./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.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_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/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_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/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_18d725dc-47e3-4da1-a530-daa37ec9defa/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 cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:11:45,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:11:45,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:11:45,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:11:45,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:11:45,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:11:45,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:11:45,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:11:45,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:11:45,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:11:45,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:11:45,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:11:45,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:11:45,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:11:45,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:11:45,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:11:45,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:11:45,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:11:45,339 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:11:45,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:11:45,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:11:45,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:11:45,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:11:45,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:11:45,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:11:45,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:11:45,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:11:45,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:11:45,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:11:45,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:11:45,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:11:45,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:11:45,377 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:11:45,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:11:45,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:11:45,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:11:45,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:11:45,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:11:45,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:11:45,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:11:45,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:11:45,384 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:11:45,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:11:45,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:11:45,438 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:11:45,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:11:45,444 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:11:45,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:11:45,445 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:11:45,445 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:11:45,445 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:11:45,445 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:11:45,445 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:11:45,445 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:11:45,445 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:11:45,446 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:11:45,446 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:11:45,446 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:11:45,446 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:11:45,446 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:11:45,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:11:45,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:11:45,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:11:45,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:11:45,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:11:45,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:11:45,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:11:45,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:11:45,449 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:11:45,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:11:45,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:11:45,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:11:45,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:11:45,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:11:45,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:11:45,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:11:45,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:11:45,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:11:45,452 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:11:45,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:11:45,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:11:45,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:11:45,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:11:45,453 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_18d725dc-47e3-4da1-a530-daa37ec9defa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb2818f0d8bce3a3c55c338823c603b0097898f29d2ecfaf46bb61225da928d8 [2021-11-25 20:11:45,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:11:45,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:11:45,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:11:45,775 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:11:45,776 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:11:45,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2021-11-25 20:11:45,836 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/data/8c439e500/e9b90546604643d0b30efe185223b5f8/FLAGc4c06be51 [2021-11-25 20:11:46,496 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:11:46,497 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c [2021-11-25 20:11:46,521 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/data/8c439e500/e9b90546604643d0b30efe185223b5f8/FLAGc4c06be51 [2021-11-25 20:11:46,728 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/data/8c439e500/e9b90546604643d0b30efe185223b5f8 [2021-11-25 20:11:46,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:11:46,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:11:46,738 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:11:46,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:11:46,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:11:46,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:11:46" (1/1) ... [2021-11-25 20:11:46,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ae9b3a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:46, skipping insertion in model container [2021-11-25 20:11:46,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:11:46" (1/1) ... [2021-11-25 20:11:46,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:11:46,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:11:47,488 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_18d725dc-47e3-4da1-a530-daa37ec9defa/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2021-11-25 20:11:47,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:11:47,509 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:11:47,622 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_18d725dc-47e3-4da1-a530-daa37ec9defa/sv-benchmarks/c/product-lines/elevator_spec3_product28.cil.c[73221,73234] [2021-11-25 20:11:47,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:11:47,653 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:11:47,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:47 WrapperNode [2021-11-25 20:11:47,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:11:47,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:11:47,655 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:11:47,655 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:11:47,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:47" (1/1) ... [2021-11-25 20:11:47,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:47" (1/1) ... [2021-11-25 20:11:47,776 INFO L137 Inliner]: procedures = 95, calls = 354, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 1156 [2021-11-25 20:11:47,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:11:47,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:11:47,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:11:47,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:11:47,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:47" (1/1) ... [2021-11-25 20:11:47,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:47" (1/1) ... [2021-11-25 20:11:47,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:47" (1/1) ... [2021-11-25 20:11:47,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:47" (1/1) ... [2021-11-25 20:11:47,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:47" (1/1) ... [2021-11-25 20:11:47,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:47" (1/1) ... [2021-11-25 20:11:47,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:47" (1/1) ... [2021-11-25 20:11:47,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:11:47,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:11:47,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:11:47,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:11:47,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:47" (1/1) ... [2021-11-25 20:11:47,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:11:47,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:48,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:11:48,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:11:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:11:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-25 20:11:48,095 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-25 20:11:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 20:11:48,095 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 20:11:48,095 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 20:11:48,095 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 20:11:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 20:11:48,096 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 