./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur --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 a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:52:48,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:52:48,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:52:48,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:52:48,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:52:48,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:52:48,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:52:48,184 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:52:48,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:52:48,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:52:48,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:52:48,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:52:48,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:52:48,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:52:48,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:52:48,212 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:52:48,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:52:48,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:52:48,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:52:48,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:52:48,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:52:48,234 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:52:48,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:52:48,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:52:48,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:52:48,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:52:48,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:52:48,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:52:48,251 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:52:48,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:52:48,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:52:48,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:52:48,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:52:48,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:52:48,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:52:48,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:52:48,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:52:48,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:52:48,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:52:48,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:52:48,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:52:48,271 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:52:48,313 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:52:48,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:52:48,322 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:52:48,322 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:52:48,323 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:52:48,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:52:48,324 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:52:48,324 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:52:48,325 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:52:48,325 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:52:48,326 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:52:48,326 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:52:48,327 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:52:48,327 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:52:48,327 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:52:48,328 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:52:48,328 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:52:48,328 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:52:48,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:52:48,329 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:52:48,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:52:48,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:52:48,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:52:48,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:52:48,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:52:48,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:52:48,331 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:52:48,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:52:48,332 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:52:48,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:52:48,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:52:48,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:52:48,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:52:48,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:52:48,333 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:52:48,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:52:48,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:52:48,334 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:52:48,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:52:48,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:52:48,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:52:48,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3102ca0659fbbd15269b525dd7b096164ab7cd0af67dfa99033803ea46b0a8e [2022-11-26 00:52:48,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:52:48,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:52:48,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:52:48,775 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:52:48,775 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:52:48,777 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2022-11-26 00:52:51,984 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:52:52,352 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:52:52,353 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c [2022-11-26 00:52:52,380 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/data/5e490c81a/b51b2a017f2c43609d7fecab2786b27b/FLAG18c8d303c [2022-11-26 00:52:52,396 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/data/5e490c81a/b51b2a017f2c43609d7fecab2786b27b [2022-11-26 00:52:52,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:52:52,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:52:52,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:52:52,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:52:52,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:52:52,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:52:52" (1/1) ... [2022-11-26 00:52:52,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aeb5853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:52, skipping insertion in model container [2022-11-26 00:52:52,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:52:52" (1/1) ... [2022-11-26 00:52:52,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:52:52,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:52:52,718 WARN L237 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_4a2c4caa-79f8-418f-a823-97b63059efb6/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2022-11-26 00:52:53,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:52:53,097 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:52:53,117 WARN L237 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_4a2c4caa-79f8-418f-a823-97b63059efb6/sv-benchmarks/c/product-lines/elevator_spec14_product11.cil.c[3700,3713] [2022-11-26 00:52:53,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:52:53,245 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:52:53,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53 WrapperNode [2022-11-26 00:52:53,245 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:52:53,247 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:52:53,247 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:52:53,247 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:52:53,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53" (1/1) ... [2022-11-26 00:52:53,286 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53" (1/1) ... [2022-11-26 00:52:53,340 INFO L138 Inliner]: procedures = 90, calls = 331, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 1061 [2022-11-26 00:52:53,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:52:53,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:52:53,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:52:53,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:52:53,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53" (1/1) ... [2022-11-26 00:52:53,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53" (1/1) ... [2022-11-26 00:52:53,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53" (1/1) ... [2022-11-26 00:52:53,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53" (1/1) ... [2022-11-26 00:52:53,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53" (1/1) ... [2022-11-26 00:52:53,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53" (1/1) ... [2022-11-26 00:52:53,398 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53" (1/1) ... [2022-11-26 00:52:53,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53" (1/1) ... [2022-11-26 00:52:53,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:52:53,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:52:53,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:52:53,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:52:53,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53" (1/1) ... [2022-11-26 00:52:53,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:52:53,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:52:53,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:52:53,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:52:53,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:52:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-26 00:52:53,523 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-26 00:52:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-26 00:52:53,523 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-26 00:52:53,523 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-26 00:52:53,524 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-26 00:52:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-26 00:52:53,524 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-26 00:52:53,524 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-11-26 00:52:53,525 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-11-26 00:52:53,525 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-26 00:52:53,525 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-26 00:52:53,525 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-26 00:52:53,525 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-26 00:52:53,526 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-26 00:52:53,526 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-26 00:52:53,526 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-26 00:52:53,526 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-26 00:52:53,526 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-26 00:52:53,527 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-26 00:52:53,527 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-26 00:52:53,528 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-26 00:52:53,528 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-26 00:52:53,528 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-26 00:52:53,529 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-26 00:52:53,530 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-26 00:52:53,530 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-26 00:52:53,530 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-26 00:52:53,530 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-26 00:52:53,532 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-26 00:52:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-26 00:52:53,532 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-26 00:52:53,533 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-26 00:52:53,533 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-26 00:52:53,533 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-26 00:52:53,534 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-26 00:52:53,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:52:53,534 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-26 00:52:53,534 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-26 00:52:53,534 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-26 00:52:53,535 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-26 00:52:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-26 00:52:53,535 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-26 00:52:53,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:52:53,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:52:53,537 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-26 00:52:53,537 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-26 00:52:53,803 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:52:53,806 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:52:55,296 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:52:56,198 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:52:56,198 