./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5643166a994eeb2bd259cf18f0a4b43a93b8e6b433c116ad537f0a1a02a75ec3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:02:47,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:02:47,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:02:47,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:02:47,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:02:47,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:02:47,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:02:47,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:02:47,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:02:48,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:02:48,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:02:48,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:02:48,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:02:48,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:02:48,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:02:48,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:02:48,024 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:02:48,025 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:02:48,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:02:48,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:02:48,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:02:48,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:02:48,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:02:48,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:02:48,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:02:48,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:02:48,056 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:02:48,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:02:48,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:02:48,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:02:48,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:02:48,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:02:48,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:02:48,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:02:48,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:02:48,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:02:48,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:02:48,064 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:02:48,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:02:48,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:02:48,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:02:48,069 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:02:48,112 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:02:48,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:02:48,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:02:48,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:02:48,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:02:48,124 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:02:48,124 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:02:48,124 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:02:48,124 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:02:48,124 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:02:48,125 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:02:48,125 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:02:48,126 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:02:48,126 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:02:48,126 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:02:48,126 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:02:48,126 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:02:48,127 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:02:48,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:02:48,128 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:02:48,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:02:48,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:02:48,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:02:48,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:02:48,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:02:48,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:02:48,129 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:02:48,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:02:48,130 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:02:48,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:02:48,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:02:48,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:02:48,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:02:48,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:02:48,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:02:48,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:02:48,133 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:02:48,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:02:48,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:02:48,134 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:02:48,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:02:48,134 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_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5643166a994eeb2bd259cf18f0a4b43a93b8e6b433c116ad537f0a1a02a75ec3 [2021-11-25 19:02:48,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:02:48,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:02:48,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:02:48,411 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:02:48,411 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:02:48,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c [2021-11-25 19:02:48,469 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/data/90674681b/54a0bfdba61041a29f5cff5205142f38/FLAG298d9cef4 [2021-11-25 19:02:49,091 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:02:49,091 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c [2021-11-25 19:02:49,109 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/data/90674681b/54a0bfdba61041a29f5cff5205142f38/FLAG298d9cef4 [2021-11-25 19:02:49,278 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/data/90674681b/54a0bfdba61041a29f5cff5205142f38 [2021-11-25 19:02:49,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:02:49,282 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:02:49,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:02:49,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:02:49,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:02:49,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:02:49" (1/1) ... [2021-11-25 19:02:49,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2131517b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:49, skipping insertion in model container [2021-11-25 19:02:49,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:02:49" (1/1) ... [2021-11-25 19:02:49,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:02:49,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:02:49,914 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_546a87bd-db11-4362-95ca-3759c0209e51/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c[49225,49238] [2021-11-25 19:02:49,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:02:50,003 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:02:50,139 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_546a87bd-db11-4362-95ca-3759c0209e51/sv-benchmarks/c/product-lines/elevator_spec14_product19.cil.c[49225,49238] [2021-11-25 19:02:50,163 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:02:50,188 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:02:50,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:50 WrapperNode [2021-11-25 19:02:50,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:02:50,190 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:02:50,190 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:02:50,190 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:02:50,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:50" (1/1) ... [2021-11-25 19:02:50,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:50" (1/1) ... [2021-11-25 19:02:50,297 INFO L137 Inliner]: procedures = 91, calls = 333, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 1051 [2021-11-25 19:02:50,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:02:50,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:02:50,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:02:50,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:02:50,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:50" (1/1) ... [2021-11-25 19:02:50,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:50" (1/1) ... [2021-11-25 19:02:50,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:50" (1/1) ... [2021-11-25 19:02:50,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:50" (1/1) ... [2021-11-25 19:02:50,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:50" (1/1) ... [2021-11-25 19:02:50,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:50" (1/1) ... [2021-11-25 19:02:50,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:50" (1/1) ... [2021-11-25 19:02:50,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:02:50,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:02:50,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:02:50,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:02:50,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:50" (1/1) ... [2021-11-25 19:02:50,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:02:50,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:50,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:02:50,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:02:50,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:02:50,507 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 19:02:50,507 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 19:02:50,507 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 19:02:50,508 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 19:02:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-25 19:02:50,508 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__weight [2021-11-25 19:02:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 19:02:50,508 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 19:02:50,508 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 19:02:50,508 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 19:02:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 19:02:50,509 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 19:02:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 19:02:50,509 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 19:02:50,509 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 19:02:50,509 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 19:02:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 19:02:50,510 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 19:02:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 19:02:50,510 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 19:02:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 19:02:50,510 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 19:02:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 19:02:50,511 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 19:02:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 19:02:50,511 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 19:02:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 19:02:50,511 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 19:02:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 19:02:50,512 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 19:02:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 19:02:50,512 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 19:02:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 19:02:50,512 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 19:02:50,512 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 19:02:50,513 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 19:02:50,513 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 19:02:50,513 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 19:02:50,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:02:50,513 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 19:02:50,513 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 19:02:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 19:02:50,514 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 19:02:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 19:02:50,514 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 19:02:50,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:02:50,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:02:50,515 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 19:02:50,515 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 19:02:50,647 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:02:50,649 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:02:51,904 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:02:52,553 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:02:52,554 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:02:52,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:02:52 BoogieIcfgContainer [2021-11-25 19:02:52,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:02:52,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:02:52,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:02:52,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:02:52,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:02:49" (1/3) ... [2021-11-25 19:02:52,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5006e1c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:02:52, skipping insertion in model container [2021-11-25 19:02:52,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:50" (2/3) ... [2021-11-25 19:02:52,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5006e1c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:02:52, skipping