./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/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_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:06:03,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:06:03,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:06:03,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:06:03,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:06:03,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:06:03,359 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:06:03,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:06:03,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:06:03,370 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:06:03,371 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:06:03,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:06:03,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:06:03,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:06:03,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:06:03,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:06:03,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:06:03,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:06:03,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:06:03,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:06:03,397 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:06:03,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:06:03,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:06:03,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:06:03,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:06:03,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:06:03,411 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:06:03,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:06:03,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:06:03,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:06:03,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:06:03,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:06:03,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:06:03,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:06:03,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:06:03,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:06:03,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:06:03,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:06:03,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:06:03,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:06:03,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:06:03,426 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:06:03,466 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:06:03,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:06:03,468 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:06:03,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:06:03,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:06:03,469 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:06:03,470 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:06:03,470 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:06:03,470 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:06:03,470 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:06:03,471 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:06:03,472 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:06:03,472 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:06:03,472 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:06:03,473 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:06:03,473 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:06:03,473 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:06:03,473 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:06:03,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:06:03,475 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:06:03,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:06:03,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:06:03,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:06:03,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:06:03,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:06:03,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:06:03,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:06:03,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:06:03,478 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:06:03,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:06:03,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:06:03,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:06:03,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:06:03,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:06:03,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:06:03,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:06:03,481 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:06:03,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:06:03,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:06:03,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:06:03,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:06:03,482 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_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d14be9b096a9cbd7bae6b76d9713e8ec6e66d6633cec6a9d1cec5445761f8a9c [2021-11-25 19:06:03,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:06:03,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:06:03,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:06:03,837 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:06:03,838 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:06:03,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2021-11-25 19:06:03,919 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/data/5c7ed52f4/5cc36cbaf1e747499f0c9f64367d8156/FLAG74f7fe13b [2021-11-25 19:06:04,543 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:06:04,544 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c [2021-11-25 19:06:04,570 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/data/5c7ed52f4/5cc36cbaf1e747499f0c9f64367d8156/FLAG74f7fe13b [2021-11-25 19:06:04,893 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/data/5c7ed52f4/5cc36cbaf1e747499f0c9f64367d8156 [2021-11-25 19:06:04,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:06:04,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:06:04,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:06:04,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:06:04,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:06:04,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:06:04" (1/1) ... [2021-11-25 19:06:04,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44647ac8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:04, skipping insertion in model container [2021-11-25 19:06:04,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:06:04" (1/1) ... [2021-11-25 19:06:04,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:06:04,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:06:05,225 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_8b3d5738-5db6-47a4-bfa6-09986d2da48f/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2021-11-25 19:06:05,606 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:06:05,621 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:06:05,652 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_8b3d5738-5db6-47a4-bfa6-09986d2da48f/sv-benchmarks/c/product-lines/elevator_spec3_product32.cil.c[3233,3246] [2021-11-25 19:06:05,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:06:05,840 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:06:05,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:05 WrapperNode [2021-11-25 19:06:05,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:06:05,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:06:05,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:06:05,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:06:05,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:05" (1/1) ... [2021-11-25 19:06:05,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:05" (1/1) ... [2021-11-25 19:06:05,960 INFO L137 Inliner]: procedures = 97, calls = 361, calls flagged for inlining = 29, calls inlined = 25, statements flattened = 1010 [2021-11-25 19:06:05,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:06:05,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:06:05,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:06:05,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:06:05,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:05" (1/1) ... [2021-11-25 19:06:05,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:05" (1/1) ... [2021-11-25 19:06:05,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:05" (1/1) ... [2021-11-25 19:06:05,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:05" (1/1) ... [2021-11-25 19:06:05,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:05" (1/1) ... [2021-11-25 