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-26 00:52:56,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:52:56 BoogieIcfgContainer [2022-11-26 00:52:56,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:52:56,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:52:56,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:52:56,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:52:56,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:52:52" (1/3) ... [2022-11-26 00:52:56,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff8ab07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:52:56, skipping insertion in model container [2022-11-26 00:52:56,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:52:53" (2/3) ... [2022-11-26 00:52:56,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ff8ab07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:52:56, skipping insertion in model container [2022-11-26 00:52:56,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:52:56" (3/3) ... [2022-11-26 00:52:56,224 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product11.cil.c [2022-11-26 00:52:56,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:52:56,247 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-26 00:52:56,313 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:52:56,321 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3647f65c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:52:56,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-26 00:52:56,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-26 00:52:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:52:56,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:56,352 INFO L195 NwaCegarLoop]: 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] [2022-11-26 00:52:56,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:52:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:56,359 INFO L85 PathProgramCache]: Analyzing trace with hash -484411217, now seen corresponding path program 1 times [2022-11-26 00:52:56,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:56,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241726142] [2022-11-26 00:52:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:56,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:52:57,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:57,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241726142] [2022-11-26 00:52:57,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241726142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:52:57,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:52:57,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:52:57,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212233675] [2022-11-26 00:52:57,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:52:57,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:52:57,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:57,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:52:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:52:57,332 INFO L87 Difference]: Start difference. First operand has 347 states, 232 states have (on average 1.5775862068965518) internal successors, (366), 248 states have internal predecessors, (366), 91 states have call successors, (91), 22 states have call predecessors, (91), 22 states have return successors, (91), 89 states have call predecessors, (91), 91 states have call successors, (91) 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) [2022-11-26 00:52:58,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:58,330 INFO L93 Difference]: Finished difference Result 1019 states and 1636 transitions. [2022-11-26 00:52:58,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:52:58,333 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 [2022-11-26 00:52:58,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:58,359 INFO L225 Difference]: With dead ends: 1019 [2022-11-26 00:52:58,359 INFO L226 Difference]: Without dead ends: 673 [2022-11-26 00:52:58,369 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:52:58,373 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 523 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:58,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 2288 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:52:58,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-11-26 00:52:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 667. [2022-11-26 00:52:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 449 states have (on average 1.5679287305122493) internal successors, (704), 478 states have internal predecessors, (704), 176 states have call successors, (176), 43 states have call predecessors, (176), 41 states have return successors, (182), 170 states have call predecessors, (182), 174 states have call successors, (182) [2022-11-26 00:52:58,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1062 transitions. [2022-11-26 00:52:58,563 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1062 transitions. Word has length 73 [2022-11-26 00:52:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:58,565 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 1062 transitions. [2022-11-26 00:52:58,565 INFO L496 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) [2022-11-26 00:52:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1062 transitions. [2022-11-26 00:52:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-26 00:52:58,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:52:58,580 INFO L195 NwaCegarLoop]: 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] [2022-11-26 00:52:58,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:52:58,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:52:58,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:52:58,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1001026953, now seen corresponding path program 1 times [2022-11-26 00:52:58,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:52:58,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788247955] [2022-11-26 00:52:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:52:58,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:52:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:52:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:52:59,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:52:59,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788247955] [2022-11-26 00:52:59,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788247955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:52:59,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:52:59,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:52:59,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083169569] [2022-11-26 00:52:59,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:52:59,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:52:59,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:52:59,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:52:59,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:52:59,073 INFO L87 Difference]: Start difference. First operand 667 states and 1062 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) [2022-11-26 00:52:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:52:59,912 INFO L93 Difference]: Finished difference Result 764 states and 1209 transitions. [2022-11-26 00:52:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:52:59,913 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 [2022-11-26 00:52:59,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:52:59,922 INFO L225 Difference]: With dead ends: 764 [2022-11-26 00:52:59,922 INFO L226 Difference]: Without dead ends: 762 [2022-11-26 00:52:59,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:52:59,929 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 630 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:52:59,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 1618 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:52:59,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-11-26 00:52:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 752. [2022-11-26 00:52:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 500 states have (on average 1.534) internal successors, (767), 529 states have internal predecessors, (767), 198 states have call successors, (198), 56 states have call predecessors, (198), 53 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-26 00:52:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1175 transitions. [2022-11-26 00:52:59,995 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1175 transitions. Word has length 77 [2022-11-26 00:52:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:52:59,998 INFO L495 AbstractCegarLoop]: Abstraction has 752 states and 1175 transitions. [2022-11-26 00:52:59,998 INFO L496 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) [2022-11-26 00:52:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1175 transitions. [2022-11-26 00:53:00,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-26 00:53:00,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:00,006 INFO L195 NwaCegarLoop]: 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] [2022-11-26 00:53:00,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:53:00,006 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:53:00,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:00,007 INFO L85 PathProgramCache]: Analyzing trace with hash 756903943, now seen corresponding path program 1 times [2022-11-26 00:53:00,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:00,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495377499] [2022-11-26 00:53:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:00,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-26 00:53:00,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:00,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495377499] [2022-11-26 00:53:00,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495377499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:00,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:00,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:53:00,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347407273] [2022-11-26 00:53:00,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:00,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:53:00,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:53:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:53:00,260 INFO L87 Difference]: Start difference. First operand 752 states and 1175 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) [2022-11-26 00:53:00,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:00,472 INFO L93 Difference]: Finished difference Result 1530 states and 2419 transitions. [2022-11-26 00:53:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:53:00,472 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 [2022-11-26 00:53:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:00,478 INFO L225 Difference]: With dead ends: 1530 [2022-11-26 00:53:00,479 INFO L226 Difference]: Without dead ends: 790 [2022-11-26 00:53:00,487 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:53:00,492 INFO L413 NwaCegarLoop]: 521 mSDtfsCounter, 54 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:00,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1522 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:53:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-26 00:53:00,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 756. [2022-11-26 00:53:00,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 504 states have (on average 1.5297619047619047) internal successors, (771), 533 states have internal predecessors, (771), 198 states have call successors, (198), 56 states have call predecessors, (198), 53 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-26 00:53:00,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1179 transitions. [2022-11-26 00:53:00,564 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1179 transitions. Word has length 108 [2022-11-26 00:53:00,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:00,565 INFO L495 AbstractCegarLoop]: Abstraction has 756 states and 1179 transitions. [2022-11-26 00:53:00,565 INFO L496 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) [2022-11-26 00:53:00,565 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1179 transitions. [2022-11-26 00:53:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-26 00:53:00,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:00,573 INFO L195 NwaCegarLoop]: 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] [2022-11-26 00:53:00,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:53:00,574 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:53:00,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:00,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2136138177, now seen corresponding path program 1 times [2022-11-26 00:53:00,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:00,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404134253] [2022-11-26 00:53:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:00,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-26 