./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:30:30,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:30:30,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:30:31,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:30:31,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:30:31,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:30:31,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:30:31,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:30:31,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:30:31,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:30:31,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:30:31,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:30:31,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:30:31,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:30:31,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:30:31,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:30:31,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:30:31,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:30:31,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:30:31,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:30:31,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:30:31,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:30:31,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:30:31,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:30:31,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:30:31,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:30:31,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:30:31,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:30:31,097 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:30:31,098 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:30:31,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:30:31,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:30:31,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:30:31,103 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:30:31,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:30:31,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:30:31,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:30:31,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:30:31,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:30:31,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:30:31,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:30:31,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 03:30:31,146 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:30:31,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:30:31,147 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:30:31,147 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:30:31,148 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:30:31,148 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:30:31,148 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:30:31,149 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:30:31,149 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:30:31,149 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:30:31,150 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:30:31,150 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:30:31,150 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:30:31,151 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:30:31,151 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:30:31,151 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:30:31,151 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:30:31,152 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:30:31,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:30:31,153 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:30:31,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:30:31,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:30:31,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:30:31,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:30:31,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:30:31,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:30:31,156 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:30:31,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:30:31,156 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:30:31,157 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:30:31,157 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:30:31,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:30:31,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:30:31,158 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:30:31,158 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:30:31,158 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:30:31,158 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:30:31,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:30:31,159 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:30:31,159 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:30:31,159 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:30:31,159 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_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cc96375562d846fbf28439914184b0f5b3d70ee1197dff8e1988bf2754bc90e [2021-11-23 03:30:31,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:30:31,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:30:31,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:30:31,545 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:30:31,546 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:30:31,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-23 03:30:31,641 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/data/59dfb1fb3/ae44d71766e34cae89ad2bbb2c0a69ff/FLAG3b0ddf0cd [2021-11-23 03:30:32,270 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:30:32,270 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c [2021-11-23 03:30:32,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/data/59dfb1fb3/ae44d71766e34cae89ad2bbb2c0a69ff/FLAG3b0ddf0cd [2021-11-23 03:30:32,447 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/data/59dfb1fb3/ae44d71766e34cae89ad2bbb2c0a69ff [2021-11-23 03:30:32,452 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:30:32,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:30:32,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:30:32,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:30:32,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:30:32,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:30:32" (1/1) ... [2021-11-23 03:30:32,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26eb8f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:32, skipping insertion in model container [2021-11-23 03:30:32,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:30:32" (1/1) ... [2021-11-23 03:30:32,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:30:32,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:30:32,762 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_2902923a-bc90-4c21-a17a-8e347ecc7ee6/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-23 03:30:33,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:30:33,251 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:30:33,268 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_2902923a-bc90-4c21-a17a-8e347ecc7ee6/sv-benchmarks/c/product-lines/elevator_spec14_product27.cil.c[1546,1559] [2021-11-23 03:30:33,403 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:30:33,435 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:30:33,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:33 WrapperNode [2021-11-23 03:30:33,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:30:33,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:30:33,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:30:33,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:30:33,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:33" (1/1) ... [2021-11-23 03:30:33,502 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:33" (1/1) ... [2021-11-23 03:30:33,596 INFO L137 Inliner]: procedures = 92, calls = 335, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 1095 [2021-11-23 03:30:33,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:30:33,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:30:33,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:30:33,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:30:33,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:33" (1/1) ... [2021-11-23 03:30:33,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:33" (1/1) ... [2021-11-23 03:30:33,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:33" (1/1) ... [2021-11-23 03:30:33,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:33" (1/1) ... [2021-11-23 03:30:33,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:33" (1/1) ... [2021-11-23 03:30:33,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:33" (1/1) ... [2021-11-23 03:30:33,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:33" (1/1) ... [2021-11-23 03:30:33,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:30:33,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:30:33,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:30:33,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:30:33,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:33" (1/1) ... [2021-11-23 03:30:33,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:30:33,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:30:33,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:30:33,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:30:33,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:30:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-23 03:30:33,927 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-23 03:30:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-23 03:30:33,927 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-23 03:30:33,927 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-23 03:30:33,928 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-23 03:30:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-23 03:30:33,928 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-23 03:30:33,928 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-23 03:30:33,928 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-23 03:30:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-23 03:30:33,929 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-23 03:30:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-23 03:30:33,929 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-23 03:30:33,929 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-23 03:30:33,930 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-23 03:30:33,930 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-23 03:30:33,930 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-23 03:30:33,930 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-23 03:30:33,930 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-23 03:30:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-23 03:30:33,931 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-23 03:30:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-23 03:30:33,931 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-23 03:30:33,931 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-23 03:30:33,931 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-23 03:30:33,932 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-23 03:30:33,932 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-23 03:30:33,932 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-23 03:30:33,932 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-23 03:30:33,932 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-23 03:30:33,933 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-23 03:30:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-23 03:30:33,933 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-23 03:30:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-23 