19:06:06,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:05" (1/1) ... [2021-11-25 19:06:06,022 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:05" (1/1) ... [2021-11-25 19:06:06,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:06:06,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:06:06,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:06:06,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:06:06,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:05" (1/1) ... [2021-11-25 19:06:06,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:06:06,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:06,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:06:06,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:06:06,141 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-25 19:06:06,141 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-25 19:06:06,141 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 19:06:06,141 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 19:06:06,141 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 19:06:06,142 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 19:06:06,142 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-25 19:06:06,142 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-25 19:06:06,142 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 19:06:06,142 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 19:06:06,142 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 19:06:06,143 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 19:06:06,143 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 19:06:06,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 19:06:06,143 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 19:06:06,143 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 19:06:06,143 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 19:06:06,144 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 19:06:06,144 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 19:06:06,144 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 19:06:06,144 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 19:06:06,144 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 19:06:06,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:06:06,145 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 19:06:06,145 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-25 19:06:06,145 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 19:06:06,145 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 19:06:06,145 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 19:06:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 19:06:06,146 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 19:06:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 19:06:06,146 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 19:06:06,146 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 19:06:06,146 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 19:06:06,147 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 19:06:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 19:06:06,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 19:06:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 19:06:06,147 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 19:06:06,147 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-25 19:06:06,148 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-25 19:06:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 19:06:06,148 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 19:06:06,148 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-25 19:06:06,149 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-25 19:06:06,149 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 19:06:06,150 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 19:06:06,150 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 19:06:06,151 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 19:06:06,151 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 19:06:06,152 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 19:06:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 19:06:06,152 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 19:06:06,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:06:06,153 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 19:06:06,153 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 19:06:06,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:06:06,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:06:06,154 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 19:06:06,154 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 19:06:06,154 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-25 19:06:06,154 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-25 19:06:06,340 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:06:06,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:06:07,598 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:06:08,232 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:06:08,232 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:06:08,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:06:08 BoogieIcfgContainer [2021-11-25 19:06:08,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:06:08,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:06:08,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:06:08,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:06:08,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:06:04" (1/3) ... [2021-11-25 19:06:08,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5081a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:06:08, skipping insertion in model container [2021-11-25 19:06:08,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:06:05" (2/3) ... [2021-11-25 19:06:08,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5081a44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:06:08, skipping insertion in model container [2021-11-25 19:06:08,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:06:08" (3/3) ... [2021-11-25 19:06:08,247 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product32.cil.c [2021-11-25 19:06:08,255 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:06:08,255 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:06:08,322 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:06:08,331 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:06:08,332 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:06:08,368 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) [2021-11-25 19:06:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:06:08,377 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:08,378 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:08,378 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:08,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:08,383 INFO L85 PathProgramCache]: Analyzing trace with hash -176782080, now seen corresponding path program 1 times [2021-11-25 19:06:08,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:08,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363109095] [2021-11-25 19:06:08,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:08,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:06:08,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:08,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363109095] [2021-11-25 19:06:08,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363109095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:08,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246962338] [2021-11-25 19:06:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:08,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:08,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:08,894 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:08,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:06:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:09,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:06:09,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:09,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:06:09,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246962338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:09,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:06:09,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 19:06:09,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426608052] [2021-11-25 19:06:09,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:09,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:06:09,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:06:09,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:06:09,474 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) [2021-11-25 19:06:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:09,826 INFO L93 Difference]: Finished difference Result 1225 states and 1938 transitions. [2021-11-25 19:06:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:06:09,828 