20:11:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 20:11:48,096 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 20:11:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 20:11:48,096 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 20:11:48,096 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 20:11:48,097 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 20:11:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:11:48,097 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:11:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:11:48,097 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:11:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 20:11:48,097 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 20:11:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 20:11:48,097 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 20:11:48,097 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 20:11:48,098 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 20:11:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 20:11:48,098 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 20:11:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 20:11:48,098 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 20:11:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-25 20:11:48,098 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-25 20:11:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 20:11:48,099 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 20:11:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-25 20:11:48,099 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-25 20:11:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 20:11:48,099 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 20:11:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-25 20:11:48,100 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-25 20:11:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 20:11:48,100 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 20:11:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 20:11:48,101 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 20:11:48,101 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 20:11:48,101 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 20:11:48,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:11:48,101 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 20:11:48,102 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 20:11:48,102 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 20:11:48,102 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 20:11:48,102 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 20:11:48,102 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 20:11:48,102 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 20:11:48,103 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 20:11:48,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:11:48,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:11:48,103 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 20:11:48,103 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 20:11:48,104 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-25 20:11:48,104 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-25 20:11:48,249 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:11:48,252 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:11:49,624 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:11:50,273 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:11:50,273 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:11:50,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:11:50 BoogieIcfgContainer [2021-11-25 20:11:50,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:11:50,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:11:50,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:11:50,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:11:50,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:11:46" (1/3) ... [2021-11-25 20:11:50,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b51bb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:11:50, skipping insertion in model container [2021-11-25 20:11:50,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:11:47" (2/3) ... [2021-11-25 20:11:50,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b51bb6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:11:50, skipping insertion in model container [2021-11-25 20:11:50,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:11:50" (3/3) ... [2021-11-25 20:11:50,291 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product28.cil.c [2021-11-25 20:11:50,299 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:11:50,300 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:11:50,368 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:11:50,378 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 20:11:50,378 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:11:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand has 417 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 297 states have internal predecessors, (434), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) [2021-11-25 20:11:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 20:11:50,447 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:50,448 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-25 20:11:50,448 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:11:50,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash -707800898, now seen corresponding path program 1 times [2021-11-25 20:11:50,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:11:50,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560811633] [2021-11-25 20:11:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:50,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:11:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:11:51,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:11:51,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560811633] [2021-11-25 20:11:51,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560811633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:51,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:51,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:11:51,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751459212] [2021-11-25 20:11:51,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:51,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:11:51,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:11:51,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:11:51,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:11:51,102 INFO L87 Difference]: Start difference. First operand has 417 states, 277 states have (on average 1.5667870036101084) internal successors, (434), 297 states have internal predecessors, (434), 110 states have call successors, (110), 28 states have call predecessors, (110), 28 states have return successors, (110), 106 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:11:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:51,660 INFO L93 Difference]: Finished difference Result 1223 states and 1951 transitions. [2021-11-25 20:11:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:11:51,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2021-11-25 20:11:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:51,701 INFO L225 Difference]: With dead ends: 1223 [2021-11-25 20:11:51,702 INFO L226 Difference]: Without dead ends: 808 [2021-11-25 20:11:51,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:11:51,723 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 617 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:51,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 1355 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:11:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-11-25 20:11:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 770. [2021-11-25 20:11:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 529 states have (on average 1.5689981096408319) internal successors, (830), 556 states have internal predecessors, (830), 194 states have call successors, (194), 49 states have call predecessors, (194), 46 states have return successors, (197), 179 states have call predecessors, (197), 190 states have call successors, (197) [2021-11-25 20:11:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1221 transitions. [2021-11-25 20:11:51,931 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1221 transitions. Word has length 50 [2021-11-25 20:11:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:51,932 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1221 transitions. [2021-11-25 20:11:51,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 20:11:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1221 transitions. [2021-11-25 20:11:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 20:11:51,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:51,943 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 20:11:51,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:11:51,943 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:11:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:51,944 INFO L85 PathProgramCache]: Analyzing trace with hash -219053011, now seen corresponding path program 1 times [2021-11-25 20:11:51,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:11:51,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746092041] [2021-11-25 20:11:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:51,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:11:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:11:52,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:11:52,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746092041] [2021-11-25 20:11:52,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746092041] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:52,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:11:52,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:11:52,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064451097] [2021-11-25 20:11:52,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:52,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:11:52,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:11:52,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:11:52,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:11:52,163 INFO L87 Difference]: Start difference. First operand 770 states and 1221 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 