03:30:33,933 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-23 03:30:33,933 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-23 03:30:33,934 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-23 03:30:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:30:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-23 03:30:33,934 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-23 03:30:33,934 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-23 03:30:33,935 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-23 03:30:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-23 03:30:33,935 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-23 03:30:33,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:30:33,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:30:33,936 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-23 03:30:33,936 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-23 03:30:34,077 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:30:34,080 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:30:35,315 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:30:35,958 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:30:35,958 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:30:35,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:30:35 BoogieIcfgContainer [2021-11-23 03:30:35,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:30:35,968 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:30:35,968 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:30:35,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:30:35,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:30:32" (1/3) ... [2021-11-23 03:30:35,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31bf0d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:30:35, skipping insertion in model container [2021-11-23 03:30:35,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:30:33" (2/3) ... [2021-11-23 03:30:35,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31bf0d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:30:35, skipping insertion in model container [2021-11-23 03:30:35,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:30:35" (3/3) ... [2021-11-23 03:30:35,975 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product27.cil.c [2021-11-23 03:30:35,984 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:30:35,985 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:30:36,050 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:30:36,058 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:30:36,058 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:30:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-23 03:30:36,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-23 03:30:36,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:36,114 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:36,114 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:36,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:36,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1884041600, now seen corresponding path program 1 times [2021-11-23 03:30:36,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:36,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010124918] [2021-11-23 03:30:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:36,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:36,659 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 03:30:36,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:36,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010124918] [2021-11-23 03:30:36,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010124918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:36,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:36,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:30:36,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218605975] [2021-11-23 03:30:36,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:36,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:30:36,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:36,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:30:36,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:30:36,700 INFO L87 Difference]: Start difference. First operand has 353 states, 235 states have (on average 1.5702127659574467) internal successors, (369), 251 states have internal predecessors, (369), 93 states have call successors, (93), 23 states have call predecessors, (93), 23 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 03:30:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:37,466 INFO L93 Difference]: Finished difference Result 1037 states and 1657 transitions. [2021-11-23 03:30:37,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:30:37,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2021-11-23 03:30:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:37,501 INFO L225 Difference]: With dead ends: 1037 [2021-11-23 03:30:37,501 INFO L226 Difference]: Without dead ends: 685 [2021-11-23 03:30:37,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:30:37,519 INFO L933 BasicCegarLoop]: 662 mSDtfsCounter, 530 mSDsluCounter, 1759 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:37,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 2306 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:30:37,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-11-23 03:30:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 679. [2021-11-23 03:30:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 455 states have (on average 1.5604395604395604) internal successors, (710), 484 states have internal predecessors, (710), 180 states have call successors, (180), 45 states have call predecessors, (180), 43 states have return successors, (186), 174 states have call predecessors, (186), 178 states have call successors, (186) [2021-11-23 03:30:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2021-11-23 03:30:37,678 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 73 [2021-11-23 03:30:37,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:37,679 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2021-11-23 03:30:37,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-11-23 03:30:37,680 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2021-11-23 03:30:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 03:30:37,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:37,689 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:37,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:30:37,690 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:37,691 INFO L85 PathProgramCache]: Analyzing trace with hash 526041047, now seen corresponding path program 1 times [2021-11-23 03:30:37,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:37,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130632995] [2021-11-23 03:30:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:37,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 03:30:37,909 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:37,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130632995] [2021-11-23 03:30:37,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130632995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:37,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:37,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:30:37,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224464241] [2021-11-23 03:30:37,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:37,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:30:37,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:37,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:30:37,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:30:37,946 INFO L87 Difference]: Start difference. First operand 679 states and 1076 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 03:30:38,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:38,681 INFO L93 Difference]: Finished difference Result 776 states and 1223 transitions. [2021-11-23 03:30:38,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:30:38,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 77 [2021-11-23 03:30:38,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:38,694 INFO L225 Difference]: With dead ends: 776 [2021-11-23 03:30:38,694 INFO L226 Difference]: Without dead ends: 774 [2021-11-23 03:30:38,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:30:38,702 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 637 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:38,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 1626 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:30:38,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-11-23 03:30:38,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 764. [2021-11-23 03:30:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 506 states have (on average 1.5276679841897234) internal successors, (773), 535 states have internal predecessors, (773), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2021-11-23 03:30:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1189 transitions. [2021-11-23 03:30:38,775 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1189 transitions. Word has length 77 [2021-11-23 03:30:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:38,776 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 1189 transitions. [2021-11-23 03:30:38,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 03:30:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1189 transitions. [2021-11-23 03:30:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 03:30:38,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:38,788 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2021-11-23 03:30:38,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:30:38,789 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:38,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1228260862, now seen corresponding path program 1 times [2021-11-23 03:30:38,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:38,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782210958] [2021-11-23 03:30:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:38,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-23 03:30:38,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:38,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782210958] [2021-11-23 03:30:38,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782210958] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:38,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:30:38,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:30:38,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381894378] [2021-11-23 03:30:38,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:38,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:30:38,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:38,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:30:38,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:30:38,927 INFO L87 Difference]: Start difference. First operand 764 states and 1189 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 03:30:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:39,170 INFO L93 Difference]: Finished difference Result 1554 states and 2447 transitions. [2021-11-23 03:30:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:30:39,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 108 [2021-11-23 03:30:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:39,180 INFO L225 Difference]: With dead ends: 1554 [2021-11-23 03:30:39,180 INFO L226 Difference]: Without dead ends: 802 [2021-11-23 03:30:39,187 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 [2021-11-23 03:30:39,196 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 54 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:30:39,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1534 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:30:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-11-23 