00:53:00,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:00,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404134253] [2022-11-26 00:53:00,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404134253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:00,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174292263] [2022-11-26 00:53:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:00,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:00,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:00,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:00,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:53:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1274 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:53:01,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:53:01,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:53:01,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174292263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:01,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:53:01,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-26 00:53:01,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201586779] [2022-11-26 00:53:01,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:01,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:53:01,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:01,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:53:01,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:53:01,358 INFO L87 Difference]: Start difference. First operand 756 states and 1179 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) [2022-11-26 00:53:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:01,693 INFO L93 Difference]: Finished difference Result 1578 states and 2508 transitions. [2022-11-26 00:53:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:53:01,693 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 [2022-11-26 00:53:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:01,699 INFO L225 Difference]: With dead ends: 1578 [2022-11-26 00:53:01,699 INFO L226 Difference]: Without dead ends: 834 [2022-11-26 00:53:01,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:53:01,705 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 213 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:01,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1296 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:53:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-11-26 00:53:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2022-11-26 00:53:01,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 580 states have (on average 1.5810344827586207) internal successors, (917), 609 states have internal predecessors, (917), 198 states have call successors, (198), 58 states have call predecessors, (198), 55 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-26 00:53:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1325 transitions. [2022-11-26 00:53:01,754 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1325 transitions. Word has length 111 [2022-11-26 00:53:01,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:01,754 INFO L495 AbstractCegarLoop]: Abstraction has 834 states and 1325 transitions. [2022-11-26 00:53:01,755 INFO L496 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) [2022-11-26 00:53:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1325 transitions. [2022-11-26 00:53:01,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-26 00:53:01,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:01,759 INFO L195 NwaCegarLoop]: 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] [2022-11-26 00:53:01,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:53:01,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:01,967 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:53:01,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:01,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2099866642, now seen corresponding path program 1 times [2022-11-26 00:53:01,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:01,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182251265] [2022-11-26 00:53:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:01,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:02,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:53:02,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:02,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182251265] [2022-11-26 00:53:02,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182251265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:02,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708264957] [2022-11-26 00:53:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:02,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:02,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:02,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:02,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:53:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:02,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:53:02,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:53:02,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:53:02,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708264957] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:02,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:53:02,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:53:02,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653133528] [2022-11-26 00:53:02,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:02,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:53:02,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:53:02,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:53:02,568 INFO L87 Difference]: Start difference. First operand 834 states and 1325 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) [2022-11-26 00:53:02,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:02,894 INFO L93 Difference]: Finished difference Result 1734 states and 2798 transitions. [2022-11-26 00:53:02,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:53:02,894 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 [2022-11-26 00:53:02,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:02,900 INFO L225 Difference]: With dead ends: 1734 [2022-11-26 00:53:02,900 INFO L226 Difference]: Without dead ends: 912 [2022-11-26 00:53:02,905 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:53:02,906 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 211 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:02,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1296 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:53:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-11-26 00:53:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 912. [2022-11-26 00:53:02,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 656 states have (on average 1.6204268292682926) internal successors, (1063), 685 states have internal predecessors, (1063), 198 states have call successors, (198), 60 states have call predecessors, (198), 57 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-26 00:53:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1471 transitions. [2022-11-26 00:53:02,957 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1471 transitions. Word has length 116 [2022-11-26 00:53:02,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:02,957 INFO L495 AbstractCegarLoop]: Abstraction has 912 states and 1471 transitions. [2022-11-26 00:53:02,957 INFO L496 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) [2022-11-26 00:53:02,958 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1471 transitions. [2022-11-26 00:53:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-26 00:53:02,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:02,962 INFO L195 NwaCegarLoop]: 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] [2022-11-26 00:53:02,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:53:03,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:03,169 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:53:03,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:03,170 INFO L85 PathProgramCache]: Analyzing trace with hash -438632994, now seen corresponding path program 1 times [2022-11-26 00:53:03,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:03,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113494108] [2022-11-26 00:53:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:03,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-26 00:53:03,382 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113494108] [2022-11-26 00:53:03,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113494108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264448478] [2022-11-26 00:53:03,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:03,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:03,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:03,384 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:03,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:53:03,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:03,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:53:03,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:53:03,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:53:03,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264448478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:03,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:53:03,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:53:03,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709037764] [2022-11-26 00:53:03,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:03,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:53:03,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:03,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:53:03,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:53:03,752 INFO L87 Difference]: Start difference. First operand 912 states and 1471 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) [2022-11-26 00:53:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:04,073 INFO L93 Difference]: Finished difference Result 1890 states and 3088 transitions. [2022-11-26 00:53:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:53:04,074 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 [2022-11-26 00:53:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:04,080 INFO L225 Difference]: With dead ends: 1890 [2022-11-26 00:53:04,080 INFO L226 Difference]: Without dead ends: 990 [2022-11-26 00:53:04,085 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:53:04,086 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 209 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:04,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1296 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:53:04,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-26 00:53:04,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 990. [2022-11-26 00:53:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 732 states have (on average 1.651639344262295) internal successors, (1209), 761 states have internal predecessors, (1209), 198 states have call successors, (198), 62 states have call predecessors, (198), 59 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-26 00:53:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1617 transitions. [2022-11-26 00:53:04,136 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1617 transitions. Word has length 120 [2022-11-26 00:53:04,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:04,136 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1617 transitions. [2022-11-26 00:53:04,137 INFO L496 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) [2022-11-26 00:53:04,137 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1617 transitions. [2022-11-26 00:53:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-26 00:53:04,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:04,141 INFO L195 NwaCegarLoop]: 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] [2022-11-26 00:53:04,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:53:04,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:04,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:53:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:04,349 INFO L85 PathProgramCache]: Analyzing trace with hash 549834207, now seen corresponding path program 1 times [2022-11-26 00:53:04,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:04,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442514626] [2022-11-26 00:53:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:04,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:53:04,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:04,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442514626] [2022-11-26 00:53:04,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442514626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:04,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982064592] [2022-11-26 00:53:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:04,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:04,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:04,502 