20:11:53,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:53,154 INFO L93 Difference]: Finished difference Result 2002 states and 3268 transitions. [2021-11-25 20:11:53,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:11:53,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2021-11-25 20:11:53,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:53,174 INFO L225 Difference]: With dead ends: 2002 [2021-11-25 20:11:53,174 INFO L226 Difference]: Without dead ends: 1244 [2021-11-25 20:11:53,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:11:53,186 INFO L933 BasicCegarLoop]: 779 mSDtfsCounter, 673 mSDsluCounter, 2835 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 3473 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:53,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 3473 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:11:53,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-11-25 20:11:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 1127. [2021-11-25 20:11:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 777 states have (on average 1.5637065637065637) internal successors, (1215), 820 states have internal predecessors, (1215), 281 states have call successors, (281), 72 states have call predecessors, (281), 68 states have return successors, (304), 257 states have call predecessors, (304), 276 states have call successors, (304) [2021-11-25 20:11:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1800 transitions. [2021-11-25 20:11:53,317 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1800 transitions. Word has length 94 [2021-11-25 20:11:53,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:53,319 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 1800 transitions. [2021-11-25 20:11:53,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 20:11:53,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1800 transitions. [2021-11-25 20:11:53,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 20:11:53,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:53,326 INFO L514 BasicCegarLoop]: trace histogram [3, 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 20:11:53,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:11:53,327 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:11:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:53,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1536939791, now seen corresponding path program 1 times [2021-11-25 20:11:53,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:11:53,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814869932] [2021-11-25 20:11:53,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:53,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:11:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:11:53,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:11:53,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814869932] [2021-11-25 20:11:53,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814869932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:11:53,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137252625] [2021-11-25 20:11:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:53,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:53,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:53,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:53,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:11:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:53,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1809 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:11:53,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:11:54,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:54,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137252625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:54,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:11:54,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:11:54,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372656084] [2021-11-25 20:11:54,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:54,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:11:54,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:11:54,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:11:54,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:11:54,116 INFO L87 Difference]: Start difference. First operand 1127 states and 1800 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:11:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:54,412 INFO L93 Difference]: Finished difference Result 3208 states and 5234 transitions. [2021-11-25 20:11:54,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:11:54,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2021-11-25 20:11:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:54,438 INFO L225 Difference]: With dead ends: 3208 [2021-11-25 20:11:54,438 INFO L226 Difference]: Without dead ends: 2093 [2021-11-25 20:11:54,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:11:54,449 INFO L933 BasicCegarLoop]: 1076 mSDtfsCounter, 571 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:54,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 1591 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:11:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-11-25 20:11:54,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2038. [2021-11-25 20:11:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 1416 states have (on average 1.573446327683616) internal successors, (2228), 1502 states have internal predecessors, (2228), 493 states have call successors, (493), 129 states have call predecessors, (493), 128 states have return successors, (557), 452 states have call predecessors, (557), 488 states have call successors, (557) [2021-11-25 20:11:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 3278 transitions. [2021-11-25 20:11:54,596 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 3278 transitions. Word has length 93 [2021-11-25 20:11:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:54,597 INFO L470 AbstractCegarLoop]: Abstraction has 2038 states and 3278 transitions. [2021-11-25 20:11:54,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:11:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 3278 transitions. [2021-11-25 20:11:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 20:11:54,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:54,602 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 20:11:54,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:54,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:54,831 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:11:54,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:54,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1602393416, now seen corresponding path program 1 times [2021-11-25 20:11:54,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:11:54,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259718616] [2021-11-25 20:11:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:54,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:11:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:11:55,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:11:55,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259718616] [2021-11-25 20:11:55,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259718616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:11:55,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885794441] [2021-11-25 20:11:55,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:55,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:55,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:55,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:55,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:11:55,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:55,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1822 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:11:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:11:55,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:55,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885794441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:55,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:11:55,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:11:55,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954787239] [2021-11-25 20:11:55,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:55,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:11:55,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:11:55,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:11:55,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:11:55,621 INFO L87 Difference]: Start difference. First operand 2038 states and 3278 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:11:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:55,934 INFO L93 Difference]: Finished difference Result 4152 states and 6782 transitions. [2021-11-25 20:11:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:11:55,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2021-11-25 20:11:55,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:55,962 INFO L225 Difference]: With dead ends: 4152 [2021-11-25 20:11:55,962 INFO L226 Difference]: Without dead ends: 2126 [2021-11-25 20:11:55,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:11:55,986 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 33 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1204 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:55,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1204 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:55,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-11-25 20:11:56,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 2080. [2021-11-25 20:11:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1452 states have (on average 1.5633608815426998) internal successors, (2270), 1538 states have internal predecessors, (2270), 499 states have call successors, (499), 129 states have call predecessors, (499), 128 states have return successors, (563), 458 states have call predecessors, (563), 494 states have call successors, (563) [2021-11-25 20:11:56,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3332 transitions. [2021-11-25 20:11:56,177 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3332 transitions. Word has length 95 [2021-11-25 20:11:56,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:56,178 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 3332 transitions. [2021-11-25 