./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:23:00,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:23:00,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:23:00,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:23:00,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:23:00,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:23:00,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:23:00,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:23:00,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:23:00,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:23:00,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:23:00,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:23:00,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:23:00,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:23:00,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:23:00,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:23:00,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:23:00,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:23:00,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:23:00,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:23:00,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:23:00,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:23:00,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:23:00,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:23:00,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:23:00,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:23:00,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:23:00,472 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:23:00,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:23:00,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:23:00,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:23:00,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:23:00,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:23:00,477 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:23:00,478 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:23:00,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:23:00,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:23:00,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:23:00,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:23:00,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:23:00,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:23:00,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:23:00,509 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:23:00,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:23:00,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:23:00,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:23:00,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:23:00,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:23:00,512 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:23:00,512 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:23:00,512 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:23:00,512 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:23:00,513 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:23:00,513 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:23:00,513 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:23:00,513 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:23:00,513 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:23:00,514 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:23:00,514 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:23:00,514 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:23:00,515 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:23:00,515 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:23:00,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:23:00,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:23:00,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:23:00,516 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:23:00,521 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:23:00,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:23:00,523 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:23:00,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:23:00,523 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:23:00,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:23:00,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:23:00,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:23:00,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:23:00,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:23:00,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:23:00,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:23:00,527 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:23:00,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:23:00,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:23:00,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:23:00,529 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:23:00,529 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_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c [2021-11-23 02:23:00,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:23:00,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:23:00,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:23:00,848 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:23:00,849 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:23:00,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2021-11-23 02:23:00,926 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/data/4e6a2a14e/aef1dc3a738d405f9cbfba2e373643de/FLAGa1fd863b8 [2021-11-23 02:23:01,666 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:23:01,667 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2021-11-23 02:23:01,705 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/data/4e6a2a14e/aef1dc3a738d405f9cbfba2e373643de/FLAGa1fd863b8 [2021-11-23 02:23:01,798 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/data/4e6a2a14e/aef1dc3a738d405f9cbfba2e373643de [2021-11-23 02:23:01,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:23:01,804 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:23:01,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:23:01,808 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:23:01,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:23:01,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:01" (1/1) ... [2021-11-23 02:23:01,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@476de770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:01, skipping insertion in model container [2021-11-23 02:23:01,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:23:01" (1/1) ... [2021-11-23 02:23:01,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:23:01,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:23:02,263 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_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2021-11-23 02:23:02,624 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:23:02,634 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:23:02,653 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_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2021-11-23 02:23:02,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:23:02,833 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:23:02,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02 WrapperNode [2021-11-23 02:23:02,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:23:02,834 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:23:02,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:23:02,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:23:02,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02" (1/1) ... [2021-11-23 02:23:02,909 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02" (1/1) ... [2021-11-23 02:23:02,979 INFO L137 Inliner]: procedures = 97, calls = 361, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 1010 [2021-11-23 02:23:02,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:23:02,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:23:02,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:23:02,981 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:23:02,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02" (1/1) ... [2021-11-23 02:23:02,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02" (1/1) ... [2021-11-23 02:23:03,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02" (1/1) ... [2021-11-23 02:23:03,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02" (1/1) ... [2021-11-23 02:23:03,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02" (1/1) ... [2021-11-23 02:23:03,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02" (1/1) ... [2021-11-23 02:23:03,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02" (1/1) ... [2021-11-23 02:23:03,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:23:03,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:23:03,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:23:03,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:23:03,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02" (1/1) ... [2021-11-23 02:23:03,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:23:03,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:23:03,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:23:03,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:23:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-23 02:23:03,228 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-23 02:23:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-23 02:23:03,228 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-23 