717 INFO L226 Difference]: Without dead ends: 6208 [2021-11-25 20:26:27,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 873 SyntacticMatches, 35 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12975 ImplicationChecksByTransitivity, 104.3s TimeCoverageRelationStatistics Valid=1835, Invalid=28965, Unknown=0, NotChecked=0, Total=30800 [2021-11-25 20:26:27,740 INFO L933 BasicCegarLoop]: 1003 mSDtfsCounter, 6868 mSDsluCounter, 8242 mSDsCounter, 0 mSdLazyCounter, 25602 mSolverCounterSat, 5071 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6893 SdHoareTripleChecker+Valid, 8563 SdHoareTripleChecker+Invalid, 30673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5071 IncrementalHoareTripleChecker+Valid, 25602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:26:27,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6893 Valid, 8563 Invalid, 30673 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5071 Valid, 25602 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2021-11-25 20:26:27,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6208 states. [2021-11-25 20:26:28,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6208 to 5947. [2021-11-25 20:26:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5947 states, 4233 states have (on average 1.3897944720056696) internal successors, (5883), 4360 states have internal predecessors, (5883), 1099 states have call successors, (1099), 572 states have call predecessors, (1099), 614 states have return successors, (1473), 1074 states have call predecessors, (1473), 1085 states have call successors, (1473) [2021-11-25 20:26:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5947 states to 5947 states and 8455 transitions. [2021-11-25 20:26:28,219 INFO L78 Accepts]: Start accepts. Automaton has 5947 states and 8455 transitions. Word has length 327 [2021-11-25 20:26:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:26:28,220 INFO L470 AbstractCegarLoop]: Abstraction has 5947 states and 8455 transitions. [2021-11-25 20:26:28,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 8.32) internal successors, (208), 25 states have internal predecessors, (208), 13 states have call successors, (85), 6 states have call predecessors, (85), 11 states have return successors, (83), 17 states have call predecessors, (83), 13 states have call successors, (83) [2021-11-25 20:26:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 5947 states and 8455 transitions. [2021-11-25 20:26:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-25 20:26:28,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:26:28,247 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:26:28,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:26:28,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 20:26:28,472 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:26:28,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:26:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1140465251, now seen corresponding path program 1 times [2021-11-25 20:26:28,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:26:28,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071830695] [2021-11-25 20:26:28,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:28,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:26:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 45 proven. 41 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-11-25 20:26:28,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:26:28,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071830695] [2021-11-25 20:26:28,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071830695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:26:28,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585545166] [2021-11-25 20:26:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:28,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:26:28,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:26:28,703 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:26:28,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ad8d1d8-446b-46de-9cc6-348902f918f1/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:26:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:29,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 2944 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:26:29,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:26:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 145 proven. 26 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-11-25 20:26:29,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:26:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 45 proven. 41 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-11-25 20:26:30,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585545166] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:26:30,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2022099966] [2021-11-25 20:26:30,423 INFO L159 IcfgInterpreter]: Started Sifa with 121 locations of interest [2021-11-25 20:26:30,423 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:26:30,423 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:26:30,423 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:26:30,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:26:37,843 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2021-11-25 20:26:38,290 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2021-11-25 20:26:43,224 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-25 20:26:43,388 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 28 for LOIs [2021-11-25 20:26:43,425 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 50 for LOIs [2021-11-25 20:26:43,463 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2021-11-25 20:26:43,517 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2021-11-25 20:26:43,536 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 102 for LOIs [2021-11-25 20:26:43,555 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-25 20:26:43,559 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 20:26:46,749 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-25 20:26:46,824 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-25 20:26:46,828 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2021-11-25 20:26:49,017 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2021-11-25 20:26:52,827 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2021-11-25 20:26:53,211 INFO L180 IcfgInterpreter]: Interpretation finished