20:11:56,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:11:56,179 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3332 transitions. [2021-11-25 20:11:56,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 20:11:56,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:56,191 INFO L514 BasicCegarLoop]: trace histogram [3, 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 20:11:56,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:56,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:56,406 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:11:56,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:56,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1203754772, now seen corresponding path program 1 times [2021-11-25 20:11:56,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:11:56,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969709822] [2021-11-25 20:11:56,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:56,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:11:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:11:56,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:11:56,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969709822] [2021-11-25 20:11:56,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969709822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:11:56,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154534038] [2021-11-25 20:11:56,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:56,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:56,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:56,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:56,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:11:56,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:56,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:11:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:11:57,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:57,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154534038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:57,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:11:57,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:11:57,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605846688] [2021-11-25 20:11:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:57,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:11:57,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:11:57,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:11:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:11:57,226 INFO L87 Difference]: Start difference. First operand 2080 states and 3332 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:11:57,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:57,505 INFO L93 Difference]: Finished difference Result 5114 states and 8320 transitions. [2021-11-25 20:11:57,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:11:57,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2021-11-25 20:11:57,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:11:57,552 INFO L225 Difference]: With dead ends: 5114 [2021-11-25 20:11:57,552 INFO L226 Difference]: Without dead ends: 3046 [2021-11-25 20:11:57,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:11:57,575 INFO L933 BasicCegarLoop]: 1043 mSDtfsCounter, 572 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:11:57,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 1558 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:11:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2021-11-25 20:11:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2979. [2021-11-25 20:11:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2085 states have (on average 1.5688249400479617) internal successors, (3271), 2214 states have internal predecessors, (3271), 708 states have call successors, (708), 183 states have call predecessors, (708), 185 states have return successors, (813), 650 states have call predecessors, (813), 703 states have call successors, (813) [2021-11-25 20:11:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 4792 transitions. [2021-11-25 20:11:57,776 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 4792 transitions. Word has length 93 [2021-11-25 20:11:57,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:11:57,777 INFO L470 AbstractCegarLoop]: Abstraction has 2979 states and 4792 transitions. [2021-11-25 20:11:57,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:11:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 4792 transitions. [2021-11-25 20:11:57,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 20:11:57,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:11:57,785 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-25 20:11:57,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:11:57,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:57,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:11:57,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:11:58,000 INFO L85 PathProgramCache]: Analyzing trace with hash 979137355, now seen corresponding path program 1 times [2021-11-25 20:11:58,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:11:58,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700694518] [2021-11-25 20:11:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:58,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:11:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 20:11:58,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:11:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700694518] [2021-11-25 20:11:58,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700694518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:11:58,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559471139] [2021-11-25 20:11:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:11:58,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:11:58,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:11:58,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:11:58,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:11:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:11:58,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:11:58,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:11:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:11:58,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:11:58,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559471139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:11:58,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:11:58,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-25 20:11:58,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995716867] [2021-11-25 20:11:58,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:11:58,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:11:58,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:11:58,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:11:58,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:11:58,860 INFO L87 Difference]: Start difference. First operand 2979 states and 4792 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-25 20:11:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:11:59,962 INFO L93 Difference]: Finished difference Result 8000 states and 13139 transitions. [2021-11-25 20:11:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:11:59,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2021-11-25 20:11:59,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:12:00,012 INFO L225 Difference]: With dead ends: 8000 [2021-11-25 20:12:00,012 INFO L226 Difference]: Without dead ends: 5033 [2021-11-25 20:12:00,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:12:00,043 INFO L933 BasicCegarLoop]: 706 mSDtfsCounter, 537 mSDsluCounter, 2320 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:12:00,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 2892 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:12:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5033 states. [2021-11-25 20:12:00,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5033 to 4999. [2021-11-25 20:12:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4999 states, 3485 states have (on average 1.50961262553802) internal successors, (5261), 3720 states have internal predecessors, (5261), 1187 states have call successors, (1187), 327 states have call predecessors, (1187), 326 states have return successors, (1467), 1064 states have call predecessors, (1467), 1179 states have call successors, (1467) [2021-11-25 20:12:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4999 states to 4999 states and 7915 transitions. [2021-11-25 20:12:00,428 INFO L78 Accepts]: Start accepts. Automaton has 4999 states and 7915 transitions. Word has length 95 [2021-11-25 20:12:00,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:12:00,429 INFO L470 AbstractCegarLoop]: Abstraction has 4999 states and 7915 transitions. [2021-11-25 20:12:00,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-25 20:12:00,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4999 states and 7915 transitions. [2021-11-25 20:12:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-25 20:12:00,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:12:00,435 INFO L514 BasicCegarLoop]: trace histogram [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 20:12:00,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:12:00,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:00,658 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:12:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:12:00,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2012415330, now seen corresponding path program 1 times [2021-11-25 20:12:00,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:12:00,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789332002] [2021-11-25 20:12:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:00,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:12:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:12:00,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:12:00,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789332002] [2021-11-25 20:12:00,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789332002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:12:00,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515198924] [2021-11-25 20:12:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:12:00,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:12:00,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:12:00,832 