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 [2021-11-25 19:06:09,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:09,880 INFO L225 Difference]: With dead ends: 1225 [2021-11-25 19:06:09,884 INFO L226 Difference]: Without dead ends: 793 [2021-11-25 19:06:09,892 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 [2021-11-25 19:06:09,896 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 578 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-11-25 19:06:09,897 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] [2021-11-25 19:06:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-11-25 19:06:10,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 781. [2021-11-25 19:06:10,015 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) [2021-11-25 19:06:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1221 transitions. [2021-11-25 19:06:10,029 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1221 transitions. Word has length 50 [2021-11-25 19:06:10,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:10,030 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1221 transitions. [2021-11-25 19:06:10,031 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) [2021-11-25 19:06:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1221 transitions. [2021-11-25 19:06:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 19:06:10,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:10,041 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] [2021-11-25 19:06:10,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:10,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-25 19:06:10,256 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:10,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:10,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1180145387, now seen corresponding path program 1 times [2021-11-25 19:06:10,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:10,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21275394] [2021-11-25 19:06:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:10,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:06:10,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:10,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21275394] [2021-11-25 19:06:10,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21275394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:10,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886150505] [2021-11-25 19:06:10,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:10,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:10,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:10,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:10,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:06:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:10,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:06:10,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:06:10,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:06:10,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886150505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:10,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:06:10,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 19:06:10,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878550884] [2021-11-25 19:06:10,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:10,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:06:10,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:10,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:06:10,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:06:10,876 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) [2021-11-25 19:06:11,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:11,115 INFO L93 Difference]: Finished difference Result 1915 states and 3024 transitions. [2021-11-25 19:06:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:06:11,116 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 [2021-11-25 19:06:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:11,131 INFO L225 Difference]: With dead ends: 1915 [2021-11-25 19:06:11,132 INFO L226 Difference]: Without dead ends: 1146 [2021-11-25 19:06:11,137 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 [2021-11-25 19:06:11,139 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:11,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1615 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:06:11,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-11-25 19:06:11,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1122. [2021-11-25 19:06:11,231 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) [2021-11-25 19:06:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1764 transitions. [2021-11-25 19:06:11,259 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1764 transitions. Word has length 49 [2021-11-25 19:06:11,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:11,260 INFO L470 AbstractCegarLoop]: Abstraction has 1122 states and 1764 transitions. [2021-11-25 19:06:11,260 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) [2021-11-25 19:06:11,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1764 transitions. [2021-11-25 19:06:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:06:11,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:11,263 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:11,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:11,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:11,488 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:11,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:11,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1524168596, now seen corresponding path program 1 times [2021-11-25 19:06:11,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:11,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169346968] [2021-11-25 19:06:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:11,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:06:11,599 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:11,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169346968] [2021-11-25 19:06:11,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169346968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:11,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:06:11,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:06:11,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374101213] [2021-11-25 19:06:11,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:11,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:06:11,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:06:11,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:06:11,602 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) [2021-11-25 19:06:11,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:11,959 INFO L93 Difference]: Finished difference Result 3336 states and 5296 transitions. [2021-11-25 19:06:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:06:11,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2021-11-25 19:06:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:11,984 INFO L225 Difference]: With dead ends: 3336 [2021-11-25 19:06:11,984 INFO L226 Difference]: Without dead ends: 2226 [2021-11-25 19:06:11,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:06:11,997 INFO L933 BasicCegarLoop]: 777 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, 1388 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 [2021-11-25 19:06:11,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1388 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:06:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-11-25 19:06:12,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 2108. [2021-11-25 19:06:12,130 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) [2021-11-25 19:06:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3359 transitions. [2021-11-25 19:06:12,160 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3359 transitions. Word has length 50 [2021-11-25 19:06:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:12,162 INFO L470 AbstractCegarLoop]: Abstraction has 2108 states and 3359 transitions. [2021-11-25 19:06:12,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-25 19:06:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3359 transitions. [2021-11-25 19:06:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 19:06:12,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:12,173 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:12,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:06:12,174 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:12,174 INFO L85 PathProgramCache]: Analyzing trace with hash -470509726, now seen corresponding path program 1 times [2021-11-25 19:06:12,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:12,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620893533] [2021-11-25 19:06:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:12,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:06:12,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:12,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620893533] [2021-11-25 