02:23:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-23 02:23:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-23 02:23:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-23 02:23:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-23 02:23:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 02:23:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 02:23:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-23 02:23:03,230 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-23 02:23:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-23 02:23:03,230 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-23 02:23:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-23 02:23:03,230 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-23 02:23:03,230 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-23 02:23:03,230 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-23 02:23:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-23 02:23:03,231 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-23 02:23:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-23 02:23:03,231 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-23 02:23:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:23:03,231 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-23 02:23:03,231 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-23 02:23:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-23 02:23:03,232 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-23 02:23:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-23 02:23:03,232 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-23 02:23:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-23 02:23:03,232 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-23 02:23:03,232 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-23 02:23:03,233 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-23 02:23:03,233 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 02:23:03,233 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 02:23:03,233 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-23 02:23:03,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-23 02:23:03,234 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-23 02:23:03,234 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-23 02:23:03,234 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-23 02:23:03,234 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-23 02:23:03,234 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-23 02:23:03,234 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-23 02:23:03,235 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-23 02:23:03,235 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-23 02:23:03,235 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-23 02:23:03,236 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-23 02:23:03,237 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-23 02:23:03,237 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-23 02:23:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-23 02:23:03,238 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-23 02:23:03,238 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-23 02:23:03,239 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-23 02:23:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:23:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-23 02:23:03,239 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-23 02:23:03,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:23:03,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:23:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-23 02:23:03,240 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-23 02:23:03,240 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-23 02:23:03,241 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-23 02:23:03,456 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:23:03,460 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:23:04,757 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:23:05,426 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:23:05,426 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:23:05,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:05 BoogieIcfgContainer [2021-11-23 02:23:05,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:23:05,435 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:23:05,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:23:05,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:23:05,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:23:01" (1/3) ... [2021-11-23 02:23:05,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7002e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:05, skipping insertion in model container [2021-11-23 02:23:05,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:23:02" (2/3) ... [2021-11-23 02:23:05,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7002e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:23:05, skipping insertion in model container [2021-11-23 02:23:05,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:23:05" (3/3) ... [2021-11-23 02:23:05,442 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product32.cil.c [2021-11-23 02:23:05,452 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:23:05,452 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:23:05,515 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:23:05,523 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:23:05,523 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:23:05,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) [2021-11-23 02:23:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:23:05,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:05,563 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] [2021-11-23 02:23:05,564 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:05,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:05,569 INFO L85 PathProgramCache]: Analyzing trace with hash -176782080, now seen corresponding path program 1 times [2021-11-23 02:23:05,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:05,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899395759] [2021-11-23 02:23:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:05,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:23:06,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:06,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899395759] [2021-11-23 02:23:06,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899395759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:23:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107555083] [2021-11-23 02:23:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:06,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:06,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:23:06,141 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:23:06,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:23:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:06,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:23:06,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:23:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:23:06,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:23:06,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107555083] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:06,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:23:06,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:23:06,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706710396] [2021-11-23 02:23:06,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:06,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:23:06,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:06,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:23:06,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:23:06,757 INFO L87 Difference]: Start difference. First operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:23:07,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:07,191 INFO L93 Difference]: Finished difference Result 1225 states and 1938 transitions. [2021-11-23 02:23:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:23:07,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 50 [2021-11-23 02:23:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:07,225 INFO L225 Difference]: With dead ends: 1225 [2021-11-23 02:23:07,225 INFO L226 Difference]: Without dead ends: 793 [2021-11-23 02:23:07,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:23:07,242 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 578 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:07,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 1385 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:23:07,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-11-23 02:23:07,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 781. [2021-11-23 02:23:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 523 states have (on average 1.5468451242829828) internal successors, (809), 558 states have internal predecessors, (809), 205 states have call successors, (205), 53 states have call predecessors, (205), 52 states have return successors, (207), 197 states have call predecessors, (207), 202 states have call successors, (207) [2021-11-23 02:23:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1221 transitions. [2021-11-23 02:23:07,406 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1221 transitions. Word has length 50 [2021-11-23 02:23:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:07,407 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1221 transitions. [2021-11-23 02:23:07,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-23 