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:12:00,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:12:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:12:01,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:12:01,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:12:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:12:01,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:12:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:12:02,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515198924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:12:02,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [330718444] [2021-11-25 20:12:02,314 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2021-11-25 20:12:02,315 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:12:02,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:12:02,326 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:12:02,327 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:12:08,403 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-25 20:12:15,841 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2021-11-25 20:12:16,153 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-25 20:12:18,204 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-25 20:12:18,378 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-25 20:12:18,457 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-25 20:12:18,536 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-25 20:12:22,391 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-25 20:12:22,925 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-25 20:12:23,066 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:12:49,706 WARN L227 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:12:55,464 WARN L227 SmtUtils]: Spent 5.48s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:13:41,885 WARN L227 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 511 DAG size of output: 450 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:13:51,120 WARN L227 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 547 DAG size of output: 458 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:14:11,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [330718444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:14:11,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:14:11,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2021-11-25 20:14:11,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373699969] [2021-11-25 20:14:11,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:14:11,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 20:14:11,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:14:11,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 20:14:11,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 20:14:11,453 INFO L87 Difference]: Start difference. First operand 4999 states and 7915 transitions. Second operand has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2021-11-25 20:14:38,970 WARN L227 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 607 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:14:47,580 WARN L227 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 613 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:15:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:15:11,491 INFO L93 Difference]: Finished difference Result 10132 states and 16048 transitions. [2021-11-25 20:15:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 20:15:11,492 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2021-11-25 20:15:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:15:11,531 INFO L225 Difference]: With dead ends: 10132 [2021-11-25 20:15:11,532 INFO L226 Difference]: Without dead ends: 5145 [2021-11-25 20:15:11,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 143.2s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 20:15:11,563 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 173 mSDsluCounter, 3526 mSDsCounter, 0 mSdLazyCounter, 6386 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 4160 SdHoareTripleChecker+Invalid, 6457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 6386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:15:11,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 4160 Invalid, 6457 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [71 Valid, 6386 Invalid, 0 Unknown, 0 Unchecked, 25.0s Time] [2021-11-25 20:15:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5145 states. [2021-11-25 20:15:11,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5145 to 5066. [2021-11-25 20:15:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5066 states, 3531 states have (on average 1.5049561030869443) internal successors, (5314), 3766 states have internal predecessors, (5314), 1201 states have call successors, (1201), 336 states have call predecessors, (1201), 333 states have return successors, (1484), 1076 states have call predecessors, (1484), 1193 states have call successors, (1484) [2021-11-25 20:15:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5066 states to 5066 states and 7999 transitions. [2021-11-25 20:15:11,919 INFO L78 Accepts]: Start accepts. Automaton has 5066 states and 7999 transitions. Word has length 100 [2021-11-25 20:15:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:15:11,920 INFO L470 AbstractCegarLoop]: Abstraction has 5066 states and 7999 transitions. [2021-11-25 20:15:11,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2021-11-25 20:15:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 5066 states and 7999 transitions. [2021-11-25 20:15:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-25 20:15:11,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:15:11,925 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-25 20:15:11,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:15:12,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:12,146 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:15:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:15:12,147 INFO L85 PathProgramCache]: Analyzing trace with hash -460668467, now seen corresponding path program 1 times [2021-11-25 20:15:12,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:15:12,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988560094] [2021-11-25 20:15:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:12,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:15:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:15:12,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:15:12,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988560094] [2021-11-25 20:15:12,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988560094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:15:12,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449394329] [2021-11-25 20:15:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:15:12,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:15:12,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:15:12,326 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:15:12,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:15:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:15:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:15:12,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:15:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 20:15:13,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:15:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:15:13,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449394329] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:15:13,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186140075] [2021-11-25 20:15:13,510 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2021-11-25 20:15:13,511 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:15:13,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:15:13,512 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:15:13,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:15:17,760 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-25 20:15:25,610 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2021-11-25 20:15:25,624 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-25 20:15:27,512 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-25 20:15:27,681 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-25 20:15:27,756 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-25 20:15:27,831 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-25 20:15:31,097 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-25 20:15:31,628 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-25 20:15:31,766 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:15:56,376 WARN L227 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:16:02,013 WARN L227 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:17:09,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [186140075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:17:09,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:17:09,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2021-11-25 20:17:09,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195677312] [2021-11-25 20:17:09,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:17:09,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 20:17:09,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:17:09,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 20:17:09,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 20:17:09,410 INFO L87 Difference]: Start difference. First operand 5066 states and 7999 transitions. Second operand has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2021-11-25 20:18:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:00,042 INFO L93 Difference]: Finished difference Result 10110 states and 16006 transitions. [2021-11-25 20:18:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-25 20:18:00,043 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 106 [2021-11-25 20:18:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:00,082 INFO L225 Difference]: With dead ends: 10110 [2021-11-25 20:18:00,082 INFO L226 Difference]: Without dead ends: 5135 [2021-11-25 20:18:00,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 268 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 123.3s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 20:18:00,101 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 155 mSDsluCounter, 4481 mSDsCounter, 0 mSdLazyCounter, 7392 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 5095 SdHoareTripleChecker+Invalid, 7453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 