insertion in model container [2021-11-25 19:02:52,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:02:52" (3/3) ... [2021-11-25 19:02:52,568 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product19.cil.c [2021-11-25 19:02:52,576 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:02:52,576 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:02:52,644 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:02:52,653 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:02:52,653 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:02:52,691 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) [2021-11-25 19:02:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-25 19:02:52,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:52,725 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] [2021-11-25 19:02:52,725 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:52,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:52,731 INFO L85 PathProgramCache]: Analyzing trace with hash 724049478, now seen corresponding path program 1 times [2021-11-25 19:02:52,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:52,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071224483] [2021-11-25 19:02:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:52,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 19:02:53,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:53,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071224483] [2021-11-25 19:02:53,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071224483] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:02:53,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:02:53,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:02:53,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347177126] [2021-11-25 19:02:53,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:53,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:02:53,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:53,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:02:53,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:02:53,306 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) [2021-11-25 19:02:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:54,217 INFO L93 Difference]: Finished difference Result 1037 states and 1657 transitions. [2021-11-25 19:02:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:02:54,220 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 [2021-11-25 19:02:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:54,257 INFO L225 Difference]: With dead ends: 1037 [2021-11-25 19:02:54,257 INFO L226 Difference]: Without dead ends: 685 [2021-11-25 19:02:54,269 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 [2021-11-25 19:02:54,274 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, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:54,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 2306 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 19:02:54,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-11-25 19:02:54,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 679. [2021-11-25 19:02:54,425 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) [2021-11-25 19:02:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1076 transitions. [2021-11-25 19:02:54,437 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1076 transitions. Word has length 73 [2021-11-25 19:02:54,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:54,438 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 1076 transitions. [2021-11-25 19:02:54,439 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) [2021-11-25 19:02:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1076 transitions. [2021-11-25 19:02:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-25 19:02:54,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:54,445 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] [2021-11-25 19:02:54,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:02:54,446 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:54,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:54,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2105617581, now seen corresponding path program 1 times [2021-11-25 19:02:54,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:54,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672559329] [2021-11-25 19:02:54,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:54,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 19:02:55,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:55,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672559329] [2021-11-25 19:02:55,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672559329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:55,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009096446] [2021-11-25 19:02:55,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:55,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:55,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:55,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:55,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:02:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:55,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:02:55,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:02:55,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-25 19:02:56,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009096446] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:56,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:02:56,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [19, 4] total 23 [2021-11-25 19:02:56,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478571584] [2021-11-25 19:02:56,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:56,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:02:56,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:56,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:02:56,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:02:56,016 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) [2021-11-25 19:02:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:56,719 INFO L93 Difference]: Finished difference Result 776 states and 1223 transitions. [2021-11-25 19:02:56,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:02:56,720 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 [2021-11-25 19:02:56,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:56,730 INFO L225 Difference]: With dead ends: 776 [2021-11-25 19:02:56,730 INFO L226 Difference]: Without dead ends: 774 [2021-11-25 19:02:56,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:02:56,733 INFO L933 BasicCegarLoop]: 559 mSDtfsCounter, 830 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:56,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 1299 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:02:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-11-25 19:02:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 764. [2021-11-25 19:02:56,807 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) [2021-11-25 19:02:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1189 transitions. [2021-11-25 19:02:56,833 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1189 transitions. Word has length 77 [2021-11-25 19:02:56,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:56,834 INFO L470 AbstractCegarLoop]: Abstraction has 764 states and 1189 transitions. [2021-11-25 19:02:56,839 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) [2021-11-25 19:02:56,839 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1189 transitions. [2021-11-25 19:02:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 19:02:56,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:56,849 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] [2021-11-25 19:02:56,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:57,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:57,052 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash -995897220, now seen corresponding path program 1 times [2021-11-25 19:02:57,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:57,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306988923] [2021-11-25 19:02:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:57,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:57,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-25 19:02:57,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:57,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306988923] [2021-11-25 19:02:57,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306988923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:02:57,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:02:57,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:02:57,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134653024] [2021-11-25 19:02:57,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:57,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:02:57,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:57,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:02:57,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:02:57,180 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) [2021-11-25 19:02:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:57,371 INFO L93 Difference]: Finished difference Result 1554 states and 2447 transitions. [2021-11-25 19:02:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:02:57,372 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 [2021-11-25 19:02:57,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:57,379 INFO L225 Difference]: With dead ends: 1554 [2021-11-25 19:02:57,379 INFO L226 Difference]: Without dead ends: 802 [2021-11-25 19:02:57,386 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 [2021-11-25 19:02:57,390 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, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:57,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1534 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:02:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2021-11-25 19:02:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 768. [2021-11-25 19:02:57,468 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) [2021-11-25 19:02:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1193 transitions. [2021-11-25 19:02:57,484 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1193 transitions. Word has length 108 [2021-11-25 19:02:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:57,486 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 1193 transitions. [2021-11-25 19:02:57,487 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) [2021-11-25 19:02:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1193 transitions. [2021-11-25 19:02:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-25 19:02:57,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:57,494 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] [2021-11-25 19:02:57,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:02:57,495 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:57,496 INFO L85 PathProgramCache]: Analyzing trace with hash 366160612, now seen corresponding path program 1 times [2021-11-25 19:02:57,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:57,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779542986] [2021-11-25 19:02:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:57,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-25 19:02:57,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:57,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779542986] [2021-11-25 19:02:57,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779542986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:57,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693761201] [2021-11-25 19:02:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:57,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:57,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:57,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:57,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:02:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:57,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:02:57,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 19:02:58,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:02:58,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693761201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:02:58,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:02:58,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 19:02:58,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230912294] [2021-11-25 19:02:58,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:58,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:02:58,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:58,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:02:58,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:02:58,123 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) [2021-11-25 19:02:58,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:58,462 INFO L93 Difference]: Finished difference Result 1602 states and 2536 transitions. [2021-11-25 19:02:58,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:02:58,463 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 [2021-11-25 19:02:58,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:58,470 INFO L225 Difference]: With dead ends: 1602 [2021-11-25 19:02:58,470 INFO L226 Difference]: Without dead ends: 846 [2021-11-25 19:02:58,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:02:58,481 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, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:58,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 1308 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:02:58,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-11-25 19:02:58,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 846. [2021-11-25 19:02:58,523 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) [2021-11-25 