./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:04:32,825 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:04:32,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:04:32,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:04:32,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:04:32,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:04:32,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:04:32,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:04:32,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:04:32,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:04:32,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:04:32,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:04:32,895 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:04:32,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:04:32,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:04:32,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:04:32,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:04:32,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:04:32,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:04:32,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:04:32,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:04:32,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:04:32,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:04:32,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:04:32,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:04:32,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:04:32,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:04:32,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:04:32,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:04:32,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:04:32,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:04:32,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:04:32,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:04:32,932 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:04:32,933 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:04:32,934 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:04:32,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:04:32,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:04:32,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:04:32,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:04:32,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:04:32,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:04:32,970 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:04:32,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:04:32,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:04:32,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:04:32,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:04:32,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:04:32,983 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:04:32,984 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:04:32,984 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:04:32,984 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:04:32,985 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:04:32,985 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:04:32,986 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:04:32,986 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:04:32,986 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:04:32,986 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:04:32,987 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:04:32,987 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:04:32,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:04:32,989 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:04:32,989 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:04:32,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:04:32,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:04:32,989 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:04:32,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:04:32,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:04:32,991 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:04:32,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:04:32,992 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:04:32,992 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:04:32,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:04:32,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:04:32,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:04:32,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:04:32,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:04:32,994 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:04:32,994 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:04:32,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:04:32,994 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:04:32,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:04:32,995 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:04:32,995 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_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8333bf118d61dc3e3ddedc658c9d6fef28fa288c9b6abdc361c7a0f5f6e109b7 [2021-11-23 02:04:33,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:04:33,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:04:33,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:04:33,292 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:04:33,293 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:04:33,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2021-11-23 02:04:33,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/data/c7d995446/d91d47cceda14fc29fe551580f987c00/FLAGd88d0e0b3 [2021-11-23 02:04:34,061 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:04:34,064 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c [2021-11-23 02:04:34,084 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/data/c7d995446/d91d47cceda14fc29fe551580f987c00/FLAGd88d0e0b3 [2021-11-23 02:04:34,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/data/c7d995446/d91d47cceda14fc29fe551580f987c00 [2021-11-23 02:04:34,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:04:34,212 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:04:34,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:04:34,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:04:34,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:04:34,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:04:34" (1/1) ... [2021-11-23 02:04:34,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@905205c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:34, skipping insertion in model container [2021-11-23 02:04:34,227 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:04:34" (1/1) ... [2021-11-23 02:04:34,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:04:34,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:04:35,000 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_66630432-01b8-41f9-b96d-b678b9f0068b/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2021-11-23 02:04:35,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:04:35,017 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:04:35,213 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_66630432-01b8-41f9-b96d-b678b9f0068b/sv-benchmarks/c/product-lines/elevator_spec3_product24.cil.c[75121,75134] [2021-11-23 02:04:35,214 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:04:35,250 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:04:35,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:35 WrapperNode [2021-11-23 02:04:35,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:04:35,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:04:35,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:04:35,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:04:35,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:35" (1/1) ... [2021-11-23 02:04:35,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:35" (1/1) ... [2021-11-23 02:04:35,396 INFO L137 Inliner]: procedures = 96, calls = 359, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 966 [2021-11-23 02:04:35,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:04:35,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:04:35,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:04:35,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:04:35,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:35" (1/1) ... [2021-11-23 02:04:35,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:35" (1/1) ... [2021-11-23 02:04:35,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:35" (1/1) ... [2021-11-23 02:04:35,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:35" (1/1) ... [2021-11-23 02:04:35,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:35" (1/1) ... [2021-11-23 02:04:35,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:35" (1/1) ... [2021-11-23 02:04:35,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:35" (1/1) ... [2021-11-23 