02:23:07,407 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1221 transitions. [2021-11-23 02:23:07,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:23:07,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:07,411 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] [2021-11-23 02:23:07,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:23:07,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-23 02:23:07,629 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:07,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:07,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1180145387, now seen corresponding path program 1 times [2021-11-23 02:23:07,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:07,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5694159] [2021-11-23 02:23:07,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:07,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:23:07,802 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:07,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5694159] [2021-11-23 02:23:07,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5694159] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:23:07,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286768906] [2021-11-23 02:23:07,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:07,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:07,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:23:07,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:23:07,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:23:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:08,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:23:08,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:23:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:23:08,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:23:08,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286768906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:08,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:23:08,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:23:08,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723931733] [2021-11-23 02:23:08,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:08,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:23:08,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:08,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:23:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:23:08,235 INFO L87 Difference]: Start difference. First operand 781 states and 1221 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:23:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:08,496 INFO L93 Difference]: Finished difference Result 1915 states and 3024 transitions. [2021-11-23 02:23:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:23:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2021-11-23 02:23:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:08,513 INFO L225 Difference]: With dead ends: 1915 [2021-11-23 02:23:08,514 INFO L226 Difference]: Without dead ends: 1146 [2021-11-23 02:23:08,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:23:08,520 INFO L933 BasicCegarLoop]: 1077 mSDtfsCounter, 633 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1615 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:08,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1615 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:23:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-11-23 02:23:08,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1122. [2021-11-23 02:23:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 755 states have (on average 1.5536423841059603) internal successors, (1173), 807 states have internal predecessors, (1173), 292 states have call successors, (292), 74 states have call predecessors, (292), 74 states have return successors, (299), 282 states have call predecessors, (299), 289 states have call successors, (299) [2021-11-23 02:23:08,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1764 transitions. [2021-11-23 02:23:08,616 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1764 transitions. Word has length 49 [2021-11-23 02:23:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:08,617 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1764 transitions. [2021-11-23 02:23:08,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-23 02:23:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1764 transitions. [2021-11-23 02:23:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:23:08,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:08,621 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] [2021-11-23 02:23:08,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:23:08,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:08,849 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:08,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:08,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1524168596, now seen corresponding path program 1 times [2021-11-23 02:23:08,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:08,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983841612] [2021-11-23 02:23:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:08,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:23:09,011 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:09,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983841612] [2021-11-23 02:23:09,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983841612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:09,011 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:23:09,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:23:09,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453509407] [2021-11-23 02:23:09,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:09,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:23:09,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:23:09,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:23:09,017 INFO L87 Difference]: Start difference. First operand 1122 states and 1764 transitions. 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) [2021-11-23 02:23:09,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:09,412 INFO L93 Difference]: Finished difference Result 3336 states and 5296 transitions. [2021-11-23 02:23:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:23:09,413 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 [2021-11-23 02:23:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:09,437 INFO L225 Difference]: With dead ends: 3336 [2021-11-23 02:23:09,438 INFO L226 Difference]: Without dead ends: 2226 [2021-11-23 02:23:09,447 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 [2021-11-23 02:23:09,451 INFO L933 BasicCegarLoop]: 779 mSDtfsCounter, 633 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1390 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:09,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1390 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:23:09,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-11-23 02:23:09,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2108. [2021-11-23 02:23:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2108 states, 1461 states have (on average 1.57015742642026) internal successors, (2294), 1542 states have internal predecessors, (2294), 515 states have call successors, (515), 130 states have call predecessors, (515), 131 states have return successors, (550), 480 states have call predecessors, (550), 511 states have call successors, (550) [2021-11-23 02:23:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3359 transitions. [2021-11-23 02:23:09,637 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3359 transitions. Word has length 50 [2021-11-23 02:23:09,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:09,639 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 3359 transitions. [2021-11-23 02:23:09,640 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) [2021-11-23 02:23:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3359 transitions. [2021-11-23 02:23:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 02:23:09,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:09,655 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] [2021-11-23 02:23:09,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:23:09,655 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:09,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:09,656 INFO L85 PathProgramCache]: Analyzing trace with hash -470509726, now seen corresponding path program 1 times [2021-11-23 02:23:09,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:09,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322079601] [2021-11-23 02:23:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:09,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:23:09,837 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322079601] [2021-11-23 02:23:09,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322079601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:23:09,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424206228] [2021-11-23 02:23:09,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:09,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:09,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:23:09,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:23:09,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:23:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:23:10,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:23:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:23:10,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:23:10,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424206228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:10,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:23:10,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2021-11-23 