03:30:39,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 768. [2021-11-23 03:30:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 510 states have (on average 1.5235294117647058) internal successors, (777), 539 states have internal predecessors, (777), 202 states have call successors, (202), 58 states have call predecessors, (202), 55 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2021-11-23 03:30:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1193 transitions. [2021-11-23 03:30:39,268 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1193 transitions. Word has length 108 [2021-11-23 03:30:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:39,269 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1193 transitions. [2021-11-23 03:30:39,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 03:30:39,269 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1193 transitions. [2021-11-23 03:30:39,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 03:30:39,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:39,278 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 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] [2021-11-23 03:30:39,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:30:39,279 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:39,280 INFO L85 PathProgramCache]: Analyzing trace with hash 782844242, now seen corresponding path program 1 times [2021-11-23 03:30:39,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:39,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588287176] [2021-11-23 03:30:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:39,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 03:30:39,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:39,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588287176] [2021-11-23 03:30:39,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588287176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:30:39,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598959758] [2021-11-23 03:30:39,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:39,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:30:39,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:30:39,447 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:30:39,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:30:39,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:30:39,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:30:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 03:30:40,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:30:40,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598959758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:40,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:30:40,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-23 03:30:40,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750222672] [2021-11-23 03:30:40,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:40,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:30:40,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:40,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:30:40,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:30:40,133 INFO L87 Difference]: Start difference. First operand 768 states and 1193 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:30:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:40,458 INFO L93 Difference]: Finished difference Result 1602 states and 2536 transitions. [2021-11-23 03:30:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:30:40,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 111 [2021-11-23 03:30:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:40,467 INFO L225 Difference]: With dead ends: 1602 [2021-11-23 03:30:40,467 INFO L226 Difference]: Without dead ends: 846 [2021-11-23 03:30:40,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:30:40,477 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 213 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1308 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 [2021-11-23 03:30:40,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1308 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:30:40,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-11-23 03:30:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 846. [2021-11-23 03:30:40,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 586 states have (on average 1.575085324232082) internal successors, (923), 615 states have internal predecessors, (923), 202 states have call successors, (202), 60 states have call predecessors, (202), 57 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2021-11-23 03:30:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1339 transitions. [2021-11-23 03:30:40,549 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1339 transitions. Word has length 111 [2021-11-23 03:30:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:40,550 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1339 transitions. [2021-11-23 03:30:40,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:30:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1339 transitions. [2021-11-23 03:30:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 03:30:40,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:40,559 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 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] [2021-11-23 03:30:40,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:30:40,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:30:40,773 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:40,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:40,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2008837937, now seen corresponding path program 1 times [2021-11-23 03:30:40,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:40,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253912121] [2021-11-23 03:30:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:40,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-23 03:30:40,884 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:40,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253912121] [2021-11-23 03:30:40,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253912121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:30:40,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071755500] [2021-11-23 03:30:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:40,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:30:40,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:30:40,891 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:30:40,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:30:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:41,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:30:41,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:30:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 03:30:41,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:30:41,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071755500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:41,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:30:41,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 03:30:41,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219592944] [2021-11-23 03:30:41,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:41,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:30:41,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:41,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:30:41,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:30:41,375 INFO L87 Difference]: Start difference. First operand 846 states and 1339 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:30:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:41,689 INFO L93 Difference]: Finished difference Result 1758 states and 2826 transitions. [2021-11-23 03:30:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:30:41,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 116 [2021-11-23 03:30:41,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:41,699 INFO L225 Difference]: With dead ends: 1758 [2021-11-23 03:30:41,699 INFO L226 Difference]: Without dead ends: 924 [2021-11-23 03:30:41,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:30:41,707 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 211 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1308 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 [2021-11-23 03:30:41,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 1308 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:30:41,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-11-23 03:30:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2021-11-23 03:30:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 662 states have (on average 1.6148036253776434) internal successors, (1069), 691 states have internal predecessors, (1069), 202 states have call successors, (202), 62 states have call predecessors, (202), 59 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2021-11-23 03:30:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1485 transitions. [2021-11-23 03:30:41,802 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1485 transitions. Word has length 116 [2021-11-23 03:30:41,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:41,803 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1485 transitions. [2021-11-23 03:30:41,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:30:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1485 transitions. [2021-11-23 03:30:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 03:30:41,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:41,808 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:41,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:30:42,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:30:42,029 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:42,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1280945471, now seen corresponding path program 1 times [2021-11-23 03:30:42,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:42,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397490191] [2021-11-23 03:30:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:42,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-23 03:30:42,125 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:42,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397490191] [2021-11-23 03:30:42,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397490191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:30:42,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440529411] [2021-11-23 03:30:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:42,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:30:42,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:30:42,132 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:30:42,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:30:42,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:42,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:30:42,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:30:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 03:30:42,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:30:42,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440529411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:42,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:30:42,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 03:30:42,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682468253] [2021-11-23 03:30:42,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:42,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:30:42,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:42,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:30:42,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:30:42,584 INFO L87 Difference]: Start difference. First operand 924 states and 1485 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:30:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:42,899 