02:04:35,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:04:35,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:04:35,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:04:35,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:04:35,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:35" (1/1) ... [2021-11-23 02:04:35,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:04:35,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:04:35,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:04:35,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:04:35,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:04:35,635 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-23 02:04:35,636 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-23 02:04:35,636 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-23 02:04:35,636 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-23 02:04:35,636 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-23 02:04:35,636 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-23 02:04:35,637 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-23 02:04:35,637 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-23 02:04:35,637 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-23 02:04:35,637 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-23 02:04:35,637 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-23 02:04:35,638 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-23 02:04:35,638 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-23 02:04:35,638 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-23 02:04:35,638 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-23 02:04:35,638 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-23 02:04:35,639 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 02:04:35,639 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 02:04:35,639 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 02:04:35,639 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 02:04:35,639 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-23 02:04:35,640 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-23 02:04:35,640 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-23 02:04:35,640 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-23 02:04:35,640 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-23 02:04:35,640 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-23 02:04:35,641 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-23 02:04:35,641 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-23 02:04:35,641 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-23 02:04:35,641 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-23 02:04:35,643 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-23 02:04:35,644 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-23 02:04:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-23 02:04:35,644 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-23 02:04:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-23 02:04:35,644 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-23 02:04:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-23 02:04:35,645 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-23 02:04:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-23 02:04:35,645 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-23 02:04:35,646 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-23 02:04:35,646 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-23 02:04:35,646 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-23 02:04:35,647 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-23 02:04:35,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:04:35,648 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-23 02:04:35,649 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-23 02:04:35,649 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-23 02:04:35,650 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-23 02:04:35,650 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-23 02:04:35,650 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-23 02:04:35,650 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-23 02:04:35,650 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-23 02:04:35,651 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-23 02:04:35,652 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-23 02:04:35,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:04:35,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:04:35,652 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-23 02:04:35,653 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-23 02:04:35,653 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-23 02:04:35,653 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-23 02:04:35,813 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:04:35,816 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:04:37,174 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:04:37,852 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:04:37,852 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:04:37,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:04:37 BoogieIcfgContainer [2021-11-23 02:04:37,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:04:37,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:04:37,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:04:37,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:04:37,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:04:34" (1/3) ... [2021-11-23 02:04:37,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529e79f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:04:37, skipping insertion in model container [2021-11-23 02:04:37,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:04:35" (2/3) ... [2021-11-23 02:04:37,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@529e79f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:04:37, skipping insertion in model container [2021-11-23 02:04:37,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:04:37" (3/3) ... [2021-11-23 02:04:37,870 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product24.cil.c [2021-11-23 02:04:37,879 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:04:37,880 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:04:37,948 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:04:37,958 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:04:37,958 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:04:38,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 434 states, 288 states have (on average 1.5555555555555556) internal successors, (448), 308 states have internal predecessors, (448), 115 states have call successors, (115), 29 states have call predecessors, (115), 29 states have return successors, (115), 111 states have call predecessors, (115), 115 states have call successors, (115) [2021-11-23 02:04:38,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:04:38,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:38,024 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:38,026 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:04:38,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:38,032 INFO L85 PathProgramCache]: Analyzing trace with hash -951121915, now seen corresponding path program 1 times [2021-11-23 02:04:38,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:38,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400784018] [2021-11-23 02:04:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:38,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:04:38,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:38,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400784018] [2021-11-23 02:04:38,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400784018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:38,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:04:38,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:04:38,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504103854] [2021-11-23 02:04:38,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:38,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:04:38,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:38,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:04:38,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:04:38,668 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 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 02:04:39,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:39,890 INFO L93 Difference]: Finished difference Result 1240 states and 1966 transitions. [2021-11-23 02:04:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:04:39,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2021-11-23 02:04:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:39,925 INFO L225 Difference]: With dead ends: 1240 [2021-11-23 02:04:39,926 INFO L226 Difference]: Without dead ends: 808 [2021-11-23 02:04:39,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:04:39,945 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 576 mSDsluCounter, 2683 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 3252 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:39,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 