19:06:12,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620893533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:12,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27078105] [2021-11-25 19:06:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:12,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:12,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:12,359 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:12,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:06:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:12,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1821 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:06:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:06:12,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:06:12,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27078105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:12,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:06:12,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2021-11-25 19:06:12,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680250413] [2021-11-25 19:06:12,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:12,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:06:12,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:12,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:06:12,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:06:12,965 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) [2021-11-25 19:06:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:13,287 INFO L93 Difference]: Finished difference Result 4905 states and 7770 transitions. [2021-11-25 19:06:13,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:06:13,288 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 [2021-11-25 19:06:13,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:13,314 INFO L225 Difference]: With dead ends: 4905 [2021-11-25 19:06:13,315 INFO L226 Difference]: Without dead ends: 2809 [2021-11-25 19:06:13,329 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 [2021-11-25 19:06:13,331 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 446 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1786 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 [2021-11-25 19:06:13,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 1786 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:06:13,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-11-25 19:06:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 2765. [2021-11-25 19:06:13,498 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) [2021-11-25 19:06:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 4333 transitions. [2021-11-25 19:06:13,524 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 4333 transitions. Word has length 93 [2021-11-25 19:06:13,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:13,526 INFO L470 AbstractCegarLoop]: Abstraction has 2765 states and 4333 transitions. [2021-11-25 19:06:13,526 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) [2021-11-25 19:06:13,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 4333 transitions. [2021-11-25 19:06:13,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 19:06:13,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:13,535 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:13,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:13,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:13,756 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:13,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:13,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1707177976, now seen corresponding path program 1 times [2021-11-25 19:06:13,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:13,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160839273] [2021-11-25 19:06:13,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:13,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:06:13,901 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:13,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160839273] [2021-11-25 19:06:13,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160839273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:13,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:06:13,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:06:13,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715184017] [2021-11-25 19:06:13,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:13,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:06:13,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:13,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:06:13,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:06:13,904 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) [2021-11-25 19:06:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:14,936 INFO L93 Difference]: Finished difference Result 7201 states and 11765 transitions. [2021-11-25 19:06:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:06:14,936 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2021-11-25 19:06:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:14,973 INFO L225 Difference]: With dead ends: 7201 [2021-11-25 19:06:14,973 INFO L226 Difference]: Without dead ends: 4448 [2021-11-25 19:06:14,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:06:14,996 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 707 mSDsluCounter, 2909 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:14,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 3567 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:06:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4448 states. [2021-11-25 19:06:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4448 to 4035. [2021-11-25 19:06:15,254 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) [2021-11-25 19:06:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 6380 transitions. [2021-11-25 19:06:15,282 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 6380 transitions. Word has length 94 [2021-11-25 19:06:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:15,283 INFO L470 AbstractCegarLoop]: Abstraction has 4035 states and 6380 transitions. [2021-11-25 19:06:15,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 19:06:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 6380 transitions. [2021-11-25 19:06:15,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 19:06:15,290 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:15,290 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:15,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:06:15,291 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:15,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1493767023, now seen corresponding path program 1 times [2021-11-25 19:06:15,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:15,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659143771] [2021-11-25 19:06:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:15,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:06:15,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:15,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659143771] [2021-11-25 19:06:15,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659143771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:15,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739062532] [2021-11-25 19:06:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:15,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:15,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:15,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:15,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:06:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:15,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1823 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:06:15,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:06:16,000 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:06:16,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739062532] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:16,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:06:16,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-25 19:06:16,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150819968] [2021-11-25 19:06:16,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:16,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:06:16,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:16,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:06:16,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:06:16,003 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) [2021-11-25 19:06:17,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:17,055 INFO L93 Difference]: Finished difference Result 10586 states and 17287 transitions. [2021-11-25 19:06:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:06:17,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 