02:23:10,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250152640] [2021-11-23 02:23:10,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:10,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:23:10,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:10,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:23:10,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:23:10,464 INFO L87 Difference]: Start difference. First operand 2108 states and 3359 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-23 02:23:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:10,850 INFO L93 Difference]: Finished difference Result 4905 states and 7770 transitions. [2021-11-23 02:23:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:23:10,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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 93 [2021-11-23 02:23:10,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:10,880 INFO L225 Difference]: With dead ends: 4905 [2021-11-23 02:23:10,880 INFO L226 Difference]: Without dead ends: 2809 [2021-11-23 02:23:10,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:23:10,897 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 446 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:10,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 1790 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:23:10,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-11-23 02:23:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2765. [2021-11-23 02:23:11,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 1899 states have (on average 1.517114270668773) internal successors, (2881), 1987 states have internal predecessors, (2881), 662 states have call successors, (662), 188 states have call predecessors, (662), 203 states have return successors, (790), 631 states have call predecessors, (790), 656 states have call successors, (790) [2021-11-23 02:23:11,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 4333 transitions. [2021-11-23 02:23:11,109 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 4333 transitions. Word has length 93 [2021-11-23 02:23:11,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:11,109 INFO L470 AbstractCegarLoop]: Abstraction has 2765 states and 4333 transitions. [2021-11-23 02:23:11,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 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) [2021-11-23 02:23:11,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 4333 transitions. [2021-11-23 02:23:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:23:11,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:11,118 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] [2021-11-23 02:23:11,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:23:11,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:11,345 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:11,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1707177976, now seen corresponding path program 1 times [2021-11-23 02:23:11,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:11,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295905878] [2021-11-23 02:23:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:11,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:23:11,495 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:11,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295905878] [2021-11-23 02:23:11,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295905878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:11,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:23:11,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:23:11,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375136121] [2021-11-23 02:23:11,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:11,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:23:11,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:11,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:23:11,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:23:11,500 INFO L87 Difference]: Start difference. First operand 2765 states and 4333 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) [2021-11-23 02:23:12,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:12,600 INFO L93 Difference]: Finished difference Result 7201 states and 11765 transitions. [2021-11-23 02:23:12,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:23:12,601 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 [2021-11-23 02:23:12,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:12,649 INFO L225 Difference]: With dead ends: 7201 [2021-11-23 02:23:12,650 INFO L226 Difference]: Without dead ends: 4448 [2021-11-23 02:23:12,676 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 [2021-11-23 02:23:12,679 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 707 mSDsluCounter, 2913 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 3573 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:12,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 3573 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:23:12,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2021-11-23 02:23:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 4035. [2021-11-23 02:23:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 2777 states have (on average 1.5084623694634498) internal successors, (4189), 2916 states have internal predecessors, (4189), 955 states have call successors, (955), 279 states have call predecessors, (955), 302 states have return successors, (1236), 905 states have call predecessors, (1236), 947 states have call successors, (1236) [2021-11-23 02:23:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 6380 transitions. [2021-11-23 02:23:13,039 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 6380 transitions. Word has length 94 [2021-11-23 02:23:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:13,039 INFO L470 AbstractCegarLoop]: Abstraction has 4035 states and 6380 transitions. [2021-11-23 02:23:13,039 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) [2021-11-23 02:23:13,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 6380 transitions. [2021-11-23 02:23:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:23:13,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:13,048 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] [2021-11-23 02:23:13,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:23:13,048 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1493767023, now seen corresponding path program 1 times [2021-11-23 02:23:13,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:13,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794971658] [2021-11-23 02:23:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:13,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:23:13,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:13,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794971658] [2021-11-23 02:23:13,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794971658] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:23:13,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449854900] [2021-11-23 02:23:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:13,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:13,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:23:13,221 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:23:13,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:23:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:13,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:23:13,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:23:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 02:23:13,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:23:13,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449854900] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:13,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:23:13,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-23 02:23:13,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706767712] [2021-11-23 02:23:13,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:13,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:23:13,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:13,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:23:13,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:23:13,863 INFO L87 Difference]: Start difference. First operand 4035 states and 6380 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) [2021-11-23 02:23:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:14,912 INFO L93 Difference]: Finished difference Result 10586 states and 17287 transitions. [2021-11-23 02:23:14,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:23:14,913 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 [2021-11-23 02:23:14,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:14,981 INFO L225 Difference]: With dead ends: 10586 [2021-11-23 02:23:14,982 INFO L226 Difference]: Without dead ends: 6563 [2021-11-23 02:23:15,082 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 [2021-11-23 02:23:15,084 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 562 mSDsluCounter, 2432 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:15,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 3042 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:23:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2021-11-23 02:23:15,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 