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:04,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:53:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:04,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:53:04,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-26 00:53:04,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:53:04,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982064592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:04,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:53:04,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-26 00:53:04,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116685327] [2022-11-26 00:53:04,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:04,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:53:04,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:04,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:53:04,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:53:04,869 INFO L87 Difference]: Start difference. First operand 990 states and 1617 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) [2022-11-26 00:53:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:05,184 INFO L93 Difference]: Finished difference Result 2046 states and 3378 transitions. [2022-11-26 00:53:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:53:05,185 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 [2022-11-26 00:53:05,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:05,199 INFO L225 Difference]: With dead ends: 2046 [2022-11-26 00:53:05,199 INFO L226 Difference]: Without dead ends: 1068 [2022-11-26 00:53:05,206 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:53:05,207 INFO L413 NwaCegarLoop]: 440 mSDtfsCounter, 207 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:05,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1296 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:53:05,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-11-26 00:53:05,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 1068. [2022-11-26 00:53:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 808 states have (on average 1.676980198019802) internal successors, (1355), 837 states have internal predecessors, (1355), 198 states have call successors, (198), 64 states have call predecessors, (198), 61 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-26 00:53:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1763 transitions. [2022-11-26 00:53:05,261 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1763 transitions. Word has length 123 [2022-11-26 00:53:05,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:05,262 INFO L495 AbstractCegarLoop]: Abstraction has 1068 states and 1763 transitions. [2022-11-26 00:53:05,263 INFO L496 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) [2022-11-26 00:53:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1763 transitions. [2022-11-26 00:53:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-26 00:53:05,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:05,268 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:05,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:53:05,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:05,475 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:53:05,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2146047567, now seen corresponding path program 1 times [2022-11-26 00:53:05,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:05,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142660099] [2022-11-26 00:53:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:05,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:53:05,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:05,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142660099] [2022-11-26 00:53:05,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142660099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:05,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:05,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:53:05,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132495964] [2022-11-26 00:53:05,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:05,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:53:05,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:05,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:53:05,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:53:05,632 INFO L87 Difference]: Start difference. First operand 1068 states and 1763 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-26 00:53:05,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:05,981 INFO L93 Difference]: Finished difference Result 2208 states and 3666 transitions. [2022-11-26 00:53:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:53:05,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 125 [2022-11-26 00:53:05,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:05,988 INFO L225 Difference]: With dead ends: 2208 [2022-11-26 00:53:05,988 INFO L226 Difference]: Without dead ends: 1136 [2022-11-26 00:53:05,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:53:05,994 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 99 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:05,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1309 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:53:05,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-11-26 00:53:06,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1136. [2022-11-26 00:53:06,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 874 states have (on average 1.591533180778032) internal successors, (1391), 903 states have internal predecessors, (1391), 198 states have call successors, (198), 66 states have call predecessors, (198), 63 states have return successors, (210), 190 states have call predecessors, (210), 195 states have call successors, (210) [2022-11-26 00:53:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1799 transitions. [2022-11-26 00:53:06,043 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1799 transitions. Word has length 125 [2022-11-26 00:53:06,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:06,044 INFO L495 AbstractCegarLoop]: Abstraction has 1136 states and 1799 transitions. [2022-11-26 00:53:06,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-26 00:53:06,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1799 transitions. [2022-11-26 00:53:06,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-26 00:53:06,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:06,048 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:06,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:53:06,048 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:53:06,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:06,049 INFO L85 PathProgramCache]: Analyzing trace with hash 623391102, now seen corresponding path program 1 times [2022-11-26 00:53:06,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:06,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243248955] [2022-11-26 00:53:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:06,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-11-26 00:53:06,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:06,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243248955] [2022-11-26 00:53:06,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243248955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:53:06,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:53:06,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 00:53:06,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103024568] [2022-11-26 00:53:06,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:53:06,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:53:06,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:53:06,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:53:06,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:53:06,297 INFO L87 Difference]: Start difference. First operand 1136 states and 1799 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-26 00:53:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:53:06,996 INFO L93 Difference]: Finished difference Result 2331 states and 3678 transitions. [2022-11-26 00:53:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:53:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 125 [2022-11-26 00:53:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:53:07,003 INFO L225 Difference]: With dead ends: 2331 [2022-11-26 00:53:07,003 INFO L226 Difference]: Without dead ends: 1024 [2022-11-26 00:53:07,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:53:07,010 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 659 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 2574 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:53:07,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 2574 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:53:07,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-11-26 00:53:07,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1002. [2022-11-26 00:53:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 724 states have (on average 1.5) internal successors, (1086), 755 states have internal predecessors, (1086), 207 states have call successors, (207), 74 states have call predecessors, (207), 70 states have return successors, (224), 196 states have call predecessors, (224), 204 states have call successors, (224) [2022-11-26 00:53:07,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 1517 transitions. [2022-11-26 00:53:07,062 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 1517 transitions. Word has length 125 [2022-11-26 00:53:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:53:07,063 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 1517 transitions. [2022-11-26 00:53:07,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-26 00:53:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 1517 transitions. [2022-11-26 00:53:07,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-26 00:53:07,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:53:07,067 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:53:07,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-26 00:53:07,068 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:53:07,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:53:07,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1665311154, now seen corresponding path program 1 times [2022-11-26 00:53:07,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:53:07,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285658927] [2022-11-26 00:53:07,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:07,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:53:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-26 00:53:09,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:53:09,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285658927] [2022-11-26 00:53:09,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285658927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:53:09,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269571508] [2022-11-26 00:53:09,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:53:09,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:53:09,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:53:09,037 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:53:09,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:53:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:53:09,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-26 00:53:09,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:53:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-26 00:53:10,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:54:03,044 WARN L233 SmtUtils]: Spent 49.36s on a formula simplification. DAG size of input: 1441 DAG size of output: 51 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-26 00:54:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-26 00:54:06,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269571508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:54:06,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521560632] [2022-11-26 00:54:06,121 INFO L159 IcfgInterpreter]: Started Sifa with 84 locations of interest [2022-11-26 00:54:06,121 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:54:06,125 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:54:06,130 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:54:06,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:54:09,327 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-11-26 00:54:13,254 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-26 00:54:14,018 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 564 for LOIs [2022-11-26 00:54:24,976 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 60 for LOIs [2022-11-26 00:54:24,983 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 96 for LOIs [2022-11-26 00:54:25,290 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 97 for LOIs [2022-11-26 00:54:25,697 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 433 for LOIs [2022-11-26 00:54:26,581 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 60 for LOIs [2022-11-26 00:54:26,602 