19:02:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1339 transitions. [2021-11-25 19:02:58,538 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1339 transitions. Word has length 111 [2021-11-25 19:02:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:58,539 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 1339 transitions. [2021-11-25 19:02:58,539 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) [2021-11-25 19:02:58,539 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1339 transitions. [2021-11-25 19:02:58,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 19:02:58,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:58,551 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] [2021-11-25 19:02:58,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:58,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:58,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:58,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1901863161, now seen corresponding path program 1 times [2021-11-25 19:02:58,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:58,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550937991] [2021-11-25 19:02:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:58,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-25 19:02:58,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:58,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550937991] [2021-11-25 19:02:58,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550937991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:58,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918354309] [2021-11-25 19:02:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:58,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:58,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:58,888 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:58,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:02:59,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:59,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:02:59,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-25 19:02:59,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:02:59,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918354309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:02:59,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:02:59,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 19:02:59,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133685461] [2021-11-25 19:02:59,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:59,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:02:59,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:02:59,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:02:59,396 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) [2021-11-25 19:02:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:59,706 INFO L93 Difference]: Finished difference Result 1758 states and 2826 transitions. [2021-11-25 19:02:59,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:02:59,708 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 [2021-11-25 19:02:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:59,718 INFO L225 Difference]: With dead ends: 1758 [2021-11-25 19:02:59,718 INFO L226 Difference]: Without dead ends: 924 [2021-11-25 19:02:59,725 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 [2021-11-25 19:02:59,728 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 [2021-11-25 19:02:59,729 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] [2021-11-25 19:02:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-11-25 19:02:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2021-11-25 19:02:59,793 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) [2021-11-25 19:02:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1485 transitions. [2021-11-25 19:02:59,805 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1485 transitions. Word has length 116 [2021-11-25 19:02:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:59,808 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1485 transitions. [2021-11-25 19:02:59,808 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) [2021-11-25 19:02:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1485 transitions. [2021-11-25 19:02:59,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-25 19:02:59,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:59,814 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] [2021-11-25 19:02:59,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:00,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:00,032 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:00,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:00,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1694996329, now seen corresponding path program 1 times [2021-11-25 19:03:00,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:00,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185497998] [2021-11-25 19:03:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:00,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-25 19:03:00,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:00,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185497998] [2021-11-25 19:03:00,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185497998] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:00,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020313529] [2021-11-25 19:03:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:00,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:00,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:00,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:00,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:03:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:03:00,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-25 19:03:00,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:03:00,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020313529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:00,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:03:00,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 19:03:00,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249962360] [2021-11-25 19:03:00,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:00,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:03:00,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:00,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:03:00,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:03:00,672 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) [2021-11-25 19:03:00,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:00,973 INFO L93 Difference]: Finished difference Result 1914 states and 3116 transitions. [2021-11-25 19:03:00,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:03:00,974 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 [2021-11-25 19:03:00,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:00,984 INFO L225 Difference]: With dead ends: 1914 [2021-11-25 19:03:00,984 INFO L226 Difference]: Without dead ends: 1002 [2021-11-25 19:03:00,990 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 [2021-11-25 19:03:00,992 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 [2021-11-25 19:03:00,992 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] [2021-11-25 19:03:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-11-25 19:03:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2021-11-25 19:03:01,038 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) [2021-11-25 19:03:01,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1631 transitions. [2021-11-25 19:03:01,047 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1631 transitions. Word has length 120 [2021-11-25 19:03:01,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:01,048 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 1631 transitions. [2021-11-25 19:03:01,049 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) [2021-11-25 19:03:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1631 transitions. [2021-11-25 19:03:01,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-25 19:03:01,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:01,080 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] [2021-11-25 19:03:01,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:01,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:01,289 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:01,290 INFO L85 PathProgramCache]: Analyzing trace with hash -738476540, now seen corresponding path program 1 times [2021-11-25 19:03:01,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:01,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113161668] [2021-11-25 19:03:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:01,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-25 19:03:01,401 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:01,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113161668] [2021-11-25 19:03:01,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113161668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:01,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536476663] [2021-11-25 19:03:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:01,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:01,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:01,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:01,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:03:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:01,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:03:01,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-25 19:03:01,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:03:01,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536476663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:01,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:03:01,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 19:03:01,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811290752] [2021-11-25 19:03:01,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:01,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:03:01,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:01,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:03:01,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:03:01,895 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) [2021-11-25 19:03:02,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:02,183 INFO L93 Difference]: Finished difference Result 2070 states and 3406 transitions. [2021-11-25 19:03:02,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:03:02,184 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 [2021-11-25 19:03:02,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:02,198 INFO L225 Difference]: With dead ends: 2070 [2021-11-25 19:03:02,199 INFO L226 Difference]: Without dead ends: 1080 [2021-11-25 19:03:02,207 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 [2021-11-25 19:03:02,208 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 [2021-11-25 19:03:02,209 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] [2021-11-25 19:03:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2021-11-25 19:03:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2021-11-25 19:03:02,262 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) [2021-11-25 19:03:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1777 transitions. [2021-11-25 19:03:02,272 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1777 transitions. Word has length 123 [2021-11-25 19:03:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:02,274 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1777 transitions. [2021-11-25 19:03:02,274 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) [2021-11-25 19:03:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1777 transitions. [2021-11-25 19:03:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-25 19:03:02,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:02,281 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] [2021-11-25 19:03:02,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:02,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:02,496 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:02,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:02,497 INFO L85 PathProgramCache]: Analyzing trace with hash -2041905646, now seen corresponding path program 1 times [2021-11-25 19:03:02,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:02,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627788403] [2021-11-25 19:03:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:02,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-25 19:03:02,647 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:02,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627788403] [2021-11-25 19:03:02,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627788403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:02,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792345372] [2021-11-25 19:03:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:02,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:02,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:02,649 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:02,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:03:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:02,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 19:03:02,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-25 19:03:04,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:47,681 WARN L227 SmtUtils]: Spent 40.97s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 234] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2021-11-25 19:03:50,531 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-25 19:03:50,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792345372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:03:50,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1404314540] [2021-11-25 19:03:50,557 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2021-11-25 