6332. [2021-11-23 02:23:15,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6332 states, 4360 states have (on average 1.4697247706422019) internal successors, (6408), 4591 states have internal predecessors, (6408), 1486 states have call successors, (1486), 459 states have call predecessors, (1486), 485 states have return successors, (1983), 1387 states have call predecessors, (1983), 1475 states have call successors, (1983) [2021-11-23 02:23:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6332 states to 6332 states and 9877 transitions. [2021-11-23 02:23:15,573 INFO L78 Accepts]: Start accepts. Automaton has 6332 states and 9877 transitions. Word has length 95 [2021-11-23 02:23:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:15,576 INFO L470 AbstractCegarLoop]: Abstraction has 6332 states and 9877 transitions. [2021-11-23 02:23:15,577 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) [2021-11-23 02:23:15,577 INFO L276 IsEmpty]: Start isEmpty. Operand 6332 states and 9877 transitions. [2021-11-23 02:23:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:23:15,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:15,587 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] [2021-11-23 02:23:15,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:23:15,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:23:15,813 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:15,813 INFO L85 PathProgramCache]: Analyzing trace with hash -513258118, now seen corresponding path program 1 times [2021-11-23 02:23:15,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:15,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206493157] [2021-11-23 02:23:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:15,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:23:15,954 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:15,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206493157] [2021-11-23 02:23:15,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206493157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:23:15,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321683534] [2021-11-23 02:23:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:15,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:15,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:23:15,956 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:23:15,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:23:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:16,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:23:16,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:23:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:23:16,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:23:16,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321683534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:16,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:23:16,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:23:16,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97733154] [2021-11-23 02:23:16,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:16,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:23:16,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:16,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:23:16,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:23:16,559 INFO L87 Difference]: Start difference. First operand 6332 states and 9877 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-11-23 02:23:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:17,049 INFO L93 Difference]: Finished difference Result 14110 states and 22337 transitions. [2021-11-23 02:23:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:23:17,049 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), 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 94 [2021-11-23 02:23:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:17,220 INFO L225 Difference]: With dead ends: 14110 [2021-11-23 02:23:17,222 INFO L226 Difference]: Without dead ends: 7790 [2021-11-23 02:23:17,258 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 [2021-11-23 02:23:17,259 INFO L933 BasicCegarLoop]: 824 mSDtfsCounter, 594 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:17,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 1359 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:23:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-11-23 02:23:17,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 6225. [2021-11-23 02:23:17,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6225 states, 4288 states have (on average 1.4640858208955223) internal successors, (6278), 4517 states have internal predecessors, (6278), 1466 states have call successors, (1466), 450 states have call predecessors, (1466), 470 states have return successors, (1907), 1363 states have call predecessors, (1907), 1455 states have call successors, (1907) [2021-11-23 02:23:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6225 states to 6225 states and 9651 transitions. [2021-11-23 02:23:17,636 INFO L78 Accepts]: Start accepts. Automaton has 6225 states and 9651 transitions. Word has length 94 [2021-11-23 02:23:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:17,636 INFO L470 AbstractCegarLoop]: Abstraction has 6225 states and 9651 transitions. [2021-11-23 02:23:17,637 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), 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) [2021-11-23 02:23:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 6225 states and 9651 transitions. [2021-11-23 02:23:17,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 02:23:17,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:17,642 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] [2021-11-23 02:23:17,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:23:17,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 02:23:17,869 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:17,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:17,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1341273073, now seen corresponding path program 1 times [2021-11-23 02:23:17,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:17,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86983589] [2021-11-23 02:23:17,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:17,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:23:18,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86983589] [2021-11-23 02:23:18,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86983589] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:23:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761667386] [2021-11-23 02:23:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:18,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:23:18,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:23:18,109 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:23:18,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:23:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:18,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:23:18,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:23:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:23:18,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:23:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:23:19,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761667386] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:23:19,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2122780157] [2021-11-23 02:23:19,482 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2021-11-23 02:23:19,482 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:23:19,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:23:19,493 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:23:19,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:23:25,506 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-23 02:23:32,658 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2021-11-23 02:23:33,033 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-23 02:23:35,055 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-23 02:23:35,223 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-23 02:23:35,297 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-23 02:23:35,370 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-23 02:23:39,250 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-23 02:23:39,766 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-23 02:23:39,902 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:24:06,140 WARN L227 SmtUtils]: Spent 5.56s 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) [2021-11-23 02:24:12,055 WARN L227 SmtUtils]: Spent 5.62s 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) [2021-11-23 02:25:21,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2122780157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:21,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:25:21,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2021-11-23 02:25:21,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395205747] [2021-11-23 02:25:21,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:21,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 02:25:21,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:25:21,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 02:25:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 02:25:21,707 INFO L87 Difference]: Start difference. First operand 6225 states and 9651 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) [2021-11-23 02:26:21,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:21,747 INFO L93 Difference]: Finished difference Result 12589 states and 19521 