INFO L93 Difference]: Finished difference Result 1914 states and 3116 transitions. [2021-11-23 03:30:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:30:42,900 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 120 [2021-11-23 03:30:42,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:42,909 INFO L225 Difference]: With dead ends: 1914 [2021-11-23 03:30:42,910 INFO L226 Difference]: Without dead ends: 1002 [2021-11-23 03:30:42,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:30:42,917 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 209 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1308 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 [2021-11-23 03:30:42,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1308 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:30:42,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-11-23 03:30:42,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2021-11-23 03:30:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 738 states have (on average 1.646341463414634) internal successors, (1215), 767 states have internal predecessors, (1215), 202 states have call successors, (202), 64 states have call predecessors, (202), 61 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2021-11-23 03:30:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1631 transitions. [2021-11-23 03:30:42,972 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1631 transitions. Word has length 120 [2021-11-23 03:30:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:42,973 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1631 transitions. [2021-11-23 03:30:42,973 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:30:42,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1631 transitions. [2021-11-23 03:30:42,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-23 03:30:42,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:42,980 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:30:43,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:30:43,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 03:30:43,207 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:43,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:43,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1320443278, now seen corresponding path program 1 times [2021-11-23 03:30:43,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:43,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90779558] [2021-11-23 03:30:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:43,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-23 03:30:43,313 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:43,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90779558] [2021-11-23 03:30:43,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90779558] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:30:43,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196337572] [2021-11-23 03:30:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:43,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:30:43,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:30:43,319 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:30:43,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:30:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:43,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:30:43,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:30:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 03:30:43,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:30:43,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196337572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:30:43,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:30:43,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-23 03:30:43,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525099954] [2021-11-23 03:30:43,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:30:43,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:30:43,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:30:43,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:30:43,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:30:43,840 INFO L87 Difference]: Start difference. First operand 1002 states and 1631 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:30:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:30:44,138 INFO L93 Difference]: Finished difference Result 2070 states and 3406 transitions. [2021-11-23 03:30:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:30:44,139 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 123 [2021-11-23 03:30:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:30:44,148 INFO L225 Difference]: With dead ends: 2070 [2021-11-23 03:30:44,148 INFO L226 Difference]: Without dead ends: 1080 [2021-11-23 03:30:44,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:30:44,156 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 207 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1308 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 [2021-11-23 03:30:44,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 1308 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:30:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-11-23 03:30:44,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2021-11-23 03:30:44,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 814 states have (on average 1.671990171990172) internal successors, (1361), 843 states have internal predecessors, (1361), 202 states have call successors, (202), 66 states have call predecessors, (202), 63 states have return successors, (214), 194 states have call predecessors, (214), 199 states have call successors, (214) [2021-11-23 03:30:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1777 transitions. [2021-11-23 03:30:44,210 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1777 transitions. Word has length 123 [2021-11-23 03:30:44,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:30:44,211 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1777 transitions. [2021-11-23 03:30:44,212 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, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 03:30:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1777 transitions. [2021-11-23 03:30:44,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 03:30:44,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:30:44,218 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 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] [2021-11-23 03:30:44,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:30:44,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-23 03:30:44,443 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:30:44,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:30:44,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2027278208, now seen corresponding path program 1 times [2021-11-23 03:30:44,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:30:44,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374978519] [2021-11-23 03:30:44,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:44,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:30:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-23 03:30:44,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:30:44,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374978519] [2021-11-23 03:30:44,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374978519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:30:44,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734339133] [2021-11-23 03:30:44,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:30:44,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:30:44,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:30:44,547 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:30:44,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:30:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:30:44,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 03:30:44,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:30:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-23 03:30:46,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:31:30,657 WARN L227 SmtUtils]: Spent 41.58s 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) [2021-11-23 03:31:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-23 03:31:34,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734339133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:31:34,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [899701166] [2021-11-23 03:31:34,114 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2021-11-23 03:31:34,115 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:31:34,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:31:34,128 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:31:34,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:31:37,361 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-23 03:31:41,650 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2021-11-23 03:31:42,285 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2021-11-23 03:31:55,059 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 66 for LOIs [2021-11-23 03:31:55,070 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 100 for LOIs [2021-11-23 03:31:55,230 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 111 for LOIs [2021-11-23 03:31:55,973 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 437 for LOIs [2021-11-23 03:31:56,786 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 66 for LOIs [2021-11-23 03:31:56,806 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-23 03:31:56,959 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 82 for LOIs [2021-11-23 03:31:57,012 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:32:16,292 WARN L227 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:32:22,504 WARN L227 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:33:23,834 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25729#(and (<= 0 |timeShift_processWaitingOnFloor_#in~floorID#1|) (= |old(~floorButtons_2~0)| 0) (<= ~floorButtons_3~0 0) (= ~executiveFloor~0 4) (= |timeShift_processWaitingOnFloor_~tmp___2~2#1| 0) (= |old(~persons_1~0)| 0) (<= ~currentFloorID~0 0) (<= ~currentHeading~0 1) (= |old(~persons_5~0)| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (= |old(~doorState~0)| 1) (= |old(~persons_2~0)| 0) (= |timeShift_processWaitingOnFloor_~tmp___6~1#1| 0) (= ~persons_5~0 0) (= |old(~persons_4~0)| 0) (<= ~personOnFloor_5_1~0 1) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (= |old(~floorButtons_0~0)| 0) (<= ~weight~0 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= 0 ~floorButtons_2~0) (<= |timeShift_resetFloorButton_#in~floorID#1| 0) (= |timeShift_processWaitingOnFloor_~tmp___0~5#1| 0) (<= ~calls_0~0 0) (= ~head~0.offset 0) (<= 0 ~currentFloorID~0) (<= 1 |timeShift_~tmp___9~2#1|) (= |old(~weight~0)| 0) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 |timeShift_resetFloorButton_#in~floorID#1|) (= ~persons_4~0 0) (<= |timeShift_processWaitingOnFloor_#in~floorID#1| 0) (<= 0 ~floorButtons_3~0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 |timeShift_processWaitingOnFloor_~floorID#1|) (<= 0 |timeShift_resetFloorButton_~floorID#1|) (<= ~floorButtons_2~0 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 0) (= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |old(~persons_0~0)| 0) (<= 0 ~floorButtons_0~0) (= ~doorState~0 1) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (= |timeShift_processWaitingOnFloor_~tmp___10~0#1| 0) (<= 1 ~currentHeading~0) (<= 0 ~calls_0~0) (= |old(~persons_3~0)| 0) (= ~persons_1~0 0) (= ~persons_0~0 0) (= |old(~floorButtons_3~0)| 0) (= ~head~0.base 0) (<= 1 ~personOnFloor_5_1~0) (= |#NULL.offset| 0) (<= ~floorButtons_4~0 0) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= 1 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |old(~currentHeading~0)| 1) (= |timeShift_processWaitingOnFloor_~tmp___8~1#1| 