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-26 00:54:26,743 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 76 for LOIs [2022-11-26 00:54:26,760 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:54:49,987 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:54:57,427 WARN L233 SmtUtils]: Spent 7.00s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:06,204 WARN L233 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:22,275 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 602 DAG size of output: 579 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:28,177 WARN L233 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 602 DAG size of output: 579 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:55:33,976 WARN L233 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 598 DAG size of output: 575 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:56:09,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34063#(and (<= 0 |timeShift_processWaitingOnFloor_#in~floorID#1|) (= |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 0) (= |old(~floorButtons_2~0)| 0) (<= ~floorButtons_3~0 0) (= ~executiveFloor~0 4) (= |old(~persons_1~0)| 0) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~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) (<= ~personOnFloor_5_1~0 1) (= |old(~floorButtons_0~0)| 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (<= ~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) (<= ~calls_0~0 0) (= ~head~0.offset 0) (<= 0 |timeShift_resetFloorButton_#in~floorID#1|) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (= ~persons_4~0 0) (<= |timeShift_processWaitingOnFloor_#in~floorID#1| 0) (<= 0 ~floorButtons_3~0) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= 0 |timeShift_processWaitingOnFloor_~floorID#1|) (= |timeShift_processWaitingOnFloor_~tmp___0~10#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 0) (<= 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_processWaitingOnFloor_~tmp___10~0#1| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= 1 ~currentHeading~0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= 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) (= |#NULL.offset| 0) (<= ~floorButtons_4~0 0) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |old(~currentHeading~0)| 1) (= |timeShift_processWaitingOnFloor_~tmp___8~1#1| 0) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |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) (<= 0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (= |old(~floorButtons_1~0)| 0) (= |old(~currentFloorID~0)| 0) (<= 0 |#StackHeapBarrier|) (<= ~floorButtons_1~0 0) (<= |timeShift_processWaitingOnFloor_~floorID#1| 0) (= |timeShift_processWaitingOnFloor_~tmp___2~4#1| 0) (= ~cleanupTimeShifts~0 12) (= |timeShift_processWaitingOnFloor_~tmp___4~1#1| 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0) (= ~persons_2~0 0))' at error location [2022-11-26 00:56:09,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:56:09,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:09,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 16] total 43 [2022-11-26 00:56:09,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295165215] [2022-11-26 00:56:09,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:09,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-26 00:56:09,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:09,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-26 00:56:09,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=966, Invalid=9336, Unknown=0, NotChecked=0, Total=10302 [2022-11-26 00:56:09,029 INFO L87 Difference]: Start difference. First operand 1002 states and 1517 transitions. Second operand has 43 states, 31 states have (on average 5.290322580645161) internal successors, (164), 32 states have internal predecessors, (164), 10 states have call successors, (47), 9 states have call predecessors, (47), 18 states have return successors, (46), 19 states have call predecessors, (46), 10 states have call successors, (46) [2022-11-26 00:56:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:26,331 INFO L93 Difference]: Finished difference Result 3199 states and 4926 transitions. [2022-11-26 00:56:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-26 00:56:26,332 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 31 states have (on average 5.290322580645161) internal successors, (164), 32 states have internal predecessors, (164), 10 states have call successors, (47), 9 states have call predecessors, (47), 18 states have return successors, (46), 19 states have call predecessors, (46), 10 states have call successors, (46) Word has length 126 [2022-11-26 00:56:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:26,344 INFO L225 Difference]: With dead ends: 3199 [2022-11-26 00:56:26,344 INFO L226 Difference]: Without dead ends: 1772 [2022-11-26 00:56:26,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 303 SyntacticMatches, 15 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11255 ImplicationChecksByTransitivity, 107.1s TimeCoverageRelationStatistics Valid=2568, Invalid=25824, Unknown=0, NotChecked=0, Total=28392 [2022-11-26 00:56:26,362 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 3329 mSDsluCounter, 4073 mSDsCounter, 0 mSdLazyCounter, 19450 mSolverCounterSat, 2296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3377 SdHoareTripleChecker+Valid, 4391 SdHoareTripleChecker+Invalid, 21746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2296 IncrementalHoareTripleChecker+Valid, 19450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:26,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3377 Valid, 4391 Invalid, 21746 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2296 Valid, 19450 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2022-11-26 00:56:26,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2022-11-26 00:56:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1647. [2022-11-26 00:56:26,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1647 states, 1156 states have (on average 1.4065743944636677) internal successors, (1626), 1218 states have internal predecessors, (1626), 364 states have call successors, (364), 132 states have call predecessors, (364), 126 states have return successors, (406), 344 states have call predecessors, (406), 361 states have call successors, (406) [2022-11-26 00:56:26,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1647 states to 1647 states and 2396 transitions. [2022-11-26 00:56:26,504 INFO L78 Accepts]: Start accepts. Automaton has 1647 states and 2396 transitions. Word has length 126 [2022-11-26 00:56:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:26,504 INFO L495 AbstractCegarLoop]: Abstraction has 1647 states and 2396 transitions. [2022-11-26 00:56:26,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 31 states have (on average 5.290322580645161) internal successors, (164), 32 states have internal predecessors, (164), 10 states have call successors, (47), 9 states have call predecessors, (47), 18 states have return successors, (46), 19 states have call predecessors, (46), 10 states have call successors, (46) [2022-11-26 00:56:26,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1647 states and 2396 transitions. [2022-11-26 00:56:26,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-26 00:56:26,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:26,511 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:26,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-26 00:56:26,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:26,718 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:56:26,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:26,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1729776230, now seen corresponding path program 1 times [2022-11-26 00:56:26,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:26,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577946030] [2022-11-26 00:56:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:26,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-26 00:56:26,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:26,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577946030] [2022-11-26 00:56:26,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577946030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:26,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563074261] [2022-11-26 00:56:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:26,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:26,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:26,944 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:26,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:56:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:27,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:56:27,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:27,410 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-26 00:56:27,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:56:27,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563074261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:56:27,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:56:27,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2022-11-26 00:56:27,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464520677] [2022-11-26 00:56:27,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:56:27,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:56:27,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:27,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:56:27,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:56:27,417 INFO L87 Difference]: Start difference. First operand 1647 states and 2396 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-11-26 00:56:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:28,377 INFO L93 Difference]: Finished difference Result 3114 states and 4525 transitions. [2022-11-26 00:56:28,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:56:28,378 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 131 [2022-11-26 00:56:28,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:28,388 INFO L225 Difference]: With dead ends: 3114 [2022-11-26 00:56:28,388 INFO L226 Difference]: Without dead ends: 1480 [2022-11-26 00:56:28,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:56:28,397 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 333 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:28,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 2225 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:56:28,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2022-11-26 00:56:28,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1456. [2022-11-26 00:56:28,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1041 states have (on average 1.4159462055715657) internal successors, (1474), 1087 states have internal predecessors, (1474), 303 states have call successors, (303), 116 states have call predecessors, (303), 111 states have return successors, (332), 288 states have call predecessors, (332), 300 states have call successors, (332) [2022-11-26 00:56:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 2109 transitions. [2022-11-26 00:56:28,523 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 2109 transitions. Word has length 131 [2022-11-26 00:56:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:28,523 INFO L495 AbstractCegarLoop]: Abstraction has 1456 states and 2109 transitions. [2022-11-26 00:56:28,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2022-11-26 00:56:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 2109 transitions. [2022-11-26 00:56:28,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-26 00:56:28,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:28,534 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:28,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:28,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:56:28,742 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:56:28,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:28,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1623554504, now seen corresponding path program 1 times [2022-11-26 00:56:28,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:28,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564060005] [2022-11-26 00:56:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:28,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-11-26 00:56:29,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:29,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564060005] [2022-11-26 00:56:29,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564060005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:29,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977163998] [2022-11-26 00:56:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:29,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:29,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:29,548 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:29,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:56:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:29,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:56:29,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 94 proven. 