95 [2021-11-25 19:06:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:17,113 INFO L225 Difference]: With dead ends: 10586 [2021-11-25 19:06:17,113 INFO L226 Difference]: Without dead ends: 6563 [2021-11-25 19:06:17,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:06:17,154 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 562 mSDsluCounter, 2432 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:17,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 3042 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:06:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2021-11-25 19:06:17,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 6332. [2021-11-25 19:06:17,646 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) [2021-11-25 19:06:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6332 states to 6332 states and 9877 transitions. [2021-11-25 19:06:17,698 INFO L78 Accepts]: Start accepts. Automaton has 6332 states and 9877 transitions. Word has length 95 [2021-11-25 19:06:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:17,699 INFO L470 AbstractCegarLoop]: Abstraction has 6332 states and 9877 transitions. [2021-11-25 19:06:17,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 4 states have call successors, (19), 3 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-25 19:06:17,700 INFO L276 IsEmpty]: Start isEmpty. Operand 6332 states and 9877 transitions. [2021-11-25 19:06:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 19:06:17,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:17,709 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:17,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:17,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:06:17,926 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:17,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:17,927 INFO L85 PathProgramCache]: Analyzing trace with hash -513258118, now seen corresponding path program 1 times [2021-11-25 19:06:17,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:17,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434136891] [2021-11-25 19:06:17,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:17,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:06:18,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:18,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434136891] [2021-11-25 19:06:18,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434136891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:18,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046349097] [2021-11-25 19:06:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:18,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:18,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:18,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:18,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:06:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:18,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:06:18,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:06:18,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:06:18,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046349097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:18,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:06:18,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 19:06:18,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033676905] [2021-11-25 19:06:18,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:18,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:06:18,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:06:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:06:18,617 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) [2021-11-25 19:06:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:19,149 INFO L93 Difference]: Finished difference Result 14110 states and 22337 transitions. [2021-11-25 19:06:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:06:19,150 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 [2021-11-25 19:06:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:19,226 INFO L225 Difference]: With dead ends: 14110 [2021-11-25 19:06:19,226 INFO L226 Difference]: Without dead ends: 7790 [2021-11-25 19:06:19,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:06:19,265 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 [2021-11-25 19:06:19,266 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] [2021-11-25 19:06:19,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-11-25 19:06:19,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 6225. [2021-11-25 19:06:19,729 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) [2021-11-25 19:06:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6225 states to 6225 states and 9651 transitions. [2021-11-25 19:06:19,785 INFO L78 Accepts]: Start accepts. Automaton has 6225 states and 9651 transitions. Word has length 94 [2021-11-25 19:06:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:19,786 INFO L470 AbstractCegarLoop]: Abstraction has 6225 states and 9651 transitions. [2021-11-25 19:06:19,786 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) [2021-11-25 19:06:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 6225 states and 9651 transitions. [2021-11-25 19:06:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-25 19:06:19,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:19,792 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:06:19,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:20,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:20,020 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:20,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:20,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1341273073, now seen corresponding path program 1 times [2021-11-25 19:06:20,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:20,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470612216] [2021-11-25 19:06:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:20,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:06:20,211 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:20,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470612216] [2021-11-25 19:06:20,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470612216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:20,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430605477] [2021-11-25 19:06:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:20,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:20,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:20,214 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:20,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:06:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:20,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:06:20,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:21,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 19:06:21,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:06:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 19:06:21,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430605477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:06:21,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [194405890] [2021-11-25 19:06:21,602 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2021-11-25 19:06:21,602 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:06:21,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:06:21,613 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:06:21,613 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:06:27,235 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-25 19:06:34,167 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2021-11-25 19:06:34,481 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-25 19:06:36,500 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-25 19:06:36,743 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-25 19:06:36,869 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-25 19:06:36,981 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-25 19:06:40,797 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-25 19:06:41,394 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-25 19:06:41,531 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:07:07,459 WARN L227 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:07:13,247 WARN L227 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:08:21,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [194405890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:08:21,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:08:21,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2021-11-25 19:08:21,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182862741] [2021-11-25 19:08:21,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:08:21,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-25 19:08:21,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:08:21,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-25 19:08:21,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 19:08:21,168 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) [2021-11-25 19:09:18,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:09:18,849 INFO L93 Difference]: Finished difference Result 12589 states and 19521 transitions. [2021-11-25 19:09:18,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 19:09:18,851 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2021-11-25 19:09:18,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:09:18,892 INFO L225 Difference]: With dead ends: 12589 [2021-11-25 19:09:18,892 INFO L226 Difference]: Without dead ends: 6376 [2021-11-25 19:09:18,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 253 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 127.1s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 19:09:18,918 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 304 mSDsluCounter, 3921 mSDsCounter, 0 mSdLazyCounter, 7564 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.7s 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, 29.