0) (<= |timeShift_resetFloorButton_~floorID#1| 0) (= |old(~personOnFloor_5_1~0)| 1) (= 1 |old(~calls_1~0)|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 ~floorButtons_4~0) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (<= 0 ~weight~0) (<= ~floorButtons_1~0 0) (<= |timeShift_processWaitingOnFloor_~floorID#1| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= ~cleanupTimeShifts~0 12) (= |timeShift_processWaitingOnFloor_~tmp___4~1#1| 0) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2021-11-23 03:33:23,834 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:33:23,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:33:23,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 16] total 32 [2021-11-23 03:33:23,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957918289] [2021-11-23 03:33:23,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:33:23,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 03:33:23,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 03:33:23,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=7029, Unknown=0, NotChecked=0, Total=7832 [2021-11-23 03:33:23,839 INFO L87 Difference]: Start difference. First operand 1080 states and 1777 transitions. Second operand has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2021-11-23 03:33:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:37,274 INFO L93 Difference]: Finished difference Result 3455 states and 5745 transitions. [2021-11-23 03:33:37,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-23 03:33:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) Word has length 125 [2021-11-23 03:33:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:37,292 INFO L225 Difference]: With dead ends: 3455 [2021-11-23 03:33:37,292 INFO L226 Difference]: Without dead ends: 1904 [2021-11-23 03:33:37,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 293 SyntacticMatches, 15 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7438 ImplicationChecksByTransitivity, 90.1s TimeCoverageRelationStatistics Valid=1842, Invalid=17618, Unknown=0, NotChecked=0, Total=19460 [2021-11-23 03:33:37,315 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 5556 mSDsluCounter, 4158 mSDsCounter, 0 mSdLazyCounter, 14690 mSolverCounterSat, 3147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5601 SdHoareTripleChecker+Valid, 4524 SdHoareTripleChecker+Invalid, 17837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3147 IncrementalHoareTripleChecker+Valid, 14690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:37,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5601 Valid, 4524 Invalid, 17837 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3147 Valid, 14690 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2021-11-23 03:33:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-11-23 03:33:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1761. [2021-11-23 03:33:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1262 states have (on average 1.5736925515055467) internal successors, (1986), 1324 states have internal predecessors, (1986), 372 states have call successors, (372), 132 states have call predecessors, (372), 126 states have return successors, (414), 352 states have call predecessors, (414), 369 states have call successors, (414) [2021-11-23 03:33:37,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2772 transitions. [2021-11-23 03:33:37,437 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2772 transitions. Word has length 125 [2021-11-23 03:33:37,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:37,438 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 2772 transitions. [2021-11-23 03:33:37,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 23 states have (on average 7.434782608695652) internal successors, (171), 24 states have internal predecessors, (171), 9 states have call successors, (47), 8 states have call predecessors, (47), 15 states have return successors, (46), 16 states have call predecessors, (46), 9 states have call successors, (46) [2021-11-23 03:33:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2772 transitions. [2021-11-23 03:33:37,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-23 03:33:37,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:37,475 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:37,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:37,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:37,689 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:37,692 INFO L85 PathProgramCache]: Analyzing trace with hash -654703038, now seen corresponding path program 1 times [2021-11-23 03:33:37,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:37,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343454425] [2021-11-23 03:33:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:37,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-23 03:33:37,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:37,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343454425] [2021-11-23 03:33:37,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343454425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:33:37,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296617364] [2021-11-23 03:33:37,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:37,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:37,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:37,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:33:37,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:33:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:33:38,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-23 03:33:38,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:33:38,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296617364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:33:38,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:33:38,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-23 03:33:38,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403145706] [2021-11-23 03:33:38,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:33:38,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:33:38,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:33:38,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:33:38,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:33:38,344 INFO L87 Difference]: Start difference. First operand 1761 states and 2772 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:33:39,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:33:39,149 INFO L93 Difference]: Finished difference Result 3327 states and 5238 transitions. [2021-11-23 03:33:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:33:39,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 130 [2021-11-23 03:33:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:33:39,165 INFO L225 Difference]: With dead ends: 3327 [2021-11-23 03:33:39,165 INFO L226 Difference]: Without dead ends: 1579 [2021-11-23 03:33:39,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:33:39,179 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 340 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:33:39,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 1986 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 03:33:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-11-23 03:33:39,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1555. [2021-11-23 03:33:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1134 states have (on average 1.5864197530864197) internal successors, (1799), 1180 states have internal predecessors, (1799), 309 states have call successors, (309), 116 states have call predecessors, (309), 111 states have return successors, (338), 294 states have call predecessors, (338), 306 states have call successors, (338) [2021-11-23 03:33:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2446 transitions. [2021-11-23 03:33:39,282 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2446 transitions. Word has length 130 [2021-11-23 03:33:39,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:33:39,282 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 2446 transitions. [2021-11-23 03:33:39,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:33:39,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2446 transitions. [2021-11-23 03:33:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-23 03:33:39,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:33:39,294 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:33:39,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:33:39,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:39,507 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:33:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:33:39,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1376275609, now seen corresponding path program 1 times [2021-11-23 03:33:39,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:33:39,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798823882] [2021-11-23 03:33:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:39,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:33:39,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-23 03:33:39,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:33:39,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798823882] [2021-11-23 03:33:39,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798823882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:33:39,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279076092] [2021-11-23 03:33:39,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:33:39,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:33:39,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:33:39,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:33:39,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:33:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:33:40,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:33:40,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:33:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 93 proven. 18 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-11-23 03:33:40,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:33:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 03:33:41,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279076092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:33:41,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829511661] [2021-11-23 03:33:41,392 INFO L159 IcfgInterpreter]: Started Sifa with 114 locations of interest [2021-11-23 03:33:41,393 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:33:41,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:33:41,394 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:33:41,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:33:48,060 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2021-11-23 03:33:58,119 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-23 03:33:58,210 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 50 for LOIs [2021-11-23 03:33:58,309 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 83 for LOIs [2021-11-23 03:33:58,613 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2021-11-23 03:33:58,682 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2021-11-23 03:33:58,693 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 90 for LOIs [2021-11-23 03:33:58,710 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-23 03:33:58,713 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-23 03:34:02,082 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2021-11-23 03:34:02,615 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-23 03:34:02,691 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-23 03:34:02,696 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-23 03:34:02,840 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:34:20,977 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:34:27,109 WARN L227 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:34:45,988 WARN L227 