transitions. [2021-11-23 02:26:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 02:26:21,748 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 [2021-11-23 02:26:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:21,793 INFO L225 Difference]: With dead ends: 12589 [2021-11-23 02:26:21,793 INFO L226 Difference]: Without dead ends: 6376 [2021-11-23 02:26:21,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 253 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 129.7s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 02:26:21,822 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 304 mSDsluCounter, 3921 mSDsCounter, 0 mSdLazyCounter, 7564 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 4577 SdHoareTripleChecker+Invalid, 7677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 7564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:21,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 4577 Invalid, 7677 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [113 Valid, 7564 Invalid, 0 Unknown, 0 Unchecked, 31.8s Time] [2021-11-23 02:26:21,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6376 states. [2021-11-23 02:26:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6376 to 6297. [2021-11-23 02:26:22,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6297 states, 4338 states have (on average 1.4603503918856615) internal successors, (6335), 4566 states have internal predecessors, (6335), 1481 states have call successors, (1481), 459 states have call predecessors, (1481), 477 states have return successors, (1923), 1377 states have call predecessors, (1923), 1470 states have call successors, (1923) [2021-11-23 02:26:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6297 states to 6297 states and 9739 transitions. [2021-11-23 02:26:22,339 INFO L78 Accepts]: Start accepts. Automaton has 6297 states and 9739 transitions. Word has length 100 [2021-11-23 02:26:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:22,339 INFO L470 AbstractCegarLoop]: Abstraction has 6297 states and 9739 transitions. [2021-11-23 02:26:22,340 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) [2021-11-23 02:26:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6297 states and 9739 transitions. [2021-11-23 02:26:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 02:26:22,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:22,345 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] [2021-11-23 02:26:22,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:26:22,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:22,573 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:22,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:22,574 INFO L85 PathProgramCache]: Analyzing trace with hash -42572340, now seen corresponding path program 1 times [2021-11-23 02:26:22,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:22,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127579706] [2021-11-23 02:26:22,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:22,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:22,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:26:22,760 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:22,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127579706] [2021-11-23 02:26:22,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127579706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:26:22,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151121581] [2021-11-23 02:26:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:22,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:26:22,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:26:22,765 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:26:22,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:26:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:23,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:26:23,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:26:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:26:23,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:26:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:26:24,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151121581] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:26:24,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016199631] [2021-11-23 02:26:24,042 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2021-11-23 02:26:24,042 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:26:24,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:26:24,043 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:26:24,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:26:28,329 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-23 02:26:36,875 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2021-11-23 02:26:36,890 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-23 02:26:38,824 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-23 02:26:38,993 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-23 02:26:39,127 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-23 02:26:39,204 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-23 02:26:42,513 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-23 02:26:43,127 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-23 02:26:43,264 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:27:09,453 WARN L227 SmtUtils]: Spent 5.82s 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) [2021-11-23 02:27:15,288 WARN L227 SmtUtils]: Spent 5.58s 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) [2021-11-23 02:28:26,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2016199631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:26,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:28:26,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2021-11-23 02:28:26,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110645807] [2021-11-23 02:28:26,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:26,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 02:28:26,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:26,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 02:28:26,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 02:28:26,209 INFO L87 Difference]: Start difference. First operand 6297 states and 9739 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) [2021-11-23 02:29:30,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:30,772 INFO L93 Difference]: Finished difference Result 12567 states and 19482 transitions. [2021-11-23 02:29:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 02:29:30,773 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 [2021-11-23 02:29:30,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:30,812 INFO L225 Difference]: With dead ends: 12567 [2021-11-23 02:29:30,813 INFO L226 Difference]: Without dead ends: 6366 [2021-11-23 02:29:30,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 268 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 129.6s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:29:30,844 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 291 mSDsluCounter, 5712 mSDsCounter, 0 mSdLazyCounter, 9537 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 6337 SdHoareTripleChecker+Invalid, 9640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 9537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:30,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 6337 Invalid, 9640 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [103 Valid, 9537 Invalid, 0 Unknown, 0 Unchecked, 37.4s Time] [2021-11-23 02:29:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2021-11-23 02:29:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 6299. [2021-11-23 02:29:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6299 states, 4339 states have (on average 1.460013828070984) internal successors, (6335), 4567 states have internal predecessors, (6335), 1481 states have call successors, (1481), 460 states have call predecessors, (1481), 478 states have return successors, (1923), 1377 states have call predecessors, (1923), 1470 states have call successors, (1923) [2021-11-23 02:29:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 9739 transitions. [2021-11-23 02:29:31,281 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 9739 transitions. Word has length 106 [2021-11-23 02:29:31,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:31,282 INFO L470 AbstractCegarLoop]: Abstraction has 6299 states and 9739 transitions. [2021-11-23 02:29:31,282 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) [2021-11-23 02:29:31,283 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 9739 transitions. [2021-11-23 02:29:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 02:29:31,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:31,288 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] [2021-11-23 02:29:31,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:31,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:31,513 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:31,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:31,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1189956417, now seen corresponding path program 1 times [2021-11-23 02:29:31,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:31,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006607767] [2021-11-23 02:29:31,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:31,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:29:31,669 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:31,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006607767] [2021-11-23 