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:09:18,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 4577 Invalid, 7677 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [113 Valid, 7564 Invalid, 0 Unknown, 0 Unchecked, 29.9s Time] [2021-11-25 19:09:18,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6376 states. [2021-11-25 19:09:19,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6376 to 6297. [2021-11-25 19:09:19,315 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) [2021-11-25 19:09:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6297 states to 6297 states and 9739 transitions. [2021-11-25 19:09:19,355 INFO L78 Accepts]: Start accepts. Automaton has 6297 states and 9739 transitions. Word has length 100 [2021-11-25 19:09:19,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:09:19,356 INFO L470 AbstractCegarLoop]: Abstraction has 6297 states and 9739 transitions. [2021-11-25 19:09:19,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2021-11-25 19:09:19,356 INFO L276 IsEmpty]: Start isEmpty. Operand 6297 states and 9739 transitions. [2021-11-25 19:09:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-25 19:09:19,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:09:19,361 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:09:19,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:09:19,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:09:19,587 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:09:19,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:09:19,588 INFO L85 PathProgramCache]: Analyzing trace with hash -42572340, now seen corresponding path program 1 times [2021-11-25 19:09:19,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:09:19,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60854824] [2021-11-25 19:09:19,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:19,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:09:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 19:09:19,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:09:19,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60854824] [2021-11-25 19:09:19,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60854824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:09:19,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213802470] [2021-11-25 19:09:19,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:09:19,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:09:19,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:09:19,786 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:09:19,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:09:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:09:20,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:09:20,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:09:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:09:20,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:09:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 19:09:20,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213802470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:09:20,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [747615281] [2021-11-25 19:09:20,969 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2021-11-25 19:09:20,970 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:09:20,970 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:09:20,970 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:09:20,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:09:25,039 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-25 19:09:33,585 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2021-11-25 19:09:33,600 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-25 19:09:35,566 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-25 19:09:35,780 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-25 19:09:35,853 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-25 19:09:35,928 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-25 19:09:39,187 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-25 19:09:39,773 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-25 19:09:39,910 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:10:05,841 WARN L227 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:10:11,608 WARN L227 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:11:20,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [747615281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:20,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:11:20,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2021-11-25 19:11:20,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343694206] [2021-11-25 19:11:20,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:20,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-25 19:11:20,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:11:20,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-25 19:11:20,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 19:11:20,858 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) [2021-11-25 19:12:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:12:21,651 INFO L93 Difference]: Finished difference Result 12567 states and 19482 transitions. [2021-11-25 19:12:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-25 19:12:21,652 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 106 [2021-11-25 19:12:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:12:21,690 INFO L225 Difference]: With dead ends: 12567 [2021-11-25 19:12:21,690 INFO L226 Difference]: Without dead ends: 6366 [2021-11-25 19:12:21,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 268 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 127.3s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 19:12:21,719 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 291 mSDsluCounter, 5712 mSDsCounter, 0 mSdLazyCounter, 9537 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.7s 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, 34.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:12:21,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 6337 Invalid, 9640 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [103 Valid, 9537 Invalid, 0 Unknown, 0 Unchecked, 34.1s Time] [2021-11-25 19:12:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6366 states. [2021-11-25 19:12:22,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6366 to 6299. [2021-11-25 19:12:22,133 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) [2021-11-25 19:12:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 9739 transitions. [2021-11-25 19:12:22,172 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 9739 transitions. Word has length 106 [2021-11-25 19:12:22,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:12:22,173 INFO L470 AbstractCegarLoop]: Abstraction has 6299 states and 9739 transitions. [2021-11-25 19:12:22,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2021-11-25 19:12:22,173 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 9739 transitions. [2021-11-25 19:12:22,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-25 19:12:22,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:12:22,177 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:12:22,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:12:22,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:22,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:12:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:12:22,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1189956417, now seen corresponding path program 1 times [2021-11-25 19:12:22,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:12:22,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130748258] [2021-11-25 19:12:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:22,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:12:22,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 