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 659 DAG size of output: 562 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:35:13,715 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41293#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 |#NULL.base|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= 0 ~head~0.offset) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 4 ~executiveFloor~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 12 ~cleanupTimeShifts~0) (<= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1| 2147483647) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|))' at error location [2021-11-23 03:35:13,715 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:35:13,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:35:13,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 30 [2021-11-23 03:35:13,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420477364] [2021-11-23 03:35:13,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:35:13,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 03:35:13,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:35:13,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 03:35:13,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1147, Invalid=13373, Unknown=0, NotChecked=0, Total=14520 [2021-11-23 03:35:13,731 INFO L87 Difference]: Start difference. First operand 1555 states and 2446 transitions. Second operand has 30 states, 24 states have (on average 8.5) internal successors, (204), 26 states have internal predecessors, (204), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) [2021-11-23 03:35:29,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:35:29,002 INFO L93 Difference]: Finished difference Result 5077 states and 8200 transitions. [2021-11-23 03:35:29,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-23 03:35:29,003 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 8.5) internal successors, (204), 26 states have internal predecessors, (204), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) Word has length 242 [2021-11-23 03:35:29,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:35:29,040 INFO L225 Difference]: With dead ends: 5077 [2021-11-23 03:35:29,040 INFO L226 Difference]: Without dead ends: 3721 [2021-11-23 03:35:29,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 649 SyntacticMatches, 8 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12058 ImplicationChecksByTransitivity, 72.9s TimeCoverageRelationStatistics Valid=2220, Invalid=29642, Unknown=0, NotChecked=0, Total=31862 [2021-11-23 03:35:29,069 INFO L933 BasicCegarLoop]: 884 mSDtfsCounter, 7217 mSDsluCounter, 6030 mSDsCounter, 0 mSdLazyCounter, 21544 mSolverCounterSat, 4904 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7229 SdHoareTripleChecker+Valid, 6395 SdHoareTripleChecker+Invalid, 26448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4904 IncrementalHoareTripleChecker+Valid, 21544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:35:29,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7229 Valid, 6395 Invalid, 26448 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4904 Valid, 21544 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2021-11-23 03:35:29,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2021-11-23 03:35:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3444. [2021-11-23 03:35:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 2505 states have (on average 1.5497005988023953) internal successors, (3882), 2598 states have internal predecessors, (3882), 663 states have call successors, (663), 284 states have call predecessors, (663), 275 states have return successors, (780), 633 states have call predecessors, (780), 655 states have call successors, (780) [2021-11-23 03:35:29,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 5325 transitions. [2021-11-23 03:35:29,322 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 5325 transitions. Word has length 242 [2021-11-23 03:35:29,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:35:29,323 INFO L470 AbstractCegarLoop]: Abstraction has 3444 states and 5325 transitions. [2021-11-23 03:35:29,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 8.5) internal successors, (204), 26 states have internal predecessors, (204), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) [2021-11-23 03:35:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 5325 transitions. [2021-11-23 03:35:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-23 03:35:29,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:35:29,349 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:35:29,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:35:29,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:35:29,575 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:35:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:35:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash -176587744, now seen corresponding path program 1 times [2021-11-23 03:35:29,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:35:29,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917241693] [2021-11-23 03:35:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:29,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:35:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2021-11-23 03:35:29,811 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:35:29,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917241693] [2021-11-23 03:35:29,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917241693] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:35:29,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957508483] [2021-11-23 03:35:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:35:29,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:35:29,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:35:29,813 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:35:29,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:35:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:35:30,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:35:30,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:35:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 68 proven. 10 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-23 03:35:30,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:35:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-23 03:35:31,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957508483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:35:31,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [251963527] [2021-11-23 03:35:31,084 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2021-11-23 03:35:31,085 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:35:31,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:35:31,086 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:35:31,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:35:36,212 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2021-11-23 03:35:45,852 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-23 03:35:45,945 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 50 for LOIs [2021-11-23 03:35:46,037 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 83 for LOIs [2021-11-23 03:35:46,403 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2021-11-23 03:35:46,475 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2021-11-23 03:35:46,486 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 90 for LOIs [2021-11-23 03:35:46,503 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-23 03:35:46,506 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-23 03:35:49,817 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2021-11-23 03:35:50,483 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-23 03:35:50,539 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-23 03:35:50,543 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-23 03:35:50,687 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:36:08,714 WARN L227 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:36:15,082 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:36:34,163 WARN L227 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 659 DAG size of output: 562 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:37:02,191 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54208#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 (+ ~currentFloorID~0 2147483648)) (<= 0 |#NULL.base|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= 0 ~head~0.offset) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= ~currentFloorID~0 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 4 ~executiveFloor~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 12 ~cleanupTimeShifts~0) (<= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|))' at error location [2021-11-23 03:37:02,191 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:37:02,191 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:37:02,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2021-11-23 03:37:02,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139769333] [2021-11-23 03:37:02,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:37:02,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 03:37:02,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:02,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 03:37:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=12469, Unknown=0, NotChecked=0, Total=13572 [2021-11-23 03:37:02,196 INFO L87 Difference]: Start difference. First operand 3444 states and 5325 transitions. Second operand has 26 states, 20 states have (on average 10.25) internal successors, (205), 22 states have internal predecessors, (205), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2021-11-23 03:37:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:17,557 INFO L93 Difference]: Finished difference Result 9635 states and 15053 transitions. [2021-11-23 03:37:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-23 03:37:17,558 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 10.25) internal successors, (205), 22 states have internal predecessors, (205), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) Word has length 192 [2021-11-23 03:37:17,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:17,605 INFO L225 Difference]: With dead ends: 9635 [2021-11-23 03:37:17,606 INFO L226 Difference]: Without dead ends: 5236 [2021-11-23 03:37:17,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 503 SyntacticMatches, 8 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12512 ImplicationChecksByTransitivity, 73.4s TimeCoverageRelationStatistics Valid=2318, Invalid=28834, Unknown=0, NotChecked=0, Total=31152 [2021-11-23 03:37:17,643 INFO L933 BasicCegarLoop]: 912 mSDtfsCounter, 7418 mSDsluCounter, 4749 mSDsCounter, 0 mSdLazyCounter, 17712 mSolverCounterSat, 5827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7438 SdHoareTripleChecker+Valid, 5247 SdHoareTripleChecker+Invalid, 23539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5827 IncrementalHoareTripleChecker+Valid, 17712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:17,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7438 Valid, 5247 Invalid, 23539 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5827 Valid, 17712 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2021-11-23 03:37:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2021-11-23 03:37:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 4837. [2021-11-23 03:37:18,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4837 states, 3498 states have (on average 1.4734133790737565) internal successors, (5154), 3584 states have internal predecessors, (5154), 907 states have call successors, (907), 440 states have call predecessors, (907), 431 states have return successors, (1103), 872 states have call predecessors, (1103), 896 states have call successors, (1103) [2021-11-23 03:37:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4837 states to 4837 states and 7164 transitions. [2021-11-23 03:37:18,087 INFO L78 Accepts]: Start accepts. Automaton has 4837 states and 7164 transitions. Word has length 192 [2021-11-23 03:37:18,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:18,088 INFO L470 AbstractCegarLoop]: Abstraction has 4837 states and 7164 transitions. [2021-11-23 03:37:18,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 10.25) internal successors, (205), 22 states have internal predecessors, (205), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2021-11-23 03:37:18,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4837 states and 7164 transitions. [2021-11-23 03:37:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2021-11-23 03:37:18,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:18,147 INFO L514 BasicCegarLoop]: trace histogram [14, 12, 12, 10, 10, 10, 10, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 03:37:18,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:18,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 03:37:18,362 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:18,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:18,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1752383663, now seen corresponding path program 1 times [2021-11-23 03:37:18,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:18,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384886048] [2021-11-23 03:37:18,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:18,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:18,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 79 proven. 