02:29:31,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006607767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:31,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331602522] [2021-11-23 02:29:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:31,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:31,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:31,672 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:31,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:29:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:32,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:29:32,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:29:32,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:29:32,771 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:29:32,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331602522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:29:32,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [337102085] [2021-11-23 02:29:32,776 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2021-11-23 02:29:32,777 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:29:32,779 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:29:32,779 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:29:32,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:29:36,511 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-23 02:29:46,017 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2021-11-23 02:29:46,194 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-23 02:29:48,051 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-23 02:29:48,220 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-23 02:29:48,294 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-23 02:29:48,369 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-23 02:29:51,663 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-23 02:29:52,175 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-23 02:29:52,313 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:30:18,416 WARN L227 SmtUtils]: Spent 5.62s 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) [2021-11-23 02:30:24,310 WARN L227 SmtUtils]: Spent 5.64s 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) [2021-11-23 02:31:54,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [337102085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:31:54,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:31:54,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2021-11-23 02:31:54,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430658007] [2021-11-23 02:31:54,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:31:54,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 02:31:54,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:31:54,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 02:31:54,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:31:54,440 INFO L87 Difference]: Start difference. First operand 6299 states and 9739 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) [2021-11-23 02:32:20,857 WARN L227 SmtUtils]: Spent 6.42s 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) [2021-11-23 02:32:27,583 WARN L227 SmtUtils]: Spent 6.49s 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) [2021-11-23 02:32:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:32:54,698 INFO L93 Difference]: Finished difference Result 12568 states and 19471 transitions. [2021-11-23 02:32:54,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 02:32:54,699 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 [2021-11-23 02:32:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:32:54,740 INFO L225 Difference]: With dead ends: 12568 [2021-11-23 02:32:54,740 INFO L226 Difference]: Without dead ends: 6367 [2021-11-23 02:32:54,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 282 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 153.5s TimeCoverageRelationStatistics Valid=496, Invalid=2810, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 02:32:54,769 INFO L933 BasicCegarLoop]: 597 mSDtfsCounter, 292 mSDsluCounter, 4565 mSDsCounter, 0 mSdLazyCounter, 7551 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 5083 SdHoareTripleChecker+Invalid, 7662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 7551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:32:54,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 5083 Invalid, 7662 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [111 Valid, 7551 Invalid, 0 Unknown, 0 Unchecked, 28.4s Time] [2021-11-23 02:32:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2021-11-23 02:32:55,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6300. [2021-11-23 02:32:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6300 states, 4340 states have (on average 1.4596774193548387) internal successors, (6335), 4568 states have internal predecessors, (6335), 1480 states have call successors, (1480), 461 states have call predecessors, (1480), 479 states have return successors, (1913), 1376 states have call predecessors, (1913), 1469 states have call successors, (1913) [2021-11-23 02:32:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 9728 transitions. [2021-11-23 02:32:55,192 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 9728 transitions. Word has length 112 [2021-11-23 02:32:55,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:32:55,192 INFO L470 AbstractCegarLoop]: Abstraction has 6300 states and 9728 transitions. [2021-11-23 02:32:55,193 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) [2021-11-23 02:32:55,193 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 9728 transitions. [2021-11-23 02:32:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 02:32:55,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:32:55,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:32:55,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 02:32:55,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:32:55,421 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:32:55,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:32:55,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1095452713, now seen corresponding path program 1 times [2021-11-23 02:32:55,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:32:55,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631259507] [2021-11-23 02:32:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:55,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:32:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:32:55,621 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:32:55,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631259507] [2021-11-23 02:32:55,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631259507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:32:55,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613758810] [2021-11-23 02:32:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:32:55,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:32:55,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:32:55,623 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:32:55,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:32:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:32:56,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:32:56,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:32:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-23 02:32:56,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:32:56,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613758810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:32:56,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:32:56,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2021-11-23 02:32:56,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148081364] [2021-11-23 02:32:56,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:32:56,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:32:56,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:32:56,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:32:56,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:32:56,467 INFO L87 Difference]: Start difference. First operand 6300 states and 9728 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 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) [2021-11-23 02:33:00,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:00,360 INFO L93 Difference]: Finished difference Result 15939 states and 25319 transitions. [2021-11-23 02:33:00,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 02:33:00,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 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 182 [2021-11-23 02:33:00,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:00,434 INFO L225 Difference]: With dead ends: 15939 [2021-11-23 02:33:00,434 INFO L226 Difference]: Without dead ends: 9744 [2021-11-23 02:33:00,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 02:33:00,469 INFO L933 BasicCegarLoop]: 1079 mSDtfsCounter, 1679 mSDsluCounter, 2841 mSDsCounter, 0 mSdLazyCounter, 6263 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1699 SdHoareTripleChecker+Valid, 3721 SdHoareTripleChecker+Invalid, 7104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 6263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:00,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1699 Valid, 3721 Invalid, 7104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 6263 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 02:33:00,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9744 states. [2021-11-23 02:33:01,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9744 to 8733. [2021-11-23 02:33:01,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8733 states, 5998 states have (on average 1.444648216072024) internal