7392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:00,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 5095 Invalid, 7453 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [61 Valid, 7392 Invalid, 0 Unknown, 0 Unchecked, 24.7s Time] [2021-11-25 20:18:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5135 states. [2021-11-25 20:18:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5135 to 5068. [2021-11-25 20:18:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5068 states, 3532 states have (on average 1.5045300113250284) internal successors, (5314), 3767 states have internal predecessors, (5314), 1201 states have call successors, (1201), 337 states have call predecessors, (1201), 334 states have return successors, (1484), 1076 states have call predecessors, (1484), 1193 states have call successors, (1484) [2021-11-25 20:18:00,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5068 states to 5068 states and 7999 transitions. [2021-11-25 20:18:00,436 INFO L78 Accepts]: Start accepts. Automaton has 5068 states and 7999 transitions. Word has length 106 [2021-11-25 20:18:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:00,436 INFO L470 AbstractCegarLoop]: Abstraction has 5068 states and 7999 transitions. [2021-11-25 20:18:00,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2021-11-25 20:18:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 5068 states and 7999 transitions. [2021-11-25 20:18:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-25 20:18:00,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:00,440 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-11-25 20:18:00,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:18:00,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 20:18:00,659 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:00,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:00,660 INFO L85 PathProgramCache]: Analyzing trace with hash -92742893, now seen corresponding path program 1 times [2021-11-25 20:18:00,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:00,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663166228] [2021-11-25 20:18:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:00,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 20:18:00,766 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:00,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663166228] [2021-11-25 20:18:00,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663166228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:00,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:00,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:18:00,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962389650] [2021-11-25 20:18:00,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:00,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:18:00,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:18:00,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:18:00,769 INFO L87 Difference]: Start difference. First operand 5068 states and 7999 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 20:18:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:01,209 INFO L93 Difference]: Finished difference Result 11242 states and 17809 transitions. [2021-11-25 20:18:01,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:18:01,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 111 [2021-11-25 20:18:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:01,243 INFO L225 Difference]: With dead ends: 11242 [2021-11-25 20:18:01,243 INFO L226 Difference]: Without dead ends: 6229 [2021-11-25 20:18:01,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 20:18:01,262 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 447 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:01,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 1799 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:01,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6229 states. [2021-11-25 20:18:01,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6229 to 6035. [2021-11-25 20:18:01,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6035 states, 4185 states have (on average 1.4652329749103943) internal successors, (6132), 4413 states have internal predecessors, (6132), 1389 states have call successors, (1389), 442 states have call predecessors, (1389), 460 states have return successors, (1777), 1285 states have call predecessors, (1777), 1378 states have call successors, (1777) [2021-11-25 20:18:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6035 states to 6035 states and 9298 transitions. [2021-11-25 20:18:01,652 INFO L78 Accepts]: Start accepts. Automaton has 6035 states and 9298 transitions. Word has length 111 [2021-11-25 20:18:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:01,653 INFO L470 AbstractCegarLoop]: Abstraction has 6035 states and 9298 transitions. [2021-11-25 20:18:01,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-25 20:18:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 6035 states and 9298 transitions. [2021-11-25 20:18:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-25 20:18:01,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:01,657 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-11-25 20:18:01,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:18:01,657 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:01,658 INFO L85 PathProgramCache]: Analyzing trace with hash -395249426, now seen corresponding path program 1 times [2021-11-25 20:18:01,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:01,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631122153] [2021-11-25 20:18:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:01,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:18:01,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:01,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631122153] [2021-11-25 20:18:01,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631122153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:18:01,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070786501] [2021-11-25 20:18:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:01,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:18:01,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:01,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:18:01,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:18:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:02,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:18:02,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:18:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 20:18:02,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:18:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 20:18:02,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070786501] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:18:02,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22213891] [2021-11-25 20:18:02,950 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2021-11-25 20:18:02,950 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:18:02,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:18:02,951 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:18:02,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:18:06,691 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-25 20:18:16,400 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2021-11-25 20:18:16,573 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-25 20:18:18,443 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-25 20:18:18,611 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-25 20:18:18,687 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-25 20:18:18,762 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-25 20:18:22,127 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-25 20:18:22,631 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-25 20:18:22,768 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:18:47,368 WARN L227 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:18:52,956 WARN L227 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:20:17,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [22213891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:17,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:20:17,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2021-11-25 20:20:17,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629145702] [2021-11-25 20:20:17,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:17,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 20:20:17,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:17,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 20:20:17,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 20:20:17,666 INFO L87 Difference]: Start difference. First operand 6035 states and 9298 transitions. Second operand has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-25 20:20:43,127 WARN L227 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 609 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:20:49,653 WARN L227 SmtUtils]: Spent 6.32s on a formula simplification. DAG size of input: 615 DAG size of output: 595 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:21:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:12,994 INFO L93 Difference]: Finished difference Result 12046 states and 18598 transitions. [2021-11-25 20:21:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-25 20:21:12,994 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 112 [2021-11-25 20:21:12,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:13,024 INFO L225 Difference]: With dead ends: 12046 [2021-11-25 20:21:13,025 INFO L226 Difference]: Without dead ends: 6103 [2021-11-25 20:21:13,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 282 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 145.2s TimeCoverageRelationStatistics Valid=496, Invalid=2810, Unknown=0, NotChecked=0, Total=3306 [2021-11-25 20:21:13,043 INFO L933 BasicCegarLoop]: 578 mSDtfsCounter, 274 mSDsluCounter, 5043 mSDsCounter, 0 mSdLazyCounter, 7273 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 5528 SdHoareTripleChecker+Invalid, 7369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 7273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:13,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 5528 Invalid, 7369 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 7273 Invalid, 0 Unknown, 0 Unchecked, 24.8s Time] [2021-11-25 20:21:13,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6103 states. [2021-11-25 20:21:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6103 to 6036. [2021-11-25 