30 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2021-11-23 03:37:18,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:18,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384886048] [2021-11-23 03:37:18,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384886048] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:18,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848935115] [2021-11-23 03:37:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:18,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:18,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:18,576 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:18,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:37:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:19,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 3127 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:37:19,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:19,612 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2021-11-23 03:37:19,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:37:19,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848935115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:19,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:37:19,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 03:37:19,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064981094] [2021-11-23 03:37:19,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:19,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:37:19,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:19,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:37:19,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:37:19,615 INFO L87 Difference]: Start difference. First operand 4837 states and 7164 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-23 03:37:20,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:20,005 INFO L93 Difference]: Finished difference Result 8006 states and 11891 transitions. [2021-11-23 03:37:20,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:37:20,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 384 [2021-11-23 03:37:20,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:20,050 INFO L225 Difference]: With dead ends: 8006 [2021-11-23 03:37:20,050 INFO L226 Difference]: Without dead ends: 4747 [2021-11-23 03:37:20,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:37:20,068 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 402 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:20,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 977 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:37:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2021-11-23 03:37:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 4725. [2021-11-23 03:37:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4725 states, 3405 states have (on average 1.4625550660792952) internal successors, (4980), 3489 states have internal predecessors, (4980), 891 states have call successors, (891), 438 states have call predecessors, (891), 428 states have return successors, (1069), 857 states have call predecessors, (1069), 880 states have call successors, (1069) [2021-11-23 03:37:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4725 states to 4725 states and 6940 transitions. [2021-11-23 03:37:20,468 INFO L78 Accepts]: Start accepts. Automaton has 4725 states and 6940 transitions. Word has length 384 [2021-11-23 03:37:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:20,469 INFO L470 AbstractCegarLoop]: Abstraction has 4725 states and 6940 transitions. [2021-11-23 03:37:20,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2021-11-23 03:37:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 4725 states and 6940 transitions. [2021-11-23 03:37:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2021-11-23 03:37:20,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:20,521 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-11-23 03:37:20,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:37:20,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 03:37:20,747 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:20,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:20,747 INFO L85 PathProgramCache]: Analyzing trace with hash 992066684, now seen corresponding path program 1 times [2021-11-23 03:37:20,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:20,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742566437] [2021-11-23 03:37:20,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:20,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2021-11-23 03:37:21,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:21,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742566437] [2021-11-23 03:37:21,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742566437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:21,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:37:21,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:37:21,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541248651] [2021-11-23 03:37:21,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:21,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:37:21,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:21,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:37:21,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:37:21,015 INFO L87 Difference]: Start difference. First operand 4725 states and 6940 transitions. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-23 03:37:21,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:21,476 INFO L93 Difference]: Finished difference Result 9296 states and 13724 transitions. [2021-11-23 03:37:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:37:21,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) Word has length 316 [2021-11-23 03:37:21,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:21,530 INFO L225 Difference]: With dead ends: 9296 [2021-11-23 03:37:21,530 INFO L226 Difference]: Without dead ends: 4940 [2021-11-23 03:37:21,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:37:21,555 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 17 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2577 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:21,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 2577 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:37:21,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4940 states. [2021-11-23 03:37:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4940 to 4860. [2021-11-23 03:37:21,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4860 states, 3503 states have (on average 1.4490436768484156) internal successors, (5076), 3611 states have internal predecessors, (5076), 889 states have call successors, (889), 438 states have call predecessors, (889), 467 states have return successors, (1119), 870 states have call predecessors, (1119), 878 states have call successors, (1119) [2021-11-23 03:37:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4860 states to 4860 states and 7084 transitions. [2021-11-23 03:37:21,922 INFO L78 Accepts]: Start accepts. Automaton has 4860 states and 7084 transitions. Word has length 316 [2021-11-23 03:37:21,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:21,923 INFO L470 AbstractCegarLoop]: Abstraction has 4860 states and 7084 transitions. [2021-11-23 03:37:21,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 5 states have internal predecessors, (102), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-23 03:37:21,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4860 states and 7084 transitions. [2021-11-23 03:37:21,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-23 03:37:21,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:21,971 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 8, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:37:21,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:37:21,972 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:21,973 INFO L85 PathProgramCache]: Analyzing trace with hash 368239106, now seen corresponding path program 1 times [2021-11-23 03:37:21,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:21,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813565100] [2021-11-23 03:37:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:21,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2021-11-23 03:37:22,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:22,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813565100] [2021-11-23 03:37:22,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813565100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:37:22,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535188551] [2021-11-23 03:37:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:22,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:37:22,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:22,266 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:37:22,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:37:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:22,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 2950 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:37:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:37:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 132 proven. 26 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2021-11-23 03:37:23,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:37:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2021-11-23 03:37:24,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535188551] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:37:24,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1779260098] [2021-11-23 03:37:24,203 INFO L159 IcfgInterpreter]: Started Sifa with 124 locations of interest [2021-11-23 03:37:24,204 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:37:24,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:37:24,205 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:37:24,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:37:32,133 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2021-11-23 03:37:32,627 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2021-11-23 03:37:37,242 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-23 03:37:37,357 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 28 for LOIs [2021-11-23 03:37:37,402 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 83 for LOIs [2021-11-23 03:37:37,660 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2021-11-23 03:37:37,717 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2021-11-23 03:37:37,736 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 90 for LOIs [2021-11-23 03:37:37,753 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-23 03:37:37,756 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-23 03:37:41,126 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-23 03:37:41,203 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-23 03:37:41,209 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2021-11-23 03:37:43,589 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2021-11-23 03:37:47,762 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2021-11-23 03:37:48,155 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:38:03,552 WARN L227 SmtUtils]: Spent 7.89s on a formula simplification. DAG size of input: 631 DAG size of output: 508 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:38:13,359 WARN L227 SmtUtils]: Spent 8.79s on a formula simplification. DAG size of input: 671 DAG size of output: 522 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:38:19,547 WARN L227 SmtUtils]: Spent 5.84s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:38:25,557 WARN L227 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:38:34,200 WARN L227 SmtUtils]: Spent 7.16s on a formula simplification. DAG size of input: 778 DAG size of output: 644 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:38:41,562 WARN L227 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 777 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:39:47,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '115156#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 0)) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 (+ ~currentFloorID~0 2147483648)) (<= 0 |#NULL.base|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 0)) (<= 0 ~head~0.offset) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1| 2147483647) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~6#1|)) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|) (<= ~currentFloorID~0 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 4 ~executiveFloor~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483647) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 12 ~cleanupTimeShifts~0) (<= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| 0) (<= 0 |timeShift_~tmp___9~2#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~8#1|)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~12#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~27#1|) (<= 0 ~head~0.base) (<= |#NULL.base| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= ~maximumWeight~0 100) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~9#1| 2147483648)) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (<= 100 ~maximumWeight~0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|))' at error location [2021-11-23 03:39:47,184 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:39:47,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:39:47,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-11-23 03:39:47,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256515141] [2021-11-23 03:39:47,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:39:47,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 03:39:47,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:47,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 03:39:47,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=13354, Unknown=0, NotChecked=0, Total=14520 [2021-11-23 03:39:47,188 INFO L87 Difference]: Start difference. First operand 4860 states and 7084 transitions. Second operand has 25 states, 19 states have (on average 10.789473684210526) internal successors, (205), 22 states have internal predecessors, (205), 11 states have call successors, (76), 6 states have call predecessors, (76), 9 states have return successors, (71), 11 states have call predecessors, (71), 11 states have call successors, (71) [2021-11-23 03:39:53,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:53,133 INFO L93 Difference]: Finished difference Result 8655 states and 12669 transitions. [2021-11-23 03:39:53,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 03:39:53,134 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 10.789473684210526) internal successors, (205), 22 states have internal predecessors, (205), 11 states have call successors, (76), 6 states have call predecessors, (76), 9 states have return successors, (71), 11 states have call predecessors, (71), 11 states have call successors, (71) Word has length 317 [2021-11-23 03:39:53,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:53,169 INFO L225 Difference]: With dead ends: 8655 [2021-11-23 03:39:53,169 INFO L226 Difference]: Without dead ends: 5613 [2021-11-23 03:39:53,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 817 SyntacticMatches, 38 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9029 ImplicationChecksByTransitivity, 120.3s TimeCoverageRelationStatistics Valid=1504, Invalid=18518, Unknown=0, NotChecked=0, Total=20022 [2021-11-23 03:39:53,189 INFO L933 BasicCegarLoop]: 1160 mSDtfsCounter, 2343 mSDsluCounter, 12200 mSDsCounter, 0 mSdLazyCounter, 8232 mSolverCounterSat, 1699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2363 SdHoareTripleChecker+Valid, 12295 SdHoareTripleChecker+Invalid, 9931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1699 IncrementalHoareTripleChecker+Valid, 8232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:53,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2363 Valid, 12295 Invalid, 9931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1699 Valid, 8232 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-23 03:39:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5613 states. [2021-11-23 03:39:53,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5613 to 5489. [2021-11-23 03:39:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5489 states, 3966 states have (on average 1.4147755925365608) internal successors, (5611), 4084 states have internal predecessors, (5611), 985 states have call successors, (985), 498 states have call predecessors, (985), 537 states have return successors, (1307), 966 states have call predecessors, (1307), 974 states have call successors, (1307) [2021-11-23 03:39:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 7903 transitions. [2021-11-23 03:39:53,566 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 7903 transitions. Word has length 317 [2021-11-23 03:39:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:53,568 INFO L470 AbstractCegarLoop]: Abstraction has 5489 states and 7903 transitions. [2021-11-23 03:39:53,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 10.789473684210526) internal successors, (205), 22 states have internal predecessors, (205), 11 states have call successors, (76), 6 states have call predecessors, (76), 9 states have return successors, (71), 11 states have call predecessors, (71), 11 states have call successors, (71) [2021-11-23 03:39:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 7903 transitions. [2021-11-23 03:39:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-11-23 03:39:53,607 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:53,607 INFO L514 BasicCegarLoop]: trace histogram [13, 11, 11, 11, 11, 8, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:39:53,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:39:53,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 03:39:53,831 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1885188726, now seen corresponding path program 1 times [2021-11-23 03:39:53,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:53,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969787555] [2021-11-23 03:39:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:53,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:54,246 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 61 proven. 55 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-11-23 03:39:54,246 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:54,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969787555] [2021-11-23 03:39:54,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969787555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:39:54,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137633479] [2021-11-23 03:39:54,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:54,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:54,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:39:54,248 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:39:54,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2902923a-bc90-4c21-a17a-8e347ecc7ee6/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:39:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:54,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 2969 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 03:39:54,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:39:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 137 proven. 34 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-11-23 03:39:55,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:39:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2021-11-23 03:39:56,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137633479] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:39:56,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [508187660] [2021-11-23 03:39:56,288 INFO L159 IcfgInterpreter]: Started Sifa with 122 locations of interest [2021-11-23 03:39:56,289 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:39:56,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:39:56,290 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:39:56,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:03,036 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2021-11-23 03:40:03,436 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2021-11-23 03:40:05,384 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-23 03:40:05,473 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 28 for LOIs [2021-11-23 03:40:05,512 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 88 for LOIs [2021-11-23 03:40:05,780 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 28 for LOIs [2021-11-23 03:40:05,835 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 55 for LOIs [2021-11-23 03:40:05,855 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 73 for LOIs [2021-11-23 03:40:05,871 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-23 03:40:05,877 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-23 03:40:09,215 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-23 03:40:09,290 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-23 03:40:09,294 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2021-11-23 03:40:11,474 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2021-11-23 03:40:15,368 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2021-11-23 03:40:15,763 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:30,671 WARN L227 SmtUtils]: Spent 7.62s on a formula simplification. DAG size of input: 631 DAG size of output: 508 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:40:39,722 WARN L227 SmtUtils]: Spent 7.95s on a formula simplification. DAG size of input: 671 DAG size of output: 522 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:40:45,646 WARN L227 SmtUtils]: Spent 5.53s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:40:51,501 WARN L227 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 645 DAG size of output: 592 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:41:00,332 WARN L227 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 778 DAG size of output: 644 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:41:07,228 WARN L227 SmtUtils]: Spent 5.56s on a formula simplification that was a NOOP. DAG size: 777 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)