successors, (8665), 6272 states have internal predecessors, (8665), 2032 states have call successors, (2032), 703 states have call predecessors, (2032), 702 states have return successors, (2712), 1897 states have call predecessors, (2712), 2013 states have call successors, (2712) [2021-11-23 02:33:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8733 states to 8733 states and 13409 transitions. [2021-11-23 02:33:01,107 INFO L78 Accepts]: Start accepts. Automaton has 8733 states and 13409 transitions. Word has length 182 [2021-11-23 02:33:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:01,108 INFO L470 AbstractCegarLoop]: Abstraction has 8733 states and 13409 transitions. [2021-11-23 02:33:01,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 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) [2021-11-23 02:33:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 8733 states and 13409 transitions. [2021-11-23 02:33:01,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 02:33:01,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:01,124 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] [2021-11-23 02:33:01,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:33:01,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 02:33:01,337 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:01,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:01,337 INFO L85 PathProgramCache]: Analyzing trace with hash 133265698, now seen corresponding path program 1 times [2021-11-23 02:33:01,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:01,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472803890] [2021-11-23 02:33:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:01,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:01,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:33:01,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:01,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472803890] [2021-11-23 02:33:01,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472803890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:01,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585986791] [2021-11-23 02:33:01,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:01,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:01,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:01,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:33:01,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:33:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:01,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:33:01,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 02:33:02,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:33:02,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585986791] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:02,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:33:02,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-11-23 02:33:02,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161148849] [2021-11-23 02:33:02,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:02,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:33:02,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:02,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:33:02,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:33:02,132 INFO L87 Difference]: Start difference. First operand 8733 states and 13409 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:33:02,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:02,691 INFO L93 Difference]: Finished difference Result 15691 states and 24635 transitions. [2021-11-23 02:33:02,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:33:02,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 182 [2021-11-23 02:33:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:02,754 INFO L225 Difference]: With dead ends: 15691 [2021-11-23 02:33:02,754 INFO L226 Difference]: Without dead ends: 9064 [2021-11-23 02:33:02,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:33:02,796 INFO L933 BasicCegarLoop]: 651 mSDtfsCounter, 33 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:02,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1256 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:33:02,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2021-11-23 02:33:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 8817. [2021-11-23 02:33:03,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8817 states, 6070 states have (on average 1.4413509060955518) internal successors, (8749), 6344 states have internal predecessors, (8749), 2044 states have call successors, (2044), 703 states have call predecessors, (2044), 702 states have return successors, (2724), 1909 states have call predecessors, (2724), 2025 states have call successors, (2724) [2021-11-23 02:33:03,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8817 states to 8817 states and 13517 transitions. [2021-11-23 02:33:03,366 INFO L78 Accepts]: Start accepts. Automaton has 8817 states and 13517 transitions. Word has length 182 [2021-11-23 02:33:03,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:03,367 INFO L470 AbstractCegarLoop]: Abstraction has 8817 states and 13517 transitions. [2021-11-23 02:33:03,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:33:03,368 INFO L276 IsEmpty]: Start isEmpty. Operand 8817 states and 13517 transitions. [2021-11-23 02:33:03,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-23 02:33:03,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:03,382 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] [2021-11-23 02:33:03,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:33:03,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:03,609 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:03,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:03,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1778481971, now seen corresponding path program 1 times [2021-11-23 02:33:03,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:03,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44404224] [2021-11-23 02:33:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:03,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:03,774 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:33:03,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:03,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44404224] [2021-11-23 02:33:03,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44404224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:33:03,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470106935] [2021-11-23 02:33:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:03,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:33:03,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:03,777 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:33:03,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8f441fa5-ffe1-460a-91a4-ceeda35d72f1/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:33:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:04,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:33:04,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:33:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 93 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:33:04,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:33:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:33:05,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470106935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:33:05,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1783325058] [2021-11-23 02:33:05,475 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2021-11-23 02:33:05,475 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:33:05,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:33:05,476 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:33:05,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:33:12,897 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs [2021-11-23 02:33:22,347 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 53 for LOIs [2021-11-23 02:33:23,366 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 58 for LOIs [2021-11-23 02:33:23,885 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 61 for LOIs [2021-11-23 02:33:23,999 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 63 for LOIs [2021-11-23 02:33:24,028 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 28 for LOIs [2021-11-23 02:33:24,032 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 57 for LOIs [2021-11-23 02:33:24,059 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-23 02:33:26,003 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-23 02:33:26,176 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 27 for LOIs [2021-11-23 02:33:26,179 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 85 for LOIs [2021-11-23 02:33:26,420 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 78 for LOIs [2021-11-23 02:33:26,432 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 53 for LOIs [2021-11-23 02:33:26,445 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-23 02:33:29,894 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-23 02:33:30,402 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-23 02:33:30,540 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:33:57,057 WARN L227 SmtUtils]: Spent 5.69s 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) [2021-11-23 02:34:03,154 WARN L227 SmtUtils]: Spent 5.82s 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) [2021-11-23 02:34:21,677 WARN L227 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 683 DAG size of output: 568 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)