20:21:13,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6036 states, 4186 states have (on average 1.4648829431438126) internal successors, (6132), 4414 states have internal predecessors, (6132), 1388 states have call successors, (1388), 443 states have call predecessors, (1388), 461 states have return successors, (1767), 1284 states have call predecessors, (1767), 1377 states have call successors, (1767) [2021-11-25 20:21:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6036 states to 6036 states and 9287 transitions. [2021-11-25 20:21:13,415 INFO L78 Accepts]: Start accepts. Automaton has 6036 states and 9287 transitions. Word has length 112 [2021-11-25 20:21:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:13,416 INFO L470 AbstractCegarLoop]: Abstraction has 6036 states and 9287 transitions. [2021-11-25 20:21:13,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-25 20:21:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 6036 states and 9287 transitions. [2021-11-25 20:21:13,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-25 20:21:13,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:13,425 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:21:13,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:13,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:13,638 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:13,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash -923891240, now seen corresponding path program 1 times [2021-11-25 20:21:13,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:13,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542217151] [2021-11-25 20:21:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:13,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:13,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 20:21:13,795 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:13,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542217151] [2021-11-25 20:21:13,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542217151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:13,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731476549] [2021-11-25 20:21:13,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:13,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:13,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:13,796 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:13,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:21:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:14,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:21:14,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-25 20:21:14,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:21:14,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731476549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:14,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:21:14,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2021-11-25 20:21:14,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974372341] [2021-11-25 20:21:14,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:14,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 20:21:14,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:14,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 20:21:14,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:21:14,469 INFO L87 Difference]: Start difference. First operand 6036 states and 9287 transitions. Second operand has 10 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-25 20:21:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:17,770 INFO L93 Difference]: Finished difference Result 15297 states and 24257 transitions. [2021-11-25 20:21:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 20:21:17,771 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) Word has length 183 [2021-11-25 20:21:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:17,824 INFO L225 Difference]: With dead ends: 15297 [2021-11-25 20:21:17,824 INFO L226 Difference]: Without dead ends: 9360 [2021-11-25 20:21:17,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 20:21:17,856 INFO L933 BasicCegarLoop]: 1057 mSDtfsCounter, 1615 mSDsluCounter, 2922 mSDsCounter, 0 mSdLazyCounter, 6001 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 3768 SdHoareTripleChecker+Invalid, 6798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 6001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:17,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1635 Valid, 3768 Invalid, 6798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 6001 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-25 20:21:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2021-11-25 20:21:18,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 8349. [2021-11-25 20:21:18,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8349 states, 5766 states have (on average 1.450398890045092) internal successors, (8363), 6040 states have internal predecessors, (8363), 1904 states have call successors, (1904), 679 states have call predecessors, (1904), 678 states have return successors, (2512), 1769 states have call predecessors, (2512), 1885 states have call successors, (2512) [2021-11-25 20:21:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8349 states to 8349 states and 12779 transitions. [2021-11-25 20:21:18,517 INFO L78 Accepts]: Start accepts. Automaton has 8349 states and 12779 transitions. Word has length 183 [2021-11-25 20:21:18,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:18,518 INFO L470 AbstractCegarLoop]: Abstraction has 8349 states and 12779 transitions. [2021-11-25 20:21:18,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-25 20:21:18,519 INFO L276 IsEmpty]: Start isEmpty. Operand 8349 states and 12779 transitions. [2021-11-25 20:21:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-25 20:21:18,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:18,535 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:21:18,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:18,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:18,758 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:21:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash -671829944, now seen corresponding path program 1 times [2021-11-25 20:21:18,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:18,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746435102] [2021-11-25 20:21:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:18,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 20:21:18,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:18,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746435102] [2021-11-25 20:21:18,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746435102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:18,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973493220] [2021-11-25 20:21:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:18,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:18,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:18,909 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:18,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:21:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:19,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 20:21:19,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 93 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 20:21:19,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:21:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 20:21:20,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973493220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:21:20,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787203387] [2021-11-25 20:21:20,421 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2021-11-25 20:21:20,421 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:21:20,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:21:20,422 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:21:20,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:21:27,560 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs [2021-11-25 20:21:34,610 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 73 for LOIs [2021-11-25 20:21:35,476 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 74 for LOIs [2021-11-25 20:21:36,025 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 61 for LOIs [2021-11-25 20:21:36,142 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 63 for LOIs [2021-11-25 20:21:36,168 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 46 for LOIs [2021-11-25 20:21:36,173 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 36 for LOIs [2021-11-25 20:21:36,188 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-25 20:21:38,091 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-25 20:21:38,257 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 27 for LOIs [2021-11-25 20:21:38,260 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 71 for LOIs [2021-11-25 20:21:38,483 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 65 for LOIs [2021-11-25 20:21:38,495 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 53 for LOIs [2021-11-25 20:21:38,510 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-25 20:21:41,847 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-25 20:21:42,355 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-25 20:21:42,492 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:22:07,730 WARN L227 SmtUtils]: Spent 5.39s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:22:13,412 WARN L227 SmtUtils]: Spent 5.44s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:22:30,284 WARN L227 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 683 DAG size of output: 579 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:22:56,170 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '184705#(and (= ~executiveFloor~0 4) (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2021-11-25 20:22:56,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:22:56,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:22:56,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 21 [2021-11-25 20:22:56,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100018691] [2021-11-25 20:22:56,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:22:56,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 20:22:56,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:22:56,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 20:22:56,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=11366, Unknown=0, NotChecked=0, Total=12210 [2021-11-25 20:22:56,178 INFO L87 