19:03:50,557 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:03:50,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:03:50,568 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:03:50,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:03:53,266 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 19:03:56,801 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2021-11-25 19:03:57,531 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 570 for LOIs [2021-11-25 19:04:19,166 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 66 for LOIs [2021-11-25 19:04:19,175 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 63 for LOIs [2021-11-25 19:04:19,242 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 111 for LOIs [2021-11-25 19:04:19,901 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-25 19:04:20,036 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 437 for LOIs [2021-11-25 19:04:20,757 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 499 for LOIs [2021-11-25 19:04:20,932 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 112 for LOIs [2021-11-25 19:04:20,955 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:04:38,142 WARN L227 SmtUtils]: Spent 5.35s 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) [2021-11-25 19:04:43,735 WARN L227 SmtUtils]: Spent 5.31s 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) [2021-11-25 19:05:56,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26163#(and (<= 0 |timeShift_processWaitingOnFloor_#in~floorID#1|) (= |old(~floorButtons_2~0)| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (<= ~floorButtons_3~0 0) (= ~executiveFloor~0 4) (= |timeShift_processWaitingOnFloor_~tmp___2~2#1| 0) (= |old(~persons_1~0)| 0) (<= ~currentHeading~0 1) (= |old(~persons_5~0)| 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) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (<= ~personOnFloor_5_1~0 1) (= |old(~floorButtons_0~0)| 0) (<= ~weight~0 0) (<= ~floorButtons_0~0 0) (<= 0 ~floorButtons_1~0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 ~floorButtons_2~0) (<= |timeShift_resetFloorButton_#in~floorID#1| 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (= |timeShift_processWaitingOnFloor_~tmp___0~5#1| 0) (<= ~calls_0~0 0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (= ~head~0.offset 0) (= |old(~weight~0)| 0) (<= 0 |timeShift_resetFloorButton_#in~floorID#1|) (= ~persons_4~0 0) (<= |timeShift_processWaitingOnFloor_#in~floorID#1| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 ~floorButtons_3~0) (<= 0 |timeShift_~tmp___9~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= 0 |timeShift_processWaitingOnFloor_~floorID#1|) (<= 0 |timeShift_resetFloorButton_~floorID#1|) (<= ~floorButtons_2~0 0) (= ~persons_3~0 0) (= |old(~floorButtons_4~0)| 0) (= |old(~persons_0~0)| 0) (<= 0 ~floorButtons_0~0) (= ~doorState~0 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#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) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= 1 ~personOnFloor_5_1~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1| 0) (= |#NULL.offset| 0) (<= ~floorButtons_4~0 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= |timeShift_~tmp___9~2#1| 1) (= |old(~currentHeading~0)| 1) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 0) (= |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|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= ~cleanupTimeShifts~0 12) (= |timeShift_processWaitingOnFloor_~tmp___4~1#1| 0) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2021-11-25 19:05:56,179 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:05:56,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:05:56,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 16] total 32 [2021-11-25 19:05:56,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878133427] [2021-11-25 19:05:56,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:05:56,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-25 19:05:56,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:05:56,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-25 19:05:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=7027, Unknown=0, NotChecked=0, Total=7832 [2021-11-25 19:05:56,185 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) [2021-11-25 19:06:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:08,960 INFO L93 Difference]: Finished difference Result 3455 states and 5745 transitions. [2021-11-25 19:06:08,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-25 19:06:08,961 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 [2021-11-25 19:06:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:08,981 INFO L225 Difference]: With dead ends: 3455 [2021-11-25 19:06:08,981 INFO L226 Difference]: Without dead ends: 1904 [2021-11-25 19:06:09,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 290 SyntacticMatches, 18 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7555 ImplicationChecksByTransitivity, 98.3s TimeCoverageRelationStatistics Valid=1844, Invalid=17616, Unknown=0, NotChecked=0, Total=19460 [2021-11-25 19:06:09,002 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 4154 mSDsluCounter, 4178 mSDsCounter, 0 mSdLazyCounter, 14709 mSolverCounterSat, 2370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4199 SdHoareTripleChecker+Valid, 4543 SdHoareTripleChecker+Invalid, 17079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2370 IncrementalHoareTripleChecker+Valid, 14709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:09,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4199 Valid, 4543 Invalid, 17079 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2370 Valid, 14709 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2021-11-25 19:06:09,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-11-25 19:06:09,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1761. [2021-11-25 19:06:09,121 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) [2021-11-25 19:06:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2772 transitions. [2021-11-25 19:06:09,138 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2772 transitions. Word has length 125 [2021-11-25 19:06:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:09,138 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 2772 transitions. [2021-11-25 19:06:09,139 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) [2021-11-25 19:06:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2772 transitions. [2021-11-25 19:06:09,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-25 19:06:09,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:09,148 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] [2021-11-25 19:06:09,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:09,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:09,365 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:09,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1346410445, now seen corresponding path program 1 times [2021-11-25 19:06:09,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:09,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389289849] [2021-11-25 19:06:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:09,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-25 19:06:09,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:09,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389289849] [2021-11-25 19:06:09,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389289849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:09,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166329753] [2021-11-25 19:06:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:09,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:09,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:09,470 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:09,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:06:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:09,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:06:09,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-25 19:06:09,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:06:09,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166329753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:06:09,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:06:09,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2021-11-25 19:06:09,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93266093] [2021-11-25 19:06:09,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:06:09,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:06:09,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:06:09,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:06:09,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:06:09,981 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) [2021-11-25 19:06:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:06:10,700 INFO L93 Difference]: Finished difference Result 3327 states and 5238 transitions. [2021-11-25 19:06:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:06:10,701 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 [2021-11-25 19:06:10,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:06:10,715 INFO L225 Difference]: With dead ends: 3327 [2021-11-25 19:06:10,715 INFO L226 Difference]: Without dead ends: 1579 [2021-11-25 19:06:10,726 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 [2021-11-25 19:06:10,729 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, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:06:10,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 1986 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 19:06:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-11-25 19:06:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1555. [2021-11-25 19:06:10,812 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) [2021-11-25 19:06:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2446 transitions. [2021-11-25 19:06:10,822 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2446 transitions. Word has length 130 [2021-11-25 19:06:10,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:06:10,822 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 2446 transitions. [2021-11-25 19:06:10,823 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) [2021-11-25 19:06:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2446 transitions. [2021-11-25 19:06:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-25 19:06:10,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:06:10,834 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-11-25 19:06:10,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:06:11,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:11,060 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:06:11,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:06:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash -386033699, now seen corresponding path program 1 times [2021-11-25 19:06:11,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:06:11,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421515390] [2021-11-25 19:06:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:11,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:06:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-25 19:06:11,268 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:06:11,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421515390] [2021-11-25 19:06:11,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421515390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:06:11,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696887025] [2021-11-25 19:06:11,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:06:11,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:06:11,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:06:11,270 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:06:11,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:06:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:06:11,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:06:11,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:06:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-25 19:06:11,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:06:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-11-25 19:06:12,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696887025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:06:12,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [65625419] [2021-11-25 19:06:12,412 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2021-11-25 19:06:12,412 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:06:12,413 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:06:12,413 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:06:12,413 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:06:17,022 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2021-11-25 19:06:26,498 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-25 19:06:26,592 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 50 for LOIs [2021-11-25 19:06:26,714 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 83 for LOIs [2021-11-25 19:06:27,058 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 23 for LOIs [2021-11-25 19:06:27,118 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2021-11-25 19:06:27,128 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 90 for LOIs [2021-11-25 19:06:27,144 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-25 19:06:27,149 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 19:06:30,287 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2021-11-25 19:06:30,780 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-25 19:06:30,828 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-25 19:06:30,832 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-25 19:06:30,973 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:06:47,376 WARN L227 SmtUtils]: Spent 5.32s 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) [2021-11-25 19:06:52,962 WARN L227 SmtUtils]: Spent 5.33s 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) [2021-11-25 19:07:33,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '41379#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1| 0)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#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|) (<= 0 (+ |timeShift_areDoorsOpen_#res#1| 2147483648)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (<= 0 ~head~0.offset) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483648)) (<= ~currentFloorID~0 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 4 ~executiveFloor~0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (<= 12 ~cleanupTimeShifts~0) (<= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= |timeShift_areDoorsOpen_#res#1| 2147483647) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (<= 0 ~head~0.base) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (<= |#NULL.base| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= ~maximumWeight~0 100) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483647) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#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|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|))' at error location [2021-11-25 19:07:33,990 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:07:33,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:07:33,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2021-11-25 19:07:33,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948612953] [2021-11-25 19:07:33,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:07:33,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 19:07:33,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:07:33,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 19:07:33,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1099, Invalid=12473, Unknown=0, NotChecked=0, Total=13572 [2021-11-25 19:07:33,996 INFO L87 Difference]: Start difference. First operand 1555 states and 2446 transitions. Second operand has 26 states, 20 states have (on average 10.15) internal successors, (203), 22 states have internal predecessors, (203), 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) [2021-11-25 19:07:46,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:07:46,638 INFO L93 Difference]: Finished difference Result 5716 states and 9215 transitions. [2021-11-25 19:07:46,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-25 19:07:46,639 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 10.15) internal successors, (203), 22 states have internal predecessors, (203), 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 188 [2021-11-25 19:07:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:07:46,672 INFO L225 Difference]: With dead ends: 5716 [2021-11-25 19:07:46,673 INFO L226 Difference]: Without dead ends: 4123 [2021-11-25 19:07:46,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 491 SyntacticMatches, 8 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12524 ImplicationChecksByTransitivity, 64.7s TimeCoverageRelationStatistics Valid=2314, Invalid=28838, Unknown=0, NotChecked=0, Total=31152 [2021-11-25 19:07:46,701 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 9970 mSDsluCounter, 4544 mSDsCounter, 0 mSdLazyCounter, 16180 mSolverCounterSat, 7576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9992 SdHoareTripleChecker+Valid, 5095 SdHoareTripleChecker+Invalid, 23756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7576 IncrementalHoareTripleChecker+Valid, 16180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2021-11-25 19:07:46,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9992 Valid, 5095 Invalid, 23756 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7576 Valid, 16180 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2021-11-25 19:07:46,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-11-25 19:07:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3779. [2021-11-25 19:07:47,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3779 states, 2781 states have (on average 1.5329018338727076) internal successors, (4263), 2861 states have internal predecessors, (4263), 704 states have call successors, (704), 302 states have call predecessors, (704), 293 states have return successors, (815), 675 states have call predecessors, (815), 696 states have call successors, (815) [2021-11-25 19:07:47,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 5782 transitions. [2021-11-25 19:07:47,063 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 5782 transitions. Word has length 188 [2021-11-25 19:07:47,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:07:47,064 INFO L470 AbstractCegarLoop]: Abstraction has 3779 states and 5782 transitions. [2021-11-25 19:07:47,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 10.15) internal successors, (203), 22 states have internal predecessors, (203), 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) [2021-11-25 19:07:47,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 5782 transitions. [2021-11-25 19:07:47,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-25 19:07:47,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:07:47,099 INFO L514 BasicCegarLoop]: trace histogram [14, 11, 11, 11, 11, 6, 6, 6, 5, 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, 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] [2021-11-25 19:07:47,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:07:47,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:07:47,317 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:07:47,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:07:47,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1062772359, now seen corresponding path program 1 times [2021-11-25 19:07:47,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:07:47,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715201174] [2021-11-25 19:07:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:47,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:07:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-11-25 19:07:47,526 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:07:47,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715201174] [2021-11-25 19:07:47,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715201174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:07:47,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435684566] [2021-11-25 19:07:47,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:07:47,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:07:47,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:07:47,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:07:47,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:07:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:07:47,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:07:47,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:07:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 118 proven. 38 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2021-11-25 19:07:48,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:07:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 36 proven. 23 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2021-11-25 19:07:49,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435684566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:07:49,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75653966] [2021-11-25 19:07:49,257 INFO L159 IcfgInterpreter]: Started Sifa with 129 locations of interest [2021-11-25 19:07:49,258 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:07:49,259 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:07:49,259 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:07:49,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:07:56,105 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 555 for LOIs [2021-11-25 19:07:56,547 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 21 for LOIs [2021-11-25 19:08:00,469 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 46 for LOIs [2021-11-25 19:08:00,638 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 42 for LOIs [2021-11-25 19:08:00,705 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 80 for LOIs [2021-11-25 19:08:01,039 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 50 for LOIs [2021-11-25 19:08:01,211 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2021-11-25 19:08:01,222 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 82 for LOIs [2021-11-25 19:08:01,242 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2021-11-25 19:08:01,250 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 19:08:04,490 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 34 for LOIs [2021-11-25 19:08:04,555 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 32 for LOIs [2021-11-25 19:08:04,558 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 508 for LOIs [2021-11-25 19:08:06,673 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 778 for LOIs [2021-11-25 19:08:10,446 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 631 for LOIs [2021-11-25 19:08:10,809 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:08:24,552 WARN L227 SmtUtils]: Spent 7.23s 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) [2021-11-25 19:08:32,951 WARN L227 SmtUtils]: Spent 7.62s 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) [2021-11-25 19:08:38,573 WARN L227 SmtUtils]: Spent 5.34s 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) [2021-11-25 19:08:44,196 WARN L227 SmtUtils]: Spent 5.33s 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) [2021-11-25 19:08:51,840 WARN L227 SmtUtils]: Spent 6.53s 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) [2021-11-25 19:08:57,980 WARN L227 SmtUtils]: Spent 5.21s 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) [2021-11-25 19:09:56,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56497#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1| 0)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (= ~executiveFloor~0 4) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_areDoorsOpen_#res#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483648)) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|)) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (= ~head~0.offset 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 |timeShift_~tmp___9~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= |timeShift_areDoorsOpen_#res#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483647) (= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (= |#NULL.offset| 0) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#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 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| |timeShift_areDoorsOpen_#res#1|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2021-11-25 19:09:56,048 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:09:56,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:09:56,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2021-11-25 19:09:56,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198080258] [2021-11-25 19:09:56,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:09:56,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 19:09:56,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:09:56,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 19:09:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1032, Invalid=13248, Unknown=0, NotChecked=0, Total=14280 [2021-11-25 19:09:56,053 INFO L87 Difference]: Start difference. First operand 3779 states and 5782 transitions. Second operand has 21 states, 17 states have (on average 12.823529411764707) internal successors, (218), 18 states have internal predecessors, (218), 8 states have call successors, (80), 5 states have call predecessors, (80), 8 states have return successors, (76), 9 states have call predecessors, (76), 8 states have call successors, (76) [2021-11-25 19:10:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:00,990 INFO L93 Difference]: Finished difference Result 8119 states and 12519 transitions. [2021-11-25 19:10:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-25 19:10:00,991 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 12.823529411764707) internal successors, (218), 18 states have internal predecessors, (218), 8 states have call successors, (80), 5 states have call predecessors, (80), 8 states have return successors, (76), 9 states have call predecessors, (76), 8 states have call successors, (76) Word has length 319 [2021-11-25 19:10:00,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:01,026 INFO L225 Difference]: With dead ends: 8119 [2021-11-25 19:10:01,027 INFO L226 Difference]: Without dead ends: 4615 [2021-11-25 19:10:01,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1013 GetRequests, 821 SyntacticMatches, 40 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9665 ImplicationChecksByTransitivity, 107.0s TimeCoverageRelationStatistics Valid=1457, Invalid=22105, Unknown=0, NotChecked=0, Total=23562 [2021-11-25 19:10:01,055 INFO L933 BasicCegarLoop]: 931 mSDtfsCounter, 2445 mSDsluCounter, 8792 mSDsCounter, 0 mSdLazyCounter, 5079 mSolverCounterSat, 1594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2460 SdHoareTripleChecker+Valid, 9013 SdHoareTripleChecker+Invalid, 6673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1594 IncrementalHoareTripleChecker+Valid, 5079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:01,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2460 Valid, 9013 Invalid, 6673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1594 Valid, 5079 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-25 19:10:01,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4615 states. [2021-11-25 19:10:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4615 to 4469. [2021-11-25 19:10:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4469 states, 3264 states have (on average 1.4785539215686274) internal successors, (4826), 3361 states have internal predecessors, (4826), 814 states have call successors, (814), 368 states have call predecessors, (814), 390 states have return successors, (1057), 799 states have call predecessors, (1057), 804 states have call successors, (1057) [2021-11-25 19:10:01,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 6697 transitions. [2021-11-25 19:10:01,385 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 6697 transitions. Word has length 319 [2021-11-25 19:10:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:01,386 INFO L470 AbstractCegarLoop]: Abstraction has 4469 states and 6697 transitions. [2021-11-25 19:10:01,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 12.823529411764707) internal successors, (218), 18 states have internal predecessors, (218), 8 states have call successors, (80), 5 states have call predecessors, (80), 8 states have return successors, (76), 9 states have call predecessors, (76), 8 states have call successors, (76) [2021-11-25 19:10:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 6697 transitions. [2021-11-25 19:10:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2021-11-25 19:10:01,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:01,429 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:01,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:10:01,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:01,656 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:01,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:01,657 INFO L85 PathProgramCache]: Analyzing trace with hash 51242830, now seen corresponding path program 1 times [2021-11-25 19:10:01,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:01,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29709083] [2021-11-25 19:10:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:01,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:01,907 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 34 proven. 52 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-11-25 19:10:01,908 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:01,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29709083] [2021-11-25 19:10:01,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29709083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:10:01,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750369051] [2021-11-25 19:10:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:01,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:01,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:01,912 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:01,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:10:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:02,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:10:02,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-25 19:10:02,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:10:02,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750369051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:02,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:10:02,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-25 19:10:02,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180183666] [2021-11-25 19:10:02,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:02,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:10:02,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:02,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:10:02,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:10:02,796 INFO L87 Difference]: Start difference. First operand 4469 states and 6697 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-25 19:10:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:03,110 INFO L93 Difference]: Finished difference Result 7865 states and 11806 transitions. [2021-11-25 19:10:03,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:10:03,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 351 [2021-11-25 19:10:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:03,144 INFO L225 Difference]: With dead ends: 7865 [2021-11-25 19:10:03,145 INFO L226 Difference]: Without dead ends: 4571 [2021-11-25 19:10:03,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:10:03,160 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 357 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:03,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 1005 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:10:03,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2021-11-25 19:10:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4549. [2021-11-25 19:10:03,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4549 states, 3316 states have (on average 1.4577804583835947) internal successors, (4834), 3415 states have internal predecessors, (4834), 828 states have call successors, (828), 380 states have call predecessors, (828), 404 states have return successors, (1071), 813 states have call predecessors, (1071), 818 states have call successors, (1071) [2021-11-25 19:10:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4549 states to 4549 states and 6733 transitions. [2021-11-25 19:10:03,563 INFO L78 Accepts]: Start accepts. Automaton has 4549 states and 6733 transitions. Word has length 351 [2021-11-25 19:10:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:03,566 INFO L470 AbstractCegarLoop]: Abstraction has 4549 states and 6733 transitions. [2021-11-25 19:10:03,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-25 19:10:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 4549 states and 6733 transitions. [2021-11-25 19:10:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-25 19:10:03,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:03,604 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:03,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:10:03,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:03,825 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:03,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2035398744, now seen corresponding path program 1 times [2021-11-25 19:10:03,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:03,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804384275] [2021-11-25 19:10:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:03,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 34 proven. 52 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-11-25 19:10:04,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:04,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804384275] [2021-11-25 19:10:04,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804384275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:10:04,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380859560] [2021-11-25 19:10:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:04,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:04,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:04,090 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:04,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:10:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:04,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 3081 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:10:04,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2021-11-25 19:10:05,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:10:05,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380859560] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:05,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:10:05,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-25 19:10:05,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483197504] [2021-11-25 19:10:05,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:05,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:10:05,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:05,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:10:05,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:10:05,067 INFO L87 Difference]: Start difference. First operand 4549 states and 6733 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-25 19:10:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:05,428 INFO L93 Difference]: Finished difference Result 7556 states and 11220 transitions. [2021-11-25 19:10:05,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:10:05,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 359 [2021-11-25 19:10:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:05,458 INFO L225 Difference]: With dead ends: 7556 [2021-11-25 19:10:05,458 INFO L226 Difference]: Without dead ends: 4641 [2021-11-25 19:10:05,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:10:05,471 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 401 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:05,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 989 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:10:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-11-25 19:10:05,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 4619. [2021-11-25 19:10:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4619 states, 3360 states have (on average 1.4482142857142857) internal successors, (4866), 3463 states have internal predecessors, (4866), 840 states have call successors, (840), 392 states have call predecessors, (840), 418 states have return successors, (1073), 823 states have call predecessors, (1073), 830 states have call successors, (1073) [2021-11-25 19:10:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4619 states to 4619 states and 6779 transitions. [2021-11-25 19:10:05,766 INFO L78 Accepts]: Start accepts. Automaton has 4619 states and 6779 transitions. Word has length 359 [2021-11-25 19:10:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:05,766 INFO L470 AbstractCegarLoop]: Abstraction has 4619 states and 6779 transitions. [2021-11-25 19:10:05,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2021-11-25 19:10:05,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4619 states and 6779 transitions. [2021-11-25 19:10:05,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-11-25 19:10:05,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:05,802 INFO L514 BasicCegarLoop]: trace histogram [15, 12, 12, 12, 12, 6, 6, 6, 6, 5, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:05,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:10:06,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:10:06,020 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:06,021 INFO L85 PathProgramCache]: Analyzing trace with hash -958661354, now seen corresponding path program 1 times [2021-11-25 19:10:06,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:06,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812410752] [2021-11-25 19:10:06,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:06,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 37 proven. 50 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2021-11-25 19:10:06,244 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812410752] [2021-11-25 19:10:06,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812410752] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:10:06,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187055339] [2021-11-25 19:10:06,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:06,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:06,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:06,246 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:06,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:10:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:06,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 3070 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:10:06,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 472 trivial. 0 not checked. [2021-11-25 19:10:07,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:10:07,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187055339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:10:07,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:10:07,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-25 19:10:07,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63465941] [2021-11-25 19:10:07,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:10:07,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:10:07,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:10:07,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:10:07,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:10:07,133 INFO L87 Difference]: Start difference. First operand 4619 states and 6779 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-25 19:10:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:10:07,478 INFO L93 Difference]: Finished difference Result 9707 states and 14557 transitions. [2021-11-25 19:10:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:10:07,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 353 [2021-11-25 19:10:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:10:07,509 INFO L225 Difference]: With dead ends: 9707 [2021-11-25 19:10:07,510 INFO L226 Difference]: Without dead ends: 5319 [2021-11-25 19:10:07,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:10:07,530 INFO L933 BasicCegarLoop]: 547 mSDtfsCounter, 69 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:10:07,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1044 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:10:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5319 states. [2021-11-25 19:10:07,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5319 to 5067. [2021-11-25 19:10:07,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 3748 states have (on average 1.4477054429028815) internal successors, (5426), 3851 states have internal predecessors, (5426), 900 states have call successors, (900), 392 states have call predecessors, (900), 418 states have return successors, (1133), 883 states have call predecessors, (1133), 890 states have call successors, (1133) [2021-11-25 19:10:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 7459 transitions. [2021-11-25 19:10:07,853 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 7459 transitions. Word has length 353 [2021-11-25 19:10:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:10:07,854 INFO L470 AbstractCegarLoop]: Abstraction has 5067 states and 7459 transitions. [2021-11-25 19:10:07,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-25 19:10:07,855 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 7459 transitions. [2021-11-25 19:10:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-11-25 19:10:07,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:10:07,943 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:10:07,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:10:08,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:08,156 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:10:08,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:10:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash 332450385, now seen corresponding path program 1 times [2021-11-25 19:10:08,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:10:08,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768029309] [2021-11-25 19:10:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:08,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:10:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-25 19:10:08,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:10:08,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768029309] [2021-11-25 19:10:08,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768029309] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:10:08,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154014643] [2021-11-25 19:10:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:10:08,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:10:08,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:10:08,334 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:10:08,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:10:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:10:08,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:10:08,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:10:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 101 proven. 18 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2021-11-25 19:10:09,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:10:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-25 19:10:09,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154014643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:10:09,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327403444] [2021-11-25 19:10:09,659 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2021-11-25 19:10:09,660 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:10:09,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:10:09,662 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:10:09,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:10:14,477 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2021-11-25 19:10:23,445 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-25 19:10:23,531 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 50 for LOIs [2021-11-25 19:10:23,618 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 83 for LOIs [2021-11-25 19:10:23,830 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2021-11-25 19:10:23,882 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2021-11-25 19:10:23,892 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 90 for LOIs [2021-11-25 19:10:23,908 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-25 19:10:23,911 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 19:10:27,092 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2021-11-25 19:10:27,598 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-25 19:10:27,664 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-25 19:10:27,669 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-25 19:10:27,804 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:10:44,899 WARN L227 SmtUtils]: Spent 5.57s 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) [2021-11-25 19:10:50,803 WARN L227 SmtUtils]: Spent 5.61s 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) [2021-11-25 19:11:08,684 WARN L227 SmtUtils]: Spent 5.10s 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) [2021-11-25 19:11:36,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '133780#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1| 0)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#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|) (<= 0 (+ |timeShift_areDoorsOpen_#res#1| 2147483648)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (<= 0 ~head~0.offset) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483648)) (<= ~currentFloorID~0 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 4 ~executiveFloor~0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (<= 12 ~cleanupTimeShifts~0) (<= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= |timeShift_areDoorsOpen_#res#1| 2147483647) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (<= 0 ~head~0.base) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (<= |#NULL.base| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= ~maximumWeight~0 100) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483647) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#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|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|))' at error location [2021-11-25 19:11:36,691 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:11:36,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:11:36,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-11-25 19:11:36,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971662745] [2021-11-25 19:11:36,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:11:36,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 19:11:36,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:11:36,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 19:11:36,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1105, Invalid=11777, Unknown=0, NotChecked=0, Total=12882 [2021-11-25 19:11:36,695 INFO L87 Difference]: Start difference. First operand 5067 states and 7459 transitions. Second operand has 25 states, 19 states have (on average 9.947368421052632) internal successors, (189), 22 states have internal predecessors, (189), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2021-11-25 19:11:41,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:41,535 INFO L93 Difference]: Finished difference Result 8794 states and 12959 transitions. [2021-11-25 19:11:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 19:11:41,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 9.947368421052632) internal successors, (189), 22 states have internal predecessors, (189), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) Word has length 249 [2021-11-25 19:11:41,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:41,607 INFO L225 Difference]: With dead ends: 8794 [2021-11-25 19:11:41,607 INFO L226 Difference]: Without dead ends: 5941 [2021-11-25 19:11:41,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 650 SyntacticMatches, 8 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6472 ImplicationChecksByTransitivity, 70.0s TimeCoverageRelationStatistics Valid=1440, Invalid=16650, Unknown=0, NotChecked=0, Total=18090 [2021-11-25 19:11:41,624 INFO L933 BasicCegarLoop]: 1001 mSDtfsCounter, 2873 mSDsluCounter, 7743 mSDsCounter, 0 mSdLazyCounter, 6100 mSolverCounterSat, 1830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2894 SdHoareTripleChecker+Valid, 8082 SdHoareTripleChecker+Invalid, 7930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1830 IncrementalHoareTripleChecker+Valid, 6100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:41,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2894 Valid, 8082 Invalid, 7930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1830 Valid, 6100 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 19:11:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5941 states. [2021-11-25 19:11:41,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5941 to 5807. [2021-11-25 19:11:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5807 states, 4306 states have (on average 1.4117510450534139) internal successors, (6079), 4418 states have internal predecessors, (6079), 1012 states have call successors, (1012), 452 states have call predecessors, (1012), 488 states have return successors, (1327), 996 states have call predecessors, (1327), 1002 states have call successors, (1327) [2021-11-25 19:11:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5807 states to 5807 states and 8418 transitions. [2021-11-25 19:11:42,018 INFO L78 Accepts]: Start accepts. Automaton has 5807 states and 8418 transitions. Word has length 249 [2021-11-25 19:11:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:42,019 INFO L470 AbstractCegarLoop]: Abstraction has 5807 states and 8418 transitions. [2021-11-25 19:11:42,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 9.947368421052632) internal successors, (189), 22 states have internal predecessors, (189), 11 states have call successors, (63), 6 states have call predecessors, (63), 9 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2021-11-25 19:11:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5807 states and 8418 transitions. [2021-11-25 19:11:42,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-11-25 19:11:42,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:42,049 INFO L514 BasicCegarLoop]: trace histogram [16, 12, 12, 12, 12, 6, 6, 6, 6, 6, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:42,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:42,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:11:42,263 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:11:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1066880331, now seen corresponding path program 1 times [2021-11-25 19:11:42,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:11:42,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670726109] [2021-11-25 19:11:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:42,264 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:11:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 37 proven. 50 refuted. 0 times theorem prover too weak. 712 trivial. 0 not checked. [2021-11-25 19:11:42,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:11:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670726109] [2021-11-25 19:11:42,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670726109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:11:42,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174457207] [2021-11-25 19:11:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:42,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:42,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:11:42,465 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:11:42,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:11:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:42,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 3091 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:11:42,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:43,391 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-11-25 19:11:43,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:11:43,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174457207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:11:43,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:11:43,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-11-25 19:11:43,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688583118] [2021-11-25 19:11:43,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:11:43,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:11:43,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:11:43,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:11:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:11:43,394 INFO L87 Difference]: Start difference. First operand 5807 states and 8418 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-25 19:11:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:11:43,724 INFO L93 Difference]: Finished difference Result 12535 states and 18610 transitions. [2021-11-25 19:11:43,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:11:43,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 365 [2021-11-25 19:11:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:11:43,760 INFO L225 Difference]: With dead ends: 12535 [2021-11-25 19:11:43,760 INFO L226 Difference]: Without dead ends: 6959 [2021-11-25 19:11:43,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:11:43,789 INFO L933 BasicCegarLoop]: 525 mSDtfsCounter, 59 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:11:43,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1017 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:11:43,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6959 states. [2021-11-25 19:11:44,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6959 to 6697. [2021-11-25 19:11:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6697 states, 5196 states have (on average 1.4039645881447267) internal successors, (7295), 5308 states have internal predecessors, (7295), 1012 states have call successors, (1012), 452 states have call predecessors, (1012), 488 states have return successors, (1327), 996 states have call predecessors, (1327), 1002 states have call successors, (1327) [2021-11-25 19:11:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6697 states to 6697 states and 9634 transitions. [2021-11-25 19:11:44,221 INFO L78 Accepts]: Start accepts. Automaton has 6697 states and 9634 transitions. Word has length 365 [2021-11-25 19:11:44,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:11:44,221 INFO L470 AbstractCegarLoop]: Abstraction has 6697 states and 9634 transitions. [2021-11-25 19:11:44,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 2 states have call successors, (41), 2 states have call predecessors, (41), 2 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-25 19:11:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 6697 states and 9634 transitions. [2021-11-25 19:11:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-25 19:11:44,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:11:44,254 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:11:44,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:11:44,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 19:11:44,468 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:11:44,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:11:44,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1591199777, now seen corresponding path program 1 times [2021-11-25 19:11:44,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:11:44,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966407549] [2021-11-25 19:11:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:44,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:11:44,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-25 19:11:44,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:11:44,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966407549] [2021-11-25 19:11:44,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966407549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:11:44,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922311776] [2021-11-25 19:11:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:11:44,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:11:44,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:11:44,637 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:11:44,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:11:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:11:45,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:11:45,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:11:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 105 proven. 