19:12:22,542 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:12:22,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130748258] [2021-11-25 19:12:22,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130748258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:12:22,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840824278] [2021-11-25 19:12:22,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:12:22,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:12:22,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:12:22,545 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:12:22,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:12:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:12:22,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:12:22,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:12:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-25 19:12:23,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:12:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 19:12:23,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840824278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:12:23,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043191562] [2021-11-25 19:12:23,728 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2021-11-25 19:12:23,728 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:12:23,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:12:23,730 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:12:23,730 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:12:27,345 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-25 19:12:36,677 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2021-11-25 19:12:36,850 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-25 19:12:38,648 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-25 19:12:38,814 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-25 19:12:38,887 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-25 19:12:38,961 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-25 19:12:42,240 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-25 19:12:42,743 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-25 19:12:42,879 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:13:08,160 WARN L227 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:13:13,889 WARN L227 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:14:41,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1043191562] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:14:41,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:14:41,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2021-11-25 19:14:41,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319431435] [2021-11-25 19:14:41,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:14:41,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 19:14:41,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:14:41,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 19:14:41,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 19:14:41,349 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) [2021-11-25 19:15:07,974 WARN L227 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 609 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:15:14,887 WARN L227 SmtUtils]: Spent 6.67s on a formula simplification. DAG size of input: 615 DAG size of output: 595 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:15:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:42,871 INFO L93 Difference]: Finished difference Result 12568 states and 19471 transitions. [2021-11-25 19:15:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-25 19:15:42,872 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 112 [2021-11-25 19:15:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:42,912 INFO L225 Difference]: With dead ends: 12568 [2021-11-25 19:15:42,912 INFO L226 Difference]: Without dead ends: 6367 [2021-11-25 19:15:42,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 282 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 150.3s TimeCoverageRelationStatistics Valid=496, Invalid=2810, Unknown=0, NotChecked=0, Total=3306 [2021-11-25 19:15:42,941 INFO L933 BasicCegarLoop]: 597 mSDtfsCounter, 292 mSDsluCounter, 4565 mSDsCounter, 0 mSdLazyCounter, 7551 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.1s 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, 29.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:42,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 5083 Invalid, 7662 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [111 Valid, 7551 Invalid, 0 Unknown, 0 Unchecked, 29.3s Time] [2021-11-25 19:15:42,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2021-11-25 19:15:43,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6300. [2021-11-25 19:15:43,347 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) [2021-11-25 19:15:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6300 states to 6300 states and 9728 transitions. [2021-11-25 19:15:43,391 INFO L78 Accepts]: Start accepts. Automaton has 6300 states and 9728 transitions. Word has length 112 [2021-11-25 19:15:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:43,392 INFO L470 AbstractCegarLoop]: Abstraction has 6300 states and 9728 transitions. [2021-11-25 19:15:43,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-25 19:15:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6300 states and 9728 transitions. [2021-11-25 19:15:43,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-25 19:15:43,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:43,406 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] [2021-11-25 19:15:43,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:43,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:15:43,623 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1095452713, now seen corresponding path program 1 times [2021-11-25 19:15:43,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:15:43,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282155830] [2021-11-25 19:15:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:43,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:15:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 19:15:43,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:15:43,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282155830] [2021-11-25 19:15:43,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282155830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:15:43,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557091454] [2021-11-25 19:15:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:43,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:43,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:43,831 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:43,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:15:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:44,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:15:44,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-25 19:15:44,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:15:44,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557091454] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:15:44,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:15:44,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2021-11-25 19:15:44,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764377006] [2021-11-25 19:15:44,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:15:44,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:15:44,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:15:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:15:44,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-11-25 19:15:44,508 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) [2021-11-25 19:15:48,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:48,493 INFO L93 Difference]: Finished difference Result 15939 states and 25319 transitions. [2021-11-25 19:15:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 19:15:48,493 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 [2021-11-25 19:15:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:48,565 INFO L225 Difference]: With dead ends: 15939 [2021-11-25 19:15:48,565 INFO L226 Difference]: Without dead ends: 9744 [2021-11-25 19:15:48,609 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 [2021-11-25 19:15:48,610 INFO L933 BasicCegarLoop]: 1079 mSDtfsCounter, 1679 mSDsluCounter, 2841 mSDsCounter, 0 mSdLazyCounter, 6263 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s 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, 3.