18 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-11-26 00:56:30,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-11-26 00:56:30,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977163998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:30,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [473808479] [2022-11-26 00:56:30,868 INFO L159 IcfgInterpreter]: Started Sifa with 115 locations of interest [2022-11-26 00:56:30,869 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:30,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:56:30,870 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:56:30,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:56:37,508 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2022-11-26 00:56:47,022 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 35 for LOIs [2022-11-26 00:56:47,106 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 46 for LOIs [2022-11-26 00:56:47,193 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 82 for LOIs [2022-11-26 00:56:47,738 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 25 for LOIs [2022-11-26 00:56:47,804 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2022-11-26 00:56:47,817 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 70 for LOIs [2022-11-26 00:56:47,835 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 48 for LOIs [2022-11-26 00:56:47,841 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-11-26 00:56:51,250 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-26 00:56:51,845 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 45 for LOIs [2022-11-26 00:56:51,908 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 41 for LOIs [2022-11-26 00:56:51,914 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-26 00:56:52,058 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:57:15,090 WARN L233 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:57:22,976 WARN L233 SmtUtils]: Spent 7.41s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:57:32,684 WARN L233 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:57:45,915 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 647 DAG size of output: 556 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:58:22,782 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48942#(and (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483648)) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483648)) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483647) (<= 4 ~executiveFloor~0) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483647) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= 0 ~head~0.base) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-26 00:58:22,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:58:22,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:58:22,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 30 [2022-11-26 00:58:22,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713630145] [2022-11-26 00:58:22,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:58:22,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-26 00:58:22,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:58:22,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-26 00:58:22,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1135, Invalid=14615, Unknown=0, NotChecked=0, Total=15750 [2022-11-26 00:58:22,789 INFO L87 Difference]: Start difference. First operand 1456 states and 2109 transitions. Second operand has 30 states, 24 states have (on average 8.666666666666666) internal successors, (208), 26 states have internal predecessors, (208), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) [2022-11-26 00:58:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:58:40,918 INFO L93 Difference]: Finished difference Result 4758 states and 7103 transitions. [2022-11-26 00:58:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-26 00:58:40,919 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 8.666666666666666) internal successors, (208), 26 states have internal predecessors, (208), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) Word has length 242 [2022-11-26 00:58:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:58:40,950 INFO L225 Difference]: With dead ends: 4758 [2022-11-26 00:58:40,951 INFO L226 Difference]: Without dead ends: 3530 [2022-11-26 00:58:40,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 834 GetRequests, 635 SyntacticMatches, 17 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13578 ImplicationChecksByTransitivity, 93.2s TimeCoverageRelationStatistics Valid=2208, Invalid=31464, Unknown=0, NotChecked=0, Total=33672 [2022-11-26 00:58:40,973 INFO L413 NwaCegarLoop]: 479 mSDtfsCounter, 7695 mSDsluCounter, 4426 mSDsCounter, 0 mSdLazyCounter, 20186 mSolverCounterSat, 5430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7708 SdHoareTripleChecker+Valid, 4905 SdHoareTripleChecker+Invalid, 25616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5430 IncrementalHoareTripleChecker+Valid, 20186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:58:40,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7708 Valid, 4905 Invalid, 25616 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5430 Valid, 20186 Invalid, 0 Unknown, 0 Unchecked, 15.2s Time] [2022-11-26 00:58:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2022-11-26 00:58:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3255. [2022-11-26 00:58:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3255 states, 2328 states have (on average 1.3926116838487972) internal successors, (3242), 2421 states have internal predecessors, (3242), 651 states have call successors, (651), 284 states have call predecessors, (651), 275 states have return successors, (768), 621 states have call predecessors, (768), 643 states have call successors, (768) [2022-11-26 00:58:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 4661 transitions. [2022-11-26 00:58:41,356 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 4661 transitions. Word has length 242 [2022-11-26 00:58:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:58:41,360 INFO L495 AbstractCegarLoop]: Abstraction has 3255 states and 4661 transitions. [2022-11-26 00:58:41,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 8.666666666666666) internal successors, (208), 26 states have internal predecessors, (208), 14 states have call successors, (68), 7 states have call predecessors, (68), 10 states have return successors, (66), 15 states have call predecessors, (66), 14 states have call successors, (66) [2022-11-26 00:58:41,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 4661 transitions. [2022-11-26 00:58:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-26 00:58:41,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:58:41,380 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:58:41,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:58:41,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:58:41,589 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:58:41,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:58:41,590 INFO L85 PathProgramCache]: Analyzing trace with hash -2121238479, now seen corresponding path program 1 times [2022-11-26 00:58:41,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:58:41,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133168641] [2022-11-26 00:58:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:41,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:58:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-26 00:58:42,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:58:42,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133168641] [2022-11-26 00:58:42,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133168641] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:58:42,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358586967] [2022-11-26 00:58:42,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:58:42,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:58:42,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:58:42,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:58:42,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:58:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:58:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:58:42,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:58:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 68 proven. 10 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-11-26 00:58:43,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:58:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-26 00:58:43,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358586967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:58:43,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148623062] [2022-11-26 00:58:43,385 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2022-11-26 00:58:43,385 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:58:43,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:58:43,386 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:58:43,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:58:47,544 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2022-11-26 00:58:57,551 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 42 for LOIs [2022-11-26 00:58:57,858 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 18 for LOIs [2022-11-26 00:58:57,883 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 73 for LOIs [2022-11-26 00:58:57,985 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 25 for LOIs [2022-11-26 00:58:58,043 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 50 for LOIs [2022-11-26 00:58:58,055 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 54 for LOIs [2022-11-26 00:58:58,068 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 18 for LOIs [2022-11-26 00:58:58,070 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-11-26 00:59:01,872 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-26 00:59:02,602 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 31 for LOIs [2022-11-26 00:59:02,640 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 29 for LOIs [2022-11-26 00:59:02,642 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-26 00:59:02,815 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:59:25,401 WARN L233 SmtUtils]: Spent 7.22s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:33,024 WARN L233 SmtUtils]: Spent 7.27s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:41,969 WARN L233 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:59:54,864 WARN L233 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 647 DAG size of output: 556 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:00:27,541 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '61312#(and (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483648)) (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483648)) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483647) (<= 4 ~executiveFloor~0) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp___0~9#1| 2147483647) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= 0 ~head~0.base) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-26 01:00:27,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:00:27,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:27,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-11-26 01:00:27,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805135001] [2022-11-26 01:00:27,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:27,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 01:00:27,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:27,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 01:00:27,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1085, Invalid=10687, Unknown=0, NotChecked=0, Total=11772 [2022-11-26 01:00:27,546 INFO L87 Difference]: Start difference. First operand 3255 states and 4661 transitions. Second operand has 26 states, 20 states have (on average 10.25) internal successors, (205), 22 states have internal predecessors, (205), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2022-11-26 01:00:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:43,556 INFO L93 Difference]: Finished difference Result 9148 states and 13353 transitions. [2022-11-26 01:00:43,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-26 01:00:43,560 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 10.25) internal successors, (205), 22 states have internal predecessors, (205), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) Word has length 192 [2022-11-26 01:00:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:43,596 INFO L225 Difference]: With dead ends: 9148 [2022-11-26 01:00:43,596 INFO L226 Difference]: Without dead ends: 5094 [2022-11-26 01:00:43,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 499 SyntacticMatches, 20 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12173 ImplicationChecksByTransitivity, 86.9s TimeCoverageRelationStatistics Valid=2344, Invalid=26048, Unknown=0, NotChecked=0, Total=28392 [2022-11-26 01:00:43,631 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 6821 mSDsluCounter, 3499 mSDsCounter, 0 mSdLazyCounter, 16202 mSolverCounterSat, 5433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6841 SdHoareTripleChecker+Valid, 4013 SdHoareTripleChecker+Invalid, 21635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5433 IncrementalHoareTripleChecker+Valid, 16202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:43,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6841 Valid, 4013 Invalid, 21635 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5433 Valid, 16202 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-11-26 01:00:43,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5094 states. [2022-11-26 01:00:44,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5094 to 4699. [2022-11-26 01:00:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4699 states, 3370 states have (on average 1.3913946587537092) internal successors, (4689), 3456 states have internal predecessors, (4689), 897 states have call successors, (897), 440 states have call predecessors, (897), 431 states have return successors, (1093), 862 states have call predecessors, (1093), 886 states have call successors, (1093) [2022-11-26 01:00:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4699 states to 4699 states and 6679 transitions. [2022-11-26 01:00:44,200 INFO L78 Accepts]: Start accepts. Automaton has 4699 states and 6679 transitions. Word has length 192 [2022-11-26 01:00:44,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:44,200 INFO L495 AbstractCegarLoop]: Abstraction has 4699 states and 6679 transitions. [2022-11-26 01:00:44,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 10.25) internal successors, (205), 22 states have internal predecessors, (205), 14 states have call successors, (66), 8 states have call predecessors, (66), 9 states have return successors, (64), 15 states have call predecessors, (64), 13 states have call successors, (64) [2022-11-26 01:00:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4699 states and 6679 transitions. [2022-11-26 01:00:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-11-26 01:00:44,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:44,239 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:44,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:44,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:44,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:44,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:44,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1899562054, now seen corresponding path program 1 times [2022-11-26 01:00:44,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:44,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127616331] [2022-11-26 01:00:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:44,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2022-11-26 01:00:44,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:44,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127616331] [2022-11-26 01:00:44,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127616331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:44,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 01:00:44,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-26 01:00:44,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618485101] [2022-11-26 01:00:44,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:44,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 01:00:44,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:44,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 01:00:44,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 01:00:44,952 INFO L87 Difference]: Start difference. First operand 4699 states and 6679 transitions. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-26 01:00:45,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:45,539 INFO L93 Difference]: Finished difference Result 9266 states and 13250 transitions. [2022-11-26 01:00:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 01:00:45,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) Word has length 316 [2022-11-26 01:00:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:45,574 INFO L225 Difference]: With dead ends: 9266 [2022-11-26 01:00:45,574 INFO L226 Difference]: Without dead ends: 4921 [2022-11-26 01:00:45,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-26 01:00:45,596 INFO L413 NwaCegarLoop]: 520 mSDtfsCounter, 17 mSDsluCounter, 2035 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 2555 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:45,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 2555 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:00:45,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4921 states. [2022-11-26 01:00:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4921 to 4835. [2022-11-26 01:00:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4835 states, 3469 states have (on average 1.3796483136350532) internal successors, (4786), 3579 states have internal predecessors, (4786), 895 states have call successors, (895), 440 states have call predecessors, (895), 470 states have return successors, (1143), 875 states have call predecessors, (1143), 884 states have call successors, (1143) [2022-11-26 01:00:46,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4835 states to 4835 states and 6824 transitions. [2022-11-26 01:00:46,076 INFO L78 Accepts]: Start accepts. Automaton has 4835 states and 6824 transitions. Word has length 316 [2022-11-26 01:00:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:46,077 INFO L495 AbstractCegarLoop]: Abstraction has 4835 states and 6824 transitions. [2022-11-26 01:00:46,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (33), 3 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-26 01:00:46,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4835 states and 6824 transitions. [2022-11-26 01:00:46,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-11-26 01:00:46,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:46,116 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 10, 10, 10, 10, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:46,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-26 01:00:46,117 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:46,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1520067014, now seen corresponding path program 1 times [2022-11-26 01:00:46,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:46,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630674958] [2022-11-26 01:00:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:46,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 87 proven. 126 refuted. 0 times theorem prover too weak. 646 trivial. 0 not checked. [2022-11-26 01:00:50,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:50,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630674958] [2022-11-26 01:00:50,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630674958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:50,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116208385] [2022-11-26 01:00:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:50,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:50,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:50,075 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:50,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 01:00:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:50,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 3101 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 01:00:50,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 404 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-11-26 01:00:50,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 01:00:50,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116208385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 01:00:50,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 01:00:50,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [24] total 25 [2022-11-26 01:00:50,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799683707] [2022-11-26 01:00:50,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 01:00:50,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 01:00:50,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:50,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 01:00:50,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-26 01:00:50,789 INFO L87 Difference]: Start difference. First operand 4835 states and 6824 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-26 01:00:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:51,373 INFO L93 Difference]: Finished difference Result 8006 states and 11321 transitions. [2022-11-26 01:00:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 01:00:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) Word has length 385 [2022-11-26 01:00:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:51,400 INFO L225 Difference]: With dead ends: 8006 [2022-11-26 01:00:51,400 INFO L226 Difference]: Without dead ends: 4744 [2022-11-26 01:00:51,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2022-11-26 01:00:51,416 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 395 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:51,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 967 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:00:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4744 states. [2022-11-26 01:00:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4744 to 4722. [2022-11-26 01:00:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4722 states, 3375 states have (on average 1.3662222222222222) internal successors, (4611), 3483 states have internal predecessors, (4611), 879 states have call successors, (879), 438 states have call predecessors, (879), 467 states have return successors, (1109), 860 states have call predecessors, (1109), 868 states have call successors, (1109) [2022-11-26 01:00:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4722 states to 4722 states and 6599 transitions. [2022-11-26 01:00:51,917 INFO L78 Accepts]: Start accepts. Automaton has 4722 states and 6599 transitions. Word has length 385 [2022-11-26 01:00:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:51,920 INFO L495 AbstractCegarLoop]: Abstraction has 4722 states and 6599 transitions. [2022-11-26 01:00:51,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 2 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 2 states have call predecessors, (42), 2 states have call successors, (42) [2022-11-26 01:00:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 4722 states and 6599 transitions. [2022-11-26 01:00:51,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-11-26 01:00:51,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:51,962 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 12, 10, 10, 10, 10, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:00:51,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:52,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 01:00:52,173 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:00:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:52,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1779213596, now seen corresponding path program 1 times [2022-11-26 01:00:52,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:52,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624713980] [2022-11-26 01:00:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:52,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 87 proven. 126 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-11-26 01:00:55,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:55,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624713980] [2022-11-26 01:00:55,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624713980] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:55,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984654614] [2022-11-26 01:00:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:55,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:55,855 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:55,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 01:00:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:56,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 3115 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:00:56,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 251 proven. 74 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2022-11-26 01:00:56,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 76 proven. 27 refuted. 0 times theorem prover too weak. 758 trivial. 0 not checked. [2022-11-26 01:00:57,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984654614] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:57,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1907619612] [2022-11-26 01:00:57,630 INFO L159 IcfgInterpreter]: Started Sifa with 146 locations of interest [2022-11-26 01:00:57,630 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:57,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:00:57,631 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:00:57,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:01:05,389 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 550 for LOIs [2022-11-26 01:01:05,829 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 18 for LOIs [2022-11-26 01:01:07,524 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 29 for LOIs [2022-11-26 01:01:07,781 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 48 for LOIs [2022-11-26 01:01:07,830 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 37 for LOIs [2022-11-26 01:01:08,086 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 45 for LOIs [2022-11-26 01:01:08,177 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 18 for LOIs [2022-11-26 01:01:08,184 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 51 for LOIs [2022-11-26 01:01:08,196 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 48 for LOIs [2022-11-26 01:01:08,201 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-11-26 01:01:11,762 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 29 for LOIs [2022-11-26 01:01:11,816 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 52 for LOIs [2022-11-26 01:01:11,826 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 506 for LOIs [2022-11-26 01:01:14,430 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 770 for LOIs [2022-11-26 01:01:19,103 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 623 for LOIs [2022-11-26 01:01:19,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:01:39,072 WARN L233 SmtUtils]: Spent 9.67s on a formula simplification. DAG size of input: 623 DAG size of output: 504 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:01:49,944 WARN L233 SmtUtils]: Spent 10.15s on a formula simplification. DAG size of input: 663 DAG size of output: 518 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:01:58,064 WARN L233 SmtUtils]: Spent 7.50s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:02:06,107 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:02:23,622 WARN L233 SmtUtils]: Spent 16.70s on a formula simplification. DAG size of input: 770 DAG size of output: 638 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:02:31,884 WARN L233 SmtUtils]: Spent 7.38s on a formula simplification that was a NOOP. DAG size: 773 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:03:38,966 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '122146#(and (= |timeShift_isExecutiveFloor_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1|) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| ~doorState~0) (<= 0 (+ |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483648)) (<= 0 (+ |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483648)) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| 2147483647) (<= 0 |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1|) (= |timeShift_isExecutiveFloor_~floorID#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~tmp~22#1| 2147483647) (<= 4 ~executiveFloor~0) (= ~head~0.offset 0) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 0)) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| |timeShift_isExecutiveFloor_#res#1|) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1|)) (<= |#NULL.offset| 0) (= |timeShift_isExecutiveFloor_~retValue_acc~29#1| (ite (= ~executiveFloor~0 |timeShift_isExecutiveFloor_~floorID#1|) 1 0)) (<= 0 |timeShift_~tmp___9~2#1|) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1| 2147483647) (= |timeShift_areDoorsOpen_#res#1| |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|) (= ~currentFloorID~0 |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1|) (<= 0 ~head~0.base) (<= 0 (+ 2147483648 |timeShift___utac_acc__Specification14_spec__1_~tmp___1~2#1|)) (= |timeShift___utac_acc__Specification14_spec__1_~tmp___0~2#1| 0) (<= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 2147483647) (<= ~head~0.base 0) (<= 0 |timeShift_stopRequestedAtCurrentFloor_#res#1|) (<= |timeShift_stopRequestedAtCurrentFloor_~retValue_acc~25#1| 1) (= |timeShift_areDoorsOpen_~retValue_acc~15#1| |timeShift_areDoorsOpen_#res#1|) (<= |timeShift_~tmp___9~2#1| 1) (= |timeShift___utac_acc__Specification14_spec__1_~tmp~2#1| |timeShift_isExecutiveFloor_#in~floorID#1|) (<= |timeShift_stopRequestedAtCurrentFloor_#res#1| 1) (<= 0 |#NULL.offset|) (<= ~executiveFloor~0 4) (<= 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (not (= |timeShift___utac_acc__Specification14_spec__1_~tmp___2~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-11-26 01:03:38,966 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 01:03:38,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:03:38,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 10, 10] total 39 [2022-11-26 01:03:38,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657625950] [2022-11-26 01:03:38,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:03:38,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-26 01:03:38,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:03:38,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-26 01:03:38,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1342, Invalid=21308, Unknown=0, NotChecked=0, Total=22650 [2022-11-26 01:03:38,973 INFO L87 Difference]: Start difference. First operand 4722 states and 6599 transitions. Second operand has 39 states, 31 states have (on average 11.35483870967742) internal successors, (352), 33 states have internal predecessors, (352), 17 states have call successors, (110), 7 states have call predecessors, (110), 14 states have return successors, (106), 19 states have call predecessors, (106), 17 states have call successors, (106) [2022-11-26 01:04:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:04:45,481 INFO L93 Difference]: Finished difference Result 16249 states and 23133 transitions. [2022-11-26 01:04:45,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 303 states. [2022-11-26 01:04:45,482 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 31 states have (on average 11.35483870967742) internal successors, (352), 33 states have internal predecessors, (352), 17 states have call successors, (110), 7 states have call predecessors, (110), 14 states have return successors, (106), 19 states have call predecessors, (106), 17 states have call successors, (106) Word has length 389 [2022-11-26 01:04:45,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:04:45,542 INFO L225 Difference]: With dead ends: 16249 [2022-11-26 01:04:45,542 INFO L226 Difference]: Without dead ends: 9153 [2022-11-26 01:04:45,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1652 GetRequests, 1170 SyntacticMatches, 35 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90091 ImplicationChecksByTransitivity, 166.4s TimeCoverageRelationStatistics Valid=14128, Invalid=187024, Unknown=0, NotChecked=0, Total=201152 [2022-11-26 01:04:45,596 INFO L413 NwaCegarLoop]: 980 mSDtfsCounter, 18475 mSDsluCounter, 12660 mSDsCounter, 0 mSdLazyCounter, 50661 mSolverCounterSat, 15520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18475 SdHoareTripleChecker+Valid, 13640 SdHoareTripleChecker+Invalid, 66181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 15520 IncrementalHoareTripleChecker+Valid, 50661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:04:45,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18475 Valid, 13640 Invalid, 66181 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [15520 Valid, 50661 Invalid, 0 Unknown, 0 Unchecked, 37.8s Time] [2022-11-26 01:04:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9153 states. [2022-11-26 01:04:46,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9153 to 8508. [2022-11-26 01:04:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8508 states, 6061 states have (on average 1.3411978221415608) internal successors, (8129), 6265 states have internal predecessors, (8129), 1584 states have call successors, (1584), 821 states have call predecessors, (1584), 862 states have return successors, (2139), 1528 states have call predecessors, (2139), 1562 states have call successors, (2139) [2022-11-26 01:04:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8508 states to 8508 states and 11852 transitions. [2022-11-26 01:04:46,374 INFO L78 Accepts]: Start accepts. Automaton has 8508 states and 11852 transitions. Word has length 389 [2022-11-26 01:04:46,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:04:46,375 INFO L495 AbstractCegarLoop]: Abstraction has 8508 states and 11852 transitions. [2022-11-26 01:04:46,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 31 states have (on average 11.35483870967742) internal successors, (352), 33 states have internal predecessors, (352), 17 states have call successors, (110), 7 states have call predecessors, (110), 14 states have return successors, (106), 19 states have call predecessors, (106), 17 states have call successors, (106) [2022-11-26 01:04:46,376 INFO L276 IsEmpty]: Start isEmpty. Operand 8508 states and 11852 transitions. [2022-11-26 01:04:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-26 01:04:46,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:04:46,427 INFO L195 NwaCegarLoop]: 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] [2022-11-26 01:04:46,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 01:04:46,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 01:04:46,640 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 01:04:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:04:46,640 INFO L85 PathProgramCache]: Analyzing trace with hash 550947024, now seen corresponding path program 1 times [2022-11-26 01:04:46,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:04:46,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243907361] [2022-11-26 01:04:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:46,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:04:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2022-11-26 01:04:47,086 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:04:47,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243907361] [2022-11-26 01:04:47,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243907361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:04:47,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926892867] [2022-11-26 01:04:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:04:47,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:04:47,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:04:47,088 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:04:47,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2c4caa-79f8-418f-a823-97b63059efb6/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 01:04:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:04:47,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 01:04:47,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:04:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 105 proven. 18 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-11-26 01:04:47,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:04:48,314 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2022-11-26 01:04:48,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926892867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:04:48,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [667460474] [2022-11-26 01:04:48,318 INFO L159 IcfgInterpreter]: Started Sifa with 111 locations of interest [2022-11-26 01:04:48,318 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:04:48,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 01:04:48,319 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 01:04:48,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 01:04:53,615 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 647 for LOIs [2022-11-26 01:05:01,770 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 35 for LOIs [2022-11-26 01:05:01,848 INFO L197 IcfgInterpreter]: Interpreting procedure isExecutiveFloorCalling with input of size 46 for LOIs [2022-11-26 01:05:01,915 INFO L197 IcfgInterpreter]: Interpreting procedure isPersonOnFloor with input of size 82 for LOIs [2022-11-26 01:05:02,115 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedAtCurrentFloor__wrappee__empty with input of size 20 for LOIs [2022-11-26 01:05:02,176 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 21 for LOIs [2022-11-26 01:05:02,186 INFO L197 IcfgInterpreter]: Interpreting procedure resetCallOnFloor with input of size 70 for LOIs [2022-11-26 01:05:02,199 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 48 for LOIs [2022-11-26 01:05:02,204 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 569 for LOIs [2022-11-26 01:05:05,682 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 573 for LOIs [2022-11-26 01:05:06,276 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 45 for LOIs [2022-11-26 01:05:06,332 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 41 for LOIs [2022-11-26 01:05:06,335 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 501 for LOIs [2022-11-26 01:05:06,474 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 01:05:28,512 WARN L233 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:35,911 WARN L233 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 641 DAG size of output: 588 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 01:05:44,617 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification. DAG size of input: 768 DAG size of output: 590 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)