3252 Invalid, 763 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [54 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:04:39,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-11-23 02:04:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 800. [2021-11-23 02:04:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 533 states have (on average 1.4859287054409005) internal successors, (792), 567 states have internal predecessors, (792), 214 states have call successors, (214), 55 states have call predecessors, (214), 52 states have return successors, (217), 204 states have call predecessors, (217), 210 states have call successors, (217) [2021-11-23 02:04:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1223 transitions. [2021-11-23 02:04:40,134 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1223 transitions. Word has length 49 [2021-11-23 02:04:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:40,135 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1223 transitions. [2021-11-23 02:04:40,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 02:04:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1223 transitions. [2021-11-23 02:04:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:04:40,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:40,141 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:40,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:04:40,142 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:04:40,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:40,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1102540507, now seen corresponding path program 1 times [2021-11-23 02:04:40,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:40,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617876545] [2021-11-23 02:04:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:40,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:04:40,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:40,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617876545] [2021-11-23 02:04:40,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617876545] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:40,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:04:40,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:04:40,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811076149] [2021-11-23 02:04:40,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:40,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:04:40,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:40,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:04:40,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:04:40,381 INFO L87 Difference]: Start difference. First operand 800 states and 1223 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:04:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:40,733 INFO L93 Difference]: Finished difference Result 2370 states and 3657 transitions. [2021-11-23 02:04:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:04:40,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2021-11-23 02:04:40,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:40,753 INFO L225 Difference]: With dead ends: 2370 [2021-11-23 02:04:40,754 INFO L226 Difference]: Without dead ends: 1583 [2021-11-23 02:04:40,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:04:40,767 INFO L933 BasicCegarLoop]: 739 mSDtfsCounter, 633 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:40,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 1350 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:04:40,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-11-23 02:04:40,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1511. [2021-11-23 02:04:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1035 states have (on average 1.4985507246376812) internal successors, (1551), 1087 states have internal predecessors, (1551), 381 states have call successors, (381), 99 states have call predecessors, (381), 94 states have return successors, (401), 352 states have call predecessors, (401), 375 states have call successors, (401) [2021-11-23 02:04:40,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 2333 transitions. [2021-11-23 02:04:40,897 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 2333 transitions. Word has length 50 [2021-11-23 02:04:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:40,898 INFO L470 AbstractCegarLoop]: Abstraction has 1511 states and 2333 transitions. [2021-11-23 02:04:40,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:04:40,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 2333 transitions. [2021-11-23 02:04:40,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 02:04:40,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:40,908 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:40,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:04:40,908 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:04:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash 461193381, now seen corresponding path program 1 times [2021-11-23 02:04:40,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:40,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273235663] [2021-11-23 02:04:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:40,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:04:41,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:41,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273235663] [2021-11-23 02:04:41,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273235663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:41,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:04:41,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:04:41,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504095815] [2021-11-23 02:04:41,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:41,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:04:41,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:41,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:04:41,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:04:41,093 INFO L87 Difference]: Start difference. First operand 1511 states and 2333 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:04:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:41,425 INFO L93 Difference]: Finished difference Result 3368 states and 5196 transitions. [2021-11-23 02:04:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:04:41,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 93 [2021-11-23 02:04:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:41,443 INFO L225 Difference]: With dead ends: 3368 [2021-11-23 02:04:41,444 INFO L226 Difference]: Without dead ends: 1869 [2021-11-23 02:04:41,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:04:41,456 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 468 mSDsluCounter, 1222 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:41,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 1910 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:04:41,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-11-23 02:04:41,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1853. [2021-11-23 02:04:41,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1261 states have (on average 1.4766058683584458) internal successors, (1862), 1312 states have internal predecessors, (1862), 463 states have call successors, (463), 131 states have call predecessors, (463), 128 states have return successors, (501), 436 states have call predecessors, (501), 455 states have call successors, (501) [2021-11-23 02:04:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 2826 transitions. [2021-11-23 02:04:41,589 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 2826 transitions. Word has length 93 [2021-11-23 02:04:41,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:41,590 INFO L470 AbstractCegarLoop]: Abstraction has 1853 states and 2826 transitions. [2021-11-23 02:04:41,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:04:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 2826 transitions. [2021-11-23 02:04:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:04:41,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:41,594 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:41,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:04:41,595 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:04:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:41,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1387708293, now seen corresponding path program 1 times [2021-11-23 02:04:41,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:41,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113057092] [2021-11-23 02:04:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:41,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:04:41,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:41,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113057092] [2021-11-23 02:04:41,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113057092] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:41,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:04:41,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:04:41,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494435375] [2021-11-23 02:04:41,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:41,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:04:41,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:41,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:04:41,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:04:41,759 INFO L87 Difference]: Start difference. First operand 1853 states and 2826 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:04:42,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:42,821 INFO L93 Difference]: Finished difference Result 4928 states and 7800 transitions. [2021-11-23 02:04:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:04:42,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2021-11-23 02:04:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:42,859 INFO L225 Difference]: With dead ends: 4928 [2021-11-23 02:04:42,860 INFO L226 Difference]: Without dead ends: 3087 [2021-11-23 02:04:42,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:04:42,886 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 710 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 3604 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:42,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 3604 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:04:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3087 states. [2021-11-23 02:04:43,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3087 to 2717. [2021-11-23 02:04:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2717 states, 1852 states have (on average 1.4681425485961124) internal successors, (2719), 1935 states have internal predecessors, (2719), 673 states have call successors, (673), 195 states have call predecessors, (673), 191 states have return successors, (776), 628 states have call predecessors, (776), 662 states have call successors, (776) [2021-11-23 02:04:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2717 states to 2717 states and 4168 transitions. [2021-11-23 02:04:43,127 INFO L78 Accepts]: Start accepts. Automaton has 2717 states and 4168 transitions. Word has length 94 [2021-11-23 02:04:43,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:43,127 INFO L470 AbstractCegarLoop]: Abstraction has 2717 states and 4168 transitions. [2021-11-23 02:04:43,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:04:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2717 states and 4168 transitions. [2021-11-23 02:04:43,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 02:04:43,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:43,131 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:43,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:04:43,132 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:04:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash 601286565, now seen corresponding path program 1 times [2021-11-23 02:04:43,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:43,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455821785] [2021-11-23 02:04:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:43,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:04:43,308 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:43,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455821785] [2021-11-23 02:04:43,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455821785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:04:43,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428762434] [2021-11-23 02:04:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:43,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:43,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:04:43,317 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:04:43,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:04:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:43,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1810 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:04:43,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:04:43,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:04:43,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428762434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:43,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:04:43,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:04:43,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958465955] [2021-11-23 02:04:43,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:43,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:04:43,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:04:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:04:43,975 INFO L87 Difference]: Start difference. First operand 2717 states and 4168 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:04:44,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:44,380 INFO L93 Difference]: Finished difference Result 7678 states and 12160 transitions. [2021-11-23 02:04:44,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:04:44,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 93 [2021-11-23 02:04:44,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:44,438 INFO L225 Difference]: With dead ends: 7678 [2021-11-23 02:04:44,439 INFO L226 Difference]: Without dead ends: 4973 [2021-11-23 02:04:44,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:04:44,471 INFO L933 BasicCegarLoop]: 1110 mSDtfsCounter, 595 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1648 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:44,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 1648 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:04:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4973 states. [2021-11-23 02:04:44,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4973 to 4793. [2021-11-23 02:04:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4793 states, 3286 states have (on average 1.473828362751065) internal successors, (4843), 3456 states have internal predecessors, (4843), 1150 states have call successors, (1150), 345 states have call predecessors, (1150), 356 states have return successors, (1399), 1075 states have call predecessors, (1399), 1139 states have call successors, (1399) [2021-11-23 02:04:44,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4793 states to 4793 states and 7392 transitions. [2021-11-23 02:04:44,858 INFO L78 Accepts]: Start accepts. Automaton has 4793 states and 7392 transitions. Word has length 93 [2021-11-23 02:04:44,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:44,861 INFO L470 AbstractCegarLoop]: Abstraction has 4793 states and 7392 transitions. [2021-11-23 02:04:44,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:04:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 4793 states and 7392 transitions. [2021-11-23 02:04:44,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 02:04:44,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:44,871 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:44,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:45,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:45,088 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:04:45,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash -417977892, now seen corresponding path program 1 times [2021-11-23 02:04:45,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:45,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692912319] [2021-11-23 02:04:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:45,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:04:45,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692912319] [2021-11-23 02:04:45,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692912319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:04:45,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714476183] [2021-11-23 02:04:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:45,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:45,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:04:45,208 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:04:45,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:04:45,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:45,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:04:45,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:04:45,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:04:45,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714476183] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:04:45,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:04:45,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:04:45,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339969866] [2021-11-23 02:04:45,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:04:45,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:04:45,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:04:45,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:04:45,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:04:45,778 INFO L87 Difference]: Start difference. First operand 4793 states and 7392 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:04:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:04:46,331 INFO L93 Difference]: Finished difference Result 10863 states and 17050 transitions. [2021-11-23 02:04:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:04:46,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 94 [2021-11-23 02:04:46,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:04:46,396 INFO L225 Difference]: With dead ends: 10863 [2021-11-23 02:04:46,396 INFO L226 Difference]: Without dead ends: 6082 [2021-11-23 02:04:46,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:04:46,441 INFO L933 BasicCegarLoop]: 762 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, 1297 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:04:46,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 1297 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:04:46,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6082 states. [2021-11-23 02:04:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6082 to 5958. [2021-11-23 02:04:46,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5958 states, 4096 states have (on average 1.472900390625) internal successors, (6033), 4313 states have internal predecessors, (6033), 1412 states have call successors, (1412), 426 states have call predecessors, (1412), 449 states have return successors, (1751), 1324 states have call predecessors, (1751), 1401 states have call successors, (1751) [2021-11-23 02:04:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5958 states to 5958 states and 9196 transitions. [2021-11-23 02:04:46,897 INFO L78 Accepts]: Start accepts. Automaton has 5958 states and 9196 transitions. Word has length 94 [2021-11-23 02:04:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:04:46,897 INFO L470 AbstractCegarLoop]: Abstraction has 5958 states and 9196 transitions. [2021-11-23 02:04:46,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:04:46,898 INFO L276 IsEmpty]: Start isEmpty. Operand 5958 states and 9196 transitions. [2021-11-23 02:04:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-23 02:04:46,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:04:46,903 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:04:46,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:04:47,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:47,116 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:04:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:04:47,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1132720807, now seen corresponding path program 1 times [2021-11-23 02:04:47,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:04:47,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822985546] [2021-11-23 02:04:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:47,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:04:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:04:47,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:04:47,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822985546] [2021-11-23 02:04:47,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822985546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:04:47,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736928117] [2021-11-23 02:04:47,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:04:47,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:04:47,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:04:47,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:04:47,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:04:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:04:47,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 1837 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:04:47,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:04:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 02:04:48,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:04:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:04:48,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736928117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:04:48,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [959020665] [2021-11-23 02:04:48,885 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2021-11-23 02:04:48,885 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:04:48,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:04:48,897 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:04:48,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:04:55,386 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-23 02:05:02,491 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 511 for LOIs [2021-11-23 02:05:02,823 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-23 02:05:04,955 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-23 02:05:05,131 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-23 02:05:05,206 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-23 02:05:05,281 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-23 02:05:08,882 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-23 02:05:09,423 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-23 02:05:09,571 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:05:36,011 WARN L227 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:05:41,939 WARN L227 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:06:30,058 WARN L227 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 511 DAG size of output: 450 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:06:40,204 WARN L227 SmtUtils]: Spent 9.03s on a formula simplification. DAG size of input: 547 DAG size of output: 458 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:07:01,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [959020665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:01,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:01,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [10, 8, 10] total 51 [2021-11-23 02:07:01,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793089650] [2021-11-23 02:07:01,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:01,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 02:07:01,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:01,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 02:07:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2172, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 02:07:01,740 INFO L87 Difference]: Start difference. First operand 5958 states and 9196 transitions. Second operand has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2021-11-23 02:07:31,008 WARN L227 SmtUtils]: Spent 8.80s on a formula simplification. DAG size of input: 607 DAG size of output: 588 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:07:40,217 WARN L227 SmtUtils]: Spent 8.93s on a formula simplification. DAG size of input: 613 DAG size of output: 594 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:08:11,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:11,160 INFO L93 Difference]: Finished difference Result 12055 states and 18610 transitions. [2021-11-23 02:08:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 02:08:11,161 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) Word has length 100 [2021-11-23 02:08:11,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:11,212 INFO L225 Difference]: With dead ends: 12055 [2021-11-23 02:08:11,212 INFO L226 Difference]: Without dead ends: 6109 [2021-11-23 02:08:11,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 251 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 148.8s TimeCoverageRelationStatistics Valid=460, Invalid=2732, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 02:08:11,241 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 158 mSDsluCounter, 3886 mSDsCounter, 0 mSdLazyCounter, 7780 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 4542 SdHoareTripleChecker+Invalid, 7839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 7780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:11,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 4542 Invalid, 7839 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [59 Valid, 7780 Invalid, 0 Unknown, 0 Unchecked, 32.3s Time] [2021-11-23 02:08:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2021-11-23 02:08:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 6030. [2021-11-23 02:08:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6030 states, 4146 states have (on average 1.4688856729377713) internal successors, (6090), 4362 states have internal predecessors, (6090), 1427 states have call successors, (1427), 435 states have call predecessors, (1427), 456 states have return successors, (1767), 1338 states have call predecessors, (1767), 1416 states have call successors, (1767) [2021-11-23 02:08:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6030 states to 6030 states and 9284 transitions. [2021-11-23 02:08:11,734 INFO L78 Accepts]: Start accepts. Automaton has 6030 states and 9284 transitions. Word has length 100 [2021-11-23 02:08:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:11,734 INFO L470 AbstractCegarLoop]: Abstraction has 6030 states and 9284 transitions. [2021-11-23 02:08:11,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 17 states have internal predecessors, (53), 11 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2021-11-23 02:08:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 6030 states and 9284 transitions. [2021-11-23 02:08:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-23 02:08:11,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:11,740 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:11,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:11,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:11,964 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:11,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1741949641, now seen corresponding path program 1 times [2021-11-23 02:08:11,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:11,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831370301] [2021-11-23 02:08:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:11,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:12,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:08:12,159 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:12,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831370301] [2021-11-23 02:08:12,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831370301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318178717] [2021-11-23 02:08:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:12,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:12,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:12,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:12,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:08:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:12,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:08:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-23 02:08:12,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 02:08:13,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318178717] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:08:13,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1994514518] [2021-11-23 02:08:13,290 INFO L159 IcfgInterpreter]: Started Sifa with 91 locations of interest [2021-11-23 02:08:13,290 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:13,291 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:13,291 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:13,291 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:17,462 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-23 02:08:25,994 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 64 for LOIs [2021-11-23 02:08:26,016 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-23 02:08:27,897 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-23 02:08:28,069 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-23 02:08:28,145 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-23 02:08:28,223 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-23 02:08:31,716 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-23 02:08:32,323 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-23 02:08:32,464 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:58,310 WARN L227 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:09:04,156 WARN L227 SmtUtils]: Spent 5.60s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:10:14,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1994514518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:14,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:10:14,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [10, 8, 10] total 50 [2021-11-23 02:10:14,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535673823] [2021-11-23 02:10:14,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:14,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 02:10:14,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:14,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 02:10:14,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 02:10:14,484 INFO L87 Difference]: Start difference. First operand 6030 states and 9284 transitions. Second operand has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2021-11-23 02:11:11,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:11,084 INFO L93 Difference]: Finished difference Result 12033 states and 18572 transitions. [2021-11-23 02:11:11,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 02:11:11,085 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) Word has length 106 [2021-11-23 02:11:11,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:11,124 INFO L225 Difference]: With dead ends: 12033 [2021-11-23 02:11:11,125 INFO L226 Difference]: Without dead ends: 6099 [2021-11-23 02:11:11,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 270 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 129.1s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:11:11,144 INFO L933 BasicCegarLoop]: 717 mSDtfsCounter, 287 mSDsluCounter, 4945 mSDsCounter, 0 mSdLazyCounter, 7826 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 5579 SdHoareTripleChecker+Invalid, 7927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 7826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:11,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 5579 Invalid, 7927 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [101 Valid, 7826 Invalid, 0 Unknown, 0 Unchecked, 29.1s Time] [2021-11-23 02:11:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6099 states. [2021-11-23 02:11:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6099 to 6032. [2021-11-23 02:11:11,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6032 states, 4147 states have (on average 1.4685314685314685) internal successors, (6090), 4363 states have internal predecessors, (6090), 1427 states have call successors, (1427), 436 states have call predecessors, (1427), 457 states have return successors, (1767), 1338 states have call predecessors, (1767), 1416 states have call successors, (1767) [2021-11-23 02:11:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6032 states to 6032 states and 9284 transitions. [2021-11-23 02:11:11,603 INFO L78 Accepts]: Start accepts. Automaton has 6032 states and 9284 transitions. Word has length 106 [2021-11-23 02:11:11,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:11,604 INFO L470 AbstractCegarLoop]: Abstraction has 6032 states and 9284 transitions. [2021-11-23 02:11:11,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 18 states have internal predecessors, (56), 12 states have call successors, (21), 8 states have call predecessors, (21), 9 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2021-11-23 02:11:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 6032 states and 9284 transitions. [2021-11-23 02:11:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 02:11:11,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:11,609 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:11,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:11,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 02:11:11,836 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:11,837 INFO L85 PathProgramCache]: Analyzing trace with hash 555137121, now seen corresponding path program 1 times [2021-11-23 02:11:11,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:11,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417588317] [2021-11-23 02:11:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:11,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:12,027 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:11:12,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:12,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417588317] [2021-11-23 02:11:12,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417588317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:12,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468370510] [2021-11-23 02:11:12,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:12,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:12,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:12,032 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:12,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:11:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:12,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1869 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:11:12,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:11:12,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:11:13,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468370510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460710626] [2021-11-23 02:11:13,126 INFO L159 IcfgInterpreter]: Started Sifa with 95 locations of interest [2021-11-23 02:11:13,127 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:11:13,127 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:11:13,127 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:11:13,127 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:11:16,781 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 582 for LOIs [2021-11-23 02:11:26,492 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 510 for LOIs [2021-11-23 02:11:26,673 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-23 02:11:28,666 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-23 02:11:28,840 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 445 for LOIs [2021-11-23 02:11:28,916 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 445 for LOIs [2021-11-23 02:11:28,992 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-23 02:11:32,354 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-23 02:11:32,927 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-23 02:11:33,068 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:11:59,663 WARN L227 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:12:05,596 WARN L227 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:13:35,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1460710626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:13:35,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:13:35,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [10, 8, 10] total 52 [2021-11-23 02:13:35,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255520646] [2021-11-23 02:13:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:35,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 02:13:35,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:13:35,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 02:13:35,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2235, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 02:13:35,539 INFO L87 Difference]: Start difference. First operand 6032 states and 9284 transitions. Second operand has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-23 02:14:03,053 WARN L227 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 609 DAG size of output: 589 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:14:10,081 WARN L227 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 615 DAG size of output: 595 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:14:41,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:41,759 INFO L93 Difference]: Finished difference Result 12034 states and 18561 transitions. [2021-11-23 02:14:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-23 02:14:41,760 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) Word has length 112 [2021-11-23 02:14:41,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:41,802 INFO L225 Difference]: With dead ends: 12034 [2021-11-23 02:14:41,803 INFO L226 Difference]: Without dead ends: 6100 [2021-11-23 02:14:41,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 284 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 155.1s TimeCoverageRelationStatistics Valid=496, Invalid=2810, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 02:14:41,831 INFO L933 BasicCegarLoop]: 597 mSDtfsCounter, 286 mSDsluCounter, 4827 mSDsCounter, 0 mSdLazyCounter, 8302 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 5339 SdHoareTripleChecker+Invalid, 8405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 8302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:41,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 5339 Invalid, 8405 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [103 Valid, 8302 Invalid, 0 Unknown, 0 Unchecked, 33.2s Time] [2021-11-23 02:14:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2021-11-23 02:14:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 6033. [2021-11-23 02:14:42,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6033 states, 4148 states have (on average 1.4681774349083896) internal successors, (6090), 4364 states have internal predecessors, (6090), 1426 states have call successors, (1426), 437 states have call predecessors, (1426), 458 states have return successors, (1757), 1337 states have call predecessors, (1757), 1415 states have call successors, (1757) [2021-11-23 02:14:42,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6033 states to 6033 states and 9273 transitions. [2021-11-23 02:14:42,334 INFO L78 Accepts]: Start accepts. Automaton has 6033 states and 9273 transitions. Word has length 112 [2021-11-23 02:14:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:42,336 INFO L470 AbstractCegarLoop]: Abstraction has 6033 states and 9273 transitions. [2021-11-23 02:14:42,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.36) internal successors, (59), 19 states have internal predecessors, (59), 13 states have call successors, (22), 8 states have call predecessors, (22), 9 states have return successors, (20), 12 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-23 02:14:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 6033 states and 9273 transitions. [2021-11-23 02:14:42,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 02:14:42,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:42,349 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:42,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:42,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:42,567 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:14:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:42,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1473880289, now seen corresponding path program 1 times [2021-11-23 02:14:42,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:42,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980766236] [2021-11-23 02:14:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:42,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:14:42,798 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:42,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980766236] [2021-11-23 02:14:42,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980766236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:42,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353687689] [2021-11-23 02:14:42,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:42,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:42,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:42,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:42,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:14:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:43,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 2486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:14:43,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:43,445 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 02:14:43,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:14:43,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353687689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:43,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:14:43,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-11-23 02:14:43,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610256496] [2021-11-23 02:14:43,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:43,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:43,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:43,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:14:43,448 INFO L87 Difference]: Start difference. First operand 6033 states and 9273 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:14:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:43,855 INFO L93 Difference]: Finished difference Result 10345 states and 16317 transitions. [2021-11-23 02:14:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:43,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 182 [2021-11-23 02:14:43,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:43,896 INFO L225 Difference]: With dead ends: 10345 [2021-11-23 02:14:43,896 INFO L226 Difference]: Without dead ends: 6340 [2021-11-23 02:14:43,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:14:43,919 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 33 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:43,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 1249 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:43,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6340 states. [2021-11-23 02:14:44,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6340 to 6117. [2021-11-23 02:14:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6117 states, 4220 states have (on average 1.4630331753554502) internal successors, (6174), 4436 states have internal predecessors, (6174), 1438 states have call successors, (1438), 437 states have call predecessors, (1438), 458 states have return successors, (1769), 1349 states have call predecessors, (1769), 1427 states have call successors, (1769) [2021-11-23 02:14:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6117 states to 6117 states and 9381 transitions. [2021-11-23 02:14:44,409 INFO L78 Accepts]: Start accepts. Automaton has 6117 states and 9381 transitions. Word has length 182 [2021-11-23 02:14:44,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:44,409 INFO L470 AbstractCegarLoop]: Abstraction has 6117 states and 9381 transitions. [2021-11-23 02:14:44,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-23 02:14:44,410 INFO L276 IsEmpty]: Start isEmpty. Operand 6117 states and 9381 transitions. [2021-11-23 02:14:44,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 02:14:44,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:44,421 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:44,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:44,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:14:44,648 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:14:44,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:44,649 INFO L85 PathProgramCache]: Analyzing trace with hash 343458810, now seen corresponding path program 1 times [2021-11-23 02:14:44,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:44,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287721221] [2021-11-23 02:14:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:44,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:44,829 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:14:44,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:44,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287721221] [2021-11-23 02:14:44,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287721221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:44,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296015068] [2021-11-23 02:14:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:44,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:44,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:44,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:44,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:14:45,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:45,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 2487 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:14:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-23 02:14:45,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:14:45,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296015068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:45,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:14:45,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2021-11-23 02:14:45,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529518622] [2021-11-23 02:14:45,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:45,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:14:45,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:14:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:14:45,543 INFO L87 Difference]: Start difference. First operand 6117 states and 9381 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-23 02:14:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:49,373 INFO L93 Difference]: Finished difference Result 15597 states and 24519 transitions. [2021-11-23 02:14:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 02:14:49,374 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) Word has length 182 [2021-11-23 02:14:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:49,430 INFO L225 Difference]: With dead ends: 15597 [2021-11-23 02:14:49,430 INFO L226 Difference]: Without dead ends: 9585 [2021-11-23 02:14:49,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 02:14:49,464 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 1678 mSDsluCounter, 2856 mSDsCounter, 0 mSdLazyCounter, 6269 mSolverCounterSat, 838 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1698 SdHoareTripleChecker+Valid, 3740 SdHoareTripleChecker+Invalid, 7107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 838 IncrementalHoareTripleChecker+Valid, 6269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:49,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1698 Valid, 3740 Invalid, 7107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [838 Valid, 6269 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 02:14:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9585 states. [2021-11-23 02:14:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9585 to 8571. [2021-11-23 02:14:49,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8571 states, 5896 states have (on average 1.4469131614654003) internal successors, (8531), 6158 states have internal predecessors, (8531), 1993 states have call successors, (1993), 676 states have call predecessors, (1993), 681 states have return successors, (2528), 1876 states have call predecessors, (2528), 1974 states have call successors, (2528) [2021-11-23 02:14:50,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8571 states to 8571 states and 13052 transitions. [2021-11-23 02:14:50,042 INFO L78 Accepts]: Start accepts. Automaton has 8571 states and 13052 transitions. Word has length 182 [2021-11-23 02:14:50,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:50,043 INFO L470 AbstractCegarLoop]: Abstraction has 8571 states and 13052 transitions. [2021-11-23 02:14:50,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 4 states have call successors, (29), 4 states have call predecessors, (29), 6 states have return successors, (28), 6 states have call predecessors, (28), 4 states have call successors, (28) [2021-11-23 02:14:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 8571 states and 13052 transitions. [2021-11-23 02:14:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-23 02:14:50,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:50,058 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:50,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:50,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:50,284 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:14:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:50,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1976205702, now seen corresponding path program 1 times [2021-11-23 02:14:50,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:50,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799874533] [2021-11-23 02:14:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:50,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:14:50,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:50,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799874533] [2021-11-23 02:14:50,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799874533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:50,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327910373] [2021-11-23 02:14:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:50,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:50,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:50,459 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:50,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66630432-01b8-41f9-b96d-b678b9f0068b/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:14:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:50,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 2504 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:14:50,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 95 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:14:51,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:14:52,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327910373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1804315251] [2021-11-23 02:14:52,160 INFO L159 IcfgInterpreter]: Started Sifa with 108 locations of interest [2021-11-23 02:14:52,160 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:14:52,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:14:52,161 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:14:52,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:14:58,856 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2021-11-23 02:15:07,857 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 191 for LOIs [2021-11-23 02:15:10,607 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 62 for LOIs [2021-11-23 02:15:11,106 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 63 for LOIs [2021-11-23 02:15:11,220 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 65 for LOIs [2021-11-23 02:15:11,247 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 118 for LOIs [2021-11-23 02:15:11,332 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 36 for LOIs [2021-11-23 02:15:11,347 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 607 for LOIs [2021-11-23 02:15:13,306 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 581 for LOIs [2021-11-23 02:15:13,473 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 27 for LOIs [2021-11-23 02:15:13,476 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 89 for LOIs [2021-11-23 02:15:13,717 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 82 for LOIs [2021-11-23 02:15:13,730 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 47 for LOIs [2021-11-23 02:15:13,737 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 581 for LOIs [2021-11-23 02:15:17,073 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2021-11-23 02:15:17,582 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2021-11-23 02:15:17,719 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:15:43,695 WARN L227 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 653 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:15:49,724 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) [2021-11-23 02:16:08,193 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 679 DAG size of output: 565 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)