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:15:48,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1699 Valid, 3721 Invalid, 7104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 6263 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-25 19:15:48,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9744 states. [2021-11-25 19:15:49,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9744 to 8733. [2021-11-25 19:15:49,205 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) [2021-11-25 19:15:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8733 states to 8733 states and 13409 transitions. [2021-11-25 19:15:49,269 INFO L78 Accepts]: Start accepts. Automaton has 8733 states and 13409 transitions. Word has length 182 [2021-11-25 19:15:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:49,270 INFO L470 AbstractCegarLoop]: Abstraction has 8733 states and 13409 transitions. [2021-11-25 19:15:49,270 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) [2021-11-25 19:15:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 8733 states and 13409 transitions. [2021-11-25 19:15:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-25 19:15:49,284 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:49,285 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] [2021-11-25 19:15:49,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:49,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:49,499 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:49,500 INFO L85 PathProgramCache]: Analyzing trace with hash 133265698, now seen corresponding path program 1 times [2021-11-25 19:15:49,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:15:49,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698849305] [2021-11-25 19:15:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:49,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:15:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 19:15:49,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:15:49,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698849305] [2021-11-25 19:15:49,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698849305] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:15:49,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401111269] [2021-11-25 19:15:49,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:49,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:49,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:49,668 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:49,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:15:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:50,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:15:50,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-25 19:15:50,315 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:15:50,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401111269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:15:50,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:15:50,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-11-25 19:15:50,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036082822] [2021-11-25 19:15:50,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:15:50,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:15:50,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:15:50,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:15:50,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:15:50,320 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) [2021-11-25 19:15:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:15:50,903 INFO L93 Difference]: Finished difference Result 15691 states and 24635 transitions. [2021-11-25 19:15:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:15:50,904 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 [2021-11-25 19:15:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:15:50,966 INFO L225 Difference]: With dead ends: 15691 [2021-11-25 19:15:50,966 INFO L226 Difference]: Without dead ends: 9064 [2021-11-25 19:15:51,008 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 [2021-11-25 19:15:51,009 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 [2021-11-25 19:15:51,009 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] [2021-11-25 19:15:51,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9064 states. [2021-11-25 19:15:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9064 to 8817. [2021-11-25 19:15:51,702 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) [2021-11-25 19:15:51,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8817 states to 8817 states and 13517 transitions. [2021-11-25 19:15:51,768 INFO L78 Accepts]: Start accepts. Automaton has 8817 states and 13517 transitions. Word has length 182 [2021-11-25 19:15:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:15:51,769 INFO L470 AbstractCegarLoop]: Abstraction has 8817 states and 13517 transitions. [2021-11-25 19:15:51,769 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) [2021-11-25 19:15:51,770 INFO L276 IsEmpty]: Start isEmpty. Operand 8817 states and 13517 transitions. [2021-11-25 19:15:51,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-25 19:15:51,785 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:15:51,785 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:15:51,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:15:52,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:15:52,011 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:15:52,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:15:52,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1778481971, now seen corresponding path program 1 times [2021-11-25 19:15:52,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:15:52,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492732371] [2021-11-25 19:15:52,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:52,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:15:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 19:15:52,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:15:52,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492732371] [2021-11-25 19:15:52,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492732371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:15:52,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055185527] [2021-11-25 19:15:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:15:52,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:15:52,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:15:52,180 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:15:52,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b3d5738-5db6-47a4-bfa6-09986d2da48f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:15:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:15:52,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:15:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:15:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 93 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 19:15:53,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:15:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-25 19:15:53,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055185527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:15:53,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [761166782] [2021-11-25 19:15:53,896 INFO L159 IcfgInterpreter]: Started Sifa with 109 locations of interest [2021-11-25 19:15:53,896 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:15:53,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:15:53,898 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:15:53,898 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:16:01,258 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 683 for LOIs [2021-11-25 19:16:11,197 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 53 for LOIs [2021-11-25 19:16:12,297 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 58 for LOIs [2021-11-25 19:16:12,778 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 61 for LOIs [2021-11-25 19:16:12,917 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 63 for LOIs [2021-11-25 19:16:12,944 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 28 for LOIs [2021-11-25 19:16:12,947 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 57 for LOIs [2021-11-25 19:16:12,976 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-25 19:16:15,073 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-25 19:16:15,273 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 27 for LOIs [2021-11-25 19:16:15,276 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 85 for LOIs [2021-11-25 19:16:15,516 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 78 for LOIs [2021-11-25 19:16:15,531 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 53 for LOIs [2021-11-25 19:16:15,543 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-25 19:16:18,796 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-25 19:16:19,377 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-25 19:16:19,512 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:16:46,627 WARN L227 SmtUtils]: Spent 5.77s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:16:52,897 WARN L227 SmtUtils]: Spent 5.99s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 19:17:13,029 WARN L227 SmtUtils]: Spent 6.10s 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)