18 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-11-25 19:11:45,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:11:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2021-11-25 19:11:46,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922311776] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:11:46,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1877360019] [2021-11-25 19:11:46,144 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2021-11-25 19:11:46,144 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:11:46,145 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:11:46,145 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:11:46,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:11:50,970 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2021-11-25 19:11:57,911 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-25 19:11:57,998 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 50 for LOIs [2021-11-25 19:11:58,087 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 88 for LOIs [2021-11-25 19:11:58,351 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2021-11-25 19:11:58,404 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2021-11-25 19:11:58,415 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 73 for LOIs [2021-11-25 19:11:58,431 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-25 19:11:58,434 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 19:12:01,669 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2021-11-25 19:12:02,183 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-25 19:12:02,255 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-25 19:12:02,259 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-25 19:12:02,396 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:12:19,344 WARN L227 SmtUtils]: Spent 5.47s 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) [2021-11-25 19:12:25,127 WARN L227 SmtUtils]: Spent 5.52s 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) [2021-11-25 19:12:42,719 WARN L227 SmtUtils]: Spent 5.09s 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) [2021-11-25 19:13:05,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '184404#(and (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#1| 0)) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 0)) (<= ~cleanupTimeShifts~0 12) (<= ~head~0.offset 0) (<= 0 |#NULL.base|) (= |timeShift_isExecutiveFloor_~retValue_acc~16#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ |timeShift_areDoorsOpen_#res#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1| 2147483647) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| 0) (<= 0 ~head~0.offset) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483648)) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|)) (<= 4 ~executiveFloor~0) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1|)) (<= 12 ~cleanupTimeShifts~0) (<= |#NULL.offset| 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~12#1| 1) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483647) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|) (<= |timeShift_areDoorsOpen_#res#1| 2147483647) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~4#1| 2147483648)) (<= 0 ~head~0.base) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~10#1| |timeShift_isExecutiveFloor_#res#1|) (<= |#NULL.base| 0) (= |timeShift_areDoorsOpen_~retValue_acc~2#1| ~doorState~0) (<= ~maximumWeight~0 100) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~8#1| 2147483647) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~5#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~7#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|) (= |timeShift_isExecutiveFloor_#in~floorID#1| |timeShift___utac_acc__Specification14_spec__1_~tmp~14#1|))' at error location [2021-11-25 19:13:05,953 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:13:05,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:13:05,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-11-25 19:13:05,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685869300] [2021-11-25 19:13:05,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:13:05,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 19:13:05,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:13:05,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 19:13:05,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=843, Invalid=11147, Unknown=0, NotChecked=0, Total=11990 [2021-11-25 19:13:05,957 INFO L87 Difference]: Start difference. First operand 6697 states and 9634 transitions. Second operand has 22 states, 17 states have (on average 10.0) internal successors, (170), 19 states have internal predecessors, (170), 8 states have call successors, (61), 5 states have call predecessors, (61), 9 states have return successors, (60), 9 states have call predecessors, (60), 8 states have call successors, (60) [2021-11-25 19:13:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:13:09,046 INFO L93 Difference]: Finished difference Result 9899 states and 14204 transitions. [2021-11-25 19:13:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 19:13:09,046 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 10.0) internal successors, (170), 19 states have internal predecessors, (170), 8 states have call successors, (61), 5 states have call predecessors, (61), 9 states have return successors, (60), 9 states have call predecessors, (60), 8 states have call successors, (60) Word has length 251 [2021-11-25 19:13:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:13:09,078 INFO L225 Difference]: With dead ends: 9899 [2021-11-25 19:13:09,079 INFO L226 Difference]: Without dead ends: 6810 [2021-11-25 19:13:09,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 659 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5025 ImplicationChecksByTransitivity, 64.3s TimeCoverageRelationStatistics Valid=1034, Invalid=14218, Unknown=0, NotChecked=0, Total=15252 [2021-11-25 19:13:09,095 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 2256 mSDsluCounter, 5358 mSDsCounter, 0 mSdLazyCounter, 3953 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2275 SdHoareTripleChecker+Valid, 5762 SdHoareTripleChecker+Invalid, 5105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 3953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:13:09,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2275 Valid, 5762 Invalid, 5105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1152 Valid, 3953 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 19:13:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6810 states. [2021-11-25 19:13:09,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6810 to 6667. [2021-11-25 19:13:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6667 states, 5166 states have (on average 1.3995354239256679) internal successors, (7230), 5278 states have internal predecessors, (7230), 1012 states have call successors, (1012), 452 states have call predecessors, (1012), 488 states have return successors, (1327), 996 states have call predecessors, (1327), 1002 states have call successors, (1327) [2021-11-25 19:13:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6667 states to 6667 states and 9569 transitions. [2021-11-25 19:13:09,511 INFO L78 Accepts]: Start accepts. Automaton has 6667 states and 9569 transitions. Word has length 251 [2021-11-25 19:13:09,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:13:09,512 INFO L470 AbstractCegarLoop]: Abstraction has 6667 states and 9569 transitions. [2021-11-25 19:13:09,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 10.0) internal successors, (170), 19 states have internal predecessors, (170), 8 states have call successors, (61), 5 states have call predecessors, (61), 9 states have return successors, (60), 9 states have call predecessors, (60), 8 states have call successors, (60) [2021-11-25 19:13:09,513 INFO L276 IsEmpty]: Start isEmpty. Operand 6667 states and 9569 transitions. [2021-11-25 19:13:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-25 19:13:09,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:13:09,544 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:13:09,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:13:09,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 19:13:09,760 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:13:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:13:09,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1404373967, now seen corresponding path program 1 times [2021-11-25 19:13:09,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:13:09,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594613664] [2021-11-25 19:13:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:09,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:13:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 37 proven. 33 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-25 19:13:09,927 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:13:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594613664] [2021-11-25 19:13:09,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594613664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:13:09,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744673516] [2021-11-25 19:13:09,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:13:09,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:13:09,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:13:09,932 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:13:09,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_546a87bd-db11-4362-95ca-3759c0209e51/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 19:13:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:13:10,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:13:10,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:13:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 145 proven. 18 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-11-25 19:13:10,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:13:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 37 proven. 33 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-11-25 19:13:11,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744673516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:13:11,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1724559419] [2021-11-25 19:13:11,243 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2021-11-25 19:13:11,243 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:13:11,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:13:11,244 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:13:11,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:13:16,023 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 659 for LOIs [2021-11-25 19:13:22,834 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2021-11-25 19:13:22,934 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 50 for LOIs [2021-11-25 19:13:23,023 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 88 for LOIs [2021-11-25 19:13:23,282 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__weight with input of size 28 for LOIs [2021-11-25 19:13:23,335 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2021-11-25 19:13:23,345 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 73 for LOIs [2021-11-25 19:13:23,361 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 28 for LOIs [2021-11-25 19:13:23,365 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 573 for LOIs [2021-11-25 19:13:26,561 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 577 for LOIs [2021-11-25 19:13:27,071 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 62 for LOIs [2021-11-25 19:13:27,136 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 44 for LOIs [2021-11-25 19:13:27,140 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 505 for LOIs [2021-11-25 19:13:27,277 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:13:43,984 WARN L227 SmtUtils]: Spent 5.47s 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) [2021-11-25 19:13:49,723 WARN L227 SmtUtils]: Spent 5.51s 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) [2021-11-25 19:14:06,903 WARN L227 SmtUtils]: Spent 5.09s 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)