Difference]: Start difference. First operand 8349 states and 12779 transitions. Second operand has 21 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 12 states have call successors, (76), 7 states have call predecessors, (76), 11 states have return successors, (74), 15 states have call predecessors, (74), 12 states have call successors, (74) [2021-11-25 20:23:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:02,820 INFO L93 Difference]: Finished difference Result 31123 states and 51443 transitions. [2021-11-25 20:23:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-25 20:23:02,821 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 12 states have call successors, (76), 7 states have call predecessors, (76), 11 states have return successors, (74), 15 states have call predecessors, (74), 12 states have call successors, (74) Word has length 186 [2021-11-25 20:23:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:02,945 INFO L225 Difference]: With dead ends: 31123 [2021-11-25 20:23:02,945 INFO L226 Difference]: Without dead ends: 22862 [2021-11-25 20:23:03,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 453 SyntacticMatches, 12 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6659 ImplicationChecksByTransitivity, 74.4s TimeCoverageRelationStatistics Valid=1078, Invalid=15178, Unknown=0, NotChecked=0, Total=16256 [2021-11-25 20:23:03,004 INFO L933 BasicCegarLoop]: 1055 mSDtfsCounter, 4793 mSDsluCounter, 3288 mSDsCounter, 0 mSdLazyCounter, 8038 mSolverCounterSat, 3310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4901 SdHoareTripleChecker+Valid, 4057 SdHoareTripleChecker+Invalid, 11348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3310 IncrementalHoareTripleChecker+Valid, 8038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:03,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4901 Valid, 4057 Invalid, 11348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3310 Valid, 8038 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-11-25 20:23:03,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22862 states. [2021-11-25 20:23:03,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22862 to 19562. [2021-11-25 20:23:03,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19562 states, 13306 states have (on average 1.4456636104013227) internal successors, (19236), 14157 states have internal predecessors, (19236), 4764 states have call successors, (4764), 1453 states have call predecessors, (4764), 1491 states have return successors, (6688), 4395 states have call predecessors, (6688), 4739 states have call successors, (6688) [2021-11-25 20:23:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19562 states to 19562 states and 30688 transitions. [2021-11-25 20:23:04,151 INFO L78 Accepts]: Start accepts. Automaton has 19562 states and 30688 transitions. Word has length 186 [2021-11-25 20:23:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:04,152 INFO L470 AbstractCegarLoop]: Abstraction has 19562 states and 30688 transitions. [2021-11-25 20:23:04,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 12 states have call successors, (76), 7 states have call predecessors, (76), 11 states have return successors, (74), 15 states have call predecessors, (74), 12 states have call successors, (74) [2021-11-25 20:23:04,153 INFO L276 IsEmpty]: Start isEmpty. Operand 19562 states and 30688 transitions. [2021-11-25 20:23:04,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-25 20:23:04,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:04,179 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:04,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:23:04,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 20:23:04,406 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:04,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:04,407 INFO L85 PathProgramCache]: Analyzing trace with hash 827210483, now seen corresponding path program 1 times [2021-11-25 20:23:04,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:04,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399898802] [2021-11-25 20:23:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:04,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-25 20:23:04,575 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:04,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399898802] [2021-11-25 20:23:04,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399898802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:04,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003553639] [2021-11-25 20:23:04,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:04,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:04,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:04,578 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:04,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:23:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:05,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:23:05,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-25 20:23:05,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:23:05,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003553639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:05,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:23:05,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2021-11-25 20:23:05,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715076921] [2021-11-25 20:23:05,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:05,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:23:05,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:05,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:23:05,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-25 20:23:05,320 INFO L87 Difference]: Start difference. First operand 19562 states and 30688 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:23:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:23:06,534 INFO L93 Difference]: Finished difference Result 40479 states and 64626 transitions. [2021-11-25 20:23:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:23:06,535 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) Word has length 192 [2021-11-25 20:23:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:23:06,666 INFO L225 Difference]: With dead ends: 40479 [2021-11-25 20:23:06,667 INFO L226 Difference]: Without dead ends: 22951 [2021-11-25 20:23:06,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-11-25 20:23:06,757 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 117 mSDsluCounter, 2859 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 3430 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:23:06,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 3430 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:23:06,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22951 states. [2021-11-25 20:23:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22951 to 19816. [2021-11-25 20:23:07,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19816 states, 13502 states have (on average 1.4391941934528218) internal successors, (19432), 14365 states have internal predecessors, (19432), 4764 states have call successors, (4764), 1453 states have call predecessors, (4764), 1549 states have return successors, (6768), 4441 states have call predecessors, (6768), 4739 states have call successors, (6768) [2021-11-25 20:23:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19816 states to 19816 states and 30964 transitions. [2021-11-25 20:23:08,069 INFO L78 Accepts]: Start accepts. Automaton has 19816 states and 30964 transitions. Word has length 192 [2021-11-25 20:23:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:23:08,069 INFO L470 AbstractCegarLoop]: Abstraction has 19816 states and 30964 transitions. [2021-11-25 20:23:08,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-25 20:23:08,070 INFO L276 IsEmpty]: Start isEmpty. Operand 19816 states and 30964 transitions. [2021-11-25 20:23:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-25 20:23:08,094 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:23:08,094 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:23:08,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-25 20:23:08,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 20:23:08,310 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:23:08,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:23:08,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1662985100, now seen corresponding path program 1 times [2021-11-25 20:23:08,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:23:08,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751641343] [2021-11-25 20:23:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:08,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:23:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-25 20:23:08,690 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:23:08,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751641343] [2021-11-25 20:23:08,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751641343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:23:08,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877877230] [2021-11-25 20:23:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:23:08,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:23:08,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:23:08,691 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:23:08,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d725dc-47e3-4da1-a530-daa37ec9defa/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:23:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:23:09,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2529 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 20:23:09,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:23:09,477 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 89 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 20:23:09,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:23:10,351 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-25 20:23:10,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877877230] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:23:10,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1659879375] [2021-11-25 20:23:10,354 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2021-11-25 20:23:10,354 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:23:10,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:23:10,356 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:23:10,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs