./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P --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 da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:00:56,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:00:56,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:00:56,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:00:56,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:00:56,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:00:56,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:00:56,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:00:56,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:00:56,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:00:56,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:00:56,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:00:56,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:00:56,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:00:56,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:00:56,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:00:56,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:00:56,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:00:56,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:00:56,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:00:56,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:00:56,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:00:56,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:00:56,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:00:56,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:00:56,735 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:00:56,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:00:56,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:00:56,737 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:00:56,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:00:56,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:00:56,746 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:00:56,748 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:00:56,749 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:00:56,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:00:56,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:00:56,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:00:56,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:00:56,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:00:56,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:00:56,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:00:56,755 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:00:56,800 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:00:56,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:00:56,801 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:00:56,801 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:00:56,802 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:00:56,802 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:00:56,802 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:00:56,802 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:00:56,803 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:00:56,803 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:00:56,803 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:00:56,803 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:00:56,803 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:00:56,804 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:00:56,804 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:00:56,804 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:00:56,804 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:00:56,804 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:00:56,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:00:56,805 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:00:56,805 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:00:56,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:00:56,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:00:56,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:00:56,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:00:56,806 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:00:56,807 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:00:56,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:00:56,807 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:00:56,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:00:56,807 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:00:56,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:00:56,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:56,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:00:56,808 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:00:56,808 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:00:56,809 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:00:56,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:00:56,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:00:56,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:00:56,809 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:00:56,809 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_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da76b57a1451220816a27c40b8cda655a945b2081fe69d46a431c484896fab87 [2021-11-21 01:00:57,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:00:57,086 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:00:57,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:00:57,090 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:00:57,091 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:00:57,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-21 01:00:57,178 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/data/fdc4f0bf5/56d4f7e21c28460d98c051e019b6710e/FLAGab0cc9530 [2021-11-21 01:00:57,918 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:00:57,918 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c [2021-11-21 01:00:57,940 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/data/fdc4f0bf5/56d4f7e21c28460d98c051e019b6710e/FLAGab0cc9530 [2021-11-21 01:00:58,023 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/data/fdc4f0bf5/56d4f7e21c28460d98c051e019b6710e [2021-11-21 01:00:58,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:00:58,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:00:58,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:58,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:00:58,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:00:58,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:58" (1/1) ... [2021-11-21 01:00:58,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@533b5394 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:58, skipping insertion in model container [2021-11-21 01:00:58,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:00:58" (1/1) ... [2021-11-21 01:00:58,055 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:00:58,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:00:58,811 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_ddc7b678-e2dd-4c48-aa28-0e38580cf652/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-21 01:00:58,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:58,898 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:00:59,012 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_ddc7b678-e2dd-4c48-aa28-0e38580cf652/sv-benchmarks/c/product-lines/elevator_spec14_product28.cil.c[43703,43716] [2021-11-21 01:00:59,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:00:59,082 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:00:59,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:59 WrapperNode [2021-11-21 01:00:59,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:00:59,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:59,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:00:59,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:00:59,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:59" (1/1) ... [2021-11-21 01:00:59,128 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:59" (1/1) ... [2021-11-21 01:00:59,221 INFO L137 Inliner]: procedures = 94, calls = 341, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1104 [2021-11-21 01:00:59,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:00:59,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:00:59,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:00:59,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:00:59,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:59" (1/1) ... [2021-11-21 01:00:59,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:59" (1/1) ... [2021-11-21 01:00:59,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:59" (1/1) ... [2021-11-21 01:00:59,253 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:59" (1/1) ... [2021-11-21 01:00:59,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:59" (1/1) ... [2021-11-21 01:00:59,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:59" (1/1) ... [2021-11-21 01:00:59,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:59" (1/1) ... [2021-11-21 01:00:59,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:00:59,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:00:59,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:00:59,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:00:59,377 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:59" (1/1) ... [2021-11-21 01:00:59,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:00:59,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:00:59,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:00:59,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:00:59,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:00:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-21 01:00:59,471 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-21 01:00:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-21 01:00:59,471 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-21 01:00:59,471 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-21 01:00:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-21 01:00:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-21 01:00:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-21 01:00:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-21 01:00:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-21 01:00:59,472 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-21 01:00:59,472 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-21 01:00:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-21 01:00:59,473 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-21 01:00:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-21 01:00:59,473 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-21 01:00:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-21 01:00:59,473 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-21 01:00:59,473 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-21 01:00:59,474 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-21 01:00:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-21 01:00:59,474 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-21 01:00:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-21 01:00:59,474 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-21 01:00:59,474 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-21 01:00:59,474 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-21 01:00:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-21 01:00:59,475 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-21 01:00:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-21 01:00:59,475 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-21 01:00:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-21 01:00:59,475 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-21 01:00:59,475 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-21 01:00:59,476 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-21 01:00:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-21 01:00:59,476 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-21 01:00:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-21 01:00:59,476 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-21 01:00:59,476 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-21 01:00:59,477 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-21 01:00:59,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:00:59,477 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-21 01:00:59,477 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-21 01:00:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-21 01:00:59,478 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-21 01:00:59,478 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-21 01:00:59,479 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-21 01:00:59,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:00:59,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:00:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-21 01:00:59,481 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-21 01:00:59,481 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2021-11-21 01:00:59,481 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2021-11-21 01:00:59,674 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:00:59,676 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:01:00,835 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:01:01,465 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:01:01,465 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 01:01:01,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:01:01 BoogieIcfgContainer [2021-11-21 01:01:01,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:01:01,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:01:01,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:01:01,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:01:01,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:00:58" (1/3) ... [2021-11-21 01:01:01,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8fc4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:01:01, skipping insertion in model container [2021-11-21 01:01:01,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:00:59" (2/3) ... [2021-11-21 01:01:01,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8fc4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:01:01, skipping insertion in model container [2021-11-21 01:01:01,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:01:01" (3/3) ... [2021-11-21 01:01:01,481 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product28.cil.c [2021-11-21 01:01:01,486 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:01:01,487 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:01:01,558 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:01:01,566 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 [2021-11-21 01:01:01,567 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:01:01,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2021-11-21 01:01:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-21 01:01:01,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:01,633 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] [2021-11-21 01:01:01,633 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:01,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1751061673, now seen corresponding path program 1 times [2021-11-21 01:01:01,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:01,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813736188] [2021-11-21 01:01:01,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:01,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 01:01:02,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:02,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813736188] [2021-11-21 01:01:02,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813736188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:02,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:02,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:01:02,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174322968] [2021-11-21 01:01:02,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:02,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:01:02,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:02,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:01:02,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:01:02,175 INFO L87 Difference]: Start difference. First operand has 366 states, 242 states have (on average 1.56198347107438) internal successors, (378), 260 states have internal predecessors, (378), 97 states have call successors, (97), 25 states have call predecessors, (97), 25 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:01:02,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:02,685 INFO L93 Difference]: Finished difference Result 1074 states and 1705 transitions. [2021-11-21 01:01:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:01:02,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 43 [2021-11-21 01:01:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:02,726 INFO L225 Difference]: With dead ends: 1074 [2021-11-21 01:01:02,726 INFO L226 Difference]: Without dead ends: 709 [2021-11-21 01:01:02,739 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 [2021-11-21 01:01:02,745 INFO L933 BasicCegarLoop]: 679 mSDtfsCounter, 546 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:02,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 1198 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:01:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-11-21 01:01:02,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 673. [2021-11-21 01:01:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 459 states have (on average 1.5642701525054465) internal successors, (718), 485 states have internal predecessors, (718), 170 states have call successors, (170), 45 states have call predecessors, (170), 43 states have return successors, (175), 157 states have call predecessors, (175), 168 states have call successors, (175) [2021-11-21 01:01:02,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1063 transitions. [2021-11-21 01:01:02,958 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1063 transitions. Word has length 43 [2021-11-21 01:01:02,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:02,959 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 1063 transitions. [2021-11-21 01:01:02,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-21 01:01:02,965 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1063 transitions. [2021-11-21 01:01:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-21 01:01:02,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:02,984 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:01:02,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:01:02,986 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash 26132879, now seen corresponding path program 1 times [2021-11-21 01:01:02,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:02,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117182346] [2021-11-21 01:01:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:02,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:03,234 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-21 01:01:03,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:03,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117182346] [2021-11-21 01:01:03,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117182346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:03,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:03,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 01:01:03,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952404560] [2021-11-21 01:01:03,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:03,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 01:01:03,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:03,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 01:01:03,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:01:03,239 INFO L87 Difference]: Start difference. First operand 673 states and 1063 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 01:01:05,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:05,683 INFO L93 Difference]: Finished difference Result 2177 states and 3481 transitions. [2021-11-21 01:01:05,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:01:05,684 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2021-11-21 01:01:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:05,701 INFO L225 Difference]: With dead ends: 2177 [2021-11-21 01:01:05,702 INFO L226 Difference]: Without dead ends: 1516 [2021-11-21 01:01:05,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:01:05,712 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 1074 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 1572 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:05,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 1572 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-21 01:01:05,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-11-21 01:01:05,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1374. [2021-11-21 01:01:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 940 states have (on average 1.5606382978723403) internal successors, (1467), 991 states have internal predecessors, (1467), 340 states have call successors, (340), 91 states have call predecessors, (340), 93 states have return successors, (384), 318 states have call predecessors, (384), 336 states have call successors, (384) [2021-11-21 01:01:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2191 transitions. [2021-11-21 01:01:05,850 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2191 transitions. Word has length 87 [2021-11-21 01:01:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:05,851 INFO L470 AbstractCegarLoop]: Abstraction has 1374 states and 2191 transitions. [2021-11-21 01:01:05,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-21 01:01:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2191 transitions. [2021-11-21 01:01:05,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-21 01:01:05,858 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:05,858 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:01:05,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:01:05,858 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:05,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:05,859 INFO L85 PathProgramCache]: Analyzing trace with hash 826960521, now seen corresponding path program 1 times [2021-11-21 01:01:05,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:05,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755688517] [2021-11-21 01:01:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:05,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:01:06,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:06,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755688517] [2021-11-21 01:01:06,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755688517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:06,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852138195] [2021-11-21 01:01:06,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:06,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:06,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:06,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:06,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:01:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:06,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:01:06,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-21 01:01:06,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:01:06,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852138195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:06,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:01:06,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-21 01:01:06,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185507920] [2021-11-21 01:01:06,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:06,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:01:06,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:06,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:01:06,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:01:06,783 INFO L87 Difference]: Start difference. First operand 1374 states and 2191 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:01:07,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:07,450 INFO L93 Difference]: Finished difference Result 3013 states and 4786 transitions. [2021-11-21 01:01:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:01:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 90 [2021-11-21 01:01:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:07,469 INFO L225 Difference]: With dead ends: 3013 [2021-11-21 01:01:07,469 INFO L226 Difference]: Without dead ends: 1650 [2021-11-21 01:01:07,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:01:07,487 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 375 mSDsluCounter, 1768 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 2242 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:07,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 2242 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-21 01:01:07,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-11-21 01:01:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1600. [2021-11-21 01:01:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1079 states have (on average 1.5199258572752548) internal successors, (1640), 1129 states have internal predecessors, (1640), 397 states have call successors, (397), 121 states have call predecessors, (397), 123 states have return successors, (455), 376 states have call predecessors, (455), 391 states have call successors, (455) [2021-11-21 01:01:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2492 transitions. [2021-11-21 01:01:07,667 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2492 transitions. Word has length 90 [2021-11-21 01:01:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:07,670 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2492 transitions. [2021-11-21 01:01:07,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-21 01:01:07,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2492 transitions. [2021-11-21 01:01:07,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-21 01:01:07,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:07,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-21 01:01:07,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 01:01:07,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:07,901 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:07,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:07,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1058882386, now seen corresponding path program 1 times [2021-11-21 01:01:07,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:07,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643673897] [2021-11-21 01:01:07,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:07,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-21 01:01:08,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:08,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643673897] [2021-11-21 01:01:08,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643673897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:08,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:08,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-21 01:01:08,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654187518] [2021-11-21 01:01:08,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:08,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:01:08,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:08,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:01:08,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:01:08,094 INFO L87 Difference]: Start difference. First operand 1600 states and 2492 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-21 01:01:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:10,853 INFO L93 Difference]: Finished difference Result 1978 states and 3164 transitions. [2021-11-21 01:01:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 01:01:10,854 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 91 [2021-11-21 01:01:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:10,882 INFO L225 Difference]: With dead ends: 1978 [2021-11-21 01:01:10,882 INFO L226 Difference]: Without dead ends: 1976 [2021-11-21 01:01:10,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2021-11-21 01:01:10,891 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1143 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 3197 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 2424 SdHoareTripleChecker+Invalid, 3897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 3197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:10,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 2424 Invalid, 3897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 3197 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-21 01:01:10,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-11-21 01:01:11,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1780. [2021-11-21 01:01:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1173 states have (on average 1.5089514066496164) internal successors, (1770), 1245 states have internal predecessors, (1770), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-21 01:01:11,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2788 transitions. [2021-11-21 01:01:11,120 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2788 transitions. Word has length 91 [2021-11-21 01:01:11,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:11,121 INFO L470 AbstractCegarLoop]: Abstraction has 1780 states and 2788 transitions. [2021-11-21 01:01:11,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-21 01:01:11,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2788 transitions. [2021-11-21 01:01:11,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 01:01:11,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:11,134 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:11,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:01:11,134 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:11,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash -158760090, now seen corresponding path program 1 times [2021-11-21 01:01:11,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:11,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36491715] [2021-11-21 01:01:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:11,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-21 01:01:11,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:11,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36491715] [2021-11-21 01:01:11,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36491715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:11,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:01:11,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:01:11,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505977825] [2021-11-21 01:01:11,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:11,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:01:11,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:11,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:01:11,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:01:11,282 INFO L87 Difference]: Start difference. First operand 1780 states and 2788 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 01:01:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:11,584 INFO L93 Difference]: Finished difference Result 3646 states and 5774 transitions. [2021-11-21 01:01:11,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:01:11,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2021-11-21 01:01:11,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:11,606 INFO L225 Difference]: With dead ends: 3646 [2021-11-21 01:01:11,606 INFO L226 Difference]: Without dead ends: 1878 [2021-11-21 01:01:11,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:01:11,625 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 30 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1567 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:11,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 1567 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:01:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2021-11-21 01:01:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1792. [2021-11-21 01:01:11,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1185 states have (on average 1.5037974683544304) internal successors, (1782), 1257 states have internal predecessors, (1782), 479 states have call successors, (479), 121 states have call predecessors, (479), 127 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-21 01:01:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2800 transitions. [2021-11-21 01:01:11,811 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2800 transitions. Word has length 122 [2021-11-21 01:01:11,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:11,813 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 2800 transitions. [2021-11-21 01:01:11,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (19), 1 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 01:01:11,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2800 transitions. [2021-11-21 01:01:11,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-21 01:01:11,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:11,819 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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] [2021-11-21 01:01:11,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:01:11,819 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash -125520464, now seen corresponding path program 1 times [2021-11-21 01:01:11,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:11,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185584989] [2021-11-21 01:01:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:11,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-21 01:01:12,015 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:12,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185584989] [2021-11-21 01:01:12,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185584989] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:12,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222326256] [2021-11-21 01:01:12,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:12,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:12,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:12,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:12,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:01:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:12,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:12,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-21 01:01:12,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:01:12,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222326256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:12,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:01:12,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2021-11-21 01:01:12,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480479744] [2021-11-21 01:01:12,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:12,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:01:12,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:12,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:01:12,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-21 01:01:12,624 INFO L87 Difference]: Start difference. First operand 1792 states and 2800 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:01:12,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:12,972 INFO L93 Difference]: Finished difference Result 3728 states and 5948 transitions. [2021-11-21 01:01:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:01:12,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 125 [2021-11-21 01:01:12,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:12,997 INFO L225 Difference]: With dead ends: 3728 [2021-11-21 01:01:12,998 INFO L226 Difference]: Without dead ends: 1948 [2021-11-21 01:01:13,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:01:13,013 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 213 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:13,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1359 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:01:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1948 states. [2021-11-21 01:01:13,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1948 to 1948. [2021-11-21 01:01:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1337 states have (on average 1.5512341062079282) internal successors, (2074), 1409 states have internal predecessors, (2074), 479 states have call successors, (479), 125 states have call predecessors, (479), 131 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-21 01:01:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 3092 transitions. [2021-11-21 01:01:13,201 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 3092 transitions. Word has length 125 [2021-11-21 01:01:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:13,201 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 3092 transitions. [2021-11-21 01:01:13,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:01:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 3092 transitions. [2021-11-21 01:01:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-21 01:01:13,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:13,208 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 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] [2021-11-21 01:01:13,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:13,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:01:13,421 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:13,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:13,421 INFO L85 PathProgramCache]: Analyzing trace with hash 330063092, now seen corresponding path program 1 times [2021-11-21 01:01:13,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:13,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877998086] [2021-11-21 01:01:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:13,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-21 01:01:13,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:13,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877998086] [2021-11-21 01:01:13,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877998086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:13,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20687434] [2021-11-21 01:01:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:13,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:13,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:13,533 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:13,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:01:13,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:13,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1523 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:13,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-21 01:01:14,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:01:14,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20687434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:14,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:01:14,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-21 01:01:14,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721544197] [2021-11-21 01:01:14,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:14,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:01:14,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:14,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:01:14,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:01:14,112 INFO L87 Difference]: Start difference. First operand 1948 states and 3092 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:01:14,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:14,447 INFO L93 Difference]: Finished difference Result 4040 states and 6526 transitions. [2021-11-21 01:01:14,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:01:14,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 130 [2021-11-21 01:01:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:14,465 INFO L225 Difference]: With dead ends: 4040 [2021-11-21 01:01:14,466 INFO L226 Difference]: Without dead ends: 2104 [2021-11-21 01:01:14,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:01:14,480 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 211 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:14,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1359 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:01:14,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-11-21 01:01:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2104. [2021-11-21 01:01:14,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1489 states have (on average 1.5889858965748824) internal successors, (2366), 1561 states have internal predecessors, (2366), 479 states have call successors, (479), 129 states have call predecessors, (479), 135 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-21 01:01:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3384 transitions. [2021-11-21 01:01:14,649 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3384 transitions. Word has length 130 [2021-11-21 01:01:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:14,649 INFO L470 AbstractCegarLoop]: Abstraction has 2104 states and 3384 transitions. [2021-11-21 01:01:14,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:01:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3384 transitions. [2021-11-21 01:01:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-21 01:01:14,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:14,656 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 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] [2021-11-21 01:01:14,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:14,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:14,873 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:14,873 INFO L85 PathProgramCache]: Analyzing trace with hash -910319452, now seen corresponding path program 1 times [2021-11-21 01:01:14,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:14,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665288508] [2021-11-21 01:01:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:14,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:14,968 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-21 01:01:14,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:14,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665288508] [2021-11-21 01:01:14,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665288508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:14,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357502876] [2021-11-21 01:01:14,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:14,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:14,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:14,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:14,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:01:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:15,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1527 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:15,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-21 01:01:15,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:01:15,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357502876] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:15,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:01:15,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-21 01:01:15,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695372833] [2021-11-21 01:01:15,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:15,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:01:15,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:15,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:01:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:01:15,549 INFO L87 Difference]: Start difference. First operand 2104 states and 3384 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:01:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:15,897 INFO L93 Difference]: Finished difference Result 4352 states and 7104 transitions. [2021-11-21 01:01:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:01:15,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 134 [2021-11-21 01:01:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:15,918 INFO L225 Difference]: With dead ends: 4352 [2021-11-21 01:01:15,918 INFO L226 Difference]: Without dead ends: 2260 [2021-11-21 01:01:15,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:01:15,933 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 209 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:15,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1359 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:01:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2021-11-21 01:01:16,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2021-11-21 01:01:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 1641 states have (on average 1.6197440585009142) internal successors, (2658), 1713 states have internal predecessors, (2658), 479 states have call successors, (479), 133 states have call predecessors, (479), 139 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-21 01:01:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 3676 transitions. [2021-11-21 01:01:16,117 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 3676 transitions. Word has length 134 [2021-11-21 01:01:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:16,119 INFO L470 AbstractCegarLoop]: Abstraction has 2260 states and 3676 transitions. [2021-11-21 01:01:16,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:01:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 3676 transitions. [2021-11-21 01:01:16,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-21 01:01:16,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:16,127 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 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] [2021-11-21 01:01:16,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:16,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:16,341 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:16,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1694048112, now seen corresponding path program 1 times [2021-11-21 01:01:16,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:16,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842454815] [2021-11-21 01:01:16,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:16,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:01:16,442 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:16,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842454815] [2021-11-21 01:01:16,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842454815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:16,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112920596] [2021-11-21 01:01:16,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:16,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:16,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:16,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:16,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:01:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:16,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1530 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 01:01:16,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 01:01:16,960 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:01:16,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112920596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:01:16,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:01:16,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-21 01:01:16,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720050227] [2021-11-21 01:01:16,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:01:16,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:01:16,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:01:16,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:01:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:01:16,964 INFO L87 Difference]: Start difference. First operand 2260 states and 3676 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:01:17,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:01:17,295 INFO L93 Difference]: Finished difference Result 4664 states and 7682 transitions. [2021-11-21 01:01:17,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:01:17,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 137 [2021-11-21 01:01:17,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:01:17,356 INFO L225 Difference]: With dead ends: 4664 [2021-11-21 01:01:17,356 INFO L226 Difference]: Without dead ends: 2416 [2021-11-21 01:01:17,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 01:01:17,373 INFO L933 BasicCegarLoop]: 461 mSDtfsCounter, 207 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 01:01:17,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1359 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 01:01:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-11-21 01:01:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2416. [2021-11-21 01:01:17,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2416 states, 1793 states have (on average 1.645287228109314) internal successors, (2950), 1865 states have internal predecessors, (2950), 479 states have call successors, (479), 137 states have call predecessors, (479), 143 states have return successors, (539), 452 states have call predecessors, (539), 473 states have call successors, (539) [2021-11-21 01:01:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2416 states to 2416 states and 3968 transitions. [2021-11-21 01:01:17,561 INFO L78 Accepts]: Start accepts. Automaton has 2416 states and 3968 transitions. Word has length 137 [2021-11-21 01:01:17,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:01:17,561 INFO L470 AbstractCegarLoop]: Abstraction has 2416 states and 3968 transitions. [2021-11-21 01:01:17,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-21 01:01:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2416 states and 3968 transitions. [2021-11-21 01:01:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-21 01:01:17,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:01:17,571 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:01:17,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:01:17,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:17,793 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:01:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:01:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash -805690754, now seen corresponding path program 1 times [2021-11-21 01:01:17,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:01:17,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843230896] [2021-11-21 01:01:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:17,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:01:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-21 01:01:17,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:01:17,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843230896] [2021-11-21 01:01:17,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843230896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:01:17,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988702582] [2021-11-21 01:01:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:01:17,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:01:17,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:01:17,974 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:01:17,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc7b678-e2dd-4c48-aa28-0e38580cf652/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:01:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:01:18,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1526 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-21 01:01:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:01:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-21 01:01:19,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:02:05,751 WARN L227 SmtUtils]: Spent 42.42s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-21 01:02:49,089 WARN L227 SmtUtils]: Spent 41.84s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 231] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-21 01:02:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-21 01:02:50,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988702582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:02:50,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [388879376] [2021-11-21 01:02:50,832 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2021-11-21 01:02:50,833 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:02:50,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:02:50,847 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:02:50,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:03:23,096 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 578 for LOIs [2021-11-21 01:04:18,719 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__executivefloor with input of size 585 for LOIs [2021-11-21 01:08:58,369 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 502 for LOIs [2021-11-21 01:09:10,684 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 452 for LOIs [2021-11-21 01:09:27,039 INFO L197 IcfgInterpreter]: Interpreting procedure areDoorsOpen with input of size 507 for LOIs [2021-11-21 01:09:28,579 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 495 for LOIs [2021-11-21 01:09:29,806 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 502 for LOIs [2021-11-21 01:09:33,335 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 469 for LOIs [2021-11-21 01:09:36,055 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 38 for LOIs [2021-11-21 01:09:36,102 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 579 for LOIs [2021-11-21 01:10:28,769 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 600 for LOIs [2021-11-21 01:10:35,952 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2021-11-21 01:10:39,509 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:10:54,771 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 651 DAG size of output: 598 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:12:04,867 WARN L227 SmtUtils]: Spent 17.68s on a formula simplification. DAG size of input: 660 DAG size of output: 613 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:12:14,195 WARN L227 SmtUtils]: Spent 7.10s on a formula simplification that was a NOOP. DAG size: 603 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:12:23,539 WARN L227 SmtUtils]: Spent 7.25s on a formula simplification that was a NOOP. DAG size: 605 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)